source: proiecte/HadoopJUnit/hadoop-0.20.1/docs/api/org/apache/hadoop/mapreduce/MapContext.html @ 120

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7MapContext (Hadoop 0.20.1 API)
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79  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#fields_inherited_from_class_org.apache.hadoop.mapreduce.JobContext">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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89<H2>
90<FONT SIZE="-1">
91org.apache.hadoop.mapreduce</FONT>
92<BR>
93Class MapContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</H2>
94<PRE>
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>
96  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce.JobContext</A>
97      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce.TaskAttemptContext</A>
98          <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce.TaskInputOutputContext</A>&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;
99              <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapreduce.MapContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</B>
100</PRE>
101<DL>
102<DT><DT><B>Type Parameters:</B><DD><CODE>KEYIN</CODE> - the key input type to the Mapper<DD><CODE>VALUEIN</CODE> - the value input type to the Mapper<DD><CODE>KEYOUT</CODE> - the key output type from the Mapper<DD><CODE>VALUEOUT</CODE> - the value output type from the Mapper</DL>
103<DL>
104<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/apache/hadoop/util/Progressable.html" title="interface in org.apache.hadoop.util">Progressable</A></DD>
105</DL>
106<DL>
107<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.Context.html" title="class in org.apache.hadoop.mapreduce">Mapper.Context</A></DD>
108</DL>
109<HR>
110<DL>
111<DT><PRE>public class <B>MapContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</B><DT>extends <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext</A>&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</DL>
112</PRE>
113
114<P>
115The context that is given to the <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.
116<P>
117
118<P>
119<HR>
120
121<P>
122<!-- =========== FIELD SUMMARY =========== -->
123
124<A NAME="field_summary"><!-- --></A>
125<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
126<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
127<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
128<B>Field Summary</B></FONT></TH>
129</TR>
130</TABLE>
131&nbsp;<A NAME="fields_inherited_from_class_org.apache.hadoop.mapreduce.JobContext"><!-- --></A>
132<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
133<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
134<TH ALIGN="left"><B>Fields inherited from class org.apache.hadoop.mapreduce.<A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">JobContext</A></B></TH>
135</TR>
136<TR BGCOLOR="white" CLASS="TableRowColor">
137<TD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#COMBINE_CLASS_ATTR">COMBINE_CLASS_ATTR</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#conf">conf</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#INPUT_FORMAT_CLASS_ATTR">INPUT_FORMAT_CLASS_ATTR</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#MAP_CLASS_ATTR">MAP_CLASS_ATTR</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#OUTPUT_FORMAT_CLASS_ATTR">OUTPUT_FORMAT_CLASS_ATTR</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#PARTITIONER_CLASS_ATTR">PARTITIONER_CLASS_ATTR</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#REDUCE_CLASS_ATTR">REDUCE_CLASS_ATTR</A></CODE></TD>
138</TR>
139</TABLE>
140&nbsp;
141<!-- ======== CONSTRUCTOR SUMMARY ======== -->
142
143<A NAME="constructor_summary"><!-- --></A>
144<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
145<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
146<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
147<B>Constructor Summary</B></FONT></TH>
148</TR>
149<TR BGCOLOR="white" CLASS="TableRowColor">
150<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html#MapContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID, org.apache.hadoop.mapreduce.RecordReader, org.apache.hadoop.mapreduce.RecordWriter, org.apache.hadoop.mapreduce.OutputCommitter, org.apache.hadoop.mapreduce.StatusReporter, org.apache.hadoop.mapreduce.InputSplit)">MapContext</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
151           <A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A>&nbsp;taskid,
152           <A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A>&gt;&nbsp;reader,
153           <A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYOUT</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEOUT</A>&gt;&nbsp;writer,
154           <A HREF="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A>&nbsp;committer,
155           <A HREF="../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A>&nbsp;reporter,
156           <A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A>&nbsp;split)</CODE>
157
158<BR>
159&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
160</TR>
161</TABLE>
162&nbsp;
163<!-- ========== METHOD SUMMARY =========== -->
164
165<A NAME="method_summary"><!-- --></A>
166<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
167<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
168<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
169<B>Method Summary</B></FONT></TH>
170</TR>
171<TR BGCOLOR="white" CLASS="TableRowColor">
