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| 7 | ValueAggregatorBaseDescriptor (Hadoop 0.20.1 API) |
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| 79 | SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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| 89 | <H2> |
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| 90 | <FONT SIZE="-1"> |
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| 91 | org.apache.hadoop.mapred.lib.aggregate</FONT> |
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| 92 | <BR> |
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| 93 | Class ValueAggregatorBaseDescriptor</H2> |
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| 94 | <PRE> |
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| 95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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| 96 | <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor</B> |
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| 97 | </PRE> |
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| 98 | <DL> |
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| 99 | <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</A></DD> |
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| 100 | </DL> |
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| 101 | <DL> |
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| 102 | <DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../../org/apache/hadoop/examples/AggregateWordCount.WordCountPlugInClass.html" title="class in org.apache.hadoop.examples">AggregateWordCount.WordCountPlugInClass</A>, <A HREF="../../../../../../org/apache/hadoop/examples/AggregateWordHistogram.AggregateWordHistogramPlugin.html" title="class in org.apache.hadoop.examples">AggregateWordHistogram.AggregateWordHistogramPlugin</A></DD> |
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| 103 | </DL> |
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| 104 | <HR> |
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| 105 | <DL> |
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| 106 | <DT><PRE>public class <B>ValueAggregatorBaseDescriptor</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</A></DL> |
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| 107 | </PRE> |
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| 108 | |
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| 109 | <P> |
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| 110 | This class implements the common functionalities of |
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| 111 | the subclasses of ValueAggregatorDescriptor class. |
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| 112 | <P> |
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| 113 | |
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| 114 | <P> |
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| 115 | <HR> |
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| 116 | |
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| 117 | <P> |
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| 118 | <!-- =========== FIELD SUMMARY =========== --> |
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| 119 | |
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| 120 | <A NAME="field_summary"><!-- --></A> |
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| 121 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 122 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 123 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 124 | <B>Field Summary</B></FONT></TH> |
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| 125 | </TR> |
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| 126 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 127 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 128 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 129 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#DOUBLE_VALUE_SUM">DOUBLE_VALUE_SUM</A></B></CODE> |
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| 130 | |
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| 131 | <BR> |
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| 132 | </TD> |
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| 133 | </TR> |
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| 134 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 135 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 136 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 137 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#inputFile">inputFile</A></B></CODE> |
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| 138 | |
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| 139 | <BR> |
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| 140 | </TD> |
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| 141 | </TR> |
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| 142 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 143 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 144 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 145 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#LONG_VALUE_MAX">LONG_VALUE_MAX</A></B></CODE> |
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| 146 | |
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| 147 | <BR> |
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| 148 | </TD> |
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| 149 | </TR> |
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| 150 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 151 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 152 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 153 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#LONG_VALUE_MIN">LONG_VALUE_MIN</A></B></CODE> |
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| 154 | |
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| 155 | <BR> |
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| 156 | </TD> |
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| 157 | </TR> |
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| 158 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 159 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 160 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 161 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#LONG_VALUE_SUM">LONG_VALUE_SUM</A></B></CODE> |
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| 162 | |
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| 163 | <BR> |
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| 164 | </TD> |
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| 165 | </TR> |
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| 166 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 167 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 168 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 169 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#STRING_VALUE_MAX">STRING_VALUE_MAX</A></B></CODE> |
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| 170 | |
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| 171 | <BR> |
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| 172 | </TD> |
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| 173 | </TR> |
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| 174 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 175 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 176 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 177 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#STRING_VALUE_MIN">STRING_VALUE_MIN</A></B></CODE> |
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| 178 | |
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| 179 | <BR> |
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| 180 | </TD> |
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| 181 | </TR> |
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| 182 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 183 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 184 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 185 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#UNIQ_VALUE_COUNT">UNIQ_VALUE_COUNT</A></B></CODE> |
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| 186 | |
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| 187 | <BR> |
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| 188 | </TD> |
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| 189 | </TR> |
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| 190 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 191 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 192 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
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| 193 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#VALUE_HISTOGRAM">VALUE_HISTOGRAM</A></B></CODE> |
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| 194 | |
