/*******************************************************************************
* Copyright (c) 2004, 2010 IBM Corporation and others. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Danail Nachev - ProSyst - bug 218625
* Rob Harrop - SpringSource Inc. (bug 247522)
******************************************************************************/
package org.eclipse.osgi.internal.module;
import java.security.AccessController;
import java.util.*;
import org.eclipse.osgi.framework.adaptor.FrameworkAdaptor;
import org.eclipse.osgi.framework.debug.Debug;
import org.eclipse.osgi.framework.debug.FrameworkDebugOptions;
import org.eclipse.osgi.framework.internal.core.Constants;
import org.eclipse.osgi.framework.internal.core.FilterImpl;
import org.eclipse.osgi.framework.util.SecureAction;
import org.eclipse.osgi.internal.module.GroupingChecker.PackageRoots;
import org.eclipse.osgi.internal.resolver.BundleDescriptionImpl;
import org.eclipse.osgi.internal.resolver.ExportPackageDescriptionImpl;
import org.eclipse.osgi.service.resolver.*;
import org.eclipse.osgi.util.ManifestElement;
import org.osgi.framework.*;
public class ResolverImpl implements org.eclipse.osgi.service.resolver.Resolver {
// Debug fields
private static final String RESOLVER = FrameworkAdaptor.FRAMEWORK_SYMBOLICNAME + "/resolver"; //$NON-NLS-1$
private static final String OPTION_DEBUG = RESOLVER + "/debug";//$NON-NLS-1$
private static final String OPTION_WIRING = RESOLVER + "/wiring"; //$NON-NLS-1$
private static final String OPTION_IMPORTS = RESOLVER + "/imports"; //$NON-NLS-1$
private static final String OPTION_REQUIRES = RESOLVER + "/requires"; //$NON-NLS-1$
private static final String OPTION_GENERICS = RESOLVER + "/generics"; //$NON-NLS-1$
private static final String OPTION_USES = RESOLVER + "/uses"; //$NON-NLS-1$
private static final String OPTION_CYCLES = RESOLVER + "/cycles"; //$NON-NLS-1$
public static boolean DEBUG = false;
public static boolean DEBUG_WIRING = false;
public static boolean DEBUG_IMPORTS = false;
public static boolean DEBUG_REQUIRES = false;
public static boolean DEBUG_GENERICS = false;
public static boolean DEBUG_USES = false;
public static boolean DEBUG_CYCLES = false;
private static int MAX_MULTIPLE_SUPPLIERS_MERGE = 10;
private static int MAX_USES_TIME_BASE = 30000; // 30 seconds
private static int MAX_USES_TIME_LIMIT = 90000; // 90 seconds
static final SecureAction secureAction = (SecureAction) AccessController.doPrivileged(SecureAction.createSecureAction());
private String[][] CURRENT_EES;
// The State associated with this resolver
private State state;
// Used to check permissions for import/export, provide/require, host/fragment
private final PermissionChecker permissionChecker;
// Set of bundles that are pending removal
private MappedList removalPending = new MappedList();
// Indicates whether this resolver has been initialized
private boolean initialized = false;
// Repository for exports
private VersionHashMap resolverExports = null;
// Repository for bundles
private VersionHashMap resolverBundles = null;
// Repository for generics
private VersionHashMap resolverGenerics = null;
// List of unresolved bundles
private HashSet unresolvedBundles = null;
// Keys are BundleDescriptions, values are ResolverBundles
private HashMap bundleMapping = null;
private GroupingChecker groupingChecker;
private Comparator selectionPolicy;
private boolean developmentMode = false;
private boolean usesCalculationTimeout = false;
private volatile CompositeResolveHelperRegistry compositeHelpers;
public ResolverImpl(BundleContext context, boolean checkPermissions) {
this.permissionChecker = new PermissionChecker(context, checkPermissions, this);
}
PermissionChecker getPermissionChecker() {
return permissionChecker;
}
// Initializes the resolver
private void initialize() {
resolverExports = new VersionHashMap(this);
resolverBundles = new VersionHashMap(this);
resolverGenerics = new VersionHashMap(this);
unresolvedBundles = new HashSet();
bundleMapping = new HashMap();
BundleDescription[] bundles = state.getBundles();
groupingChecker = new GroupingChecker();
ArrayList fragmentBundles = new ArrayList();
// Add each bundle to the resolver's internal state
for (int i = 0; i < bundles.length; i++)
initResolverBundle(bundles[i], fragmentBundles, false);
// Add each removal pending bundle to the resolver's internal state
Object[] removedBundles = removalPending.getAllValues();
for (int i = 0; i < removedBundles.length; i++)
initResolverBundle((BundleDescription) removedBundles[i], fragmentBundles, true);
// Iterate over the resolved fragments and attach them to their hosts
for (Iterator iter = fragmentBundles.iterator(); iter.hasNext();) {
ResolverBundle fragment = (ResolverBundle) iter.next();
BundleDescription[] hosts = ((HostSpecification) fragment.getHost().getVersionConstraint()).getHosts();
for (int i = 0; i < hosts.length; i++) {
ResolverBundle host = (ResolverBundle) bundleMapping.get(hosts[i]);
if (host != null)
// Do not add fragment exports here because they would have been added by the host above.
host.attachFragment(fragment, false);
}
}
rewireBundles(); // Reconstruct wirings
setDebugOptions();
initialized = true;
}
private void initResolverBundle(BundleDescription bundleDesc, ArrayList fragmentBundles, boolean pending) {
ResolverBundle bundle = new ResolverBundle(bundleDesc, this);
bundleMapping.put(bundleDesc, bundle);
if (!pending || bundleDesc.isResolved()) {
resolverExports.put(bundle.getExportPackages());
resolverBundles.put(bundle.getName(), bundle);
resolverGenerics.put(bundle.getGenericCapabilities());
}
if (bundleDesc.isResolved()) {
bundle.setState(ResolverBundle.RESOLVED);
if (bundleDesc.getHost() != null)
fragmentBundles.add(bundle);
} else {
if (!pending)
unresolvedBundles.add(bundle);
}
}
// Re-wire previously resolved bundles
private void rewireBundles() {
ArrayList visited = new ArrayList(bundleMapping.size());
for (Iterator iter = bundleMapping.values().iterator(); iter.hasNext();) {
ResolverBundle rb = (ResolverBundle) iter.next();
if (!rb.getBundle().isResolved() || rb.isFragment())
continue;
rewireBundle(rb, visited);
}
}
private void rewireBundle(ResolverBundle rb, ArrayList visited) {
if (visited.contains(rb))
return;
visited.add(rb);
// Wire requires to bundles
BundleConstraint[] requires = rb.getRequires();
for (int i = 0; i < requires.length; i++) {
rewireRequire(requires[i], visited);
}
// Wire imports to exports
ResolverImport[] imports = rb.getImportPackages();
for (int i = 0; i < imports.length; i++) {
rewireImport(imports[i], visited);
}
// Wire generics
GenericConstraint[] genericRequires = rb.getGenericRequires();
for (int i = 0; i < genericRequires.length; i++)
rewireGeneric(genericRequires[i], visited);
}
private void rewireGeneric(GenericConstraint constraint, ArrayList visited) {
if (constraint.getMatchingCapabilities() != null)
return;
GenericDescription[] suppliers = ((GenericSpecification) constraint.getVersionConstraint()).getSuppliers();
if (suppliers == null)
return;
Object[] matches = resolverGenerics.get(constraint.getName());
for (int i = 0; i < matches.length; i++) {
GenericCapability match = (GenericCapability) matches[i];
for (int j = 0; j < suppliers.length; j++)
if (match.getBaseDescription() == suppliers[j])
constraint.setMatchingCapability(match);
}
GenericCapability[] matchingCapabilities = constraint.getMatchingCapabilities();
if (matchingCapabilities != null)
for (int i = 0; i < matchingCapabilities.length; i++)
rewireBundle(matchingCapabilities[i].getResolverBundle(), visited);
}
private void rewireRequire(BundleConstraint req, ArrayList visited) {
if (req.getSelectedSupplier() != null)
return;
ResolverBundle matchingBundle = (ResolverBundle) bundleMapping.get(req.getVersionConstraint().getSupplier());
req.addPossibleSupplier(matchingBundle);
if (matchingBundle == null && !req.isOptional()) {
System.err.println("Could not find matching bundle for " + req.getVersionConstraint()); //$NON-NLS-1$
// TODO log error!!
}
if (matchingBundle != null) {
rewireBundle(matchingBundle, visited);
}
}
private void rewireImport(ResolverImport imp, ArrayList visited) {
if (imp.isDynamic() || imp.getSelectedSupplier() != null)
return;
// Re-wire 'imp'
ResolverExport matchingExport = null;
ExportPackageDescription importSupplier = (ExportPackageDescription) imp.getVersionConstraint().getSupplier();
ResolverBundle exporter = importSupplier == null ? null : (ResolverBundle) bundleMapping.get(importSupplier.getExporter());
Object[] matches = resolverExports.get(imp.getName());
for (int j = 0; j < matches.length; j++) {
ResolverExport export = (ResolverExport) matches[j];
if (export.getExporter() == exporter && importSupplier == export.getExportPackageDescription()) {
matchingExport = export;
break;
}
}
imp.addPossibleSupplier(matchingExport);
// If we still have a null wire and it's not optional, then we have an error
if (imp.getSelectedSupplier() == null && !imp.isOptional()) {
System.err.println("Could not find matching export for " + imp.getVersionConstraint()); //$NON-NLS-1$
// TODO log error!!
