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| 7 | ComposableRecordReader (Hadoop 0.20.1 API) |
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| 89 | <H2> |
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| 90 | <FONT SIZE="-1"> |
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| 91 | org.apache.hadoop.mapred.join</FONT> |
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| 92 | <BR> |
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| 93 | Interface ComposableRecordReader<K extends <A HREF="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</A>,V extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>></H2> |
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| 94 | <DL> |
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| 95 | <DT><B>All Superinterfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A><K,?>>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A><K,V></DD> |
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| 96 | </DL> |
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| 97 | <DL> |
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| 98 | <DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../../org/apache/hadoop/mapred/join/InnerJoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">InnerJoinRecordReader</A>, <A HREF="../../../../../org/apache/hadoop/mapred/join/JoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">JoinRecordReader</A>, <A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="class in org.apache.hadoop.mapred.join">MultiFilterRecordReader</A>, <A HREF="../../../../../org/apache/hadoop/mapred/join/OuterJoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">OuterJoinRecordReader</A>, <A HREF="../../../../../org/apache/hadoop/mapred/join/OverrideRecordReader.html" title="class in org.apache.hadoop.mapred.join">OverrideRecordReader</A>, <A HREF="../../../../../org/apache/hadoop/mapred/join/WrappedRecordReader.html" title="class in org.apache.hadoop.mapred.join">WrappedRecordReader</A></DD> |
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| 99 | </DL> |
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| 100 | <HR> |
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| 101 | <DL> |
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| 102 | <DT><PRE>public interface <B>ComposableRecordReader<K extends <A HREF="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</A>,V extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>></B><DT>extends <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A><K,V>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A><<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A><K,?>></DL> |
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| 103 | </PRE> |
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| 104 | |
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| 105 | <P> |
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| 106 | Additional operations required of a RecordReader to participate in a join. |
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| 107 | <P> |
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| 108 | |
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| 109 | <P> |
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| 110 | <HR> |
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| 111 | |
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| 112 | <P> |
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| 114 | <!-- ========== METHOD SUMMARY =========== --> |
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| 120 | <B>Method Summary</B></FONT></TH> |
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| 122 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 123 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 124 | <CODE> void</CODE></FONT></TD> |
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| 125 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector, K)">accept</A></B>(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector jc, |
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| 126 | <A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key)</CODE> |
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| 127 | |
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| 128 | <BR> |
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| 129 | While key-value pairs from this RecordReader match the given key, register |
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| 130 | them with the JoinCollector provided.</TD> |
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| 131 | </TR> |
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| 132 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 133 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 134 | <CODE> boolean</CODE></FONT></TD> |
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| 135 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#hasNext()">hasNext</A></B>()</CODE> |
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| 136 | |
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| 137 | <BR> |
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| 138 | Returns true if the stream is not empty, but provides no guarantee that |
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| 139 | a call to next(K,V) will succeed.</TD> |
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| 140 | </TR> |
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| 141 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 142 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 143 | <CODE> int</CODE></FONT></TD> |
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| 144 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#id()">id</A></B>()</CODE> |
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| 145 | |
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| 146 | <BR> |
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| 147 | Return the position in the collector this class occupies.</TD> |
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| 148 | </TR> |
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| 149 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 150 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 151 | <CODE> <A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A></CODE></FONT></TD> |
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| 152 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#key()">key</A></B>()</CODE> |
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| 153 | |
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| 154 | <BR> |
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| 155 | Return the key this RecordReader would supply on a call to next(K,V)</TD> |
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| 156 | </TR> |
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| 157 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 158 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 159 | <CODE> void</CODE></FONT></TD> |
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| 160 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#key(K)">key</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key)</CODE> |
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| 161 | |
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| 162 | <BR> |
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| 163 | Clone the key at the head of this RecordReader into the object provided.</TD> |
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| 164 | </TR> |
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| 165 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 166 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 167 | <CODE> void</CODE></FONT></TD> |
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| 168 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html#skip(K)">skip</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key)</CODE> |
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| 169 | |
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| 170 | <BR> |
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| 171 | Skip key-value pairs with keys less than or equal to the key provided.</TD> |
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| 172 | </TR> |
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| 173 | </TABLE> |
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| 174 | <A NAME="methods_inherited_from_class_org.apache.hadoop.mapred.RecordReader"><!-- --></A> |
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| 175 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 176 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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| 177 | <TH ALIGN="left"><B>Methods inherited from interface org.apache.hadoop.mapred.<A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A></B></TH> |
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| 178 | </TR> |
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| 179 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 180 | <TD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#close()">close</A>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#createKey()">createKey</A>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#createValue()">createValue</A>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#getPos()">getPos</A>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#getProgress()">getProgress</A>, <A HREF="../../../../../org/apache/hadoop/mapred/RecordReader.html#next(K, V)">next</A></CODE></TD> |
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| 181 | </TR> |
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| 182 | </TABLE> |
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| 183 | <A NAME="methods_inherited_from_class_java.lang.Comparable"><!-- --></A> |
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| 184 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 186 | <TH ALIGN="left"><B>Methods inherited from interface java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A></B></TH> |
