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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>    package org.apache.hadoop.mapred;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.IOException;<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.hadoop.classification.InterfaceAudience;<a name="line.22"></a>
<FONT color="green">023</FONT>    import org.apache.hadoop.classification.InterfaceStability;<a name="line.23"></a>
<FONT color="green">024</FONT>    import org.apache.hadoop.conf.Configuration;<a name="line.24"></a>
<FONT color="green">025</FONT>    import org.apache.hadoop.fs.FileSystem;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.hadoop.fs.Path;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.hadoop.io.BytesWritable;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.hadoop.io.DataOutputBuffer;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.hadoop.io.SequenceFile;<a name="line.29"></a>
<FONT color="green">030</FONT>    <a name="line.30"></a>
<FONT color="green">031</FONT>    /**<a name="line.31"></a>
<FONT color="green">032</FONT>     * InputFormat reading keys, values from SequenceFiles in binary (raw)<a name="line.32"></a>
<FONT color="green">033</FONT>     * format.<a name="line.33"></a>
<FONT color="green">034</FONT>     */<a name="line.34"></a>
<FONT color="green">035</FONT>    @InterfaceAudience.Public<a name="line.35"></a>
<FONT color="green">036</FONT>    @InterfaceStability.Stable<a name="line.36"></a>
<FONT color="green">037</FONT>    public class SequenceFileAsBinaryInputFormat<a name="line.37"></a>
<FONT color="green">038</FONT>        extends SequenceFileInputFormat&lt;BytesWritable,BytesWritable&gt; {<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>      public SequenceFileAsBinaryInputFormat() {<a name="line.40"></a>
<FONT color="green">041</FONT>        super();<a name="line.41"></a>
<FONT color="green">042</FONT>      }<a name="line.42"></a>
<FONT color="green">043</FONT>    <a name="line.43"></a>
<FONT color="green">044</FONT>      public RecordReader&lt;BytesWritable,BytesWritable&gt; getRecordReader(<a name="line.44"></a>
<FONT color="green">045</FONT>          InputSplit split, JobConf job, Reporter reporter)<a name="line.45"></a>
<FONT color="green">046</FONT>          throws IOException {<a name="line.46"></a>
<FONT color="green">047</FONT>        return new SequenceFileAsBinaryRecordReader(job, (FileSplit)split);<a name="line.47"></a>
<FONT color="green">048</FONT>      }<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>      /**<a name="line.50"></a>
<FONT color="green">051</FONT>       * Read records from a SequenceFile as binary (raw) bytes.<a name="line.51"></a>
<FONT color="green">052</FONT>       */<a name="line.52"></a>
<FONT color="green">053</FONT>      public static class SequenceFileAsBinaryRecordReader<a name="line.53"></a>
<FONT color="green">054</FONT>          implements RecordReader&lt;BytesWritable,BytesWritable&gt; {<a name="line.54"></a>
<FONT color="green">055</FONT>        private SequenceFile.Reader in;<a name="line.55"></a>
<FONT color="green">056</FONT>        private long start;<a name="line.56"></a>
<FONT color="green">057</FONT>        private long end;<a name="line.57"></a>
<FONT color="green">058</FONT>        private boolean done = false;<a name="line.58"></a>
<FONT color="green">059</FONT>        private DataOutputBuffer buffer = new DataOutputBuffer();<a name="line.59"></a>
<FONT color="green">060</FONT>        private SequenceFile.ValueBytes vbytes;<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>        public SequenceFileAsBinaryRecordReader(Configuration conf, FileSplit split)<a name="line.62"></a>
<FONT color="green">063</FONT>            throws IOException {<a name="line.63"></a>
<FONT color="green">064</FONT>          Path path = split.getPath();<a name="line.64"></a>
<FONT color="green">065</FONT>          FileSystem fs = path.getFileSystem(conf);<a name="line.65"></a>
<FONT color="green">066</FONT>          this.in = new SequenceFile.Reader(fs, path, conf);<a name="line.66"></a>
<FONT color="green">067</FONT>          this.end = split.getStart() + split.getLength();<a name="line.67"></a>
<FONT color="green">068</FONT>          if (split.getStart() &gt; in.getPosition())<a name="line.68"></a>
<FONT color="green">069</FONT>            in.sync(split.getStart());                  // sync to start<a name="line.69"></a>
<FONT color="green">070</FONT>          this.start = in.getPosition();<a name="line.70"></a>
<FONT color="green">071</FONT>          vbytes = in.createValueBytes();<a name="line.71"></a>
<FONT color="green">072</FONT>          done = start &gt;= end;<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>        public BytesWritable createKey() {<a name="line.75"></a>
<FONT color="green">076</FONT>          return new BytesWritable();<a name="line.76"></a>
<FONT color="green">077</FONT>        }<a name="line.77"></a>
<FONT color="green">078</FONT>    <a name="line.78"></a>