}
if (imp.getSelectedSupplier() != null) {
rewireBundle(((ResolverExport) imp.getSelectedSupplier()).getExporter(), visited);
}
}
// Checks a bundle to make sure it is valid. If this method returns false for
// a given bundle, then that bundle will not even be considered for resolution
private boolean isResolvable(BundleDescription bundle, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
// check if this is a rejected singleton
if (rejectedSingletons.contains(bundle))
return false;
// check to see if the bundle is disabled
DisabledInfo[] disabledInfos = state.getDisabledInfos(bundle);
if (disabledInfos.length > 0) {
StringBuffer message = new StringBuffer();
for (int i = 0; i < disabledInfos.length; i++) {
if (i > 0)
message.append(' ');
message.append('\"').append(disabledInfos[i].getPolicyName()).append(':').append(disabledInfos[i].getMessage()).append('\"');
}
state.addResolverError(bundle, ResolverError.DISABLED_BUNDLE, message.toString(), null);
return false; // fail because we are disable
}
// Check for singletons
if (bundle.isSingleton()) {
Object[] sameName = resolverBundles.get(bundle.getName());
if (sameName.length > 1) // Need to check if one is already resolved
for (int i = 0; i < sameName.length; i++) {
if (sameName[i] == bundle || !((ResolverBundle) sameName[i]).getBundle().isSingleton())
continue; // Ignore the bundle we are resolving and non-singletons
if (((ResolverBundle) sameName[i]).getBundle().isResolved()) {
rejectedSingletons.add(bundle);
return false; // Must fail since there is already a resolved bundle
}
}
}
// check the required execution environment
String[] ees = bundle.getExecutionEnvironments();
boolean matchedEE = ees.length == 0;
if (!matchedEE)
for (int i = 0; i < ees.length && !matchedEE; i++)
for (int j = 0; j < CURRENT_EES.length && !matchedEE; j++)
for (int k = 0; k < CURRENT_EES[j].length && !matchedEE; k++)
if (CURRENT_EES[j][k].equals(ees[i])) {
((BundleDescriptionImpl) bundle).setEquinoxEE(j);
matchedEE = true;
}
if (!matchedEE) {
StringBuffer bundleEE = new StringBuffer(Constants.BUNDLE_REQUIREDEXECUTIONENVIRONMENT.length() + 20);
bundleEE.append(Constants.BUNDLE_REQUIREDEXECUTIONENVIRONMENT).append(": "); //$NON-NLS-1$
for (int i = 0; i < ees.length; i++) {
if (i > 0)
bundleEE.append(","); //$NON-NLS-1$
bundleEE.append(ees[i]);
}
state.addResolverError(bundle, ResolverError.MISSING_EXECUTION_ENVIRONMENT, bundleEE.toString(), null);
return false;
}
// check the native code specification
NativeCodeSpecification nativeCode = bundle.getNativeCodeSpecification();
if (nativeCode != null) {
NativeCodeDescription[] nativeCodeSuppliers = nativeCode.getPossibleSuppliers();
NativeCodeDescription highestRanked = null;
for (int i = 0; i < nativeCodeSuppliers.length; i++)
if (nativeCode.isSatisfiedBy(nativeCodeSuppliers[i]) && (highestRanked == null || highestRanked.compareTo(nativeCodeSuppliers[i]) < 0))
highestRanked = nativeCodeSuppliers[i];
if (highestRanked == null) {
if (!nativeCode.isOptional()) {
state.addResolverError(bundle, ResolverError.NO_NATIVECODE_MATCH, nativeCode.toString(), nativeCode);
return false;
}
} else {
if (highestRanked.hasInvalidNativePaths()) {
state.addResolverError(bundle, ResolverError.INVALID_NATIVECODE_PATHS, highestRanked.toString(), nativeCode);
return false;
}
}
state.resolveConstraint(nativeCode, highestRanked);
}
// check the platform filter
String platformFilter = bundle.getPlatformFilter();
if (platformFilter == null)
return true;
if (platformProperties == null)
return false;
try {
Filter filter = FilterImpl.newInstance(platformFilter);
for (int i = 0; i < platformProperties.length; i++)
// using matchCase here in case of duplicate case invarient keys (bug 180817)
if (filter.matchCase(platformProperties[i]))
return true;
} catch (InvalidSyntaxException e) {
// return false below
}
state.addResolverError(bundle, ResolverError.PLATFORM_FILTER, platformFilter, null);
return false;
}
// Attach fragment to its host
private void attachFragment(ResolverBundle bundle, ArrayList rejectedSingletons, Collection processedFragments) {
if (processedFragments.contains(bundle.getName()))
return;
processedFragments.add(bundle.getName());
// we want to attach multiple versions of the same fragment
// from highest version to lowest to give the higher versions first pick
// of the available host bundles.
Object[] fragments = resolverBundles.get(bundle.getName());
for (int i = 0; i < fragments.length; i++) {
ResolverBundle fragment = (ResolverBundle) fragments[i];
if (!fragment.isResolved())
attachFragment0(fragment, rejectedSingletons);
}
}
private void attachFragment0(ResolverBundle bundle, ArrayList rejectedSingletons) {
if (!bundle.isFragment() || !bundle.isResolvable() || rejectedSingletons.contains(bundle.getBundle()))
return;
// no need to select singletons now; it will be done when we select the rest of the singleton bundles (bug 152042)
// find all available hosts to attach to.
boolean foundMatch = false;
BundleConstraint hostConstraint = bundle.getHost();
Object[] hosts = resolverBundles.get(hostConstraint.getVersionConstraint().getName());
for (int i = 0; i < hosts.length; i++)
if (((ResolverBundle) hosts[i]).isResolvable() && hostConstraint.isSatisfiedBy((ResolverBundle) hosts[i])) {
foundMatch = true;
resolverExports.put(((ResolverBundle) hosts[i]).attachFragment(bundle, true));
}
if (!foundMatch)
state.addResolverError(bundle.getBundle(), ResolverError.MISSING_FRAGMENT_HOST, bundle.getHost().getVersionConstraint().toString(), bundle.getHost().getVersionConstraint());
}
public synchronized void resolve(BundleDescription[] reRefresh, Dictionary[] platformProperties) {
if (DEBUG)
ResolverImpl.log("*** BEGIN RESOLUTION ***"); //$NON-NLS-1$
if (state == null)
throw new IllegalStateException("RESOLVER_NO_STATE"); //$NON-NLS-1$
if (!initialized)
initialize();
// set developmentMode each resolution
developmentMode = platformProperties.length == 0 ? false : org.eclipse.osgi.framework.internal.core.Constants.DEVELOPMENT_MODE.equals(platformProperties[0].get(org.eclipse.osgi.framework.internal.core.Constants.OSGI_RESOLVER_MODE));
reRefresh = addDevConstraints(reRefresh);
// Unresolve all the supplied bundles and their dependents
if (reRefresh != null)
for (int i = 0; i < reRefresh.length; i++) {
ResolverBundle rb = (ResolverBundle) bundleMapping.get(reRefresh[i]);
if (rb != null)
unresolveBundle(rb, false);
}
// reorder exports and bundles after unresolving the bundles
resolverExports.reorder();
resolverBundles.reorder();
resolverGenerics.reorder();
// always get the latest EEs
getCurrentEEs(platformProperties);
// keep a list of rejected singltons
ArrayList rejectedSingletons = new ArrayList();
boolean resolveOptional = platformProperties.length == 0 ? false : "true".equals(platformProperties[0].get("osgi.resolveOptional")); //$NON-NLS-1$//$NON-NLS-2$
ResolverBundle[] currentlyResolved = null;
if (resolveOptional) {
BundleDescription[] resolvedBundles = state.getResolvedBundles();
currentlyResolved = new ResolverBundle[resolvedBundles.length];
for (int i = 0; i < resolvedBundles.length; i++)
currentlyResolved[i] = (ResolverBundle) bundleMapping.get(resolvedBundles[i]);
}
// attempt to resolve all unresolved bundles
ResolverBundle[] bundles = (ResolverBundle[]) unresolvedBundles.toArray(new ResolverBundle[unresolvedBundles.size()]);
usesCalculationTimeout = false;
resolveBundles(bundles, platformProperties, rejectedSingletons);
if (selectSingletons(bundles, rejectedSingletons)) {
// a singleton was unresolved as a result of selecting a different version
// try to resolve unresolved bundles again; this will attempt to use the selected singleton
bundles = (ResolverBundle[]) unresolvedBundles.toArray(new ResolverBundle[unresolvedBundles.size()]);
resolveBundles(bundles, platformProperties, rejectedSingletons);
}
for (Iterator rejected = rejectedSingletons.iterator(); rejected.hasNext();) {
BundleDescription reject = (BundleDescription) rejected.next();
// need to do a bit of work to figure out which bundle got selected
BundleDescription[] sameNames = state.getBundles(reject.getSymbolicName());
BundleDescription sameName = reject;
for (int i = 0; i < sameNames.length; i++) {
if (sameNames[i] != reject && sameNames[i].isSingleton() && !rejectedSingletons.contains(sameNames[i])) {
sameName = sameNames[i]; // we know this one got selected
break;
}
}
state.addResolverError(reject, ResolverError.SINGLETON_SELECTION, sameName.toString(), null);
}
if (resolveOptional)
resolveOptionalConstraints(currentlyResolved);
if (DEBUG)
ResolverImpl.log("*** END RESOLUTION ***"); //$NON-NLS-1$
}
private BundleDescription[] addDevConstraints(BundleDescription[] reRefresh) {
if (!developmentMode)
return reRefresh; // we don't care about this unless we are in development mode
// when in develoment mode we need to reRefresh hosts of unresolved fragments that add new constraints
// and reRefresh and unresolved bundles that have dependents
HashSet additionalRefresh = new HashSet();
ResolverBundle[] unresolved = (ResolverBundle[]) unresolvedBundles.toArray(new ResolverBundle[unresolvedBundles.size()]);
for (int i = 0; i < unresolved.length; i++) {
addUnresolvedWithDependents(unresolved[i], additionalRefresh);
addHostsFromFragmentConstraints(unresolved[i], additionalRefresh);
}
if (additionalRefresh.size() == 0)
return reRefresh; // no new bundles found to refresh
// add the original reRefresh bundles to the set
if (reRefresh != null)
for (int i = 0; i < reRefresh.length; i++)
additionalRefresh.add(reRefresh[i]);
return (BundleDescription[]) additionalRefresh.toArray(new BundleDescription[additionalRefresh.size()]);
}
private void addUnresolvedWithDependents(ResolverBundle unresolved, HashSet additionalRefresh) {
BundleDescription[] dependents = unresolved.getBundle().getDependents();
if (dependents.length > 0)
additionalRefresh.add(unresolved.getBundle());
}
private void addHostsFromFragmentConstraints(ResolverBundle unresolved, Set additionalRefresh) {
if (!unresolved.isFragment())
return;
ImportPackageSpecification[] newImports = unresolved.getBundle().getImportPackages();
BundleSpecification[] newRequires = unresolved.getBundle().getRequiredBundles();
if (newImports.length == 0 && newRequires.length == 0)
return; // the fragment does not have its own constraints
BundleConstraint hostConstraint = unresolved.getHost();
Object[] hosts = resolverBundles.get(hostConstraint.getVersionConstraint().getName());
for (int j = 0; j < hosts.length; j++)
if (hostConstraint.isSatisfiedBy((ResolverBundle) hosts[j]) && ((ResolverBundle) hosts[j]).isResolved())
// we found a host that is resolved;
// add it to the set of bundle to refresh so we can ensure this fragment is allowed to resolve
additionalRefresh.add(((ResolverBundle) hosts[j]).getBundle());
}
private void resolveOptionalConstraints(ResolverBundle[] bundles) {
for (int i = 0; i < bundles.length; i++) {
if (bundles[i] != null)
resolveOptionalConstraints(bundles[i]);
}
}
// TODO this does not do proper uses constraint verification.
