transitionconverter.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.List;

import net.orthanc.flow4j.model.bind.TransitionBind;
import net.orthanc.flow4j.model.bind.TransitionSourceFlowletBind;
import net.orthanc.flow4j.model.bind.TransitionTargetFlowletBind;

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 TransitionConverter implements Converter {

	/* (non-Javadoc)
	 * @see com.thoughtworks.xstream.converters.Converter#canConvert(java.lang.Class)
	 */
	public boolean canConvert(Class type) {
		return TransitionBind.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) {
		writer.startNode(getTransitionElementName());

		marshalBody(source, writer, context);

		writer.endNode();
	}

	protected String getTransitionElementName() {
		return "transition";
	}

	protected void marshalBody(
		Object source,
		HierarchicalStreamWriter writer,
		MarshallingContext context) {
		TransitionBind transition = (TransitionBind) source;
		context.convertAnother(transition.getSourceFlowlet());
		context.convertAnother(transition.getTargetFlowlet());
		
		FlowModelConverter.marshalCollection(writer, context, "bendpoints", transition.getBendpoints());
	}

	/* (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) {
		TransitionBind transition = getNewTransitionBind();

		unmarshalBody(transition, reader, context);

		return transition;
	}

	protected TransitionBind getNewTransitionBind() {
		return new TransitionBind();
	}

	protected void unmarshalBody(
		TransitionBind transition,
		HierarchicalStreamReader reader,
		UnmarshallingContext context) {
		reader.moveDown();

		transition.setSourceFlowlet(
			(TransitionSourceFlowletBind) context.convertAnother(
				null,
				TransitionSourceFlowletBind.class));

		reader.moveUp();
		reader.moveDown();

		transition.setTargetFlowlet(
			(TransitionTargetFlowletBind) context.convertAnother(
				null,
				TransitionTargetFlowletBind.class));

		reader.moveUp();
		
		//	bendpoints
		reader.moveDown();
		transition.setBendpoints(
			(List) context.convertAnother(
				null,
				ArrayList.class));

		reader.moveUp();
	}

}