/*
* 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.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.util.Map;
import org.directwebremoting.ConversionException;
import org.directwebremoting.extend.PlainProperty;
import org.directwebremoting.extend.Property;
import org.directwebremoting.extend.PropertyDescriptorProperty;
/**
* A special case of BeanConverter that doesn't convert StackTraces
* @author Joe Walker [joe at getahead dot ltd dot uk]
*/
public class ExceptionConverter extends BeanConverter
{
/* (non-Javadoc)
* @see org.directwebremoting.convert.BasicBeanConverter#getPropertyDescriptors(java.lang.Class, boolean, boolean)
*/
@Override
public Map<String, Property> getPropertyMapFromClass(Class<?> type, boolean readRequired, boolean writeRequired) throws ConversionException
{
Map<String, Property> descriptors = super.getPropertyMapFromClass(type, readRequired, writeRequired);
descriptors.put("javaClassName", new PlainProperty("javaClassName", type.getName()));
// Make sure Throwable's standard properties are added
// (fix for Bean Introspector peculiarities)
try
{
fixMissingThrowableProperty(descriptors, "message", "getMessage");
fixMissingThrowableProperty(descriptors, "cause", "getCause");
}
catch (IntrospectionException ex)
{
throw new ConversionException(type, ex);
}
return descriptors;
}
/**
* Make sure Throwable's standard properties are added
* (fix for Bean Introspector peculiarities)
* @param descriptors The Map of the known descriptors
* @param name The name of the property to add
* @param readMethodName A method name to use when getting said property
* @throws IntrospectionException If we fail to build a PropertyDescriptor
*/
protected void fixMissingThrowableProperty(Map<String, Property> descriptors, String name, String readMethodName) throws IntrospectionException
{
if (!descriptors.containsKey(name) && isAllowedByIncludeExcludeRules(name))
{
PropertyDescriptor descriptor = new PropertyDescriptor(name, Throwable.class, readMethodName, null);
descriptors.put(name, new PropertyDescriptorProperty(descriptor));
}
}
}