private void resolveOptionalConstraints(ResolverBundle bundle) {
BundleConstraint[] requires = bundle.getRequires();
ArrayList cycle = new ArrayList();
boolean resolvedOptional = false;
for (int i = 0; i < requires.length; i++)
if (requires[i].isOptional() && requires[i].getSelectedSupplier() == null) {
cycle.clear();
resolveRequire(requires[i], cycle);
if (requires[i].getSelectedSupplier() != null)
resolvedOptional = true;
}
ResolverImport[] imports = bundle.getImportPackages();
for (int i = 0; i < imports.length; i++)
if (imports[i].isOptional() && imports[i].getSelectedSupplier() == null) {
cycle.clear();
resolveImport(imports[i], cycle);
if (imports[i].getSelectedSupplier() != null)
resolvedOptional = true;
}
if (resolvedOptional) {
state.resolveBundle(bundle.getBundle(), false, null, null, null, null, null);
stateResolveConstraints(bundle);
stateResolveBundle(bundle);
}
}
private void getCurrentEEs(Dictionary[] platformProperties) {
CURRENT_EES = new String[platformProperties.length][];
for (int i = 0; i < platformProperties.length; i++) {
String eeSpecs = (String) platformProperties[i].get(Constants.FRAMEWORK_EXECUTIONENVIRONMENT);
CURRENT_EES[i] = ManifestElement.getArrayFromList(eeSpecs, ","); //$NON-NLS-1$
}
}
private void resolveBundles(ResolverBundle[] bundles, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
// First check that all the meta-data is valid for each unresolved bundle
// This will reset the resolvable flag for each bundle
for (int i = 0; i < bundles.length; i++) {
state.removeResolverErrors(bundles[i].getBundle());
// if in development mode then make all bundles resolvable
// we still want to call isResolvable here to populate any possible ResolverErrors for the bundle
bundles[i].setResolvable(isResolvable(bundles[i].getBundle(), platformProperties, rejectedSingletons) || developmentMode);
bundles[i].clearRefs();
}
resolveBundles0(bundles, platformProperties, rejectedSingletons);
if (DEBUG_WIRING)
printWirings();
// set the resolved status of the bundles in the State
stateResolveBundles(bundles);
}
private void resolveBundles0(ResolverBundle[] bundles, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
if (developmentMode)
// need to sort bundles to keep consistent order for fragment attachment (bug 174930)
Arrays.sort(bundles);
// First attach all fragments to the matching hosts
Collection processedFragments = new HashSet(bundles.length);
for (int i = 0; i < bundles.length; i++)
attachFragment(bundles[i], rejectedSingletons, processedFragments);
// Lists of cyclic dependencies recording during resolving
ArrayList cycle = new ArrayList(1); // start small
// Attempt to resolve all unresolved bundles
for (int i = 0; i < bundles.length; i++) {
if (DEBUG)
ResolverImpl.log("** RESOLVING " + bundles[i] + " **"); //$NON-NLS-1$ //$NON-NLS-2$
cycle.clear();
resolveBundle(bundles[i], cycle);
// Check for any bundles involved in a cycle.
// if any bundles in the cycle are not resolved then we need to resolve the resolvable ones
checkCycle(cycle);
}
// Resolve all fragments that are still attached to at least one host.
if (unresolvedBundles.size() > 0) {
ResolverBundle[] unresolved = (ResolverBundle[]) unresolvedBundles.toArray(new ResolverBundle[unresolvedBundles.size()]);
for (int i = 0; i < unresolved.length; i++)
resolveFragment(unresolved[i]);
}
checkUsesConstraints(bundles, platformProperties, rejectedSingletons);
checkComposites(bundles, platformProperties, rejectedSingletons);
}
private void checkComposites(ResolverBundle[] bundles, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
CompositeResolveHelperRegistry helpers = getCompositeHelpers();
if (helpers == null)
return;
Set exclude = null;
for (int i = 0; i < bundles.length; i++) {
CompositeResolveHelper helper = helpers.getCompositeResolveHelper(bundles[i].getBundle());
if (helper == null)
continue;
if (!bundles[i].isResolved())
continue;
if (!helper.giveExports(getExportsWiredTo(bundles[i]))) {
state.addResolverError(bundles[i].getBundle(), ResolverError.DISABLED_BUNDLE, null, null);
bundles[i].setResolvable(false);
bundles[i].clearRefs();
// We pass false for keepFragmentsAttached because we need to redo the attachments (bug 272561)
setBundleUnresolved(bundles[i], false, false);
if (exclude == null)
exclude = new HashSet(1);
exclude.add(bundles[i]);
}
}
reResolveBundles(exclude, bundles, platformProperties, rejectedSingletons);
}
private void checkUsesConstraints(ResolverBundle[] bundles, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
ArrayList conflictingConstraints = findBestCombination(bundles, platformProperties);
if (conflictingConstraints == null)
return;
Set conflictedBundles = null;
for (Iterator conflicts = conflictingConstraints.iterator(); conflicts.hasNext();) {
ResolverConstraint conflict = (ResolverConstraint) conflicts.next();
if (conflict.isOptional()) {
conflict.clearPossibleSuppliers();
continue;
}
if (conflictedBundles == null)
conflictedBundles = new HashSet(conflictingConstraints.size());
ResolverBundle conflictedBundle;
if (conflict.isFromFragment())
conflictedBundle = (ResolverBundle) bundleMapping.get(conflict.getVersionConstraint().getBundle());
else
conflictedBundle = conflict.getBundle();
if (conflictedBundle != null) {
if (DEBUG_USES)
System.out.println("Found conflicting constraint: " + conflict + " in bundle " + conflictedBundle); //$NON-NLS-1$//$NON-NLS-2$
conflictedBundles.add(conflictedBundle);
int type = conflict instanceof ResolverImport ? ResolverError.IMPORT_PACKAGE_USES_CONFLICT : ResolverError.REQUIRE_BUNDLE_USES_CONFLICT;
state.addResolverError(conflictedBundle.getBundle(), type, conflict.getVersionConstraint().toString(), conflict.getVersionConstraint());
conflictedBundle.setResolvable(false);
conflictedBundle.clearRefs();
// We pass false for keepFragmentsAttached because we need to redo the attachments (bug 272561)
setBundleUnresolved(conflictedBundle, false, false);
}
}
reResolveBundles(conflictedBundles, bundles, platformProperties, rejectedSingletons);
}
private void reResolveBundles(Set exclude, ResolverBundle[] bundles, Dictionary[] platformProperties, ArrayList rejectedSingletons) {
if (exclude == null || exclude.size() == 0)
return;
ArrayList remainingUnresolved = new ArrayList();
for (int i = 0; i < bundles.length; i++) {
if (!exclude.contains(bundles[i])) {
// We pass false for keepFragmentsAttached because we need to redo the attachments (bug 272561)
setBundleUnresolved(bundles[i], false, false);
remainingUnresolved.add(bundles[i]);
}
}
resolveBundles0((ResolverBundle[]) remainingUnresolved.toArray(new ResolverBundle[remainingUnresolved.size()]), platformProperties, rejectedSingletons);
}
private ArrayList findBestCombination(ResolverBundle[] bundles, Dictionary[] platformProperties) {
Object usesMode = platformProperties.length == 0 ? null : platformProperties[0].get("osgi.resolver.usesMode"); //$NON-NLS-1$
if (usesMode == null)
usesMode = secureAction.getProperty("osgi.resolver.usesMode"); //$NON-NLS-1$
if ("ignore".equals(usesMode) || developmentMode) //$NON-NLS-1$
return null;
HashSet bundleConstraints = new HashSet();
HashSet packageConstraints = new HashSet();
// first try out the initial selections
ArrayList initialConflicts = getConflicts(bundles, packageConstraints, bundleConstraints);
if (initialConflicts == null || "tryFirst".equals(usesMode) || usesCalculationTimeout) { //$NON-NLS-1$
groupingChecker.clear();
// the first combination have no conflicts or
// we only are trying the first combination or
// we have timed out the calculation; return without iterating over all combinations
return initialConflicts;
}
ResolverConstraint[][] multipleSuppliers = getMultipleSuppliers(bundles, packageConstraints, bundleConstraints);
ArrayList conflicts = null;
int[] bestCombination = new int[multipleSuppliers.length];
conflicts = findBestCombination(bundles, multipleSuppliers, bestCombination, initialConflicts);
if (DEBUG_USES) {
System.out.print("Best combination found: "); //$NON-NLS-1$
printCombination(bestCombination);
}
for (int i = 0; i < bestCombination.length; i++) {
for (int j = 0; j < multipleSuppliers[i].length; j++)
multipleSuppliers[i][j].setSelectedSupplier(bestCombination[i]);
}
// do not need to keep uses data in memory
groupingChecker.clear();
return conflicts;
}
private int[] getCombination(ResolverConstraint[][] multipleSuppliers, int[] combination) {
for (int i = 0; i < combination.length; i++)
combination[i] = multipleSuppliers[i][0].getSelectedSupplierIndex();
return combination;
}
private ArrayList findBestCombination(ResolverBundle[] bundles, ResolverConstraint[][] multipleSuppliers, int[] bestCombination, ArrayList bestConflicts) {
// now iterate over every possible combination until either zero conflicts are found
// or we have run out of combinations
// if all combinations are tried then return the combination with the lowest number of conflicts
long initialTime = System.currentTimeMillis();
long timeLimit = Math.min(MAX_USES_TIME_BASE + (bundles.length * 30), MAX_USES_TIME_LIMIT);
int bestConflictCount = getConflictCount(bestConflicts);
ResolverBundle[] bestConflictBundles = getConflictedBundles(bestConflicts);
while (bestConflictCount != 0 && getNextCombination(multipleSuppliers)) {
if ((System.currentTimeMillis() - initialTime) > timeLimit) {
if (DEBUG_USES)
System.out.println("Uses constraint check has timedout. Using the best solution found so far."); //$NON-NLS-1$
usesCalculationTimeout = true;
break;
}
if (DEBUG_USES)
printCombination(getCombination(multipleSuppliers, new int[multipleSuppliers.length]));
// first count the conflicts for the bundles with conflicts from the best combination
// this significantly reduces the time it takes to populate the GroupingChecker for cases where
// the combination is no better.
