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* 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
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* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.wink.common.internal.providers.entity.xml;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
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.JAXBElement;
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.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.wink.common.internal.i18n.Messages;
import org.apache.wink.common.internal.utils.MediaTypeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Provider
@Consumes( {MediaType.TEXT_XML, MediaType.APPLICATION_XML, MediaType.WILDCARD})
@Produces( {MediaType.TEXT_XML, MediaType.APPLICATION_XML, MediaType.WILDCARD})
public class JAXBXmlProvider extends AbstractJAXBProvider implements MessageBodyReader<Object>,
MessageBodyWriter<Object> {
private static final Logger logger = LoggerFactory.getLogger(JAXBXmlProvider.class);
public boolean isReadable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return (isJAXBObject(type, genericType) || isCompatible(type, annotations)) && isSupportedMediaType(mediaType);
}
public Object readFrom(final Class<Object> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
final InputStream entityStream) throws IOException,
WebApplicationException {
Class<?> concreteType = getConcreteTypeFromTypeMap(type, annotations);
Unmarshaller unmarshaller = null;
Object unmarshaledResource = null;
XMLStreamReader xmlStreamReader = null;
try {
JAXBContext context = getContext(concreteType, mediaType);
unmarshaller = getJAXBUnmarshaller(concreteType, context, mediaType);
xmlStreamReader = getXMLStreamReader(entityStream);
if (concreteType.isAnnotationPresent(XmlRootElement.class)) {
unmarshaledResource = unmarshaller.unmarshal(xmlStreamReader);
closeXMLStreamReader(xmlStreamReader);
if (unmarshaledResource instanceof JAXBElement) {
// this can happen if the JAXBContext object used to create
// the unmarshaller
// was created using the package name string instead of a
// class object and the
// ObjectFactory has a creator method for the desired object
// that returns
// JAXBElement. But we know better; the 'type' param passed
// in here had the
// XmlRootElement on it, so we know the desired return
// object type is NOT
// JAXBElement, thus:
unmarshaledResource = ((JAXBElement)unmarshaledResource).getValue();
}
} else {
try {
final Unmarshaller _unmarshaller = unmarshaller;
final XMLStreamReader _xmlStreamReader = xmlStreamReader;
final Class<?> _concreteType = concreteType;
unmarshaledResource =
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws PrivilegedActionException {
try {
Object obj = _unmarshaller.unmarshal(_xmlStreamReader, _concreteType).getValue();
closeXMLStreamReader(_xmlStreamReader);
return obj;
} catch (JAXBException e) {
throw new PrivilegedActionException(e);
}
}
});
} catch (PrivilegedActionException e) {
closeXMLStreamReader(xmlStreamReader);
if (logger.isErrorEnabled()) {
logger
.error(Messages.getMessage("jaxbFailToUnmarshal", concreteType.getName()), e.getException()); //$NON-NLS-1$
}
throw new WebApplicationException(e.getException(), Response.Status.BAD_REQUEST);
}
}
releaseJAXBUnmarshaller(context, unmarshaller);
} catch (JAXBException e) {
closeXMLStreamReader(xmlStreamReader);
if (logger.isErrorEnabled()) {
logger.error(Messages.getMessage("jaxbFailToUnmarshal", concreteType.getName()), e); //$NON-NLS-1$
}
throw new WebApplicationException(e, Response.Status.BAD_REQUEST);
} catch (EntityReferenceXMLStreamException e) {
closeXMLStreamReader(xmlStreamReader);
if (logger.isErrorEnabled()) {
logger.error(Messages.getMessage("entityRefsNotSupported")); //$NON-NLS-1$
}
throw new WebApplicationException(e, Response.Status.BAD_REQUEST);
} catch (XMLStreamException e) {
closeXMLStreamReader(xmlStreamReader);
throw new WebApplicationException(e, Response.Status.BAD_REQUEST);
} catch (RuntimeException e) {
closeXMLStreamReader(xmlStreamReader);
throw e;
}
return unmarshalWithXmlAdapter(unmarshaledResource, type, type, annotations);
}
public long getSize(Object t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return -1;
}
public boolean isWriteable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return (isJAXBObject(type, genericType) || isCompatible(type, annotations)) && isSupportedMediaType(mediaType);
}
public void writeTo(Object t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException, WebApplicationException {
t = marshalWithXmlAdapter(t, type, genericType, annotations);
Class<?> concreteType = getConcreteTypeFromTypeMap(type, annotations);
mediaType = MediaTypeUtils.setDefaultCharsetOnMediaTypeHeader(httpHeaders, mediaType);
try {
if (isJAXBObject(concreteType)) {
JAXBContext context = getContext(concreteType, genericType, mediaType);
if(logger.isTraceEnabled()) {
logger.trace("using context {}@{} to get marshaller", context.getClass().getName(), System.identityHashCode(context)); //$NON-NLS-1$
}
Marshaller marshaller = getJAXBMarshaller(concreteType, context, mediaType);
Object entityToMarshal = getEntityToMarshal(t, concreteType);
// Use an OutputStream directly instead of a Writer for
// performance.
marshaller.marshal(entityToMarshal, entityStream);
releaseJAXBMarshaller(context, marshaller);
} else if (genericType instanceof Class<?>) {
JAXBContext context = getContext((Class<?>)genericType, genericType, mediaType);
Marshaller marshaller =
getJAXBMarshaller((Class<?>)genericType, context, mediaType);
Object entityToMarshal = getEntityToMarshal(t, (Class<?>)genericType);
// Use an OutputStream directly instead of a Writer for
// performance.
marshaller.marshal(entityToMarshal, entityStream);
releaseJAXBMarshaller(context, marshaller);
}
} catch (JAXBException e) {
if (logger.isErrorEnabled()) {
logger.error(Messages.getMessage("jaxbFailToMarshal", concreteType.getName()), e); //$NON-NLS-1$
}
throw new WebApplicationException(e);
}
}
}