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91org.apache.hadoop.examples</FONT>
92<BR>
93Class PiEstimator.PiMapper</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/mapred/MapReduceBase.html" title="class in org.apache.hadoop.mapred">org.apache.hadoop.mapred.MapReduceBase</A>
97      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.examples.PiEstimator.PiMapper</B>
98</PRE>
99<DL>
100<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A>, <A HREF="../../../../org/apache/hadoop/mapred/JobConfigurable.html" title="interface in org.apache.hadoop.mapred">JobConfigurable</A>, <A HREF="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred">Mapper</A>&lt;<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/BooleanWritable.html" title="class in org.apache.hadoop.io">BooleanWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&gt;</DD>
101</DL>
102<DL>
103<DT><B>Enclosing class:</B><DD><A HREF="../../../../org/apache/hadoop/examples/PiEstimator.html" title="class in org.apache.hadoop.examples">PiEstimator</A></DD>
104</DL>
105<HR>
106<DL>
107<DT><PRE>public static class <B>PiEstimator.PiMapper</B><DT>extends <A HREF="../../../../org/apache/hadoop/mapred/MapReduceBase.html" title="class in org.apache.hadoop.mapred">MapReduceBase</A><DT>implements <A HREF="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred">Mapper</A>&lt;<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/BooleanWritable.html" title="class in org.apache.hadoop.io">BooleanWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&gt;</DL>
108</PRE>
109
110<P>
111Mapper class for Pi estimation.
112 Generate points in a unit square
113 and then count points inside/outside of the inscribed circle of the square.
114<P>
115
116<P>
117<HR>
118
119<P>
120
121<!-- ======== CONSTRUCTOR SUMMARY ======== -->
122
123<A NAME="constructor_summary"><!-- --></A>
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127<B>Constructor Summary</B></FONT></TH>
128</TR>
129<TR BGCOLOR="white" CLASS="TableRowColor">
130<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/PiEstimator.PiMapper.html#PiEstimator.PiMapper()">PiEstimator.PiMapper</A></B>()</CODE>
131
132<BR>
133&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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143<B>Method Summary</B></FONT></TH>
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146<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
147<CODE>&nbsp;void</CODE></FONT></TD>
148<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/PiEstimator.PiMapper.html#map(org.apache.hadoop.io.LongWritable, org.apache.hadoop.io.LongWritable, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)">map</A></B>(<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&nbsp;offset,
149    <A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&nbsp;size,
150    <A HREF="../../../../org/apache/hadoop/mapred/OutputCollector.html" title="interface in org.apache.hadoop.mapred">OutputCollector</A>&lt;<A HREF="../../../../org/apache/hadoop/io/BooleanWritable.html" title="class in org.apache.hadoop.io">BooleanWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&gt;&nbsp;out,
151    <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)</CODE>
152
153<BR>
154&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Map method.</TD>
155</TR>
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157&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapred.MapReduceBase"><!-- --></A>
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194<P>
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206<A NAME="PiEstimator.PiMapper()"><!-- --></A><H3>
207PiEstimator.PiMapper</H3>
208<PRE>
209public <B>PiEstimator.PiMapper</B>()</PRE>
210<DL>
211</DL>
212
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222
223<A NAME="map(org.apache.hadoop.io.LongWritable, org.apache.hadoop.io.LongWritable, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)"><!-- --></A><H3>
224map</H3>
225<PRE>
226public void <B>map</B>(<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&nbsp;offset,
227                <A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&nbsp;size,
228                <A HREF="../../../../org/apache/hadoop/mapred/OutputCollector.html" title="interface in org.apache.hadoop.mapred">OutputCollector</A>&lt;<A HREF="../../../../org/apache/hadoop/io/BooleanWritable.html" title="class in org.apache.hadoop.io">BooleanWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&gt;&nbsp;out,
229                <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)
230         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>
231<DL>
232<DD>Map method.
233<P>
234<DD><DL>
235<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/Mapper.html#map(K1, V1, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)">map</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred">Mapper</A>&lt;<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>,<A HREF="../../../../org/apache/hadoop/io/BooleanWritable.html" title="class in org.apache.hadoop.io">BooleanWritable</A>,<A HREF="../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>&gt;</CODE></DL>
236</DD>
237<DD><DL>
238<DT><B>Parameters:</B><DD><CODE>offset</CODE> - samples starting from the (offset+1)th sample.<DD><CODE>size</CODE> - the number of samples for this map<DD><CODE>out</CODE> - output {ture->numInside, false->numOutside}<DD><CODE>reporter</CODE> -
239<DT><B>Throws:</B>
240<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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