ArrayList conflicts = getConflicts(bestConflictBundles, null, null);
int conflictCount = getConflictCount(conflicts);
if (conflictCount >= bestConflictCount) {
if (DEBUG_USES)
System.out.println("Combination is not better that current best: " + conflictCount + ">=" + bestConflictCount); //$NON-NLS-1$ //$NON-NLS-2$
// no need to test the other bundles;
// this combination is no better for the bundles which conflict with the current best combination
continue;
}
// this combination improves upon the conflicts for the bundles which conflict with the current best combination;
// do an complete conflict count
conflicts = getConflicts(bundles, null, null);
conflictCount = getConflictCount(conflicts);
if (conflictCount < bestConflictCount) {
// this combination is better that the current best combination; save this combination as the current best
bestConflictCount = conflictCount;
bestConflicts = conflicts;
getCombination(multipleSuppliers, bestCombination);
bestConflictBundles = getConflictedBundles(bestConflicts);
if (DEBUG_USES)
System.out.println("Combination selected as current best: number of conflicts: " + bestConflictCount); //$NON-NLS-1$
} else if (DEBUG_USES) {
System.out.println("Combination is not better that current best: " + conflictCount + ">=" + bestConflictCount); //$NON-NLS-1$ //$NON-NLS-2$
}
}
return bestConflicts;
}
private void printCombination(int[] curCombination) {
StringBuffer sb = new StringBuffer();
sb.append('[');
for (int i = 0; i < curCombination.length; i++) {
sb.append(curCombination[i]);
if (i < curCombination.length - 1)
sb.append(',');
}
sb.append(']');
System.out.println(sb.toString());
}
private ResolverBundle[] getConflictedBundles(ArrayList bestConflicts) {
if (bestConflicts == null)
return new ResolverBundle[0];
ArrayList conflictedBundles = new ArrayList(bestConflicts.size());
for (Iterator iConflicts = bestConflicts.iterator(); iConflicts.hasNext();) {
ResolverConstraint constraint = (ResolverConstraint) iConflicts.next();
if (!conflictedBundles.contains(constraint.getBundle()))
conflictedBundles.add(constraint.getBundle());
}
return (ResolverBundle[]) conflictedBundles.toArray(new ResolverBundle[conflictedBundles.size()]);
}
private boolean getNextCombination(ResolverConstraint[][] multipleSuppliers) {
int current = 0;
while (current < multipleSuppliers.length) {
if (multipleSuppliers[current][0].selectNextSupplier()) {
for (int i = 1; i < multipleSuppliers[current].length; i++)
multipleSuppliers[current][i].selectNextSupplier();
return true; // the current slot has a next supplier
}
for (int i = 0; i < multipleSuppliers[current].length; i++)
multipleSuppliers[current][i].setSelectedSupplier(0); // reset the current slot
current++; // move to the next slot
}
return false;
}
// only count non-optional conflicts
private int getConflictCount(ArrayList conflicts) {
if (conflicts == null || conflicts.size() == 0)
return 0;
int result = 0;
for (Iterator iConflicts = conflicts.iterator(); iConflicts.hasNext();)
if (!((ResolverConstraint) iConflicts.next()).isOptional())
result += 1;
return result;
}
private ArrayList getConflicts(ResolverBundle[] bundles, HashSet packageConstraints, HashSet bundleConstraints) {
groupingChecker.clear();
ArrayList conflicts = null;
for (int i = 0; i < bundles.length; i++)
conflicts = addConflicts(bundles[i], packageConstraints, bundleConstraints, conflicts);
return conflicts;
}
private ArrayList addConflicts(ResolverBundle bundle, HashSet packageConstraints, HashSet bundleConstraints, ArrayList conflicts) {
boolean foundConflict = false;
BundleConstraint[] requires = bundle.getRequires();
for (int i = 0; i < requires.length; i++) {
ResolverBundle selectedSupplier = (ResolverBundle) requires[i].getSelectedSupplier();
PackageRoots[][] conflict = selectedSupplier == null ? null : groupingChecker.isConsistent(bundle, selectedSupplier);
if (conflict != null) {
addConflictNames(conflict, packageConstraints, bundleConstraints);
if (!foundConflict) {
if (conflicts == null)
conflicts = new ArrayList(1);
conflicts.add(requires[i]);
foundConflict = !requires[i].isOptional(); // only record the conflicts upto the first non-optional
}
}
}
ResolverImport[] imports = bundle.getImportPackages();
for (int i = 0; i < imports.length; i++) {
ResolverExport selectedSupplier = (ResolverExport) imports[i].getSelectedSupplier();
PackageRoots[][] conflict = selectedSupplier == null ? null : groupingChecker.isConsistent(bundle, selectedSupplier);
if (conflict != null) {
addConflictNames(conflict, packageConstraints, bundleConstraints);
if (!foundConflict) {
if (conflicts == null)
conflicts = new ArrayList(1);
conflicts.add(imports[i]);
foundConflict = !imports[i].isOptional(); // only record the conflicts upto the first non-optional
}
}
}
return conflicts;
}
// records the conflict names we can use to scope down the list of multiple suppliers
private void addConflictNames(PackageRoots[][] conflict, HashSet packageConstraints, HashSet bundleConstraints) {
if (packageConstraints == null || bundleConstraints == null)
return;
for (int i = 0; i < conflict.length; i++) {
packageConstraints.add(conflict[i][0].getName());
packageConstraints.add(conflict[i][1].getName());
ResolverExport[] exports0 = conflict[i][0].getRoots();
if (exports0 != null)
for (int j = 0; j < exports0.length; j++) {
ResolverBundle exporter = exports0[j].getExporter();
if (exporter != null && exporter.getName() != null)
bundleConstraints.add(exporter.getName());
}
ResolverExport[] exports1 = conflict[i][1].getRoots();
if (exports1 != null)
for (int j = 0; j < exports1.length; j++) {
ResolverBundle exporter = exports1[j].getExporter();
if (exporter != null && exporter.getName() != null)
bundleConstraints.add(exporter.getName());
}
}
}
// get a list of resolver constraints that have multiple suppliers
// a 2 demensional array is used each entry is a list of identical constraints that have identical suppliers.
private ResolverConstraint[][] getMultipleSuppliers(ResolverBundle[] bundles, HashSet packageConstraints, HashSet bundleConstraints) {
ArrayList multipleImportSupplierList = new ArrayList(1);
ArrayList multipleRequireSupplierList = new ArrayList(1);
for (int i = 0; i < bundles.length; i++) {
BundleConstraint[] requires = bundles[i].getRequires();
for (int j = 0; j < requires.length; j++)
if (requires[j].getNumPossibleSuppliers() > 1)
multipleRequireSupplierList.add(requires[j]);
ResolverImport[] imports = bundles[i].getImportPackages();
for (int j = 0; j < imports.length; j++) {
if (imports[j].getNumPossibleSuppliers() > 1) {
Integer eeProfile = (Integer) ((ResolverExport) imports[j].getSelectedSupplier()).getExportPackageDescription().getDirective(ExportPackageDescriptionImpl.EQUINOX_EE);
if (eeProfile.intValue() < 0) {
// this is a normal package; always add it
multipleImportSupplierList.add(imports[j]);
} else {
// this is a system bunde export
// If other exporters of this package also require the system bundle
// then this package does not need to be added to the mix
// this is an optimization for bundles like org.eclipse.xerces
// that export lots of packages also exported by the system bundle on J2SE 1.4
VersionSupplier[] suppliers = imports[j].getPossibleSuppliers();
for (int suppliersIndex = 1; suppliersIndex < suppliers.length; suppliersIndex++) {
Integer ee = (Integer) ((ResolverExport) suppliers[suppliersIndex]).getExportPackageDescription().getDirective(ExportPackageDescriptionImpl.EQUINOX_EE);
if (ee.intValue() >= 0)
continue;
if (((ResolverExport) suppliers[suppliersIndex]).getExporter().getRequire(getSystemBundle()) == null)
if (((ResolverExport) suppliers[suppliersIndex]).getExporter().getRequire(Constants.SYSTEM_BUNDLE_SYMBOLICNAME) == null) {
multipleImportSupplierList.add(imports[j]);
break;
}
}
}
}
}
}
ArrayList results = new ArrayList();
if (multipleImportSupplierList.size() + multipleRequireSupplierList.size() > MAX_MULTIPLE_SUPPLIERS_MERGE) {
// we have hit a max on the multiple suppliers in the lists without merging.
