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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.jersey.core.provider.jaxb;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.nio.charset.Charset;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.Providers;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.UnmarshalException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.transform.stream.StreamSource;
/**
* An abstract provider for JAXB types that are annotated with
* {@link XmlRootElement} or {@link XmlType}.
* <p>
* Implementing classes may extend this class to provide specific marshalling
* and unmarshalling behaviour.
* <p>
* When unmarshalling a {@link UnmarshalException} will result in a
* {@link WebApplicationException} being thrown with a status of 400
* (Client error), and a {@link JAXBException} will result in a
* {@link WebApplicationException} being thrown with a status of 500
* (Internal Server error).
* <p>
* When marshalling a {@link JAXBException} will result in a
* {@link WebApplicationException} being thrown with a status of 500
* (Internal Server error).
*
* @author Paul.Sandoz@Sun.Com
*/
public abstract class AbstractRootElementProvider extends AbstractJAXBProvider<Object> {
public AbstractRootElementProvider(Providers ps) {
super(ps);
}
public AbstractRootElementProvider(Providers ps, MediaType mt) {
super(ps, mt);
}
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation annotations[], MediaType mediaType) {
return (type.getAnnotation(XmlRootElement.class) != null ||
type.getAnnotation(XmlType.class) != null) && isSupported(mediaType);
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation annotations[], MediaType mediaType) {
return type.getAnnotation(XmlRootElement.class) != null && isSupported(mediaType);
}
@Override
public final Object readFrom(
Class<Object> type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException {
try {
return readFrom(type, mediaType, getUnmarshaller(type, mediaType), entityStream);
} catch (UnmarshalException ex) {
throw new WebApplicationException(ex, Status.BAD_REQUEST);
} catch (JAXBException ex) {
throw new WebApplicationException(ex, Status.INTERNAL_SERVER_ERROR);
}
}
/**
* Unmarshal a JAXB type.
* <p>
* Implementing classes may override this method.
*
* @param type the JAXB type
* @param mediaType the media type
* @param u the unmarshaller to use for unmarshalling.
* @param entityStream the input stream to unmarshal from.
* @return an instance of the JAXB type.
* @throws javax.xml.bind.JAXBException
* @throws java.io.IOException
*/
protected Object readFrom(Class<Object> type, MediaType mediaType,
Unmarshaller u, InputStream entityStream)
throws JAXBException {
if (type.isAnnotationPresent(XmlRootElement.class))
return u.unmarshal(entityStream);
else
return u.unmarshal(new StreamSource(entityStream), type).getValue();
}
@Override
public final void writeTo(
Object t,
Class<?> type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException {
try {
final Marshaller m = getMarshaller(type, mediaType);
final Charset c = getCharset(mediaType);
if (c != UTF8) {
m.setProperty(Marshaller.JAXB_ENCODING, c.name());
}
setHeader(m, annotations);
writeTo(t, mediaType, c, m, entityStream);
} catch (JAXBException ex) {
throw new WebApplicationException(ex, Status.INTERNAL_SERVER_ERROR);
}
}
/**
* Marshal an instance of a JAXB type.
* <p>
* Implementing classes may override this method.
*
* @param t the instance of the JAXB type.
* @param mediaType the meida type.
* @param c the character set to serialize characters to.
* @param m the marshaller to marshaller the instance of the JAXB type.
* @param entityStream the output stream to marshal to.
* @throws javax.xml.bind.JAXBException
* @throws java.io.IOException
*/
protected void writeTo(Object t, MediaType mediaType, Charset c,
Marshaller m, OutputStream entityStream)
throws JAXBException {
m.marshal(t, entityStream);
}
}
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