/**
* 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.cxf.jaxrs.provider;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.WeakHashMap;
import javax.ws.rs.ConsumeMime;
import javax.ws.rs.ProduceMime;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.codehaus.jettison.mapped.MappedXMLInputFactory;
import org.codehaus.jettison.mapped.MappedXMLOutputFactory;
@ProduceMime("application/json")
@ConsumeMime("application/json")
@Provider
public final class JSONProvider
implements MessageBodyReader<Object>, MessageBodyWriter<Object> {
static Map<Class, JAXBContext> jaxbContexts = new WeakHashMap<Class, JAXBContext>();
public boolean isWriteable(Class<?> type) {
return type.getAnnotation(XmlRootElement.class) != null;
}
public boolean isReadable(Class<?> type) {
return type.getAnnotation(XmlRootElement.class) != null;
}
public long getSize(Object o) {
return -1;
}
public Object readFrom(Class<Object> type, MediaType m, MultivaluedMap<String, String> headers,
InputStream is) {
try {
JAXBContext context = getJAXBContext(type);
Unmarshaller unmarshaller = context.createUnmarshaller();
Map<String, String> nstojns = new HashMap<String, String>();
MappedXMLInputFactory factory = new MappedXMLInputFactory(nstojns);
XMLStreamReader xsw = factory.createXMLStreamReader(is);
Object obj = unmarshaller.unmarshal(xsw);
xsw.close();
return obj;
} catch (JAXBException e) {
e.printStackTrace();
} catch (XMLStreamException e) {
e.printStackTrace();
}
return null;
}
public void writeTo(Object obj, MediaType m, MultivaluedMap<String, Object> headers, OutputStream os) {
try {
JAXBContext context = getJAXBContext(obj.getClass());
Marshaller marshaller = context.createMarshaller();
//marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
// Set up the JSON StAX implementation
Map<String, String> nstojns = new HashMap<String, String>();
XMLOutputFactory factory = new MappedXMLOutputFactory(nstojns);
XMLStreamWriter xsw = factory.createXMLStreamWriter(os);
marshaller.marshal(obj, xsw);
xsw.close();
} catch (JAXBException e) {
e.printStackTrace();
} catch (XMLStreamException e) {
e.printStackTrace();
}
}
private JAXBContext getJAXBContext(Class type) throws JAXBException {
synchronized (jaxbContexts) {
JAXBContext context = jaxbContexts.get(type);
if (context == null) {
context = JAXBContext.newInstance(type);
jaxbContexts.put(type, context);
}
return context;
}
}
}