| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * 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 |
| * |
| * 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.apache.hadoop.streaming.io; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.streaming.PipeMapRed; |
| |
| /** |
| * InputWriter that writes the client's input as text. |
| */ |
| public class TextInputWriter extends InputWriter<Object, Object> { |
| |
| private DataOutput clientOut; |
| private byte[] inputSeparator; |
| |
| @Override |
| public void initialize(PipeMapRed pipeMapRed) throws IOException { |
| super.initialize(pipeMapRed); |
| clientOut = pipeMapRed.getClientOutput(); |
| inputSeparator = pipeMapRed.getInputSeparator(); |
| } |
| |
| @Override |
| public void writeKey(Object key) throws IOException { |
| writeUTF8(key); |
| clientOut.write(inputSeparator); |
| } |
| |
| @Override |
| public void writeValue(Object value) throws IOException { |
| writeUTF8(value); |
| clientOut.write('\n'); |
| } |
| |
| // Write an object to the output stream using UTF-8 encoding |
| private void writeUTF8(Object object) throws IOException { |
| byte[] bval; |
| int valSize; |
| if (object instanceof BytesWritable) { |
| BytesWritable val = (BytesWritable) object; |
| bval = val.getBytes(); |
| valSize = val.getLength(); |
| } else if (object instanceof Text) { |
| Text val = (Text) object; |
| bval = val.getBytes(); |
| valSize = val.getLength(); |
| } else { |
| String sval = object.toString(); |
| bval = sval.getBytes("UTF-8"); |
| valSize = bval.length; |
| } |
| clientOut.write(bval, 0, valSize); |
| } |
| |
| } |