/*******************************************************************************
* 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.Iterator;
import org.eclipse.emf.common.util.EList;
import org.eclipse.jst.pagedesigner.dtmanager.DTManager;
import org.eclipse.jst.pagedesigner.dtmanager.IDTInfo;
import org.eclipse.jst.pagedesigner.dtmanager.converter.IOutputRenderer;
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.eclipse.jst.pagedesigner.dtmanager.converter.operations.TransformOperationFactory;
import org.eclipse.jst.pagedesigner.dtmanager.dtinfo.Operation;
import org.eclipse.jst.pagedesigner.dtmanager.dtinfo.Parameter;
import org.eclipse.jst.pagedesigner.dtmanager.dtinfo.TagConvertInfo;
import org.w3c.dom.Element;
/**
* Design-time metadata-driven HTML IOutputRenderer implementation.
*
* @author Ian Trimble - Oracle
*/
public class DTHTMLOutputRenderer implements IOutputRenderer {
private ITagConverterContext tagConverterContext;
/*
* (non-Javadoc)
* @see org.eclipse.jst.pagedesigner.dtmanager.converter.IOutputRenderer#render(org.eclipse.jst.pagedesigner.dtmanager.converter.ITagConverterContext)
*/
public Element render(ITagConverterContext newTagConverterContext) {
this.tagConverterContext = newTagConverterContext;
Element srcElement = newTagConverterContext.getHostElement();
Element resultElement = null;
if (srcElement != null) {
ITransformer transformer = createTransformerFromDTInfo(srcElement);
if (transformer != null) {
resultElement = transformer.transform(srcElement);
}
}
return resultElement;
}
/**
* Configures and returns an ITransformer instance for the specified source
* Element.
*
* @param element Element for which to configure and return an ITransformer
* instance.
* @return Configured ITransformer instance for the specified Element.
*/
protected ITransformer createTransformerFromDTInfo(Element element) {
ITransformer transformer = null;
DTManager dtManager = DTManager.getInstance();
IDTInfo dtInfo = dtManager.getDTInfo(element);
if (dtInfo != null) {
TagConvertInfo tcInfo = dtInfo.getTagConvertInfo();
if (tcInfo != null) {
transformer = new DefaultTransformer(tagConverterContext);
EList operations = tcInfo.getOperations();
if (!appendOperationsToTransformer(transformer, operations, dtInfo)) {
transformer = null;
}
}
}
return transformer;
}
private boolean appendOperationsToTransformer(ITransformer transformer, EList operations, IDTInfo dtInfo) {
Iterator itOperations = operations.iterator();
while (itOperations.hasNext()) {
Operation operation = (Operation)itOperations.next();
ITransformOperation currentTransformOperation = null;
String opID = operation.getId();
String[] params = getParamsArray(operation);
currentTransformOperation =
TransformOperationFactory.getInstance().getTransformOperation(opID, params);
if (currentTransformOperation != null) {
transformer.appendTransformOperation(currentTransformOperation);
EList childOperations = operation.getOperations();
if (childOperations != null && childOperations.size() > 0) {
if (!appendChildOperations(currentTransformOperation, childOperations, dtInfo)) {
return false;
}
}
} else {
return false;
}
}
return true;
}
private boolean appendChildOperations(ITransformOperation parentOperation, EList operations, IDTInfo dtInfo) {
Iterator itOperations = operations.iterator();
while (itOperations.hasNext()) {
Operation operation = (Operation)itOperations.next();
ITransformOperation currentTransformOperation = null;
String opID = operation.getId();
String[] params = getParamsArray(operation);
currentTransformOperation =
TransformOperationFactory.getInstance().getTransformOperation(opID, params);
if (currentTransformOperation != null) {
parentOperation.appendChildOperation(currentTransformOperation);
EList childOperations = operation.getOperations();
if (childOperations != null && childOperations.size() > 0) {
if (!appendChildOperations(currentTransformOperation, childOperations, dtInfo)) {
return false;
}
}
} else {
return false;
}
}
return true;
}
private String[] getParamsArray(Operation operation) {
EList paramsList = operation.getParameters();
if (paramsList != null) {
Iterator itParamsList = paramsList.iterator();
String[] paramsArray = new String[paramsList.size()];
int index = 0;
while (itParamsList.hasNext()) {
Parameter param = (Parameter)itParamsList.next();
paramsArray[index++] = param.getValue();
}
return paramsArray;
}
//fall through - no params
return new String[0];
}
}