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| 7 | Uses of Class org.apache.hadoop.mapreduce.Mapper (Hadoop 0.20.1 API) |
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| 83 | <H2> |
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| 84 | <B>Uses of Class<br>org.apache.hadoop.mapreduce.Mapper</B></H2> |
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| 87 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 89 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 90 | Packages that use <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A></FONT></TH> |
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| 91 | </TR> |
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| 92 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 93 | <TD><A HREF="#org.apache.hadoop.examples"><B>org.apache.hadoop.examples</B></A></TD> |
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| 94 | <TD>Hadoop example code. </TD> |
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| 95 | </TR> |
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| 96 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 97 | <TD><A HREF="#org.apache.hadoop.mapreduce"><B>org.apache.hadoop.mapreduce</B></A></TD> |
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| 98 | <TD> </TD> |
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| 99 | </TR> |
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| 100 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 101 | <TD><A HREF="#org.apache.hadoop.mapreduce.lib.map"><B>org.apache.hadoop.mapreduce.lib.map</B></A></TD> |
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| 102 | <TD> </TD> |
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| 103 | </TR> |
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| 104 | </TABLE> |
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| 105 | |
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| 106 | <P> |
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| 107 | <A NAME="org.apache.hadoop.examples"><!-- --></A> |
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| 108 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 109 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 110 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 111 | Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH> |
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| 112 | </TR> |
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| 113 | </TABLE> |
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| 114 | |
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| 115 | <P> |
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| 116 | |
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| 117 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 118 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 119 | <TH ALIGN="left" COLSPAN="2">Subclasses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH> |
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| 120 | </TR> |
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| 121 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 122 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 123 | <CODE>static class</CODE></FONT></TD> |
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| 124 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/SecondarySort.MapClass.html" title="class in org.apache.hadoop.examples">SecondarySort.MapClass</A></B></CODE> |
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| 125 | |
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| 126 | <BR> |
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| 127 | Read two integers from each line and generate a key, value pair |
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| 128 | as ((left, right), right).</TD> |
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| 129 | </TR> |
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| 130 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 131 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 132 | <CODE>static class</CODE></FONT></TD> |
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| 133 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/WordCount.TokenizerMapper.html" title="class in org.apache.hadoop.examples">WordCount.TokenizerMapper</A></B></CODE> |
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| 134 | |
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| 135 | <BR> |
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| 136 | </TD> |
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| 137 | </TR> |
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| 138 | </TABLE> |
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| 139 | |
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| 140 | <P> |
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| 141 | <A NAME="org.apache.hadoop.mapreduce"><!-- --></A> |
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| 142 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 143 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 144 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 145 | Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A></FONT></TH> |
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| 146 | </TR> |
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| 147 | </TABLE> |
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| 148 | |
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| 149 | <P> |
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| 150 | |
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| 151 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 152 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 153 | <TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> that return types with arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A></FONT></TH> |
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| 154 | </TR> |
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| 155 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 156 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 157 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A><?,?,?,?>></CODE></FONT></TD> |
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| 158 | <TD><CODE><B>JobContext.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getMapperClass()">getMapperClass</A></B>()</CODE> |
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| 159 | |
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| 160 | <BR> |
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| 161 | Get the <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A> class for the job.</TD> |
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| 162 | </TR> |
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| 163 | </TABLE> |
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| 164 | |
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| 165 | <P> |
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| 166 | |
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| 167 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 168 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 169 | <TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A></FONT></TH> |
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| 170 | </TR> |
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| 171 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 172 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 173 | <CODE> void</CODE></FONT></TD> |
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| 174 | <TD><CODE><B>Job.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html#setMapperClass(java.lang.Class)">setMapperClass</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A>> cls)</CODE> |
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| 175 | |
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| 176 | <BR> |
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| 177 | Set the <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A> for the job.</TD> |
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| 178 | </TR> |
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| 179 | </TABLE> |
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| 180 | |