// first merge the identical constraints that have identical suppliers
HashMap multipleImportSupplierMaps = new HashMap(1);
for (Iterator iMultipleImportSuppliers = multipleImportSupplierList.iterator(); iMultipleImportSuppliers.hasNext();)
addMutipleSupplierConstraint(multipleImportSupplierMaps, (ResolverConstraint) iMultipleImportSuppliers.next());
HashMap multipleRequireSupplierMaps = new HashMap(1);
for (Iterator iMultipleRequireSuppliers = multipleRequireSupplierList.iterator(); iMultipleRequireSuppliers.hasNext();)
addMutipleSupplierConstraint(multipleRequireSupplierMaps, (ResolverConstraint) iMultipleRequireSuppliers.next());
addMergedSuppliers(results, multipleImportSupplierMaps);
addMergedSuppliers(results, multipleRequireSupplierMaps);
// check the results to see if we have reduced the number enough
if (results.size() > MAX_MULTIPLE_SUPPLIERS_MERGE && packageConstraints != null && bundleConstraints != null) {
// we still have too big of a list; filter out constraints that are not in conflict
Iterator iResults = results.iterator();
results = new ArrayList();
while (iResults.hasNext()) {
ResolverConstraint[] constraints = (ResolverConstraint[]) iResults.next();
ResolverConstraint constraint = constraints.length > 0 ? constraints[0] : null;
if (constraint instanceof ResolverImport) {
if (packageConstraints.contains(constraint.getName()))
results.add(constraints);
} else if (constraint instanceof BundleConstraint) {
if (bundleConstraints.contains(constraint.getName()))
results.add(constraints);
}
}
}
} else {
// the size is acceptable; just copy the lists as-is
for (Iterator iMultipleImportSuppliers = multipleImportSupplierList.iterator(); iMultipleImportSuppliers.hasNext();)
results.add(new ResolverConstraint[] {(ResolverConstraint) iMultipleImportSuppliers.next()});
for (Iterator iMultipleRequireSuppliers = multipleRequireSupplierList.iterator(); iMultipleRequireSuppliers.hasNext();)
results.add(new ResolverConstraint[] {(ResolverConstraint) iMultipleRequireSuppliers.next()});
}
return (ResolverConstraint[][]) results.toArray(new ResolverConstraint[results.size()][]);
}
String getSystemBundle() {
Dictionary[] platformProperties = state.getPlatformProperties();
String systemBundle = (String) (platformProperties.length == 0 ? null : platformProperties[0].get(Constants.STATE_SYSTEM_BUNDLE));
if (systemBundle == null)
systemBundle = Constants.getInternalSymbolicName();
return systemBundle;
}
private void addMergedSuppliers(ArrayList mergedSuppliers, HashMap constraints) {
for (Iterator iConstraints = constraints.values().iterator(); iConstraints.hasNext();) {
ArrayList mergedConstraintLists = (ArrayList) iConstraints.next();
for (Iterator mergedLists = mergedConstraintLists.iterator(); mergedLists.hasNext();) {
ArrayList constraintList = (ArrayList) mergedLists.next();
mergedSuppliers.add(constraintList.toArray(new ResolverConstraint[constraintList.size()]));
}
}
}
private void addMutipleSupplierConstraint(HashMap constraints, ResolverConstraint constraint) {
ArrayList mergedConstraintLists = (ArrayList) constraints.get(constraint.getName());
if (mergedConstraintLists == null) {
mergedConstraintLists = new ArrayList(1);
ArrayList constraintList = new ArrayList(1);
constraintList.add(constraint);
mergedConstraintLists.add(constraintList);
constraints.put(constraint.getName(), mergedConstraintLists);
return;
}
for (Iterator mergedLists = mergedConstraintLists.iterator(); mergedLists.hasNext();) {
ArrayList constraintList = (ArrayList) mergedLists.next();
ResolverConstraint mergedConstraint = (ResolverConstraint) constraintList.get(0);
VersionSupplier[] suppliers1 = constraint.getPossibleSuppliers();
VersionSupplier[] suppliers2 = mergedConstraint.getPossibleSuppliers();
if (suppliers1.length != suppliers2.length)
continue;
for (int i = 0; i < suppliers1.length; i++)
if (suppliers1[i] != suppliers2[i])
continue;
constraintList.add(constraint);
return;
}
ArrayList constraintList = new ArrayList(1);
constraintList.add(constraint);
mergedConstraintLists.add(constraintList);
}
private void checkCycle(ArrayList cycle) {
int cycleSize = cycle.size();
if (cycleSize == 0)
return;
cycleLoop: for (Iterator iCycle = cycle.iterator(); iCycle.hasNext();) {
ResolverBundle cycleBundle = (ResolverBundle) iCycle.next();
if (!cycleBundle.isResolvable()) {
iCycle.remove(); // remove this bundle from the list of bundles that need re-resolved
continue cycleLoop;
}
// Check that we haven't wired to any dropped exports
ResolverImport[] imports = cycleBundle.getImportPackages();
for (int j = 0; j < imports.length; j++) {
// check for dropped exports
while (imports[j].getSelectedSupplier() != null) {
ResolverExport importSupplier = (ResolverExport) imports[j].getSelectedSupplier();
if (importSupplier.getSubstitute() != null)
imports[j].selectNextSupplier();
else
break;
}
if (!imports[j].isDynamic() && !imports[j].isOptional() && imports[j].getSelectedSupplier() == null) {
cycleBundle.setResolvable(false);
cycleBundle.clearRefs();
state.addResolverError(imports[j].getVersionConstraint().getBundle(), ResolverError.MISSING_IMPORT_PACKAGE, imports[j].getVersionConstraint().toString(), imports[j].getVersionConstraint());
iCycle.remove();
continue cycleLoop;
}
}
}
if (cycle.size() != cycleSize) {
//we removed an un-resolvable bundle; must re-resolve remaining cycle
for (int i = 0; i < cycle.size(); i++) {
ResolverBundle cycleBundle = (ResolverBundle) cycle.get(i);
cycleBundle.clearWires();
cycleBundle.clearRefs();
}
ArrayList innerCycle = new ArrayList(cycle.size());
for (int i = 0; i < cycle.size(); i++)
resolveBundle((ResolverBundle) cycle.get(i), innerCycle);
checkCycle(innerCycle);
} else {
for (int i = 0; i < cycle.size(); i++) {
if (DEBUG || DEBUG_CYCLES)
ResolverImpl.log("Pushing " + cycle.get(i) + " to RESOLVED"); //$NON-NLS-1$ //$NON-NLS-2$
setBundleResolved((ResolverBundle) cycle.get(i));
}
}
}
private boolean selectSingletons(ResolverBundle[] bundles, ArrayList rejectedSingletons) {
if (developmentMode)
return false; // do no want to unresolve singletons in development mode
boolean result = false;
for (int i = 0; i < bundles.length; i++) {
BundleDescription bundleDesc = bundles[i].getBundle();
if (!bundleDesc.isSingleton() || !bundleDesc.isResolved() || rejectedSingletons.contains(bundleDesc))
continue;
Object[] sameName = resolverBundles.get(bundleDesc.getName());
if (sameName.length > 1) { // Need to make a selection based off of num dependents
for (int j = 0; j < sameName.length; j++) {
BundleDescription sameNameDesc = ((VersionSupplier) sameName[j]).getBundle();
ResolverBundle sameNameBundle = (ResolverBundle) sameName[j];
if (sameName[j] == bundles[i] || !sameNameDesc.isSingleton() || !sameNameDesc.isResolved() || rejectedSingletons.contains(sameNameDesc))
continue; // Ignore the bundle we are selecting, non-singletons, and non-resolved
result = true;
boolean rejectedPolicy = selectionPolicy != null ? selectionPolicy.compare(sameNameDesc, bundleDesc) < 0 : sameNameDesc.getVersion().compareTo(bundleDesc.getVersion()) > 0;
int sameNameRefs = sameNameBundle.getRefs();
int curRefs = bundles[i].getRefs();
// a bundle is always rejected if another bundle has more references to it;
// otherwise a bundle is rejected based on the selection policy (version) only if the number of references are equal
if ((sameNameRefs == curRefs && rejectedPolicy) || sameNameRefs > curRefs) {
// this bundle is not selected; add it to the rejected list
if (!rejectedSingletons.contains(bundles[i].getBundle()))
rejectedSingletons.add(bundles[i].getBundle());
break;
}
// we did not select the sameNameDesc; add the bundle to the rejected list
if (!rejectedSingletons.contains(sameNameDesc))
rejectedSingletons.add(sameNameDesc);
}
}
}
// clear the refs; we don't care about the refs after singlton selection
for (int i = 0; i < bundles.length; i++)
bundles[i].clearRefs();
// unresolve the rejected singletons
for (Iterator rejects = rejectedSingletons.iterator(); rejects.hasNext();)
unresolveBundle((ResolverBundle) bundleMapping.get(rejects.next()), false);
// reorder exports and bundles after unresolving the bundles
resolverExports.reorder();
resolverBundles.reorder();
resolverGenerics.reorder();
return result;
}
private void resolveFragment(ResolverBundle fragment) {
if (!fragment.isFragment())
return;
if (fragment.getHost().getNumPossibleSuppliers() > 0)
if (!developmentMode || state.getResolverErrors(fragment.getBundle()).length == 0)
setBundleResolved(fragment);
}
// This method will attempt to resolve the supplied bundle and any bundles that it is dependent on
private boolean resolveBundle(ResolverBundle bundle, ArrayList cycle) {
if (bundle.isFragment())
return false;
if (!bundle.isResolvable()) {
if (DEBUG)
ResolverImpl.log(" - " + bundle + " is unresolvable"); //$NON-NLS-1$ //$NON-NLS-2$
return false;
}
switch (bundle.getState()) {
case ResolverBundle.RESOLVED :
// 'bundle' is already resolved so just return
if (DEBUG)
ResolverImpl.log(" - " + bundle + " already resolved"); //$NON-NLS-1$ //$NON-NLS-2$
return true;
case ResolverBundle.UNRESOLVED :
// 'bundle' is UNRESOLVED so move to RESOLVING
bundle.clearWires();
setBundleResolving(bundle);
break;
case ResolverBundle.RESOLVING :
if (cycle.contains(bundle))
return true;
break;
default :
break;
}
boolean failed = false;
if (!failed) {
GenericConstraint[] genericRequires = bundle.getGenericRequires();
for (int i = 0; i < genericRequires.length; i++) {
if (!resolveGenericReq(genericRequires[i], cycle)) {
if (DEBUG || DEBUG_GENERICS)
ResolverImpl.log("** GENERICS " + genericRequires[i].getVersionConstraint().getName() + "[" + genericRequires[i].getBundleDescription() + "] failed to resolve"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
state.addResolverError(genericRequires[i].getVersionConstraint().getBundle(), ResolverError.MISSING_GENERIC_CAPABILITY, genericRequires[i].getVersionConstraint().toString(), genericRequires[i].getVersionConstraint());
if (genericRequires[i].isFromFragment()) {
if (!developmentMode) // only detach fragments when not in devmode
resolverExports.remove(bundle.detachFragment((ResolverBundle) bundleMapping.get(genericRequires[i].getVersionConstraint().getBundle()), null));
continue;
}
if (!developmentMode) {
// fail fast; otherwise we want to attempt to resolver other constraints in dev mode
failed = true;
break;
}
}
}
}
if (!failed) {
// Iterate thru required bundles of 'bundle' trying to find matching bundles.
BundleConstraint[] requires = bundle.getRequires();
for (int i = 0; i < requires.length; i++) {
if (!resolveRequire(requires[i], cycle)) {
if (DEBUG || DEBUG_REQUIRES)
ResolverImpl.log("** REQUIRE " + requires[i].getVersionConstraint().getName() + "[" + requires[i].getBundleDescription() + "] failed to resolve"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
state.addResolverError(requires[i].getVersionConstraint().getBundle(), ResolverError.MISSING_REQUIRE_BUNDLE, requires[i].getVersionConstraint().toString(), requires[i].getVersionConstraint());
// If the require has failed to resolve and it is from a fragment, then remove the fragment from the host
if (requires[i].isFromFragment()) {
if (!developmentMode) // only detach fragments when not in devmode
resolverExports.remove(bundle.detachFragment((ResolverBundle) bundleMapping.get(requires[i].getVersionConstraint().getBundle()), requires[i]));
continue;
}
if (!developmentMode) {
// fail fast; otherwise we want to attempt to resolver other constraints in dev mode
failed = true;
break;
}
}
}
}
if (!failed) {
// Iterate thru imports of 'bundle' trying to find matching exports.
