/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.web.util;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import com.sun.xml.bind.marshaller.NamespacePrefixMapper;
/**
*
*/
@Provider
public class JAXBMarshallerResolver implements ContextResolver<Marshaller> {
private JAXBContextResolver contextResolver;
public JAXBMarshallerResolver() throws Exception {
contextResolver = new JAXBContextResolver();
}
public Marshaller getContext(Class<?> aClass) {
try {
JAXBContext context = contextResolver.getContext();
Marshaller marshaller = context.createMarshaller();
NamespacePrefixMapper namespaceMapper = new NamespacePrefixMapper() {
/**
* Returns a preferred prefix for the given namespace URI.
*
* This method is intended to be overrided by a derived class.
*
* @param namespaceUri
* The namespace URI for which the prefix needs to be found.
* Never be null. "" is used to denote the default namespace.
* @param suggestion
* When the content tree has a suggestion for the prefix
* to the given namespaceUri, that suggestion is passed as a
* parameter. Typically this value comes from QName.getPrefix()
* to show the preference of the content tree. This parameter
* may be null, and this parameter may represent an already
* occupied prefix.
* @param requirePrefix
* If this method is expected to return non-empty prefix.
* When this flag is true, it means that the given namespace URI
* cannot be set as the default namespace.
*
* @return
* null if there's no preferred prefix for the namespace URI.
* In this case, the system will generate a prefix for you.
*
* Otherwise the system will try to use the returned prefix,
* but generally there's no guarantee if the prefix will be
* actually used or not.
*
* return "" to map this namespace URI to the default namespace.
* Again, there's no guarantee that this preference will be
* honored.
*
* If this method returns "" when requirePrefix=true, the return
* value will be ignored and the system will generate one.
*/
@Override
public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
if (namespaceUri.equals("http://camel.apache.org/schema/web")) {
return "w";
} else if (namespaceUri.equals("http://camel.apache.org/schema/spring")) {
if (requirePrefix) {
return "c";
}
return "";
} else {
return suggestion;
}
}
};
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", namespaceMapper);
return marshaller;
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
}