/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.jcr;
import javax.jcr.AccessDeniedException;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.lock.LockException;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.version.VersionException;
import org.modeshape.common.annotation.ThreadSafe;
import org.modeshape.jcr.JcrSharedNodeCache.SharedSet;
import org.modeshape.jcr.cache.MutableCachedNode;
import org.modeshape.jcr.cache.NodeKey;
import org.modeshape.jcr.cache.SessionCache;
/**
* A concrete {@link Node JCR Node} implementation.
*
* @see JcrRootNode
*/
@ThreadSafe
class JcrNode extends AbstractJcrNode {
JcrNode( JcrSession session,
NodeKey nodeKey ) {
super(session, nodeKey);
}
@Override
final boolean isRoot() {
return false;
}
@Override
Type type() {
return Type.NODE;
}
@Override
public int getIndex() throws RepositoryException {
return segment().getIndex();
}
@Override
public String getName() throws RepositoryException {
return segment().getName().getString(namespaces());
}
@Override
public AbstractJcrNode getParent() throws ItemNotFoundException, RepositoryException {
checkSession();
NodeKey parentKey = node().getParentKey(sessionCache());
return session().node(parentKey, null);
}
@Override
public String getPath() throws RepositoryException {
// checkSession(); ideally we don't have to do this, because getting the path is a useful thing and is used in 'toString'
return path().getString(namespaces());
}
@Override
boolean isShared() {
// Sometimes, a shareable and shared node is represented by a JcrNode rather than a JcrSharedNode. Therefore,
// the share-related logic needs to be done here ...
try {
return isShareable() && sharedSet().getSize() > 1;
} catch (RepositoryException e) {
// Shouldn't really happen, but just in case ...
throw new RuntimeException(e);
}
}
@Override
protected void doRemove()
throws VersionException, LockException, ConstraintViolationException, AccessDeniedException, RepositoryException {
// Sometimes, a shareable and shared node is represented by a JcrNode rather than a JcrSharedNode. Therefore,
// the share-related logic needs to be done here ...
SessionCache cache = sessionCache();
NodeKey key = key();
MutableCachedNode parent = mutableParent();
if (!isShareable()) {
// It's not shareable, so we will always destroy the node immediately ...
parent.removeChild(cache, key);
cache.destroy(key);
return;
}
// It is shareable, so we need to check how many shares there are before we remove this node from its parent ...
JcrSharedNodeCache shareableNodeCache = session().shareableNodeCache();
SharedSet sharedSet = shareableNodeCache.getSharedSet(this);
if (sharedSet.getSize() <= 1) {
// There are no shares, so destroy the node and the shared set ...
parent.removeChild(cache, key);
cache.destroy(key);
shareableNodeCache.destroyed(key);
return;
}
// The node being removed is shared to at least two places, so we should remove it from the primary parent,
// NOT destroy the node, and adjust the SharedSet ...
parent.removeChild(cache, key);
shareableNodeCache.removed(this);
}
}