/*
* 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.
*/
/*
* $Id: AssignConverterCommand.java 464373 2006-10-16 04:21:54Z rahul $
*/
package org.apache.shale.clay.component.chain;
import javax.faces.component.UIComponent;
import javax.faces.component.ValueHolder;
import org.apache.commons.chain.Catalog;
import org.apache.commons.chain.Command;
import org.apache.commons.chain.Context;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.shale.clay.config.Globals;
import org.apache.shale.clay.config.beans.ComponentBean;
/**
* <p>
* Determines if the {@link ComponentBean} has a {@link org.apache.shale.clay.config.beans.ConverterBean} assigned.
* A <code>Converter</code> is created by invoking the
* {@link org.apache.shale.clay.component.chain.CreateConverterCommand}.
* </p>
*/
public class AssignConverterCommand extends AbstractCommand {
/**
* <p>
* Common Logging utility.
* </p>
*/
private static Log log;
static {
log = LogFactory.getLog(AssignConverterCommand.class);
}
/**
* <p>
* Checks to see if the {@link org.apache.shale.clay.config.beans.ComponentBean}
* has a {@link org.apache.shale.clay.config.beans.ConverterBean}
* assigned. The <code>Globals.ADD_CONVERTER_COMMAND_NAME</code> is
* invoked to create a <code>Converter</code>.
*
* @param context common chains
* @return <code>true</code> if the chain is complete
* @exception Exception propagated up to the top of the chain
*/
public boolean execute(Context context) throws Exception {
boolean isFinal = false;
ClayContext clayContext = (ClayContext) context;
if (clayContext == null) {
throw new NullPointerException(getMessages()
.getMessage("clay.null.clayContext"));
}
UIComponent child = (UIComponent) clayContext.getChild();
if (child == null) {
throw new NullPointerException(getMessages()
.getMessage("clay.null.childComponent"));
}
ComponentBean displayElement = clayContext.getDisplayElement();
if (displayElement == null) {
throw new NullPointerException(getMessages()
.getMessage("clay.null.componentBean"));
}
if (displayElement.getConverter() != null) {
if (child instanceof ValueHolder) {
ClayContext subContext = (ClayContext) clayContext.clone();
subContext.setDisplayElement(displayElement.getConverter());
subContext.setParent(child);
Catalog catalog = getCatalog();
Command command = catalog
.getCommand(Globals.ADD_CONVERTER_COMMAND_NAME);
command.execute(subContext);
} else {
log.error(getMessages().getMessage("assign.converter.error",
new Object[] { displayElement }));
}
}
return isFinal;
}
}