/*******************************************************************************
* Copyright (c) 2004, 2006 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.document;
import org.eclipse.jst.jsp.core.internal.Assert;
import org.eclipse.wst.sse.core.internal.provisional.AbstractAdapterFactory;
import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
import org.eclipse.wst.sse.core.internal.provisional.INodeAdapterFactory;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.w3c.dom.Node;
/**
* This class adapts document
* with the an instance of PageDirectiveAdapter
*/
public class PageDirectiveAdapterFactory extends AbstractAdapterFactory implements INodeAdapterFactory {
private PageDirectiveAdapter pageDirectiveAdapterInstance = null;
/**
* Constructor for PageDirectiveAdapterFactory.
* Note: its important not to be a singleton, since
* this factory needs to track its adapter(s) and release
* them when they are released.
*
* @param adapterKey
* @param registerAdapters
*/
protected PageDirectiveAdapterFactory(Object adapterKey, boolean registerAdapters) {
super(adapterKey, registerAdapters);
}
/**
* The no argument constructor assumes its a
* Factory for PageDirectiveAdapter
*/
public PageDirectiveAdapterFactory() {
this(PageDirectiveAdapter.class, true);
}
protected INodeAdapter createAdapter(INodeNotifier target) {
PageDirectiveAdapter result = null;
if (target instanceof IDOMNode) {
IDOMNode node = (IDOMNode) target;
if (node.getNodeType() == Node.DOCUMENT_NODE) {
result = getAdapterInstance(target);
}
}
return result;
}
public void release() {
if (pageDirectiveAdapterInstance != null) {
pageDirectiveAdapterInstance.release();
}
}
/**
* We assume this is only called for 'document' target
*/
protected PageDirectiveAdapter getAdapterInstance(INodeNotifier target) {
// if our instance already exists with a different
// target, then, somehow, the document node must
// have changed for a model, so we should release
// old adapter and create new one for new document
// node. This is probably a programming error.
if (pageDirectiveAdapterInstance != null) {
if (target != pageDirectiveAdapterInstance.getTarget()) {
release();
pageDirectiveAdapterInstance = new PageDirectiveAdapterImpl(target);
}
// else return the one we have
}
else {
// if is equal to null, create a new one
pageDirectiveAdapterInstance = new PageDirectiveAdapterImpl(target);
}
Assert.isNotNull(pageDirectiveAdapterInstance, "pageDipageDirectiveAdapterInstance was null"); //$NON-NLS-1$
return pageDirectiveAdapterInstance;
}
public INodeAdapterFactory copy() {
return new PageDirectiveAdapterFactory(getAdapterKey(), isShouldRegisterAdapter());
}
}