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| 195 | <BR> |
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| 196 | </TD> |
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| 197 | </TR> |
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| 198 | </TABLE> |
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| 199 | <A NAME="fields_inherited_from_class_org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorDescriptor"><!-- --></A> |
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| 200 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 201 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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| 202 | <TH ALIGN="left"><B>Fields inherited from interface org.apache.hadoop.mapred.lib.aggregate.<A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</A></B></TH> |
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| 203 | </TR> |
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| 204 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 205 | <TD><CODE><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html#ONE">ONE</A>, <A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html#TYPE_SEPARATOR">TYPE_SEPARATOR</A></CODE></TD> |
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| 206 | </TR> |
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| 207 | </TABLE> |
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| 208 | |
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| 209 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| 210 | |
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| 211 | <A NAME="constructor_summary"><!-- --></A> |
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| 212 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 213 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 214 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 215 | <B>Constructor Summary</B></FONT></TH> |
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| 216 | </TR> |
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| 217 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 218 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#ValueAggregatorBaseDescriptor()">ValueAggregatorBaseDescriptor</A></B>()</CODE> |
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| 219 | |
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| 220 | <BR> |
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| 221 | </TD> |
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| 222 | </TR> |
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| 223 | </TABLE> |
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| 224 | |
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| 225 | <!-- ========== METHOD SUMMARY =========== --> |
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| 226 | |
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| 227 | <A NAME="method_summary"><!-- --></A> |
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| 228 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 229 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 230 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 231 | <B>Method Summary</B></FONT></TH> |
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| 232 | </TR> |
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| 233 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 234 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 235 | <CODE> void</CODE></FONT></TD> |
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| 236 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#configure(org.apache.hadoop.mapred.JobConf)">configure</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job)</CODE> |
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| 237 | |
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| 238 | <BR> |
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| 239 | get the input file name.</TD> |
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| 240 | </TR> |
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| 241 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 242 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 243 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</A><<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>></CODE></FONT></TD> |
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| 244 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#generateEntry(java.lang.String, java.lang.String, org.apache.hadoop.io.Text)">generateEntry</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> type, |
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| 245 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> id, |
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| 246 | <A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A> val)</CODE> |
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| 247 | |
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| 248 | <BR> |
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| 249 | </TD> |
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| 250 | </TR> |
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| 251 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 252 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 253 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</A><<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>>></CODE></FONT></TD> |
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| 254 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#generateKeyValPairs(java.lang.Object, java.lang.Object)">generateKeyValPairs</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key, |
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| 255 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> val)</CODE> |
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| 256 | |
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| 257 | <BR> |
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| 258 | Generate 1 or 2 aggregation-id/value pairs for the given key/value pair.</TD> |
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| 259 | </TR> |
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| 260 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 261 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 262 | <CODE>static <A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregator.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregator</A></CODE></FONT></TD> |
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| 263 | <TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html#generateValueAggregator(java.lang.String)">generateValueAggregator</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> type)</CODE> |
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| 264 | |
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| 265 | <BR> |
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| 266 | </TD> |
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| 267 | </TR> |
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| 268 | </TABLE> |
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| 269 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
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| 270 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 271 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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| 272 | <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
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| 273 | </TR> |
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| 274 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 275 | <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
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| 276 | </TR> |
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| 277 | </TABLE> |
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| 278 | |
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| 279 | <P> |
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| 280 | |
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| 281 | <!-- ============ FIELD DETAIL =========== --> |
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| 282 | |
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| 283 | <A NAME="field_detail"><!-- --></A> |
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| 284 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 285 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 286 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 287 | <B>Field Detail</B></FONT></TH> |
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| 288 | </TR> |
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| 289 | </TABLE> |
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| 290 | |
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| 291 | <A NAME="UNIQ_VALUE_COUNT"><!-- --></A><H3> |
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| 292 | UNIQ_VALUE_COUNT</H3> |
