/*******************************************************************************
* Copyright (c) 2009, 2012 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
*******************************************************************************/
package org.eclipse.jst.jsp.core.internal.modelquery;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.Stack;
import org.eclipse.jst.jsp.core.internal.contentmodel.TaglibController;
import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TLDCMDocumentManager;
import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TaglibTracker;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.eclipse.wst.xml.core.internal.contentmodel.CMElementDeclaration;
import org.eclipse.wst.xml.core.internal.contentmodel.CMNamedNodeMap;
import org.eclipse.wst.xml.core.internal.contentmodel.CMNode;
import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.ModelQuery;
import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.extension.ModelQueryExtension;
import org.eclipse.wst.xml.core.internal.modelquery.ModelQueryUtil;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* An implementation of {@link ModelQueryExtension} for tag libraries in JSP documents
*/
public class TaglibModelQueryExtension extends ModelQueryExtension {
private final Stack fExtensions = new Stack();
/**
* @see org.eclipse.wst.xml.core.internal.contentmodel.modelquery.extension.ModelQueryExtension#getAvailableElementContent(org.w3c.dom.Element, java.lang.String, int)
*/
public CMNode[] getAvailableElementContent(Element parentElement,
String namespace, int includeOptions) {
CMNode[] nodes = EMPTY_CMNODE_ARRAY;
ArrayList nodeList = new ArrayList();
//only returns anything if looking for child nodes
if(((includeOptions & ModelQuery.INCLUDE_CHILD_NODES) != 0) && parentElement instanceof IDOMElement) {
//get the trackers
IDOMElement elem = (IDOMElement)parentElement;
IStructuredDocument structDoc = elem.getModel().getStructuredDocument();
TLDCMDocumentManager manager = TaglibController.getTLDCMDocumentManager(structDoc);
if(manager != null) {
List trackers = new ArrayList(manager.getTaglibTrackers());
Set prefixes = new HashSet();
//for each tracker add each of its elements to the node list
for(int trackerIndex = 0; trackerIndex < trackers.size(); ++trackerIndex) {
TaglibTracker tracker = ((TaglibTracker)trackers.get(trackerIndex));
CMNamedNodeMap elements = tracker.getElements();
for(int elementIndex = 0; elementIndex < elements.getLength(); ++elementIndex) {
nodeList.add(elements.item(elementIndex));
}
prefixes.add(tracker.getPrefix());
}
String prefix = parentElement.getPrefix();
if (prefixes.contains(prefix)) {
Node parent = parentElement;
while ((parent = parent.getParentNode()) != null && parent.getNodeType() == Node.ELEMENT_NODE) {
prefix = parent.getPrefix();
if (prefix == null || !prefixes.contains(prefix)) {
ModelQuery query = ModelQueryUtil.getModelQuery(parentElement.getOwnerDocument());
if (query != null) {
CMElementDeclaration decl = query.getCMElementDeclaration((Element) parent);
if (decl != null && !fExtensions.contains(this)) {
fExtensions.push(this);
nodeList.addAll(query.getAvailableContent((Element) parent, decl, includeOptions));
fExtensions.pop();
}
}
break;
}
}
}
nodes = (CMNode[])nodeList.toArray(new CMNode[nodeList.size()]);
}
}
return nodes;
}
}