v3tov4task.java

一个java写的business process management系统

/*
 * Copyright (c) 2003-2004, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.flows.updateflowfile;

import java.io.File;

import net.orthanc.flow4j.runtime.AbstractTaskFlowlet;
import net.orthanc.flow4j.runtime.FlowDictionary;
import net.orthanc.flow4j.runtime.descriptors.TaskParameterDescriptors;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

/**
 * Class V3ToV4Task TODO
 * @author greifa
 * 
 */
public class V3ToV4Task extends AbstractTaskFlowlet {

	/* 
	 * TODO
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#getName()
	 */
	public String getName() {
		// TODO Auto-generated method stub
		return "V3ToV4";
	}

	/* 
	 * TODO
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#getInputParameterDescriptors()
	 */
	public TaskParameterDescriptors getInputParameterDescriptors() {
		TaskParameterDescriptors d = new TaskParameterDescriptors();
		d.addParameterDescriptor(UpdateFlowFileConsts.KEY_DOM_DOC, Document.class, "the DOM document to update");
		
		return d;
	}

	/* 
	 * TODO
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#execute(net.orthanc.flow4j.runtime.FlowDictionary)
	 */
	public void execute(FlowDictionary dict) {
		Document document =
			(Document) dict.get(UpdateFlowFileConsts.KEY_DOM_DOC);
		File flowFile =
			(File) dict.get(UpdateFlowFileConsts.KEY_FLOW_FILE);

		updateDocument(document, flowFile);

	}


	/**
	 * Updates the document contents
	 * <ul>
	 * <li>add attribute flowname to root element</li>
	 * <li>change name of root element to flowmodel</li>
	 * </ul>
	 * @param document
	 */
	private void updateDocument(Document document, File flowFile) {
		//	get root elem
		Element docElem = document.getDocumentElement();
		Element  taskflowletsElem = (Element)docElem.getElementsByTagName("taskflowlets").item(0);
		NodeList taskflowlets = taskflowletsElem.getElementsByTagName("taskflowlet");
		//	iterate over task flowlets
		for (int i = 0; i < taskflowlets.getLength(); i++) {
			Element taskFlowletElem = (Element)taskflowlets.item(i);
			//	get taskproperties elem
			Element propertiesElem = (Element)taskFlowletElem.getElementsByTagName("taskproperties").item(0);
			if (propertiesElem == null)
				continue;
			propertiesElem = UpdateFlowFileUtils.renameElement(document, propertiesElem, "properties");
			NodeList properties = propertiesElem.getElementsByTagName("taskproperty");
			Element[] elemArray = new Element[properties.getLength()];
			//	iterate over taskproperty elems
			//	put the into temorary array
			for (int j = 0; j < properties.getLength(); j++) {
				elemArray[j] = (Element)properties.item(j);
			}
			//	rename them
			for(int j = 0; j < elemArray.length; j++) {
				UpdateFlowFileUtils.renameElement(document, elemArray[j], "property");
			}
		}
	}


}