| /******************************************************************************* |
| * Copyright (c) 2001, 2004 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 |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.core.internal.propagate; |
| |
| |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.wst.sse.core.internal.PropagatingAdapter; |
| 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.Document; |
| import org.w3c.dom.DocumentType; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| |
| public class PropagatingAdapterImpl implements PropagatingAdapter { |
| |
| public static final Class PropagatingAdapterClass = PropagatingAdapter.class; |
| // because so many of these are created in huge file, |
| // Jeffrey Liu suggested these be done lazily, since not all |
| // models and not all nodes actually have a list of factories. |
| private List adaptOnCreateFactories = null; |
| |
| /** |
| * AbstractPropagatingAdapterImpl constructor comment. |
| */ |
| public PropagatingAdapterImpl() { |
| super(); |
| } |
| |
| protected void adaptOnCreate(IDOMNode node) { |
| // give each of the factories a chance to adapt the node, if it |
| // chooses to |
| if (adaptOnCreateFactories != null) { |
| Iterator iterator = adaptOnCreateFactories.iterator(); |
| while (iterator.hasNext()) { |
| INodeAdapterFactory factory = (INodeAdapterFactory) iterator.next(); |
| factory.adapt(node); |
| } |
| } |
| |
| } |
| |
| /** |
| * This mechanism can be made "easier to use" later. |
| */ |
| public void addAdaptOnCreateFactory(INodeAdapterFactory factory) { |
| //adaptOnCreateFactories.add(factory); |
| getAdaptOnCreateFactories().add(factory); |
| } |
| |
| /** |
| * Gets the adaptOnCreateFactories. |
| * |
| * @return Returns a List |
| */ |
| public List getAdaptOnCreateFactories() { |
| if (adaptOnCreateFactories == null) |
| adaptOnCreateFactories = new ArrayList(); |
| return adaptOnCreateFactories; |
| } |
| |
| // protected void unadaptOnRemove(INodeNotifier node) { |
| // // give each of the factories a chance to process remove event |
| // // This is a bit out of the normal adapter pattern, but I couldn't |
| // // think of a better way to "remove" pageDirectiveWatchers, if and |
| // // when the page directive was 'removed' (edited). |
| // // |
| // Iterator iterator = adaptOnCreateFactories.iterator(); |
| // while (iterator.hasNext()) { |
| // IAdapterFactory factory = (IAdapterFactory) iterator.next(); |
| // if (factory instanceof PropagatingAdapterFactory) { |
| // ((PropagatingAdapterFactory)factory).unadapt(node); |
| // } |
| // } |
| // |
| // } |
| |
| /** |
| * @see PropagatingAdapter#initializeForFactory(INodeAdapterFactory, |
| * INodeNotifier) |
| */ |
| public void initializeForFactory(INodeAdapterFactory factory, INodeNotifier node) { |
| // we're DOM specific implimentation |
| if (node instanceof IDOMNode) { |
| IDOMNode xmlNode = (IDOMNode) node; |
| propagateTo(xmlNode); |
| } |
| } |
| |
| /** |
| * Allowing the INodeAdapter to compare itself against the type allows it |
| * to return true in more than one case. |
| */ |
| public boolean isAdapterForType(Object type) { |
| return type.equals(PropagatingAdapterClass); |
| } |
| |
| protected boolean isInteresting(Object newValue) { |
| return (newValue != null && (newValue instanceof Element || newValue instanceof Document || newValue instanceof DocumentType)); |
| } |
| |
| /** |
| */ |
| public void notifyChanged(INodeNotifier notifier, int eventType, Object changedFeature, Object oldValue, Object newValue, int pos) { |
| // DMW, 2002.8.10. I changed this so we only propagate to Elements ... |
| // not attributes too! |
| // I'm assuming this will help performance and memory, but don't know |
| // if anyone was depending on |
| // this being proagate to attributes. |
| if (eventType == INodeNotifier.ADD && isInteresting(newValue)) { |
| propagateTo((IDOMNode) newValue); |
| } |
| // else if (eventType == INodeNotifier.CONTENT_CHANGED) { |
| // notifier.getAdapterFor(PropagatingAdapterClass); |
| // } |
| // else if (eventType == INodeNotifier.CHANGE) { |
| // } |
| // else if (eventType == INodeNotifier.REMOVE && |
| // isInteresting(oldValue)) { |
| // unadaptOnRemove((XMLNode)oldValue); |
| // } |
| // else if (eventType == INodeNotifier.STRUCTURE_CHANGED) { |
| // } |
| } |
| |
| protected void propagateTo(IDOMNode node) { |
| // get adapter to ensure its created |
| node.getAdapterFor(PropagatingAdapterClass); |
| adaptOnCreate(node); |
| propagateToChildren(node); |
| } |
| |
| protected void propagateToChildren(IDOMNode parent) { |
| for (Node child = parent.getFirstChild(); child != null; child = child.getNextSibling()) { |
| propagateTo((IDOMNode) child); |
| } |
| } |
| |
| /** |
| * @see PropagatingAdapter#release() |
| */ |
| public void release() { |
| if (adaptOnCreateFactories != null) { |
| Iterator iterator = adaptOnCreateFactories.iterator(); |
| while (iterator.hasNext()) { |
| INodeAdapterFactory factory = (INodeAdapterFactory) iterator.next(); |
| factory.release(); |
| } |
| } |
| } |
| |
| } |