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| 293 | <PRE> |
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| 294 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>UNIQ_VALUE_COUNT</B></PRE> |
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| 295 | <DL> |
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| 296 | <DL> |
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| 297 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.UNIQ_VALUE_COUNT">Constant Field Values</A></DL> |
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| 298 | </DL> |
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| 299 | <HR> |
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| 300 | |
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| 301 | <A NAME="LONG_VALUE_SUM"><!-- --></A><H3> |
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| 302 | LONG_VALUE_SUM</H3> |
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| 303 | <PRE> |
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| 304 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>LONG_VALUE_SUM</B></PRE> |
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| 305 | <DL> |
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| 306 | <DL> |
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| 307 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.LONG_VALUE_SUM">Constant Field Values</A></DL> |
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| 308 | </DL> |
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| 309 | <HR> |
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| 310 | |
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| 311 | <A NAME="DOUBLE_VALUE_SUM"><!-- --></A><H3> |
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| 312 | DOUBLE_VALUE_SUM</H3> |
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| 313 | <PRE> |
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| 314 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>DOUBLE_VALUE_SUM</B></PRE> |
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| 315 | <DL> |
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| 316 | <DL> |
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| 317 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.DOUBLE_VALUE_SUM">Constant Field Values</A></DL> |
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| 318 | </DL> |
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| 319 | <HR> |
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| 320 | |
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| 321 | <A NAME="VALUE_HISTOGRAM"><!-- --></A><H3> |
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| 322 | VALUE_HISTOGRAM</H3> |
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| 323 | <PRE> |
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| 324 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>VALUE_HISTOGRAM</B></PRE> |
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| 325 | <DL> |
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| 326 | <DL> |
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| 327 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.VALUE_HISTOGRAM">Constant Field Values</A></DL> |
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| 328 | </DL> |
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| 329 | <HR> |
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| 330 | |
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| 331 | <A NAME="LONG_VALUE_MAX"><!-- --></A><H3> |
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| 332 | LONG_VALUE_MAX</H3> |
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| 333 | <PRE> |
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| 334 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>LONG_VALUE_MAX</B></PRE> |
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| 335 | <DL> |
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| 336 | <DL> |
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| 337 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.LONG_VALUE_MAX">Constant Field Values</A></DL> |
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| 338 | </DL> |
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| 339 | <HR> |
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| 340 | |
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| 341 | <A NAME="LONG_VALUE_MIN"><!-- --></A><H3> |
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| 342 | LONG_VALUE_MIN</H3> |
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| 343 | <PRE> |
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| 344 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>LONG_VALUE_MIN</B></PRE> |
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| 345 | <DL> |
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| 346 | <DL> |
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| 347 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.LONG_VALUE_MIN">Constant Field Values</A></DL> |
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| 348 | </DL> |
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| 349 | <HR> |
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| 350 | |
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| 351 | <A NAME="STRING_VALUE_MAX"><!-- --></A><H3> |
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| 352 | STRING_VALUE_MAX</H3> |
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| 353 | <PRE> |
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| 354 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>STRING_VALUE_MAX</B></PRE> |
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| 355 | <DL> |
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| 356 | <DL> |
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| 357 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.STRING_VALUE_MAX">Constant Field Values</A></DL> |
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| 358 | </DL> |
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| 359 | <HR> |
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| 360 | |
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| 361 | <A NAME="STRING_VALUE_MIN"><!-- --></A><H3> |
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| 362 | STRING_VALUE_MIN</H3> |
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| 363 | <PRE> |
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| 364 | public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>STRING_VALUE_MIN</B></PRE> |
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| 365 | <DL> |
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| 366 | <DL> |
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| 367 | <DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor.STRING_VALUE_MIN">Constant Field Values</A></DL> |
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| 368 | </DL> |
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| 369 | <HR> |
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| 370 | |
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| 371 | <A NAME="inputFile"><!-- --></A><H3> |
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| 372 | inputFile</H3> |
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| 373 | <PRE> |
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| 374 | public <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>inputFile</B></PRE> |
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| 375 | <DL> |
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| 376 | <DL> |
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| 377 | </DL> |
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| 378 | </DL> |
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| 379 | |
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| 380 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| 381 | |
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| 382 | <A NAME="constructor_detail"><!-- --></A> |
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| 383 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 384 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 385 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 386 | <B>Constructor Detail</B></FONT></TH> |
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| 387 | </TR> |
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| 388 | </TABLE> |
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| 389 | |
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| 390 | <A NAME="ValueAggregatorBaseDescriptor()"><!-- --></A><H3> |
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| 391 | ValueAggregatorBaseDescriptor</H3> |
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| 392 | <PRE> |
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| 393 | public <B>ValueAggregatorBaseDescriptor</B>()</PRE> |
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| 394 | <DL> |
