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