172<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
173<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A></CODE></FONT></TD>
174<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html#getCurrentKey()">getCurrentKey</A></B>()</CODE>
175
176<BR>
177&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the current key.</TD>
178</TR>
179<TR BGCOLOR="white" CLASS="TableRowColor">
180<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
181<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A></CODE></FONT></TD>
182<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html#getCurrentValue()">getCurrentValue</A></B>()</CODE>
183
184<BR>
185&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the current value.</TD>
186</TR>
187<TR BGCOLOR="white" CLASS="TableRowColor">
188<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
189<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A></CODE></FONT></TD>
190<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html#getInputSplit()">getInputSplit</A></B>()</CODE>
191
192<BR>
193&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the input split for this map.</TD>
194</TR>
195<TR BGCOLOR="white" CLASS="TableRowColor">
196<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
197<CODE>&nbsp;boolean</CODE></FONT></TD>
198<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html#nextKeyValue()">nextKeyValue</A></B>()</CODE>
199
200<BR>
201&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Advance to the next key, value pair, returning null if at end.</TD>
202</TR>
203</TABLE>
204&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapreduce.TaskInputOutputContext"><!-- --></A>
205<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
206<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
207<TH ALIGN="left"><B>Methods inherited from class org.apache.hadoop.mapreduce.<A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext</A></B></TH>
208</TR>
209<TR BGCOLOR="white" CLASS="TableRowColor">
210<TD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCounter(java.lang.Enum)">getCounter</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCounter(java.lang.String, java.lang.String)">getCounter</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getOutputCommitter()">getOutputCommitter</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#progress()">progress</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#setStatus(java.lang.String)">setStatus</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#write(KEYOUT, VALUEOUT)">write</A></CODE></TD>
211</TR>
212</TABLE>
213&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapreduce.TaskAttemptContext"><!-- --></A>
214<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
215<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
216<TH ALIGN="left"><B>Methods inherited from class org.apache.hadoop.mapreduce.<A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptContext</A></B></TH>
217</TR>
218<TR BGCOLOR="white" CLASS="TableRowColor">
219<TD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html#getStatus()">getStatus</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html#getTaskAttemptID()">getTaskAttemptID</A></CODE></TD>
220</TR>
221</TABLE>
222&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapreduce.JobContext"><!-- --></A>
223<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
224<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
225<TH ALIGN="left"><B>Methods inherited from class org.apache.hadoop.mapreduce.<A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">JobContext</A></B></TH>
226</TR>
227<TR BGCOLOR="white" CLASS="TableRowColor">
228<TD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getCombinerClass()">getCombinerClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getConfiguration()">getConfiguration</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getGroupingComparator()">getGroupingComparator</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getInputFormatClass()">getInputFormatClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getJar()">getJar</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getJobID()">getJobID</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getJobName()">getJobName</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getMapOutputKeyClass()">getMapOutputKeyClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getMapOutputValueClass()">getMapOutputValueClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getMapperClass()">getMapperClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getNumReduceTasks()">getNumReduceTasks</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getOutputFormatClass()">getOutputFormatClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getOutputKeyClass()">getOutputKeyClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getOutputValueClass()">getOutputValueClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getPartitionerClass()">getPartitionerClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getReducerClass()">getReducerClass</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getSortComparator()">getSortComparator</A>, <A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html#getWorkingDirectory()">getWorkingDirectory</A></CODE></TD>
229</TR>
230</TABLE>
231&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
232<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
233<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
