constructorconverter.java

Ajax 框架,可以用来做数型菜单或者联动下拉列表

/*
 * Copyright 2005 Joe Walker
 *
 * Licensed 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.directwebremoting.convert;

import java.lang.reflect.Constructor;

import org.directwebremoting.Converter;
import org.directwebremoting.InboundContext;
import org.directwebremoting.InboundVariable;
import org.directwebremoting.OutboundContext;
import org.directwebremoting.OutboundVariable;
import org.directwebremoting.util.JavascriptUtil;

/**
 * An implementation of Converter for anything with a string constructor.
 * @author Joe Walker [joe at eireneh dot com]
 * @version $Id: ConstructorConverter.java,v 1.2 2004/11/04 15:54:07 joe_walker Exp $
 */
public class ConstructorConverter extends BaseV20Converter implements Converter
{
    /* (non-Javadoc)
     * @see org.directwebremoting.Converter#convertInbound(java.lang.Class, org.directwebremoting.InboundVariable, org.directwebremoting.InboundContext)
     */
    public Object convertInbound(Class paramType, InboundVariable iv, InboundContext inctx)
    {
        try
        {
            Constructor converter = paramType.getConstructor(new Class[] { String.class });
            return converter.newInstance(new Object[] { iv.getValue() });
        }
        catch (Exception ex)
        {
            throw new IllegalArgumentException(ex.toString());
        }
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.Converter#convertOutbound(java.lang.Object, org.directwebremoting.OutboundContext)
     */
    public OutboundVariable convertOutbound(Object data, OutboundContext outctx)
    {
        return new OutboundVariable("", '\'' + JavascriptUtil.escapeJavaScript(data.toString()) + '\''); //$NON-NLS-1$
    }
}