<FONT color="green">079</FONT>        public BytesWritable createValue() {<a name="line.79"></a>
<FONT color="green">080</FONT>          return new BytesWritable();<a name="line.80"></a>
<FONT color="green">081</FONT>        }<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>        /**<a name="line.83"></a>
<FONT color="green">084</FONT>         * Retrieve the name of the key class for this SequenceFile.<a name="line.84"></a>
<FONT color="green">085</FONT>         * @see org.apache.hadoop.io.SequenceFile.Reader#getKeyClassName<a name="line.85"></a>
<FONT color="green">086</FONT>         */<a name="line.86"></a>
<FONT color="green">087</FONT>        public String getKeyClassName() {<a name="line.87"></a>
<FONT color="green">088</FONT>          return in.getKeyClassName();<a name="line.88"></a>
<FONT color="green">089</FONT>        }<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>        /**<a name="line.91"></a>
<FONT color="green">092</FONT>         * Retrieve the name of the value class for this SequenceFile.<a name="line.92"></a>
<FONT color="green">093</FONT>         * @see org.apache.hadoop.io.SequenceFile.Reader#getValueClassName<a name="line.93"></a>
<FONT color="green">094</FONT>         */<a name="line.94"></a>
<FONT color="green">095</FONT>        public String getValueClassName() {<a name="line.95"></a>
<FONT color="green">096</FONT>          return in.getValueClassName();<a name="line.96"></a>
<FONT color="green">097</FONT>        }<a name="line.97"></a>
<FONT color="green">098</FONT>    <a name="line.98"></a>
<FONT color="green">099</FONT>        /**<a name="line.99"></a>
<FONT color="green">100</FONT>         * Read raw bytes from a SequenceFile.<a name="line.100"></a>
<FONT color="green">101</FONT>         */<a name="line.101"></a>
<FONT color="green">102</FONT>        public synchronized boolean next(BytesWritable key, BytesWritable val)<a name="line.102"></a>
<FONT color="green">103</FONT>            throws IOException {<a name="line.103"></a>
<FONT color="green">104</FONT>          if (done) return false;<a name="line.104"></a>
<FONT color="green">105</FONT>          long pos = in.getPosition();<a name="line.105"></a>
<FONT color="green">106</FONT>          boolean eof = -1 == in.nextRawKey(buffer);<a name="line.106"></a>
<FONT color="green">107</FONT>          if (!eof) {<a name="line.107"></a>
<FONT color="green">108</FONT>            key.set(buffer.getData(), 0, buffer.getLength());<a name="line.108"></a>
<FONT color="green">109</FONT>            buffer.reset();<a name="line.109"></a>
<FONT color="green">110</FONT>            in.nextRawValue(vbytes);<a name="line.110"></a>
<FONT color="green">111</FONT>            vbytes.writeUncompressedBytes(buffer);<a name="line.111"></a>
<FONT color="green">112</FONT>            val.set(buffer.getData(), 0, buffer.getLength());<a name="line.112"></a>
<FONT color="green">113</FONT>            buffer.reset();<a name="line.113"></a>
<FONT color="green">114</FONT>          }<a name="line.114"></a>
<FONT color="green">115</FONT>          return !(done = (eof || (pos &gt;= end &amp;&amp; in.syncSeen())));<a name="line.115"></a>
<FONT color="green">116</FONT>        }<a name="line.116"></a>
<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>        public long getPos() throws IOException {<a name="line.118"></a>
<FONT color="green">119</FONT>          return in.getPosition();<a name="line.119"></a>
<FONT color="green">120</FONT>        }<a name="line.120"></a>
<FONT color="green">121</FONT>    <a name="line.121"></a>
<FONT color="green">122</FONT>        public void close() throws IOException {<a name="line.122"></a>
<FONT color="green">123</FONT>          in.close();<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>    <a name="line.125"></a>
<FONT color="green">126</FONT>        /**<a name="line.126"></a>
<FONT color="green">127</FONT>         * Return the progress within the input split<a name="line.127"></a>
<FONT color="green">128</FONT>         * @return 0.0 to 1.0 of the input byte range<a name="line.128"></a>
<FONT color="green">129</FONT>         */<a name="line.129"></a>
<FONT color="green">130</FONT>        public float getProgress() throws IOException {<a name="line.130"></a>
<FONT color="green">131</FONT>          if (end == start) {<a name="line.131"></a>
<FONT color="green">132</FONT>            return 0.0f;<a name="line.132"></a>
<FONT color="green">133</FONT>          } else {<a name="line.133"></a>
<FONT color="green">134</FONT>            return Math.min(1.0f, (float)((in.getPosition() - start) /<a name="line.134"></a>
<FONT color="green">135</FONT>                                          (double)(end - start)));<a name="line.135"></a>
<FONT color="green">136</FONT>          }<a name="line.136"></a>
<FONT color="green">137</FONT>        }<a name="line.137"></a>
<FONT color="green">138</FONT>      }<a name="line.138"></a>
<FONT color="green">139</FONT>    }<a name="line.139"></a>




























































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