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| 181 | <P> |
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| 182 | <A NAME="org.apache.hadoop.mapreduce.lib.map"><!-- --></A> |
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| 183 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 184 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 185 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 186 | Uses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</A></FONT></TH> |
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| 187 | </TR> |
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| 188 | </TABLE> |
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| 189 | |
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| 190 | <P> |
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| 191 | |
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| 192 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 193 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 194 | <TH ALIGN="left" COLSPAN="2">Subclasses of <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</A></FONT></TH> |
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| 195 | </TR> |
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| 196 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 197 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 198 | <CODE> class</CODE></FONT></TD> |
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| 199 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/InverseMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">InverseMapper<K,V></A></B></CODE> |
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| 200 | |
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| 201 | <BR> |
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| 202 | A <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A> that swaps keys and values.</TD> |
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| 203 | </TR> |
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| 204 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 205 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 206 | <CODE> class</CODE></FONT></TD> |
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| 207 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">MultithreadedMapper<K1,V1,K2,V2></A></B></CODE> |
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| 208 | |
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| 209 | <BR> |
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| 210 | Multithreaded implementation for @link org.apache.hadoop.mapreduce.Mapper.</TD> |
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| 211 | </TR> |
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| 212 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 213 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 214 | <CODE> class</CODE></FONT></TD> |
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| 215 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/TokenCounterMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">TokenCounterMapper</A></B></CODE> |
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| 216 | |
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| 217 | <BR> |
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| 218 | Tokenize the input values and emit each word with a count of 1.</TD> |
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| 219 | </TR> |
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| 220 | </TABLE> |
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| 221 | |
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| 222 | <P> |
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| 223 | |
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| 224 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 225 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 226 | <TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</A> that return types with arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A></FONT></TH> |
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| 227 | </TR> |
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| 228 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 229 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 230 | <CODE>static |
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| 231 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
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| 232 | <TR ALIGN="right" VALIGN=""> |
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| 233 | <TD NOWRAP><FONT SIZE="-1"> |
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| 234 | <CODE><K1,V1,K2,V2> |
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| 235 | <BR> |
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| 236 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><<A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A><K1,V1,K2,V2>></CODE></FONT></TD> |
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| 237 | </TR> |
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| 238 | </TABLE> |
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| 239 | </CODE></FONT></TD> |
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| 240 | <TD><CODE><B>MultithreadedMapper.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html#getMapperClass(org.apache.hadoop.mapreduce.JobContext)">getMapperClass</A></B>(<A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">JobContext</A> job)</CODE> |
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| 241 | |
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| 242 | <BR> |
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| 243 | Get the application's mapper class.</TD> |
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| 244 | </TR> |
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| 245 | </TABLE> |
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| 246 | |
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| 247 | <P> |
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| 248 | |
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| 249 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 250 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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| 251 | <TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A></FONT></TH> |
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| 252 | </TR> |
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| 253 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 254 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 255 | <CODE>static |
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| 256 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
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| 257 | <TR ALIGN="right" VALIGN=""> |
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| 258 | <TD NOWRAP><FONT SIZE="-1"> |
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| 259 | <CODE><K1,V1,K2,V2> |
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| 260 | <BR> |
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| 261 | void</CODE></FONT></TD> |
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| 262 | </TR> |
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| 263 | </TABLE> |
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| 264 | </CODE></FONT></TD> |
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| 265 | <TD><CODE><B>MultithreadedMapper.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html#setMapperClass(org.apache.hadoop.mapreduce.Job, java.lang.Class)">setMapperClass</A></B>(<A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</A> job, |
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| 266 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</A><K1,V1,K2,V2>> cls)</CODE> |
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| 267 | |
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| 268 | <BR> |
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| 269 | Set the application's mapper class.</TD> |
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| 270 | </TR> |
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| 271 | </TABLE> |
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| 272 | |
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