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| 395 | </DL> |
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| 396 | |
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| 397 | <!-- ============ METHOD DETAIL ========== --> |
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| 398 | |
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| 399 | <A NAME="method_detail"><!-- --></A> |
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| 400 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 401 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 402 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 403 | <B>Method Detail</B></FONT></TH> |
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| 404 | </TR> |
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| 405 | </TABLE> |
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| 406 | |
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| 407 | <A NAME="generateEntry(java.lang.String, java.lang.String, org.apache.hadoop.io.Text)"><!-- --></A><H3> |
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| 408 | generateEntry</H3> |
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| 409 | <PRE> |
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| 410 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</A><<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>> <B>generateEntry</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> type, |
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| 411 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> id, |
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| 412 | <A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A> val)</PRE> |
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| 413 | <DL> |
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| 414 | <DD><DL> |
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| 415 | </DL> |
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| 416 | </DD> |
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| 417 | <DD><DL> |
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| 418 | <DT><B>Parameters:</B><DD><CODE>type</CODE> - the aggregation type<DD><CODE>id</CODE> - the aggregation id<DD><CODE>val</CODE> - the val associated with the id to be aggregated |
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| 419 | <DT><B>Returns:</B><DD>an Entry whose key is the aggregation id prefixed with |
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| 420 | the aggregation type.</DL> |
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| 421 | </DD> |
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| 422 | </DL> |
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| 423 | <HR> |
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| 424 | |
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| 425 | <A NAME="generateValueAggregator(java.lang.String)"><!-- --></A><H3> |
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| 426 | generateValueAggregator</H3> |
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| 427 | <PRE> |
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| 428 | public static <A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregator.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregator</A> <B>generateValueAggregator</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> type)</PRE> |
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| 429 | <DL> |
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| 430 | <DD><DL> |
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| 431 | </DL> |
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| 432 | </DD> |
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| 433 | <DD><DL> |
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| 434 | <DT><B>Parameters:</B><DD><CODE>type</CODE> - the aggregation type |
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| 435 | <DT><B>Returns:</B><DD>a value aggregator of the given type.</DL> |
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| 436 | </DD> |
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| 437 | </DL> |
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| 438 | <HR> |
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| 439 | |
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| 440 | <A NAME="generateKeyValPairs(java.lang.Object, java.lang.Object)"><!-- --></A><H3> |
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| 441 | generateKeyValPairs</H3> |
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| 442 | <PRE> |
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| 443 | public <A HREF="http://java.sun.com/javase/6/docs/api/java/util/ArrayList.html?is-external=true" title="class or interface in java.util">ArrayList</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</A><<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>>> <B>generateKeyValPairs</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key, |
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| 444 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> val)</PRE> |
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| 445 | <DL> |
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| 446 | <DD>Generate 1 or 2 aggregation-id/value pairs for the given key/value pair. |
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| 447 | The first id will be of type LONG_VALUE_SUM, with "record_count" as |
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| 448 | its aggregation id. If the input is a file split, |
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| 449 | the second id of the same type will be generated too, with the file name |
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| 450 | as its aggregation id. This achieves the behavior of counting the total number |
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| 451 | of records in the input data, and the number of records in each input file. |
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| 452 | <P> |
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| 453 | <DD><DL> |
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| 454 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html#generateKeyValPairs(java.lang.Object, java.lang.Object)">generateKeyValPairs</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</A></CODE></DL> |
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| 455 | </DD> |
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| 456 | <DD><DL> |
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| 457 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - input key<DD><CODE>val</CODE> - input value |
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| 458 | <DT><B>Returns:</B><DD>a list of aggregation id/value pairs. An aggregation id encodes an |
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| 459 | aggregation type which is used to guide the way to aggregate the |
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| 460 | value in the reduce/combiner phrase of an Aggregate based job.</DL> |
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| 461 | </DD> |
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| 462 | </DL> |
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| 463 | <HR> |
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| 464 | |
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| 465 | <A NAME="configure(org.apache.hadoop.mapred.JobConf)"><!-- --></A><H3> |
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| 466 | configure</H3> |
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| 467 | <PRE> |
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| 468 | public void <B>configure</B>(<A HREF="../../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job)</PRE> |
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| 469 | <DL> |
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| 470 | <DD>get the input file name. |
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| 471 | <P> |
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| 472 | <DD><DL> |
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| 473 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html#configure(org.apache.hadoop.mapred.JobConf)">configure</A></CODE> in interface <CODE><A HREF="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</A></CODE></DL> |
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| 474 | </DD> |
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| 475 | <DD><DL> |
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| 476 | <DT><B>Parameters:</B><DD><CODE>job</CODE> - a job configuration object</DL> |
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| 477 | </DD> |
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| 478 | </DL> |
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| 479 | <!-- ========= END OF CLASS DATA ========= --> |
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