flowmodelconverter.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.model.bind.converters;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.orthanc.flow4j.base.Util;
import net.orthanc.flow4j.model.bind.FlowModelBind;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

/**
 * @author greifa
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FlowModelConverter implements Converter {

	/* (non-Javadoc)
	 * @see com.thoughtworks.xstream.converters.Converter#canConvert(java.lang.Class)
	 */
	public boolean canConvert(Class type) {
		return FlowModelBind.class.isAssignableFrom(type);
	}

	/* (non-Javadoc)
	 * @see com.thoughtworks.xstream.converters.Converter#marshal(java.lang.Object, com.thoughtworks.xstream.io.HierarchicalStreamWriter, com.thoughtworks.xstream.converters.MarshallingContext)
	 */
	public void marshal(
		Object source,
		HierarchicalStreamWriter writer,
		MarshallingContext context) {
		FlowModelBind bind = (FlowModelBind) source;
		writer.addAttribute("version", "" + bind.getVersion());
		writer.addAttribute("flowname", Util.escapeXml(bind.getFlowName()));
		marshalCollection(
			writer,
			context,
			"startflowlets",
			bind.getStartFlowlets());
		marshalCollection(
			writer,
			context,
			"javataskflowlets",
			bind.getJavaTaskFlowlets());
		marshalCollection(
			writer,
			context,
			"scripttaskflowlets",
			bind.getScriptTaskFlowlets());
		marshalCollection(
			writer,
			context,
			"decisionflowlets",
			bind.getDecisionFlowlets());
		marshalCollection(
			writer,
			context,
			"joinflowlets",
			bind.getJoinFlowlets());
		marshalCollection(
			writer,
			context,
			"callflowlets",
			bind.getCallFlowlets());
		marshalCollection(
			writer,
			context,
			"jumpflowlets",
			bind.getJumpFlowlets());
		marshalCollection(
			writer,
			context,
			"templateflowlets",
			bind.getTemplateFlowlets());
		marshalCollection(
			writer,
			context,
			"endflowlets",
			bind.getEndFlowlets());

		//	connections
		writer.startNode("connections");
		marshalCollection(
			writer,
			context,
			"transitions",
			bind.getTransitions());
		marshalCollection(
			writer,
			context,
			"booleantransitions",
			bind.getBooleanTransitions());

		writer.endNode();
	}

	protected static void marshalCollection(
		HierarchicalStreamWriter writer,
		MarshallingContext context,
		String elementName,
		List collection) {
		writer.startNode(elementName);
		if (collection != null)
			for (Iterator iter = collection.iterator(); iter.hasNext();) {
				context.convertAnother(iter.next());
			}
		writer.endNode();
	}

	/* (non-Javadoc)
	 * @see com.thoughtworks.xstream.converters.Converter#unmarshal(com.thoughtworks.xstream.io.HierarchicalStreamReader, com.thoughtworks.xstream.converters.UnmarshallingContext)
	 */
	public Object unmarshal(
		HierarchicalStreamReader reader,
		UnmarshallingContext context) {
		FlowModelBind flowModel = new FlowModelBind();
		flowModel.setVersion(Integer.parseInt(reader.getAttribute("version")));
		flowModel.setFlowName(reader.getAttribute("flowname"));
		String nodeName;
		while (reader.hasMoreChildren()) {
			reader.moveDown();
			nodeName = reader.getNodeName();
			if ("startflowlets".equals(nodeName))
				flowModel.setStartFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("javataskflowlets".equals(nodeName))
				flowModel.setJavaTaskFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("scripttaskflowlets".equals(nodeName))
				flowModel.setScriptTaskFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("decisionflowlets".equals(nodeName))
				flowModel.setDecisionFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("joinflowlets".equals(nodeName))
				flowModel.setJoinFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("callflowlets".equals(nodeName))
				flowModel.setCallFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("jumpflowlets".equals(nodeName))
				flowModel.setJumpFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("templateflowlets".equals(nodeName))
				flowModel.setTemplateFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("endflowlets".equals(nodeName))
				flowModel.setEndFlowlets(
					(List) context.convertAnother(null, ArrayList.class));
			else if ("connections".equals(nodeName)) {
				reader.moveDown();
				while (reader.hasMoreChildren()) {
					nodeName = reader.getNodeName();
					if ("transitions".equals(nodeName))
						flowModel.setTransitions(
							(List) context.convertAnother(
								null,
								ArrayList.class));
				}
				reader.moveUp();
				reader.moveDown();
				while (reader.hasMoreChildren()) {
					nodeName = reader.getNodeName();
					if ("booleantransitions".equals(nodeName))
						flowModel.setBooleanTransitions(
							(List) context.convertAnother(
								null,
								ArrayList.class));
				}
				reader.moveUp();
			}
			reader.moveUp();
		}
		return flowModel;
	}

}