ResolverImport[] imports = bundle.getImportPackages();
for (int i = 0; i < imports.length; i++) {
// Only resolve non-dynamic imports here
if (!imports[i].isDynamic() && !resolveImport(imports[i], cycle)) {
if (DEBUG || DEBUG_IMPORTS)
ResolverImpl.log("** IMPORT " + imports[i].getName() + "[" + imports[i].getBundleDescription() + "] failed to resolve"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
// If the import has failed to resolve and it is from a fragment, then remove the fragment from the host
state.addResolverError(imports[i].getVersionConstraint().getBundle(), ResolverError.MISSING_IMPORT_PACKAGE, imports[i].getVersionConstraint().toString(), imports[i].getVersionConstraint());
if (imports[i].isFromFragment()) {
if (!developmentMode) // only detach fragments when not in devmode
resolverExports.remove(bundle.detachFragment((ResolverBundle) bundleMapping.get(imports[i].getVersionConstraint().getBundle()), imports[i]));
continue;
}
if (!developmentMode) {
// fail fast; otherwise we want to attempt to resolver other constraints in dev mode
failed = true;
break;
}
}
}
}
// check that fragment constraints are met by the constraints that got resolved to the host
checkFragmentConstraints(bundle);
// do some extra checking when in development mode to see if other resolver error occurred
if (developmentMode && !failed && state.getResolverErrors(bundle.getBundle()).length > 0)
failed = true;
// Need to check that all mandatory imports are wired. If they are then
// set the bundle RESOLVED, otherwise set it back to UNRESOLVED
if (failed) {
setBundleUnresolved(bundle, false, developmentMode);
if (DEBUG)
ResolverImpl.log(bundle + " NOT RESOLVED"); //$NON-NLS-1$
} else if (!cycle.contains(bundle)) {
setBundleResolved(bundle);
if (DEBUG)
ResolverImpl.log(bundle + " RESOLVED"); //$NON-NLS-1$
}
if (bundle.getState() == ResolverBundle.UNRESOLVED)
bundle.setResolvable(false); // Set it to unresolvable so we don't attempt to resolve it again in this round
return bundle.getState() != ResolverBundle.UNRESOLVED;
}
private void checkFragmentConstraints(ResolverBundle bundle) {
// get all currently attached fragments and ensure that any constraints
// they have do not conflict with the constraints resolved to by the host
ResolverBundle[] fragments = bundle.getFragments();
for (int i = 0; i < fragments.length; i++) {
BundleDescription fragment = fragments[i].getBundle();
if (bundle.constraintsConflict(fragment, fragment.getImportPackages(), fragment.getRequiredBundles(), fragment.getGenericRequires()) && !developmentMode)
// found some conflicts; detach the fragment
resolverExports.remove(bundle.detachFragment(fragments[i], null));
}
}
private boolean resolveGenericReq(GenericConstraint constraint, ArrayList cycle) {
if (DEBUG_REQUIRES)
ResolverImpl.log("Trying to resolve: " + constraint.getBundle() + ", " + constraint.getVersionConstraint()); //$NON-NLS-1$ //$NON-NLS-2$
GenericCapability[] matchingCapabilities = constraint.getMatchingCapabilities();
if (matchingCapabilities != null) {
// Check for unrecorded cyclic dependency
for (int i = 0; i < matchingCapabilities.length; i++)
if (matchingCapabilities[i].getResolverBundle().getState() == ResolverBundle.RESOLVING)
if (!cycle.contains(constraint.getBundle()))
cycle.add(constraint.getBundle());
if (DEBUG_REQUIRES)
ResolverImpl.log(" - already wired"); //$NON-NLS-1$
return true; // Already wired (due to grouping dependencies) so just return
}
Object[] capabilities = resolverGenerics.get(constraint.getVersionConstraint().getName());
boolean result = false;
for (int i = 0; i < capabilities.length; i++) {
GenericCapability capability = (GenericCapability) capabilities[i];
if (DEBUG_GENERICS)
ResolverImpl.log("CHECKING GENERICS: " + capability.getBaseDescription()); //$NON-NLS-1$
// Check if capability matches
if (constraint.isSatisfiedBy(capability)) {
capability.getResolverBundle().addRef(constraint.getBundle());
if (result && (((GenericSpecification) constraint.getVersionConstraint()).getResolution() & GenericSpecification.RESOLUTION_MULTIPLE) == 0)
continue; // found a match already and this is not a multiple constraint
constraint.setMatchingCapability(capability); // Wire to the capability
if (constraint.getBundle() == capability.getResolverBundle()) {
result = true; // Wired to ourselves
continue;
}
VersionSupplier[] capabilityHosts = capability.isFromFragment() ? capability.getResolverBundle().getHost().getPossibleSuppliers() : new ResolverBundle[] {capability.getResolverBundle()};
boolean foundResolvedMatch = false;
for (int j = 0; capabilityHosts != null && j < capabilityHosts.length; j++) {
ResolverBundle capabilitySupplier = (ResolverBundle) capabilityHosts[j];
if (capabilitySupplier == constraint.getBundle()) {
// the capability is from a fragment attached to this host do not recursively resolve the host again
foundResolvedMatch = true;
continue;
}
// if in dev mode then allow a constraint to resolve to an unresolved bundle
if (capabilitySupplier.getState() == ResolverBundle.RESOLVED || (resolveBundle(capabilitySupplier, cycle) || developmentMode)) {
foundResolvedMatch |= !capability.isFromFragment() ? true : capability.getResolverBundle().getHost().getPossibleSuppliers() != null;
// Check cyclic dependencies
if (capabilitySupplier.getState() == ResolverBundle.RESOLVING)
if (!cycle.contains(capabilitySupplier))
cycle.add(capabilitySupplier);
}
}
if (!foundResolvedMatch) {
constraint.removeMatchingCapability(capability);
continue; // constraint hasn't resolved
}
if (DEBUG_GENERICS)
ResolverImpl.log("Found match: " + capability.getBaseDescription() + ". Wiring"); //$NON-NLS-1$ //$NON-NLS-2$
result = true;
}
}
return result ? true : (((GenericSpecification) constraint.getVersionConstraint()).getResolution() & GenericSpecification.RESOLUTION_OPTIONAL) != 0;
}
// Resolve the supplied import. Returns true if the import can be resolved, false otherwise
private boolean resolveRequire(BundleConstraint req, ArrayList cycle) {
if (DEBUG_REQUIRES)
ResolverImpl.log("Trying to resolve: " + req.getBundle() + ", " + req.getVersionConstraint()); //$NON-NLS-1$ //$NON-NLS-2$
if (req.getSelectedSupplier() != null) {
// Check for unrecorded cyclic dependency
if (!cycle.contains(req.getBundle())) {
cycle.add(req.getBundle());
if (DEBUG_CYCLES)
ResolverImpl.log("require-bundle cycle: " + req.getBundle() + " -> " + req.getSelectedSupplier()); //$NON-NLS-1$ //$NON-NLS-2$
}
if (DEBUG_REQUIRES)
ResolverImpl.log(" - already wired"); //$NON-NLS-1$
return true; // Already wired (due to grouping dependencies) so just return
}
Object[] bundles = resolverBundles.get(req.getVersionConstraint().getName());
boolean result = false;
for (int i = 0; i < bundles.length; i++) {
ResolverBundle bundle = (ResolverBundle) bundles[i];
if (DEBUG_REQUIRES)
ResolverImpl.log("CHECKING: " + bundle.getBundle()); //$NON-NLS-1$
// Check if export matches
if (req.isSatisfiedBy(bundle)) {
bundle.addRef(req.getBundle());
// first add the possible supplier; this is done before resolving the supplier bundle to prevent endless cycle loops.
req.addPossibleSupplier(bundle);
if (req.getBundle() != bundle) {
// if in dev mode then allow a constraint to resolve to an unresolved bundle
if (bundle.getState() != ResolverBundle.RESOLVED && !resolveBundle(bundle, cycle) && !developmentMode) {
req.removePossibleSupplier(bundle);
continue; // Bundle hasn't resolved
}
}
// Check cyclic dependencies
if (req.getBundle() != bundle) {
if (bundle.getState() == ResolverBundle.RESOLVING)
// If the bundle is RESOLVING, we have a cyclic dependency
if (!cycle.contains(req.getBundle())) {
cycle.add(req.getBundle());
if (DEBUG_CYCLES)
ResolverImpl.log("require-bundle cycle: " + req.getBundle() + " -> " + req.getSelectedSupplier()); //$NON-NLS-1$ //$NON-NLS-2$
}
}
if (DEBUG_REQUIRES)
ResolverImpl.log("Found match: " + bundle.getBundle() + ". Wiring"); //$NON-NLS-1$ //$NON-NLS-2$
result = true;
}
}
if (result || req.isOptional())
return true; // If the req is optional then just return true
return false;
}
// Resolve the supplied import. Returns true if the import can be resolved, false otherwise
private boolean resolveImport(ResolverImport imp, ArrayList cycle) {
if (DEBUG_IMPORTS)
ResolverImpl.log("Trying to resolve: " + imp.getBundle() + ", " + imp.getName()); //$NON-NLS-1$ //$NON-NLS-2$
if (imp.getSelectedSupplier() != null) {
// Check for unrecorded cyclic dependency
if (!cycle.contains(imp.getBundle())) {
cycle.add(imp.getBundle());
if (DEBUG_CYCLES)
ResolverImpl.log("import-package cycle: " + imp.getBundle() + " -> " + imp.getSelectedSupplier() + " from " + imp.getSelectedSupplier().getBundle()); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
if (DEBUG_IMPORTS)
ResolverImpl.log(" - already wired"); //$NON-NLS-1$
return true; // Already wired (due to grouping dependencies) so just return
}
boolean result = false;
ResolverExport[] substitutableExps = imp.getBundle().getExports(imp.getName());
Object[] exports = resolverExports.get(imp.getName());
for (int i = 0; i < exports.length; i++) {
ResolverExport export = (ResolverExport) exports[i];
if (DEBUG_IMPORTS)
ResolverImpl.log("CHECKING: " + export.getExporter().getBundle() + ", " + export.getName()); //$NON-NLS-1$ //$NON-NLS-2$
// Check if export matches
if (imp.isSatisfiedBy(export)) {
int originalState = export.getExporter().getState();
if (imp.isDynamic() && originalState != ResolverBundle.RESOLVED)
continue; // Must not attempt to resolve an exporter when dynamic
if (imp.getSelectedSupplier() != null && ((ResolverExport) imp.getSelectedSupplier()).getExporter() == imp.getBundle())
break; // We wired to ourselves; nobody else matters
export.getExporter().addRef(imp.getBundle());
// first add the possible supplier; this is done before resolving the supplier bundle to prevent endless cycle loops.
