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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<FONT color="green">003</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
<FONT color="green">004</FONT>     * distributed with this work for additional information<a name="line.4"></a>
<FONT color="green">005</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
<FONT color="green">006</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<FONT color="green">007</FONT>     * "License"); you may not use this file except in compliance<a name="line.7"></a>
<FONT color="green">008</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<FONT color="green">013</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<FONT color="green">014</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<FONT color="green">015</FONT>     * See the License for the specific language governing permissions and<a name="line.15"></a>
<FONT color="green">016</FONT>     * limitations under the License.<a name="line.16"></a>
<FONT color="green">017</FONT>     */<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    package org.apache.hadoop.mapreduce.lib.output;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.DataOutputStream;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.IOException;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.UnsupportedEncodingException;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import org.apache.hadoop.classification.InterfaceAudience;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.hadoop.classification.InterfaceStability;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.hadoop.conf.Configuration;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.hadoop.fs.FileSystem;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.hadoop.fs.Path;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.hadoop.fs.FSDataOutputStream;<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.hadoop.io.NullWritable;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.hadoop.io.Text;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.hadoop.io.compress.CompressionCodec;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.hadoop.io.compress.GzipCodec;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.hadoop.mapreduce.OutputFormat;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.apache.hadoop.mapreduce.RecordWriter;<a name="line.37"></a>
<FONT color="green">038</FONT>    import org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.38"></a>
<FONT color="green">039</FONT>    import org.apache.hadoop.util.*;<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>    /** An {@link OutputFormat} that writes plain text files. */<a name="line.41"></a>
<FONT color="green">042</FONT>    @InterfaceAudience.Public<a name="line.42"></a>
<FONT color="green">043</FONT>    @InterfaceStability.Stable<a name="line.43"></a>
<FONT color="green">044</FONT>    public class TextOutputFormat&lt;K, V&gt; extends FileOutputFormat&lt;K, V&gt; {<a name="line.44"></a>
<FONT color="green">045</FONT>      public static String SEPERATOR = "mapreduce.output.textoutputformat.separator";<a name="line.45"></a>
<FONT color="green">046</FONT>      protected static class LineRecordWriter&lt;K, V&gt;<a name="line.46"></a>
<FONT color="green">047</FONT>        extends RecordWriter&lt;K, V&gt; {<a name="line.47"></a>
<FONT color="green">048</FONT>        private static final String utf8 = "UTF-8";<a name="line.48"></a>
<FONT color="green">049</FONT>        private static final byte[] newline;<a name="line.49"></a>
<FONT color="green">050</FONT>        static {<a name="line.50"></a>
<FONT color="green">051</FONT>          try {<a name="line.51"></a>
<FONT color="green">052</FONT>            newline = "\n".getBytes(utf8);<a name="line.52"></a>
<FONT color="green">053</FONT>          } catch (UnsupportedEncodingException uee) {<a name="line.53"></a>
<FONT color="green">054</FONT>            throw new IllegalArgumentException("can't find " + utf8 + " encoding");<a name="line.54"></a>
<FONT color="green">055</FONT>          }<a name="line.55"></a>
<FONT color="green">056</FONT>        }<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>        protected DataOutputStream out;<a name="line.58"></a>
<FONT color="green">059</FONT>        private final byte[] keyValueSeparator;<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>        public LineRecordWriter(DataOutputStream out, String keyValueSeparator) {<a name="line.61"></a>
<FONT color="green">062</FONT>          this.out = out;<a name="line.62"></a>
<FONT color="green">063</FONT>          try {<a name="line.63"></a>
<FONT color="green">064</FONT>            this.keyValueSeparator = keyValueSeparator.getBytes(utf8);<a name="line.64"></a>
<FONT color="green">065</FONT>          } catch (UnsupportedEncodingException uee) {<a name="line.65"></a>
<FONT color="green">066</FONT>            throw new IllegalArgumentException("can't find " + utf8 + " encoding");<a name="line.66"></a>
<FONT color="green">067</FONT>          }<a name="line.67"></a>
<FONT color="green">068</FONT>        }<a name="line.68"></a>
<FONT color="green">069</FONT>    <a name="line.69"></a>
<FONT color="green">070</FONT>        public LineRecordWriter(DataOutputStream out) {<a name="line.70"></a>
<FONT color="green">071</FONT>          this(out, "\t");<a name="line.71"></a>
<FONT color="green">072</FONT>        }<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>        /**<a name="line.74"></a>
<FONT color="green">075</FONT>         * Write the object to the byte stream, handling Text as a special<a name="line.75"></a>
<FONT color="green">076</FONT>         * case.<a name="line.76"></a>
<FONT color="green">077</FONT>         * @param o the object to print<a name="line.77"></a>
