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7Uses of Interface org.apache.hadoop.mapred.join.ComposableRecordReader (Hadoop 0.20.1 API)
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83<H2>
84<B>Uses of Interface<br>org.apache.hadoop.mapred.join.ComposableRecordReader</B></H2>
85</CENTER>
86
87<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
88<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
89<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
90Packages that use <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
91</TR>
92<TR BGCOLOR="white" CLASS="TableRowColor">
93<TD><A HREF="#org.apache.hadoop.mapred.join"><B>org.apache.hadoop.mapred.join</B></A></TD>
94<TD>Given a set of sorted datasets keyed with the same class and yielding equal
95partitions, it is possible to effect a join of those datasets prior to the map.&nbsp;</TD>
96</TR>
97</TABLE>
98&nbsp;
99<P>
100<A NAME="org.apache.hadoop.mapred.join"><!-- --></A>
101<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
102<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
103<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
104Uses of <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A> in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A></FONT></TH>
105</TR>
106</TABLE>
107&nbsp;
108<P>
109
110<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
111<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
112<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> that implement <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
113</TR>
114<TR BGCOLOR="white" CLASS="TableRowColor">
115<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
116<CODE>&nbsp;class</CODE></FONT></TD>
117<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/InnerJoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">InnerJoinRecordReader&lt;K extends WritableComparable&gt;</A></B></CODE>
118
119<BR>
120&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Full inner join.</TD>
121</TR>
122<TR BGCOLOR="white" CLASS="TableRowColor">
123<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
124<CODE>&nbsp;class</CODE></FONT></TD>
125<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/JoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">JoinRecordReader&lt;K extends WritableComparable&gt;</A></B></CODE>
126
127<BR>
128&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Base class for Composite joins returning Tuples of arbitrary Writables.</TD>
129</TR>
130<TR BGCOLOR="white" CLASS="TableRowColor">
131<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
132<CODE>&nbsp;class</CODE></FONT></TD>
133<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="class in org.apache.hadoop.mapred.join">MultiFilterRecordReader&lt;K extends WritableComparable,V extends Writable&gt;</A></B></CODE>
134
135<BR>
136&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Base class for Composite join returning values derived from multiple
137 sources, but generally not tuples.</TD>
138</TR>
139<TR BGCOLOR="white" CLASS="TableRowColor">
140<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
141<CODE>&nbsp;class</CODE></FONT></TD>
142<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/OuterJoinRecordReader.html" title="class in org.apache.hadoop.mapred.join">OuterJoinRecordReader&lt;K extends WritableComparable&gt;</A></B></CODE>
143
144<BR>
145&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Full outer join.</TD>
146</TR>
147<TR BGCOLOR="white" CLASS="TableRowColor">
148<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
149<CODE>&nbsp;class</CODE></FONT></TD>
150<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/OverrideRecordReader.html" title="class in org.apache.hadoop.mapred.join">OverrideRecordReader&lt;K extends WritableComparable,V extends Writable&gt;</A></B></CODE>
151
152<BR>
153&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prefer the &quot;rightmost&quot; data source for this key.</TD>
154</TR>
155<TR BGCOLOR="white" CLASS="TableRowColor">
156<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
157<CODE>&nbsp;class</CODE></FONT></TD>
158<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/WrappedRecordReader.html" title="class in org.apache.hadoop.mapred.join">WrappedRecordReader&lt;K extends WritableComparable,U extends Writable&gt;</A></B></CODE>
159
160<BR>
161&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Proxy class for a RecordReader participating in the join framework.</TD>
162</TR>
163</TABLE>
164&nbsp;
165<P>
166
167<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
168<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
169<TH ALIGN="left" COLSPAN="2">Fields in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> declared as <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
170</TR>
171<TR BGCOLOR="white" CLASS="TableRowColor">
172<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
173<CODE>protected &nbsp;<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">K</A>,? extends <A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">V</A>&gt;[]</CODE></FONT></TD>
174<TD><CODE><B>CompositeRecordReader.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html#kids">kids</A></B></CODE>
175
176<BR>
177&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
178</TR>
179</TABLE>
180&nbsp;
181<P>
182
183<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
184<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
185<TH ALIGN="left" COLSPAN="2">Fields in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> with type parameters of type <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
186</TR>
187<TR BGCOLOR="white" CLASS="TableRowColor">
188<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
189<CODE>protected static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<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>,<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</A>&lt;? extends <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&gt;&gt;</CODE></FONT></TD>
190<TD><CODE><B>Parser.Node.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/Parser.Node.html#rrCstrMap">rrCstrMap</A></B></CODE>
191
192<BR>
193&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
194</TR>
195</TABLE>
196&nbsp;
197<P>
198
199<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
200<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
201<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> that return <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
202</TR>
203<TR BGCOLOR="white" CLASS="TableRowColor">
204<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