imp.addPossibleSupplier(export);
if (imp.getBundle() != export.getExporter()) {
for (int j = 0; j < substitutableExps.length; j++)
if (substitutableExps[j].getSubstitute() == null)
substitutableExps[j].setSubstitute(export); // Import wins, drop export
// if in dev mode then allow a constraint to resolve to an unresolved bundle
if ((originalState != ResolverBundle.RESOLVED && !resolveBundle(export.getExporter(), cycle) && !developmentMode) || export.getSubstitute() != null) {
// remove the possible supplier
imp.removePossibleSupplier(export);
// add back the exports of this package from the importer
if (imp.getSelectedSupplier() == null)
for (int j = 0; j < substitutableExps.length; j++)
if (substitutableExps[j].getSubstitute() == export)
substitutableExps[j].setSubstitute(null);
continue; // Bundle hasn't resolved || export has not been selected and is unavailable
}
} else if (export.getSubstitute() != null)
continue; // we already found a possible import that satisifies us; our export is dropped
// Record any cyclic dependencies
if (imp.getBundle() != export.getExporter())
if (export.getExporter().getState() == ResolverBundle.RESOLVING) {
// If the exporter is RESOLVING, we have a cyclic dependency
if (!cycle.contains(imp.getBundle())) {
cycle.add(imp.getBundle());
if (DEBUG_CYCLES)
ResolverImpl.log("import-package cycle: " + imp.getBundle() + " -> " + imp.getSelectedSupplier() + " from " + imp.getSelectedSupplier().getBundle()); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
}
if (DEBUG_IMPORTS)
ResolverImpl.log("Found match: " + export.getExporter() + ". Wiring " + imp.getBundle() + ":" + imp.getName()); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
result = true;
}
}
if (result)
return true;
if (imp.isOptional())
return true; // If the import is optional then just return true
if (substitutableExps.length > 0 && substitutableExps[0].getSubstitute() == null)
return true; // If we still have an export that is not substituted return true
return false;
}
// Move a bundle to UNRESOLVED
private void setBundleUnresolved(ResolverBundle bundle, boolean removed, boolean keepFragsAttached) {
if (bundle.getState() == ResolverBundle.UNRESOLVED && !developmentMode)
// in this case there is nothing more to do
return;
// Note that when in dev mode we only want to force the fragment detach if asked to;
// this would be done only when forcing a dependency chain to unresolve from unresolveBundle method
if (removed || !keepFragsAttached) {
// Force the initialization of the bundle, its exports and its capabilities. This is needed to force proper attachment of fragments.
resolverExports.remove(bundle.getExportPackages());
resolverGenerics.remove(bundle.getGenericCapabilities());
bundle.detachAllFragments();
bundle.initialize(false);
if (!removed) {
// add back the available exports/capabilities
resolverExports.put(bundle.getExportPackages());
resolverGenerics.put(bundle.getGenericCapabilities());
}
}
// TODO unresolvedBundles should be a set; for now only need to do a contains check in devMode.
if (!removed && (!developmentMode || !unresolvedBundles.contains(bundle)))
unresolvedBundles.add(bundle);
bundle.setState(ResolverBundle.UNRESOLVED);
}
// Move a bundle to RESOLVED
private void setBundleResolved(ResolverBundle bundle) {
if (bundle.getState() == ResolverBundle.RESOLVED)
return;
unresolvedBundles.remove(bundle);
bundle.setState(ResolverBundle.RESOLVED);
}
// Move a bundle to RESOLVING
private void setBundleResolving(ResolverBundle bundle) {
if (bundle.getState() == ResolverBundle.RESOLVING)
return;
unresolvedBundles.remove(bundle);
bundle.setState(ResolverBundle.RESOLVING);
}
// Resolves the bundles in the State
private void stateResolveBundles(ResolverBundle[] resolvedBundles) {
for (int i = 0; i < resolvedBundles.length; i++) {
if (!resolvedBundles[i].getBundle().isResolved())
stateResolveBundle(resolvedBundles[i]);
}
}
private void stateResolveConstraints(ResolverBundle rb) {
ResolverImport[] imports = rb.getImportPackages();
for (int i = 0; i < imports.length; i++) {
ResolverExport export = (ResolverExport) imports[i].getSelectedSupplier();
BaseDescription supplier = export == null ? null : export.getExportPackageDescription();
state.resolveConstraint(imports[i].getVersionConstraint(), supplier);
}
BundleConstraint[] requires = rb.getRequires();
for (int i = 0; i < requires.length; i++) {
ResolverBundle bundle = (ResolverBundle) requires[i].getSelectedSupplier();
BaseDescription supplier = bundle == null ? null : bundle.getBundle();
state.resolveConstraint(requires[i].getVersionConstraint(), supplier);
}
GenericConstraint[] genericRequires = rb.getGenericRequires();
for (int i = 0; i < genericRequires.length; i++) {
GenericCapability[] matchingCapabilities = genericRequires[i].getMatchingCapabilities();
if (matchingCapabilities == null)
state.resolveConstraint(genericRequires[i].getVersionConstraint(), null);
else
for (int j = 0; j < matchingCapabilities.length; j++)
state.resolveConstraint(genericRequires[i].getVersionConstraint(), matchingCapabilities[j].getBaseDescription());
}
}
private void stateResolveFragConstraints(ResolverBundle rb) {
ResolverBundle host = (ResolverBundle) rb.getHost().getSelectedSupplier();
ImportPackageSpecification[] imports = rb.getBundle().getImportPackages();
for (int i = 0; i < imports.length; i++) {
ResolverImport hostImport = host == null ? null : host.getImport(imports[i].getName());
ResolverExport export = (ResolverExport) (hostImport == null ? null : hostImport.getSelectedSupplier());
BaseDescription supplier = export == null ? null : export.getExportPackageDescription();
state.resolveConstraint(imports[i], supplier);
}
BundleSpecification[] requires = rb.getBundle().getRequiredBundles();
for (int i = 0; i < requires.length; i++) {
BundleConstraint hostRequire = host == null ? null : host.getRequire(requires[i].getName());
ResolverBundle bundle = (ResolverBundle) (hostRequire == null ? null : hostRequire.getSelectedSupplier());
BaseDescription supplier = bundle == null ? null : bundle.getBundle();
state.resolveConstraint(requires[i], supplier);
}
}
private void stateResolveBundle(ResolverBundle rb) {
// if in dev mode then we want to tell the state about the constraints we were able to resolve
if (!rb.isResolved() && !developmentMode)
return;
if (rb.isFragment())
stateResolveFragConstraints(rb);
else
stateResolveConstraints(rb);
// Gather selected exports
ResolverExport[] exports = rb.getSelectedExports();
ArrayList selectedExports = new ArrayList(exports.length);
for (int i = 0; i < exports.length; i++) {
if (permissionChecker.checkPackagePermission(exports[i].getExportPackageDescription()))
selectedExports.add(exports[i].getExportPackageDescription());
}
ExportPackageDescription[] selectedExportsArray = (ExportPackageDescription[]) selectedExports.toArray(new ExportPackageDescription[selectedExports.size()]);
// Gather substitute exports
ResolverExport[] substituted = rb.getSubstitutedExports();
ArrayList substitutedExports = new ArrayList(substituted.length);
for (int i = 0; i < substituted.length; i++) {
substitutedExports.add(substituted[i].getExportPackageDescription());
}
ExportPackageDescription[] substitutedExportsArray = (ExportPackageDescription[]) substitutedExports.toArray(new ExportPackageDescription[substitutedExports.size()]);
// Gather exports that have been wired to
ExportPackageDescription[] exportsWiredToArray = getExportsWiredTo(rb);
// Gather bundles that have been wired to
BundleConstraint[] requires = rb.getRequires();
ArrayList bundlesWiredTo = new ArrayList(requires.length);
for (int i = 0; i < requires.length; i++)
if (requires[i].getSelectedSupplier() != null)
bundlesWiredTo.add(requires[i].getSelectedSupplier().getBaseDescription());
BundleDescription[] bundlesWiredToArray = (BundleDescription[]) bundlesWiredTo.toArray(new BundleDescription[bundlesWiredTo.size()]);
BundleDescription[] hostBundles = null;
if (rb.isFragment()) {
VersionSupplier[] matchingBundles = rb.getHost().getPossibleSuppliers();
if (matchingBundles != null && matchingBundles.length > 0) {
hostBundles = new BundleDescription[matchingBundles.length];
for (int i = 0; i < matchingBundles.length; i++) {
hostBundles[i] = matchingBundles[i].getBundle();
if (rb.isNewFragmentExports() && hostBundles[i].isResolved()) {
// update the host's set of selected exports
ResolverExport[] hostExports = ((ResolverBundle) matchingBundles[i]).getSelectedExports();
ExportPackageDescription[] hostExportsArray = new ExportPackageDescription[hostExports.length];
for (int j = 0; j < hostExports.length; j++)
hostExportsArray[j] = hostExports[j].getExportPackageDescription();
state.resolveBundle(hostBundles[i], true, null, hostExportsArray, hostBundles[i].getSubstitutedExports(), hostBundles[i].getResolvedRequires(), hostBundles[i].getResolvedImports());
}
}
}
}
// Resolve the bundle in the state
state.resolveBundle(rb.getBundle(), rb.isResolved(), hostBundles, selectedExportsArray, substitutedExportsArray, bundlesWiredToArray, exportsWiredToArray);
}
private static ExportPackageDescription[] getExportsWiredTo(ResolverBundle rb) {
// Gather exports that have been wired to
ResolverImport[] imports = rb.getImportPackages();
ArrayList exportsWiredTo = new ArrayList(imports.length);
for (int i = 0; i < imports.length; i++)
if (imports[i].getSelectedSupplier() != null)
exportsWiredTo.add(imports[i].getSelectedSupplier().getBaseDescription());
return (ExportPackageDescription[]) exportsWiredTo.toArray(new ExportPackageDescription[exportsWiredTo.size()]);
}
// Resolve dynamic import
public synchronized ExportPackageDescription resolveDynamicImport(BundleDescription importingBundle, String requestedPackage) {
if (state == null)
throw new IllegalStateException("RESOLVER_NO_STATE"); //$NON-NLS-1$
// Make sure the resolver is initialized
if (!initialized)
initialize();
ResolverBundle rb = (ResolverBundle) bundleMapping.get(importingBundle);
if (rb.getExport(requestedPackage) != null)
return null; // do not allow dynamic wires for packages which this bundle exports
ResolverImport[] resolverImports = rb.getImportPackages();
// Check through the ResolverImports of this bundle.