234<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>
235</TR>
236<TR BGCOLOR="white" CLASS="TableRowColor">
237<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>
238</TR>
239</TABLE>
240&nbsp;
241<P>
242
243<!-- ========= CONSTRUCTOR DETAIL ======== -->
244
245<A NAME="constructor_detail"><!-- --></A>
246<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
247<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
248<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
249<B>Constructor Detail</B></FONT></TH>
250</TR>
251</TABLE>
252
253<A NAME="MapContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID, org.apache.hadoop.mapreduce.RecordReader, org.apache.hadoop.mapreduce.RecordWriter, org.apache.hadoop.mapreduce.OutputCommitter, org.apache.hadoop.mapreduce.StatusReporter, org.apache.hadoop.mapreduce.InputSplit)"><!-- --></A><H3>
254MapContext</H3>
255<PRE>
256public <B>MapContext</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
257                  <A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A>&nbsp;taskid,
258                  <A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A>&gt;&nbsp;reader,
259                  <A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYOUT</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEOUT</A>&gt;&nbsp;writer,
260                  <A HREF="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A>&nbsp;committer,
261                  <A HREF="../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A>&nbsp;reporter,
262                  <A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A>&nbsp;split)</PRE>
263<DL>
264</DL>
265
266<!-- ============ METHOD DETAIL ========== -->
267
268<A NAME="method_detail"><!-- --></A>
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272<B>Method Detail</B></FONT></TH>
273</TR>
274</TABLE>
275
276<A NAME="getInputSplit()"><!-- --></A><H3>
277getInputSplit</H3>
278<PRE>
279public <A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A> <B>getInputSplit</B>()</PRE>
280<DL>
281<DD>Get the input split for this map.
282<P>
283<DD><DL>
284</DL>
285</DD>
286</DL>
287<HR>
288
289<A NAME="getCurrentKey()"><!-- --></A><H3>
290getCurrentKey</H3>
291<PRE>
292public <A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A> <B>getCurrentKey</B>()
293                    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>,
294                           <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></PRE>
295<DL>
296<DD><B>Description copied from class: <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCurrentKey()">TaskInputOutputContext</A></CODE></B></DD>
297<DD>Get the current key.
298<P>
299<DD><DL>
300<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCurrentKey()">getCurrentKey</A></CODE> in class <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYOUT</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEOUT</A>&gt;</CODE></DL>
301</DD>
302<DD><DL>
303
304<DT><B>Returns:</B><DD>the current key object or null if there isn't one
305<DT><B>Throws:</B>
306<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>
307<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE></DL>
308</DD>
309</DL>
310<HR>
311
312<A NAME="getCurrentValue()"><!-- --></A><H3>
313getCurrentValue</H3>
314<PRE>
315public <A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A> <B>getCurrentValue</B>()
316                        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>,
317                               <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></PRE>
318<DL>
319<DD><B>Description copied from class: <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCurrentValue()">TaskInputOutputContext</A></CODE></B></DD>
320<DD>Get the current value.
321<P>
322<DD><DL>
323<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#getCurrentValue()">getCurrentValue</A></CODE> in class <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYOUT</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEOUT</A>&gt;</CODE></DL>
324</DD>
325<DD><DL>
326
327<DT><B>Returns:</B><DD>the value object that was read into
328<DT><B>Throws:</B>
329<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>
330<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE></DL>
331</DD>
332</DL>
333<HR>
334
335<A NAME="nextKeyValue()"><!-- --></A><H3>
336nextKeyValue</H3>
337<PRE>
338public boolean <B>nextKeyValue</B>()
339                     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>,
340                            <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></PRE>
341<DL>
342<DD><B>Description copied from class: <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#nextKeyValue()">TaskInputOutputContext</A></CODE></B></DD>
343<DD>Advance to the next key, value pair, returning null if at end.
344<P>
345<DD><DL>
346<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html#nextKeyValue()">nextKeyValue</A></CODE> in class <CODE><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEIN</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">KEYOUT</A>,<A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="type parameter in MapContext">VALUEOUT</A>&gt;</CODE></DL>
347</DD>
348<DD><DL>
349
350<DT><B>Returns:</B><DD>the key object that was read into, or null if no more
351<DT><B>Throws:</B>
352<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>
353<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE></DL>
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