spring CatchAllConverter 源码
spring CatchAllConverter 代码
文件路径：/spring-oxm/src/main/java/org/springframework/oxm/xstream/CatchAllConverter.java
/*
* 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.
*
* <p>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.
*
* <p>For instance:
* <pre class="code">
* 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);
* </pre>
*
* @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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