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package com.sun.faces.facelets.tag.jsf;
import com.sun.faces.application.ApplicationAssociate;
import com.sun.faces.application.annotation.FacesComponentUsage;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import java.util.List;
import java.util.logging.Logger;
import javax.faces.FacesException;
import javax.faces.component.FacesComponent;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
public class FacesComponentTagLibrary extends LazyTagLibrary {
private static final Logger LOGGER = FacesLogger.FACELETS_COMPONENT.getLogger();
private ApplicationAssociate appAss;
public FacesComponentTagLibrary(String ns) {
super(ns);
if (null == ns) {
throw new NullPointerException();
}
appAss = ApplicationAssociate.getCurrentInstance();
}
@Override
public boolean containsTagHandler(String ns, String localName) {
Util.notNull("namespace", ns);
Util.notNull("tagName", localName);
if (!ns.equals(this.getNamespace())) {
return false;
}
// Check the cache maintained by our superclass...
boolean containsTagHandler = super.containsTagHandler(ns, localName);
if (!containsTagHandler) {
FacesComponentUsage matchingFacesComponentUsage =
findFacesComponentUsageForLocalName(ns, localName);
containsTagHandler = null != matchingFacesComponentUsage;
}
return containsTagHandler;
}
private FacesComponentUsage findFacesComponentUsageForLocalName(String ns, String localName) {
FacesComponentUsage result = null;
Util.notNull("namespace", ns);
Util.notNull("tagName", localName);
if (!ns.equals(this.getNamespace())) {
return result;
}
List<FacesComponentUsage> componentsForNamespace = appAss.getComponentsForNamespace(ns);
String tagName;
for (FacesComponentUsage cur: componentsForNamespace) {
FacesComponent curFacesComponent = cur.getAnnotation();
tagName = curFacesComponent.tagName();
// if the current entry has an explicitly declared tagName...
if (null != tagName && 0 < tagName.length()) {
// compare it to the argument tagName
if (localName.equals(tagName)) {
result = cur;
break;
}
} else if (null != tagName) {
tagName = cur.getTarget().getSimpleName();
tagName = tagName.substring(0, 1).toLowerCase() + tagName.substring(1);
if (localName.equals(tagName)) {
result = cur;
break;
}
}
}
return result;
}
@Override
public TagHandler createTagHandler(String ns, String localName, TagConfig tag) throws FacesException {
assert(containsTagHandler(ns, localName));
TagHandler result = super.createTagHandler(ns, localName, tag);
if (null == result) {
FacesComponentUsage facesComponentUsage =
findFacesComponentUsageForLocalName(ns, localName);
String componentType = facesComponentUsage.getAnnotation().value();
if (null == componentType || 0 == componentType.length()) {
componentType = facesComponentUsage.getTarget().getSimpleName();
componentType = Character.toLowerCase(componentType.charAt(0)) +
componentType.substring(1);
}
UIComponent throwAwayComponent = FacesContext.getCurrentInstance().
getApplication().createComponent(componentType);
String rendererType = throwAwayComponent.getRendererType();
super.addComponent(localName, componentType, rendererType);
result = super.createTagHandler(ns, localName, tag);
}
return result;
}
@Override
public boolean tagLibraryForNSExists(String ns) {
boolean result = false;
List<FacesComponentUsage> componentsForNamespace = appAss.getComponentsForNamespace(ns);
result = !componentsForNamespace.isEmpty();
return result;
}
}