minimalistexceptionconverter.java

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/*
 * 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.util.HashMap;
import java.util.Map;

import org.directwebremoting.extend.MarshallException;

/**
 * A special case of BeanConverter for use by default with {@link Throwable}s,
 * which only outputs a "broken" message.
 * <p>In other words, by default the user doesn't get to learn anything about
 * failures on the server.
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class MinimalistExceptionConverter extends BeanConverter
{
    /* (non-Javadoc)
     * @see org.directwebremoting.convert.BasicBeanConverter#getPropertyDescriptors(java.lang.Class, boolean, boolean)
     */
    public Map getPropertyMapFromClass(Class type, boolean readRequired, boolean writeRequired) throws MarshallException
    {
        Map descriptors = new HashMap();

        descriptors.put("message", new PlainProperty("message", "Error"));
        descriptors.put("javaClassName", new PlainProperty("javaClassName", "java.lang.Throwable"));

        return descriptors;
    }
}