RELEASE_2_1_13/src/blocks/portal/java/org/apache/cocoon/portal/util/CopletInstanceDataReferenceFieldHandler.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.cocoon.portal.util;

import org.apache.cocoon.portal.coplet.CopletInstanceData;
import org.apache.cocoon.portal.layout.impl.CopletLayout;

/**
 * Field handler for external CopletInstanceData references.
 *
 * @author <a href="mailto:bluetkemeier@s-und-n.de">Bj&ouml;rn L&uuml;tkemeier</a>
 * 
 * @version CVS $Id$
 */
public class CopletInstanceDataReferenceFieldHandler
extends ReferenceFieldHandler {

	public Object getValue(Object object) {
		CopletInstanceData copletInstanceData = ((CopletLayout)object).getCopletInstanceData();
		if (copletInstanceData != null) {
			return copletInstanceData.getId();
		}
        return null;
	}

	public Object newInstance(Object parent) {
		return new CopletInstanceData();
	}

	public void resetValue(Object object) {
		((CopletLayout)object).setCopletInstanceData(null);
	}

	public void setValue(Object object, Object value) {
		CopletInstanceData copletInstanceData = (CopletInstanceData)getObjectMap().get(value);
		if (copletInstanceData == null) {
			throw new ProfileException(
                    "Referenced Coplet Instance Data "+value+" does not exist.");
        }
		((CopletLayout)object).setCopletInstanceData(copletInstanceData);
	}
}