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/*******************************************************************************
* Copyright (c) 2001, 2005 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.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 {
private List adaptOnCreateFactories = null;
/**
* AbstractPropagatingAdapterImpl constructor comment.
*/
public PropagatingAdapterImpl() {
super();
}
private void adaptOnCreate(IDOMNode node) {
// give each of the factories a chance to adapt the node, if it
// chooses to
if (adaptOnCreateFactories != null) {
synchronized (adaptOnCreateFactories) {
int length = adaptOnCreateFactories.size();
for (int i = 0; i < length; i++) {
INodeAdapterFactory factory = (INodeAdapterFactory) adaptOnCreateFactories.get(i);
factory.adapt(node);
}
}
}
}
/**
* This mechanism can be made "easier to use" later.
*/
public void addAdaptOnCreateFactory(INodeAdapterFactory factory) {
getAdaptOnCreateFactories().add(factory);
}
/**
* Gets the adaptOnCreateFactories.
*
* @return Returns a List
*/
public List getAdaptOnCreateFactories() {
if (adaptOnCreateFactories == null)
adaptOnCreateFactories = new ArrayList();
return adaptOnCreateFactories;
}
/**
* @see PropagatingAdapter#initializeForFactory(INodeAdapterFactory,
* INodeNotifier)
*/
public void initializeForFactory(INodeAdapterFactory factory, INodeNotifier node) {
// ISSUE: we are a DOM specific implimentation,
// we should not be.
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(PropagatingAdapter.class);
}
private 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) {
// Issue: We only propagate to Elements ...
// not attributes too! We should careful consider doning all when
// when we improve "adapt on create" design.
if (eventType == INodeNotifier.ADD && isInteresting(newValue)) {
propagateTo((IDOMNode) newValue);
}
}
private void propagateTo(IDOMNode node) {
// get adapter to ensure its created
node.getAdapterFor(PropagatingAdapter.class);
adaptOnCreate(node);
propagateToChildren(node);
}
private 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) {
synchronized (adaptOnCreateFactories) {
int length = adaptOnCreateFactories.size();
for (int i = 0; i < length; i++) {
INodeAdapterFactory factory = (INodeAdapterFactory) adaptOnCreateFactories.get(i);
factory.release();
}
}
}
}
}
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