001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020package org.apache.hadoop.hbase.rest.provider.producer;
021
022import java.io.IOException;
023import java.io.OutputStream;
024import java.lang.annotation.Annotation;
025import java.lang.reflect.Type;
026
027import javax.ws.rs.Produces;
028import javax.ws.rs.WebApplicationException;
029import javax.ws.rs.core.MediaType;
030import javax.ws.rs.core.MultivaluedMap;
031import javax.ws.rs.ext.MessageBodyWriter;
032import javax.ws.rs.ext.Provider;
033
034import org.apache.hadoop.hbase.util.Bytes;
035import org.apache.hadoop.hbase.rest.Constants;
036import org.apache.yetus.audience.InterfaceAudience;
037
038/**
039 * An adapter between Jersey and Object.toString(). Hooks up plain text output
040 * to the Jersey content handling framework. 
041 * Jersey will first call getSize() to learn the number of bytes that will be
042 * sent, then writeTo to perform the actual I/O.
043 */
044@Provider
045@Produces(Constants.MIMETYPE_TEXT)
046@InterfaceAudience.Private
047public class PlainTextMessageBodyProducer 
048  implements MessageBodyWriter<Object> {
049
050  @Override
051  public boolean isWriteable(Class<?> arg0, Type arg1, Annotation[] arg2,
052      MediaType arg3) {
053    return true;
054  }
055
056  @Override
057  public long getSize(Object object, Class<?> type, Type genericType,
058      Annotation[] annotations, MediaType mediaType) {
059    // deprecated by JAX-RS 2.0 and ignored by Jersey runtime
060    return -1;
061  }
062
063  @Override
064  public void writeTo(Object object, Class<?> type, Type genericType,
065      Annotation[] annotations, MediaType mediaType,
066      MultivaluedMap<String, Object> httpHeaders, OutputStream outStream)
067      throws IOException, WebApplicationException {
068    outStream.write(Bytes.toBytes(object.toString()));
069  }
070}