saveupdatedfiletask.java

一个java写的business process management系统

/*
 * Copyright (c) 2003, 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.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

import net.orthanc.flow4j.runtime.AbstractTaskFlowlet;
import net.orthanc.flow4j.runtime.Flow4JRuntimeException;
import net.orthanc.flow4j.runtime.FlowDictionary;
import net.orthanc.flow4j.runtime.descriptors.TaskPropertyDescriptors;

import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.w3c.dom.Document;

/**
 * @author agreif
 *
 * Saves the updated DOM document to file
 */
public class SaveUpdatedFileTask extends AbstractTaskFlowlet {

	/**
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#getTaskName()
	 */
	public String getName() {
		return "SaveUpdatedFile";
	}


	/**
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#getDescription()
	 */
	public String getDescription() {
		return "Saves the updated DOM document to file";
	}


	/* 
	 * TODO
	 * @see net.orthanc.flow4j.runtime.ITaskFlowlet#getPropertyDescriptors()
	 */
	public TaskPropertyDescriptors getPropertyDescriptors() {
		return null;
	}



	/**
	 * Saves the updated DOM document to file
	 * @see net.orthanc.flow4j.runtime.IFlowlet#execute(net.orthanc.flow4j.runtime.FlowDictionary)
	 */
	public void execute(FlowDictionary dictionary) {
		Document document = (Document)dictionary.get(UpdateFlowFileConsts.KEY_DOM_DOC);
		File flowFile = (File)dictionary.get(UpdateFlowFileConsts.KEY_FLOW_FILE);

		OutputFormat format = new OutputFormat(document); //Serialize DOM
		format.setIndenting(true);
		Writer writer = null;
		try {
			writer = new BufferedWriter(new FileWriter(flowFile));
			XMLSerializer serial = new XMLSerializer(writer, format);
			serial.asDOMSerializer(); // As a DOM Serializer

			serial.serialize(document.getDocumentElement());
		} catch (IOException e) {
			throw new Flow4JRuntimeException("Could not serialize DOM docuemnt to file: " + flowFile, e);
		} finally {
			if (writer != null)
				try {
					writer.close();
				} catch (Exception e) {
				}
		}
	}

}