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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.oxm.xstream;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

/**
 * XStream {@link Converter} that supports all classes, but throws exceptions for
 * (un)marshalling.
 *
 * 

The main purpose of this class is to * {@linkplain com.thoughtworks.xstream.XStream#registerConverter(com.thoughtworks.xstream.converters.Converter, int) register} * this converter as a catch-all last converter with a * {@linkplain com.thoughtworks.xstream.XStream#PRIORITY_NORMAL normal} * or higher priority, in addition to converters that explicitly handle the domain * classes that should be supported. As a result, default XStream converters with * lower priorities and possible security vulnerabilities do not get invoked. * *

For instance: *

 * XStreamMarshaller unmarshaller = new XStreamMarshaller();
 * unmarshaller.getXStream().registerConverter(new MyDomainClassConverter(), XStream.PRIORITY_VERY_HIGH);
 * unmarshaller.getXStream().registerConverter(new CatchAllConverter(), XStream.PRIORITY_NORMAL);
 * MyDomainClass myObject = unmarshaller.unmarshal(source);
 * 
* * @author Arjen Poutsma * @since 3.2.5 */ public class CatchAllConverter implements Converter { @Override @SuppressWarnings("rawtypes") public boolean canConvert(Class type) { return true; } @Override public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) { throw new UnsupportedOperationException("Marshalling not supported"); } @Override public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) { throw new UnsupportedOperationException("Unmarshalling not supported"); } }




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