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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.join;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.DataInput;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.DataInputStream;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.DataOutput;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.io.DataOutputStream;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.io.IOException;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.HashSet;<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.hadoop.classification.InterfaceAudience;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.hadoop.classification.InterfaceStability;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.hadoop.conf.Configuration;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.hadoop.io.Text;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.hadoop.io.Writable;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.hadoop.io.WritableUtils;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.hadoop.io.serializer.*;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.hadoop.mapreduce.InputSplit;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.hadoop.util.ReflectionUtils;<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>    /**<a name="line.38"></a>
<FONT color="green">039</FONT>     * This InputSplit contains a set of child InputSplits. Any InputSplit inserted<a name="line.39"></a>
<FONT color="green">040</FONT>     * into this collection must have a public default constructor.<a name="line.40"></a>
<FONT color="green">041</FONT>     */<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 CompositeInputSplit extends InputSplit implements Writable {<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>      private int fill = 0;<a name="line.46"></a>
<FONT color="green">047</FONT>      private long totsize = 0L;<a name="line.47"></a>
<FONT color="green">048</FONT>      private InputSplit[] splits;<a name="line.48"></a>
<FONT color="green">049</FONT>      private Configuration conf = new Configuration();<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>      public CompositeInputSplit() { }<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>      public CompositeInputSplit(int capacity) {<a name="line.53"></a>
<FONT color="green">054</FONT>        splits = new InputSplit[capacity];<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>       * Add an InputSplit to this collection.<a name="line.58"></a>
<FONT color="green">059</FONT>       * @throws IOException If capacity was not specified during construction<a name="line.59"></a>
<FONT color="green">060</FONT>       *                     or if capacity has been reached.<a name="line.60"></a>
<FONT color="green">061</FONT>       */<a name="line.61"></a>
<FONT color="green">062</FONT>      public void add(InputSplit s) throws IOException, InterruptedException {<a name="line.62"></a>
<FONT color="green">063</FONT>        if (null == splits) {<a name="line.63"></a>
<FONT color="green">064</FONT>          throw new IOException("Uninitialized InputSplit");<a name="line.64"></a>
<FONT color="green">065</FONT>        }<a name="line.65"></a>
<FONT color="green">066</FONT>        if (fill == splits.length) {<a name="line.66"></a>
<FONT color="green">067</FONT>          throw new IOException("Too many splits");<a name="line.67"></a>
<FONT color="green">068</FONT>        }<a name="line.68"></a>
<FONT color="green">069</FONT>        splits[fill++] = s;<a name="line.69"></a>
<FONT color="green">070</FONT>        totsize += s.getLength();<a name="line.70"></a>
<FONT color="green">071</FONT>      }<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>       * Get ith child InputSplit.<a name="line.74"></a>
<FONT color="green">075</FONT>       */<a name="line.75"></a>
<FONT color="green">076</FONT>      public InputSplit get(int i) {<a name="line.76"></a>
<FONT color="green">077</FONT>        return splits[i];<a name="line.77"></a>
<FONT color="green">078</FONT>      }<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>      /**<a name="line.80"></a>
<FONT color="green">081</FONT>       * Return the aggregate length of all child InputSplits currently added.<a name="line.81"></a>
<FONT color="green">082</FONT>       */<a name="line.82"></a>
<FONT color="green">083</FONT>      public long getLength() throws IOException {<a name="line.83"></a>
<FONT color="green">084</FONT>        return totsize;<a name="line.84"></a>
<FONT color="green">085</FONT>      }<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>       * Get the length of ith child InputSplit.<a name="line.88"></a>
<FONT color="green">089</FONT>       */<a name="line.89"></a>
<FONT color="green">090</FONT>      public long getLength(int i) throws IOException, InterruptedException {<a name="line.90"></a>
<FONT color="green">091</FONT>        return splits[i].getLength();<a name="line.91"></a>
<FONT color="green">092</FONT>      }<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>      /**<a name="line.94"></a>
<FONT color="green">095</FONT>       * Collect a set of hosts from all child InputSplits.<a name="line.95"></a>
<FONT color="green">096</FONT>       */<a name="line.96"></a>
<FONT color="green">097</FONT>      public String[] getLocations() throws IOException, InterruptedException {<a name="line.97"></a>
<FONT color="green">098</FONT>        HashSet&lt;String&gt; hosts = new HashSet&lt;String&gt;();<a name="line.98"></a>
<FONT color="green">099</FONT>        for (InputSplit s : splits) {<a name="line.99"></a>
<FONT color="green">100</FONT>          String[] hints = s.getLocations();<a name="line.100"></a>
