/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.plugin.jackson;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import juzu.impl.request.EntityMarshaller;
import juzu.io.Chunk;
import juzu.io.Stream;
import juzu.io.Streamable;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.lang.reflect.AnnotatedElement;
/**
* @author Julien Viet
*/
public class JacksonMarshaller extends EntityMarshaller {
@Override
public Streamable marshall(String mimeType, AnnotatedElement annotations, Object object) {
if (mimeType.equals("application/json")) {
//
final byte[] data;
if (object instanceof TreeNode) {
try {
TreeNode tree = (TreeNode)object;
JsonFactory jfactory = new JsonFactory();
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
JsonGenerator generator = jfactory.createGenerator(buffer);
ObjectMapper mapper = new ObjectMapper();
mapper.writeTree(generator, tree);
data = buffer.toByteArray();
}
catch (IOException e) {
throw new UnsupportedOperationException("handle me gracefully", e);
}
} else if (annotations.getAnnotation(Jackson.class) != null) {
try {
ObjectMapper mapper = new ObjectMapper();
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
mapper.writeValue(buffer, object);
data = buffer.toByteArray();
}
catch (IOException e) {
throw new UnsupportedOperationException("handle me gracefully", e);
}
} else {
data = null;
}
//
if (data != null) {
return new Streamable() {
@Override
public void send(Stream stream) throws IllegalStateException {
try {
stream.provide(Chunk.create(data));
}
finally {
stream.close(null);
}
}
};
}
}
//
return null;
}
}