205<CODE>&nbsp;<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">K</A>,<A HREF="../../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</A>&gt;</CODE></FONT></TD>
206<TD><CODE><B>CompositeInputFormat.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#getRecordReader(org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.Reporter)">getRecordReader</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</A>&nbsp;split,
207                <A HREF="../../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A>&nbsp;job,
208                <A HREF="../../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)</CODE>
209
210<BR>
211&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Construct a CompositeRecordReader for the children of this InputFormat
212 as defined in the init expression.</TD>
213</TR>
214<TR BGCOLOR="white" CLASS="TableRowColor">
215<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
216<CODE>&nbsp;<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html" title="type parameter in ComposableInputFormat">K</A>,<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html" title="type parameter in ComposableInputFormat">V</A>&gt;</CODE></FONT></TD>
217<TD><CODE><B>ComposableInputFormat.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html#getRecordReader(org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.Reporter)">getRecordReader</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</A>&nbsp;split,
218                <A HREF="../../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A>&nbsp;job,
219                <A HREF="../../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)</CODE>
220
221<BR>
222&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
223</TR>
224</TABLE>
225&nbsp;
226<P>
227
228<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
229<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
230<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> that return types with arguments of type <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
231</TR>
232<TR BGCOLOR="white" CLASS="TableRowColor">
233<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
234<CODE>protected &nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/PriorityQueue.html?is-external=true" title="class or interface in java.util">PriorityQueue</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">K</A>,?&gt;&gt;</CODE></FONT></TD>
235<TD><CODE><B>CompositeRecordReader.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html#getRecordReaderQueue()">getRecordReaderQueue</A></B>()</CODE>
236
237<BR>
238&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return sorted list of RecordReaders for this composite.</TD>
239</TR>
240</TABLE>
241&nbsp;
242<P>
243
244<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
245<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
246<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> with parameters of type <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
247</TR>
248<TR BGCOLOR="white" CLASS="TableRowColor">
249<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
250<CODE>&nbsp;void</CODE></FONT></TD>
251<TD><CODE><B>CompositeRecordReader.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html#add(org.apache.hadoop.mapred.join.ComposableRecordReader)">add</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">K</A>,? extends <A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">V</A>&gt;&nbsp;rr)</CODE>
252
253<BR>
254&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add a RecordReader to this collection.</TD>
255</TR>
256<TR BGCOLOR="white" CLASS="TableRowColor">
257<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
258<CODE>&nbsp;int</CODE></FONT></TD>
259<TD><CODE><B>WrappedRecordReader.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/WrappedRecordReader.html#compareTo(org.apache.hadoop.mapred.join.ComposableRecordReader)">compareTo</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/WrappedRecordReader.html" title="type parameter in WrappedRecordReader">K</A>,?&gt;&nbsp;other)</CODE>
260
261<BR>
262&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Implement Comparable contract (compare key at head of proxied RR
263 with that of another).</TD>
264</TR>
265<TR BGCOLOR="white" CLASS="TableRowColor">
266<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
267<CODE>&nbsp;int</CODE></FONT></TD>
268<TD><CODE><B>CompositeRecordReader.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html#compareTo(org.apache.hadoop.mapred.join.ComposableRecordReader)">compareTo</A></B>(<A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&lt;<A HREF="../../../../../../org/apache/hadoop/mapred/join/CompositeRecordReader.html" title="type parameter in CompositeRecordReader">K</A>,?&gt;&nbsp;other)</CODE>
269
270<BR>
271&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Implement Comparable contract (compare key of join or head of heap
272 with that of another).</TD>
273</TR>
274</TABLE>
275&nbsp;
276<P>
277
278<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
279<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
280<TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> with type arguments of type <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A></FONT></TH>
281</TR>
282<TR BGCOLOR="white" CLASS="TableRowColor">
283<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
284<CODE>protected static&nbsp;void</CODE></FONT></TD>
285<TD><CODE><B>Parser.Node.</B><B><A HREF="../../../../../../org/apache/hadoop/mapred/join/Parser.Node.html#addIdentifier(java.lang.String, java.lang.Class[], java.lang.Class, java.lang.Class)">addIdentifier</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>&nbsp;ident,
286              <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>&lt;?&gt;[]&nbsp;mcstrSig,
287              <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>&lt;? extends <A HREF="../../../../../../org/apache/hadoop/mapred/join/Parser.Node.html" title="class in org.apache.hadoop.mapred.join">Parser.Node</A>&gt;&nbsp;nodetype,
288              <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>&lt;? extends <A HREF="../../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</A>&gt;&nbsp;cl)</CODE>
289
290<BR>
291&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For a given identifier, add a mapping to the nodetype for the parse
292 tree and to the ComposableRecordReader to be created, including the
293 formals required to invoke the constructor.</TD>
294</TR>
295</TABLE>
296&nbsp;
297<P>
298<HR>
299
300
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