// If there is a matching one then pass it into resolveImport()
boolean found = false;
for (int j = 0; j < resolverImports.length; j++) {
// Make sure it is a dynamic import
if (!resolverImports[j].isDynamic())
continue;
String importName = resolverImports[j].getName();
// If the import uses a wildcard, then temporarily replace this with the requested package
if (importName.equals("*") || //$NON-NLS-1$
(importName.endsWith(".*") && requestedPackage.startsWith(importName.substring(0, importName.length() - 1)))) { //$NON-NLS-1$
resolverImports[j].setName(requestedPackage);
}
// Resolve the import
if (requestedPackage.equals(resolverImports[j].getName())) {
found = true;
// populate the grouping checker with current imports
groupingChecker.populateRoots(resolverImports[j].getBundle());
if (resolveImport(resolverImports[j], new ArrayList())) {
found = false;
while (!found && resolverImports[j].getSelectedSupplier() != null) {
if (groupingChecker.isDynamicConsistent(resolverImports[j].getBundle(), (ResolverExport) resolverImports[j].getSelectedSupplier()) != null)
resolverImports[j].selectNextSupplier(); // not consistent; try the next
else
found = true; // found a valid wire
}
resolverImports[j].setName(null);
if (!found) {
// not found or there was a conflict; reset the suppliers and return null
resolverImports[j].clearPossibleSuppliers();
return null;
}
// If the import resolved then return it's matching export
if (DEBUG_IMPORTS)
ResolverImpl.log("Resolved dynamic import: " + rb + ":" + resolverImports[j].getName() + " -> " + ((ResolverExport) resolverImports[j].getSelectedSupplier()).getExporter() + ":" + requestedPackage); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
ExportPackageDescription matchingExport = ((ResolverExport) resolverImports[j].getSelectedSupplier()).getExportPackageDescription();
// If it is a wildcard import then clear the wire, so other
// exported packages can be found for it
if (importName.endsWith("*")) //$NON-NLS-1$
resolverImports[j].clearPossibleSuppliers();
return matchingExport;
}
}
// Reset the import package name
resolverImports[j].setName(null);
}
// this is to support adding dynamic imports on the fly.
if (!found) {
Map directives = new HashMap(1);
directives.put(Constants.RESOLUTION_DIRECTIVE, ImportPackageSpecification.RESOLUTION_DYNAMIC);
ImportPackageSpecification packageSpec = state.getFactory().createImportPackageSpecification(requestedPackage, null, null, null, directives, null, importingBundle);
ResolverImport newImport = new ResolverImport(rb, packageSpec);
if (resolveImport(newImport, new ArrayList())) {
while (newImport.getSelectedSupplier() != null) {
if (groupingChecker.isDynamicConsistent(rb, (ResolverExport) newImport.getSelectedSupplier()) != null)
newImport.selectNextSupplier();
else
break;
}
return ((ResolverExport) newImport.getSelectedSupplier()).getExportPackageDescription();
}
}
if (DEBUG || DEBUG_IMPORTS)
ResolverImpl.log("Failed to resolve dynamic import: " + requestedPackage); //$NON-NLS-1$
return null; // Couldn't resolve the import, so return null
}
public void bundleAdded(BundleDescription bundle) {
if (!initialized)
return;
if (bundleMapping.get(bundle) != null)
return; // this description already exists in the resolver
ResolverBundle rb = new ResolverBundle(bundle, this);
bundleMapping.put(bundle, rb);
unresolvedBundles.add(rb);
resolverExports.put(rb.getExportPackages());
resolverBundles.put(rb.getName(), rb);
resolverGenerics.put(rb.getGenericCapabilities());
}
public void bundleRemoved(BundleDescription bundle, boolean pending) {
ResolverBundle rb = initialized ? (ResolverBundle) bundleMapping.get(bundle) : null;
if (rb != null)
rb.setUninstalled();
internalBundleRemoved(bundle, pending);
}
private void internalBundleRemoved(BundleDescription bundle, boolean pending) {
// check if there are any dependants
if (pending)
removalPending.put(new Long(bundle.getBundleId()), bundle);
if (!initialized)
return;
ResolverBundle rb = (ResolverBundle) bundleMapping.get(bundle);
if (rb == null)
return;
if (!pending) {
bundleMapping.remove(bundle);
groupingChecker.clear(rb);
}
if (!pending || !bundle.isResolved()) {
resolverExports.remove(rb.getExportPackages());
resolverBundles.remove(rb);
resolverGenerics.remove(rb.getGenericCapabilities());
}
unresolvedBundles.remove(rb);
}
private void unresolveBundle(ResolverBundle bundle, boolean removed) {
if (bundle == null)
return;
// check the removed list if unresolving then remove from the removed list
Object[] removedBundles = removalPending.remove(new Long(bundle.getBundle().getBundleId()));
for (int i = 0; i < removedBundles.length; i++) {
ResolverBundle re = (ResolverBundle) bundleMapping.get(removedBundles[i]);
unresolveBundle(re, true);
state.removeBundleComplete((BundleDescription) removedBundles[i]);
resolverExports.remove(re.getExportPackages());
resolverBundles.remove(re);
resolverGenerics.remove(re.getGenericCapabilities());
bundleMapping.remove(removedBundles[i]);
groupingChecker.clear(re);
// the bundle is removed
if (removedBundles[i] == bundle.getBundle())
removed = true;
}
if (!bundle.getBundle().isResolved() && !developmentMode)
return;
CompositeResolveHelperRegistry currentLinks = compositeHelpers;
if (currentLinks != null) {
CompositeResolveHelper helper = currentLinks.getCompositeResolveHelper(bundle.getBundle());
if (helper != null)
helper.giveExports(null);
}
// if not removed then add to the list of unresolvedBundles,
// passing false for devmode because we need all fragments detached
setBundleUnresolved(bundle, removed, false);
// Get bundles dependent on 'bundle'
BundleDescription[] dependents = bundle.getBundle().getDependents();
state.resolveBundle(bundle.getBundle(), false, null, null, null, null, null);
// Unresolve dependents of 'bundle'
for (int i = 0; i < dependents.length; i++)
unresolveBundle((ResolverBundle) bundleMapping.get(dependents[i]), false);
}
public void bundleUpdated(BundleDescription newDescription, BundleDescription existingDescription, boolean pending) {
internalBundleRemoved(existingDescription, pending);
bundleAdded(newDescription);
}
public void flush() {
resolverExports = null;
resolverBundles = null;
resolverGenerics = null;
unresolvedBundles = null;
bundleMapping = null;
Object[] removed = removalPending.getAllValues();
for (int i = 0; i < removed.length; i++)
state.removeBundleComplete((BundleDescription) removed[i]);
removalPending.clear();
initialized = false;
}
public State getState() {
return state;
}
public void setState(State newState) {
if (this.state != null) {
throw new IllegalStateException("Cannot change the State of a Resolver"); //$NON-NLS-1$
}
state = newState;
flush();
}
private void setDebugOptions() {
FrameworkDebugOptions options = FrameworkDebugOptions.getDefault();
// may be null if debugging is not enabled
if (options == null)
return;
DEBUG = options.getBooleanOption(OPTION_DEBUG, false);
DEBUG_WIRING = options.getBooleanOption(OPTION_WIRING, false);
DEBUG_IMPORTS = options.getBooleanOption(OPTION_IMPORTS, false);
DEBUG_REQUIRES = options.getBooleanOption(OPTION_REQUIRES, false);
DEBUG_GENERICS = options.getBooleanOption(OPTION_GENERICS, false);
DEBUG_USES = options.getBooleanOption(OPTION_USES, false);
DEBUG_CYCLES = options.getBooleanOption(OPTION_CYCLES, false);
}
// LOGGING METHODS
private void printWirings() {
ResolverImpl.log("****** Result Wirings ******"); //$NON-NLS-1$
Object[] bundles = resolverBundles.getAllValues();
for (int j = 0; j < bundles.length; j++) {
ResolverBundle rb = (ResolverBundle) bundles[j];
if (rb.getBundle().isResolved()) {
continue;
}
ResolverImpl.log(" * WIRING for " + rb); //$NON-NLS-1$
// Require bundles
BundleConstraint[] requireBundles = rb.getRequires();
if (requireBundles.length == 0) {
ResolverImpl.log(" (r) no requires"); //$NON-NLS-1$
} else {
for (int i = 0; i < requireBundles.length; i++) {
if (requireBundles[i].getSelectedSupplier() == null) {
ResolverImpl.log(" (r) " + rb.getBundle() + " -> NULL!!!"); //$NON-NLS-1$ //$NON-NLS-2$
} else {
ResolverImpl.log(" (r) " + rb.getBundle() + " -> " + requireBundles[i].getSelectedSupplier()); //$NON-NLS-1$ //$NON-NLS-2$
}
}
}
// Hosts
BundleConstraint hostSpec = rb.getHost();
if (hostSpec != null) {
VersionSupplier[] hosts = hostSpec.getPossibleSuppliers();
if (hosts != null)
for (int i = 0; i < hosts.length; i++) {
ResolverImpl.log(" (h) " + rb.getBundle() + " -> " + hosts[i].getBundle()); //$NON-NLS-1$ //$NON-NLS-2$
}
}
// Imports
ResolverImport[] imports = rb.getImportPackages();
if (imports.length == 0) {
ResolverImpl.log(" (w) no imports"); //$NON-NLS-1$
continue;
}
for (int i = 0; i < imports.length; i++) {
if (imports[i].isDynamic() && imports[i].getSelectedSupplier() == null) {
ResolverImpl.log(" (w) " + imports[i].getBundle() + ":" + imports[i].getName() + " -> DYNAMIC"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
} else if (imports[i].isOptional() && imports[i].getSelectedSupplier() == null) {
ResolverImpl.log(" (w) " + imports[i].getBundle() + ":" + imports[i].getName() + " -> OPTIONAL (could not be wired)"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
} else if (imports[i].getSelectedSupplier() == null) {
ResolverImpl.log(" (w) " + imports[i].getBundle() + ":" + imports[i].getName() + " -> NULL!!!"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
} else {
ResolverImpl.log(" (w) " + imports[i].getBundle() + ":" + imports[i].getName() + " -> " + //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
((ResolverExport) imports[i].getSelectedSupplier()).getExporter() + ":" + imports[i].getSelectedSupplier().getName()); //$NON-NLS-1$
}
}
}
}
static void log(String message) {
Debug.println(message);
}
VersionHashMap getResolverExports() {
return resolverExports;
}
public void setSelectionPolicy(Comparator selectionPolicy) {
this.selectionPolicy = selectionPolicy;
}
public Comparator getSelectionPolicy() {
return selectionPolicy;
}
public void setCompositeResolveHelperRegistry(CompositeResolveHelperRegistry compositeHelpers) {
this.compositeHelpers = compositeHelpers;
}
CompositeResolveHelperRegistry getCompositeHelpers() {
return compositeHelpers;
}
}