/*******************************************************************************
* Copyright (c) 2005 Oracle Corporation.
* 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:
* Ian Trimble - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dtmanager.converter.internal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.jst.pagedesigner.dtmanager.converter.ITagConverterContext;
import org.eclipse.jst.pagedesigner.dtmanager.converter.ITransformOperation;
import org.eclipse.jst.pagedesigner.dtmanager.converter.ITransformer;
import org.w3c.dom.Element;
/**
* Default ITransformer implementation.
*
* @author Ian Trimble - Oracle
*/
public class DefaultTransformer implements ITransformer {
private ITagConverterContext tagConverterContext;
// synchronization occurs on this object, so it must never
// be allowed to be null
private final Collection transformOperations = new ArrayList();
/**
* Instantiates an instance.
*
* @param context ITagConverterContext instance.
*/
public DefaultTransformer(ITagConverterContext context) {
this.tagConverterContext = context;
}
/*
* (non-Javadoc)
* @see org.eclipse.jst.pagedesigner.dtmanager.converter.ITransformer#appendTransformOperation(org.eclipse.jst.pagedesigner.dtmanager.converter.ITransformOperation)
*/
public void appendTransformOperation(ITransformOperation operation) {
synchronized(transformOperations) {
if (operation != null) {
operation.setTagConverterContext(tagConverterContext);
transformOperations.add(operation);
}
}
}
/*
* (non-Javadoc)
* @see org.eclipse.jst.pagedesigner.dtmanager.converter.internal.provisional.ITransformer#transform(org.w3c.dom.Element)
*/
public Element transform(Element srcElement) {
Element curElement = null;
if (srcElement != null) {
synchronized(transformOperations) {
if (transformOperations.size() > 0) {
curElement = srcElement;
Iterator itOperations = transformOperations.iterator();
while (itOperations.hasNext()) {
ITransformOperation operation = (ITransformOperation)itOperations.next();
curElement = operation.transform(srcElement, curElement);
}
}
}
}
return curElement;
}
}