| /******************************************************************************* |
| * 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()); |
| } |
| } |