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| 187 | </TR> |
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| 188 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 189 | <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true#compareTo(T)" title="class or interface in java.lang">compareTo</A></CODE></TD> |
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| 190 | </TR> |
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| 191 | </TABLE> |
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| 192 | |
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| 193 | <P> |
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| 194 | |
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| 195 | <!-- ============ METHOD DETAIL ========== --> |
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| 201 | <B>Method Detail</B></FONT></TH> |
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| 202 | </TR> |
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| 203 | </TABLE> |
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| 204 | |
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| 205 | <A NAME="id()"><!-- --></A><H3> |
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| 206 | id</H3> |
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| 207 | <PRE> |
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| 208 | int <B>id</B>()</PRE> |
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| 209 | <DL> |
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| 210 | <DD>Return the position in the collector this class occupies. |
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| 211 | <P> |
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| 212 | <DD><DL> |
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| 213 | </DL> |
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| 214 | </DD> |
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| 215 | <DD><DL> |
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| 216 | </DL> |
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| 217 | </DD> |
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| 218 | </DL> |
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| 219 | <HR> |
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| 220 | |
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| 221 | <A NAME="key()"><!-- --></A><H3> |
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| 222 | key</H3> |
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| 223 | <PRE> |
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| 224 | <A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> <B>key</B>()</PRE> |
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| 225 | <DL> |
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| 226 | <DD>Return the key this RecordReader would supply on a call to next(K,V) |
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| 227 | <P> |
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| 228 | <DD><DL> |
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| 229 | </DL> |
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| 230 | </DD> |
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| 231 | <DD><DL> |
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| 232 | </DL> |
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| 233 | </DD> |
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| 234 | </DL> |
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| 235 | <HR> |
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| 236 | |
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| 237 | <A NAME="key(org.apache.hadoop.io.WritableComparable)"><!-- --></A><A NAME="key(K)"><!-- --></A><H3> |
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| 238 | key</H3> |
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| 239 | <PRE> |
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| 240 | void <B>key</B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key) |
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| 241 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 242 | <DL> |
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| 243 | <DD>Clone the key at the head of this RecordReader into the object provided. |
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| 244 | <P> |
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| 245 | <DD><DL> |
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| 246 | </DL> |
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| 247 | </DD> |
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| 248 | <DD><DL> |
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| 249 | |
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| 250 | <DT><B>Throws:</B> |
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| 251 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 252 | </DD> |
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| 253 | </DL> |
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| 254 | <HR> |
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| 255 | |
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| 256 | <A NAME="hasNext()"><!-- --></A><H3> |
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| 257 | hasNext</H3> |
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| 258 | <PRE> |
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| 259 | boolean <B>hasNext</B>()</PRE> |
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| 260 | <DL> |
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| 261 | <DD>Returns true if the stream is not empty, but provides no guarantee that |
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| 262 | a call to next(K,V) will succeed. |
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| 263 | <P> |
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| 264 | <DD><DL> |
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| 265 | </DL> |
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| 266 | </DD> |
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| 267 | <DD><DL> |
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| 268 | </DL> |
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| 269 | </DD> |
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| 270 | </DL> |
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| 271 | <HR> |
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| 272 | |
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| 273 | <A NAME="skip(org.apache.hadoop.io.WritableComparable)"><!-- --></A><A NAME="skip(K)"><!-- --></A><H3> |
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| 274 | skip</H3> |
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| 275 | <PRE> |
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| 276 | void <B>skip</B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key) |
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| 277 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 278 | <DL> |
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| 279 | <DD>Skip key-value pairs with keys less than or equal to the key provided. |
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| 280 | <P> |
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| 281 | <DD><DL> |
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| 282 | </DL> |
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| 283 | </DD> |
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| 284 | <DD><DL> |
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| 285 | |
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| 286 | <DT><B>Throws:</B> |
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| 287 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 288 | </DD> |
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| 289 | </DL> |
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| 290 | <HR> |
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| 291 | |
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| 292 | <A NAME="accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector,org.apache.hadoop.io.WritableComparable)"><!-- --></A><A NAME="accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector, K)"><!-- --></A><H3> |
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| 293 | accept</H3> |
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| 294 | <PRE> |
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| 295 | void <B>accept</B>(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector jc, |
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| 296 | <A HREF="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="type parameter in ComposableRecordReader">K</A> key) |
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| 297 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 298 | <DL> |
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| 299 | <DD>While key-value pairs from this RecordReader match the given key, register |
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| 300 | them with the JoinCollector provided. |
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| 301 | <P> |
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| 302 | <DD><DL> |
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| 303 | </DL> |
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| 304 | </DD> |
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| 305 | <DD><DL> |
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| 306 | |
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| 307 | <DT><B>Throws:</B> |
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| 308 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 309 | </DD> |
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| 310 | </DL> |
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| 324 | <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> |
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