<FONT color="green">078</FONT>         * @throws IOException if the write throws, we pass it on<a name="line.78"></a>
<FONT color="green">079</FONT>         */<a name="line.79"></a>
<FONT color="green">080</FONT>        private void writeObject(Object o) throws IOException {<a name="line.80"></a>
<FONT color="green">081</FONT>          if (o instanceof Text) {<a name="line.81"></a>
<FONT color="green">082</FONT>            Text to = (Text) o;<a name="line.82"></a>
<FONT color="green">083</FONT>            out.write(to.getBytes(), 0, to.getLength());<a name="line.83"></a>
<FONT color="green">084</FONT>          } else {<a name="line.84"></a>
<FONT color="green">085</FONT>            out.write(o.toString().getBytes(utf8));<a name="line.85"></a>
<FONT color="green">086</FONT>          }<a name="line.86"></a>
<FONT color="green">087</FONT>        }<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>        public synchronized void write(K key, V value)<a name="line.89"></a>
<FONT color="green">090</FONT>          throws IOException {<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>          boolean nullKey = key == null || key instanceof NullWritable;<a name="line.92"></a>
<FONT color="green">093</FONT>          boolean nullValue = value == null || value instanceof NullWritable;<a name="line.93"></a>
<FONT color="green">094</FONT>          if (nullKey &amp;&amp; nullValue) {<a name="line.94"></a>
<FONT color="green">095</FONT>            return;<a name="line.95"></a>
<FONT color="green">096</FONT>          }<a name="line.96"></a>
<FONT color="green">097</FONT>          if (!nullKey) {<a name="line.97"></a>
<FONT color="green">098</FONT>            writeObject(key);<a name="line.98"></a>
<FONT color="green">099</FONT>          }<a name="line.99"></a>
<FONT color="green">100</FONT>          if (!(nullKey || nullValue)) {<a name="line.100"></a>
<FONT color="green">101</FONT>            out.write(keyValueSeparator);<a name="line.101"></a>
<FONT color="green">102</FONT>          }<a name="line.102"></a>
<FONT color="green">103</FONT>          if (!nullValue) {<a name="line.103"></a>
<FONT color="green">104</FONT>            writeObject(value);<a name="line.104"></a>
<FONT color="green">105</FONT>          }<a name="line.105"></a>
<FONT color="green">106</FONT>          out.write(newline);<a name="line.106"></a>
<FONT color="green">107</FONT>        }<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>        public synchronized <a name="line.109"></a>
<FONT color="green">110</FONT>        void close(TaskAttemptContext context) throws IOException {<a name="line.110"></a>
<FONT color="green">111</FONT>          out.close();<a name="line.111"></a>
<FONT color="green">112</FONT>        }<a name="line.112"></a>
<FONT color="green">113</FONT>      }<a name="line.113"></a>
<FONT color="green">114</FONT>    <a name="line.114"></a>
<FONT color="green">115</FONT>      public RecordWriter&lt;K, V&gt; <a name="line.115"></a>
<FONT color="green">116</FONT>             getRecordWriter(TaskAttemptContext job<a name="line.116"></a>
<FONT color="green">117</FONT>                             ) throws IOException, InterruptedException {<a name="line.117"></a>
<FONT color="green">118</FONT>        Configuration conf = job.getConfiguration();<a name="line.118"></a>
<FONT color="green">119</FONT>        boolean isCompressed = getCompressOutput(job);<a name="line.119"></a>
<FONT color="green">120</FONT>        String keyValueSeparator= conf.get(SEPERATOR, "\t");<a name="line.120"></a>
<FONT color="green">121</FONT>        CompressionCodec codec = null;<a name="line.121"></a>
<FONT color="green">122</FONT>        String extension = "";<a name="line.122"></a>
<FONT color="green">123</FONT>        if (isCompressed) {<a name="line.123"></a>
<FONT color="green">124</FONT>          Class&lt;? extends CompressionCodec&gt; codecClass = <a name="line.124"></a>
<FONT color="green">125</FONT>            getOutputCompressorClass(job, GzipCodec.class);<a name="line.125"></a>
<FONT color="green">126</FONT>          codec = (CompressionCodec) ReflectionUtils.newInstance(codecClass, conf);<a name="line.126"></a>
<FONT color="green">127</FONT>          extension = codec.getDefaultExtension();<a name="line.127"></a>
<FONT color="green">128</FONT>        }<a name="line.128"></a>
<FONT color="green">129</FONT>        Path file = getDefaultWorkFile(job, extension);<a name="line.129"></a>
<FONT color="green">130</FONT>        FileSystem fs = file.getFileSystem(conf);<a name="line.130"></a>
<FONT color="green">131</FONT>        if (!isCompressed) {<a name="line.131"></a>
<FONT color="green">132</FONT>          FSDataOutputStream fileOut = fs.create(file, false);<a name="line.132"></a>
<FONT color="green">133</FONT>          return new LineRecordWriter&lt;K, V&gt;(fileOut, keyValueSeparator);<a name="line.133"></a>
<FONT color="green">134</FONT>        } else {<a name="line.134"></a>
<FONT color="green">135</FONT>          FSDataOutputStream fileOut = fs.create(file, false);<a name="line.135"></a>
<FONT color="green">136</FONT>          return new LineRecordWriter&lt;K, V&gt;(new DataOutputStream<a name="line.136"></a>
<FONT color="green">137</FONT>                                            (codec.createOutputStream(fileOut)),<a name="line.137"></a>
<FONT color="green">138</FONT>                                            keyValueSeparator);<a name="line.138"></a>
<FONT color="green">139</FONT>        }<a name="line.139"></a>
<FONT color="green">140</FONT>      }<a name="line.140"></a>
<FONT color="green">141</FONT>    }<a name="line.141"></a>
<FONT color="green">142</FONT>    <a name="line.142"></a>




























































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