/*
* Copyright 2010 Outerthought bvba
*
* 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
*
* 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.lilyproject.rest.providers.json;
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.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import org.apache.commons.io.output.CloseShieldOutputStream;
import org.codehaus.jackson.node.ObjectNode;
import org.lilyproject.rest.BaseRepositoryResource;
import org.lilyproject.rest.Entity;
import org.lilyproject.rest.ResourceException;
import org.lilyproject.tools.import_.json.EntityWriter;
import org.lilyproject.util.json.JsonFormat;
@Provider
public class EntityMessageBodyWriter extends BaseRepositoryResource implements MessageBodyWriter<Entity> {
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return type.equals(Entity.class) && mediaType.equals(MediaType.APPLICATION_JSON_TYPE);
}
@Override
public long getSize(Entity o, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return -1;
}
@Override
public void writeTo(Entity object, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
throws IOException, WebApplicationException {
try {
EntityWriter writer = EntityRegistry.findWriter(object.getEntity().getClass());
// Multiple repositories: ok to use public repo since only non-repository-specific things are needed
ObjectNode json = writer.toJson(object.getEntity(), object.getWriteOptions(),
repositoryMgr.getDefaultRepository());
JsonFormat.serialize(json, new CloseShieldOutputStream(entityStream));
} catch (Throwable e) {
// We catch every throwable, since otherwise no one does it and we will not have any trace
// of Errors that happened.
throw new ResourceException("Error serializing entity.", e,
Response.Status.INTERNAL_SERVER_ERROR.getStatusCode());
}
}
}