<FONT color="green">101</FONT>          if (hints != null &amp;&amp; hints.length &gt; 0) {<a name="line.101"></a>
<FONT color="green">102</FONT>            for (String host : hints) {<a name="line.102"></a>
<FONT color="green">103</FONT>              hosts.add(host);<a name="line.103"></a>
<FONT color="green">104</FONT>            }<a name="line.104"></a>
<FONT color="green">105</FONT>          }<a name="line.105"></a>
<FONT color="green">106</FONT>        }<a name="line.106"></a>
<FONT color="green">107</FONT>        return hosts.toArray(new String[hosts.size()]);<a name="line.107"></a>
<FONT color="green">108</FONT>      }<a name="line.108"></a>
<FONT color="green">109</FONT>    <a name="line.109"></a>
<FONT color="green">110</FONT>      /**<a name="line.110"></a>
<FONT color="green">111</FONT>       * getLocations from ith InputSplit.<a name="line.111"></a>
<FONT color="green">112</FONT>       */<a name="line.112"></a>
<FONT color="green">113</FONT>      public String[] getLocation(int i) throws IOException, InterruptedException {<a name="line.113"></a>
<FONT color="green">114</FONT>        return splits[i].getLocations();<a name="line.114"></a>
<FONT color="green">115</FONT>      }<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>       * Write splits in the following format.<a name="line.118"></a>
<FONT color="green">119</FONT>       * {@code<a name="line.119"></a>
<FONT color="green">120</FONT>       * &lt;count&gt;&lt;class1&gt;&lt;class2&gt;...&lt;classn&gt;&lt;split1&gt;&lt;split2&gt;...&lt;splitn&gt;<a name="line.120"></a>
<FONT color="green">121</FONT>       * }<a name="line.121"></a>
<FONT color="green">122</FONT>       */<a name="line.122"></a>
<FONT color="green">123</FONT>      @SuppressWarnings("unchecked")<a name="line.123"></a>
<FONT color="green">124</FONT>      public void write(DataOutput out) throws IOException {<a name="line.124"></a>
<FONT color="green">125</FONT>        WritableUtils.writeVInt(out, splits.length);<a name="line.125"></a>
<FONT color="green">126</FONT>        for (InputSplit s : splits) {<a name="line.126"></a>
<FONT color="green">127</FONT>          Text.writeString(out, s.getClass().getName());<a name="line.127"></a>
<FONT color="green">128</FONT>        }<a name="line.128"></a>
<FONT color="green">129</FONT>        for (InputSplit s : splits) {<a name="line.129"></a>
<FONT color="green">130</FONT>          SerializationFactory factory = new SerializationFactory(conf);<a name="line.130"></a>
<FONT color="green">131</FONT>          Serializer serializer = <a name="line.131"></a>
<FONT color="green">132</FONT>            factory.getSerializer(s.getClass());<a name="line.132"></a>
<FONT color="green">133</FONT>          serializer.open((DataOutputStream)out);<a name="line.133"></a>
<FONT color="green">134</FONT>          serializer.serialize(s);<a name="line.134"></a>
<FONT color="green">135</FONT>        }<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>       * {@inheritDoc}<a name="line.139"></a>
<FONT color="green">140</FONT>       * @throws IOException If the child InputSplit cannot be read, typically<a name="line.140"></a>
<FONT color="green">141</FONT>       *                     for failing access checks.<a name="line.141"></a>
<FONT color="green">142</FONT>       */<a name="line.142"></a>
<FONT color="green">143</FONT>      @SuppressWarnings("unchecked")  // Generic array assignment<a name="line.143"></a>
<FONT color="green">144</FONT>      public void readFields(DataInput in) throws IOException {<a name="line.144"></a>
<FONT color="green">145</FONT>        int card = WritableUtils.readVInt(in);<a name="line.145"></a>
<FONT color="green">146</FONT>        if (splits == null || splits.length != card) {<a name="line.146"></a>
<FONT color="green">147</FONT>          splits = new InputSplit[card];<a name="line.147"></a>
<FONT color="green">148</FONT>        }<a name="line.148"></a>
<FONT color="green">149</FONT>        Class&lt;? extends InputSplit&gt;[] cls = new Class[card];<a name="line.149"></a>
<FONT color="green">150</FONT>        try {<a name="line.150"></a>
<FONT color="green">151</FONT>          for (int i = 0; i &lt; card; ++i) {<a name="line.151"></a>
<FONT color="green">152</FONT>            cls[i] =<a name="line.152"></a>
<FONT color="green">153</FONT>              Class.forName(Text.readString(in)).asSubclass(InputSplit.class);<a name="line.153"></a>
<FONT color="green">154</FONT>          }<a name="line.154"></a>
<FONT color="green">155</FONT>          for (int i = 0; i &lt; card; ++i) {<a name="line.155"></a>
<FONT color="green">156</FONT>            splits[i] = ReflectionUtils.newInstance(cls[i], null);<a name="line.156"></a>
<FONT color="green">157</FONT>            SerializationFactory factory = new SerializationFactory(conf);<a name="line.157"></a>
<FONT color="green">158</FONT>            Deserializer deserializer = factory.getDeserializer(cls[i]);<a name="line.158"></a>
<FONT color="green">159</FONT>            deserializer.open((DataInputStream)in);<a name="line.159"></a>
<FONT color="green">160</FONT>            splits[i] = (InputSplit)deserializer.deserialize(splits[i]);<a name="line.160"></a>
<FONT color="green">161</FONT>          }<a name="line.161"></a>
<FONT color="green">162</FONT>        } catch (ClassNotFoundException e) {<a name="line.162"></a>
<FONT color="green">163</FONT>          throw new IOException("Failed split init", e);<a name="line.163"></a>
<FONT color="green">164</FONT>        }<a name="line.164"></a>
<FONT color="green">165</FONT>      }<a name="line.165"></a>
<FONT color="green">166</FONT>    }<a name="line.166"></a>




























































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