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1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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5<!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:56:58 UTC 2009 -->
6<TITLE>
7CounterGroup (Hadoop 0.20.1 API)
8</TITLE>
9
10<META NAME="date" CONTENT="2009-09-01">
11
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18        parent.document.title="CounterGroup (Hadoop 0.20.1 API)";
19    }
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37<A NAME="navbar_top_firstrow"><!-- --></A>
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39  <TR ALIGN="center" VALIGN="top">
40  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
41  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A>&nbsp;</TD>
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43  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="class-use/CounterGroup.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
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55
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58&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce"><B>PREV CLASS</B></A>&nbsp;
59&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/Counters.html" title="class in org.apache.hadoop.mapreduce"><B>NEXT CLASS</B></A></FONT></TD>
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61  <A HREF="../../../../index.html?org/apache/hadoop/mapreduce/CounterGroup.html" target="_top"><B>FRAMES</B></A>  &nbsp;
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79  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
80<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
81DETAIL:&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_detail">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
82</TR>
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85<!-- ========= END OF TOP NAVBAR ========= -->
86
87<HR>
88<!-- ======== START OF CLASS DATA ======== -->
89<H2>
90<FONT SIZE="-1">
91org.apache.hadoop.mapreduce</FONT>
92<BR>
93Class CounterGroup</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 "><B>org.apache.hadoop.mapreduce.CounterGroup</B>
97</PRE>
98<DL>
99<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&gt;, <A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A></DD>
100</DL>
101<HR>
102<DL>
103<DT><PRE>public class <B>CounterGroup</B><DT>extends <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><DT>implements <A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&gt;</DL>
104</PRE>
105
106<P>
107A group of <A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce"><CODE>Counter</CODE></A>s that logically belong together. Typically,
108 it is an <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><CODE>Enum</CODE></A> subclass and the counters are the values.
109<P>
110
111<P>
112<HR>
113
114<P>
115
116<!-- ======== CONSTRUCTOR SUMMARY ======== -->
117
118<A NAME="constructor_summary"><!-- --></A>
119<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
120<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
121<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
122<B>Constructor Summary</B></FONT></TH>
123</TR>
124<TR BGCOLOR="white" CLASS="TableRowColor">
125<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
126<CODE>protected </CODE></FONT></TD>
127<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#CounterGroup(java.lang.String)">CounterGroup</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;name)</CODE>
128
129<BR>
130&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
131</TR>
132<TR BGCOLOR="white" CLASS="TableRowColor">
133<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
134<CODE>protected </CODE></FONT></TD>
135<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#CounterGroup(java.lang.String, java.lang.String)">CounterGroup</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;name,
136             <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;displayName)</CODE>
137
138<BR>
139&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
140</TR>
141</TABLE>
142&nbsp;
143<!-- ========== METHOD SUMMARY =========== -->
144
145<A NAME="method_summary"><!-- --></A>
146<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
147<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
148<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
149<B>Method Summary</B></FONT></TH>
150</TR>
151<TR BGCOLOR="white" CLASS="TableRowColor">
152<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
153<CODE>&nbsp;boolean</CODE></FONT></TD>
154<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#equals(java.lang.Object)">equals</A></B>(<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>&nbsp;genericRight)</CODE>
155
156<BR>
157&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
158</TR>
159<TR BGCOLOR="white" CLASS="TableRowColor">
160<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
161<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A></CODE></FONT></TD>
162<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#findCounter(java.lang.String)">findCounter</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;counterName)</CODE>
163
164<BR>
165&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
166</TR>
167<TR BGCOLOR="white" CLASS="TableRowColor">
168<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
169<CODE>protected &nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A></CODE></FONT></TD>
170<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#findCounter(java.lang.String, java.lang.String)">findCounter</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;counterName,
171            <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;displayName)</CODE>
172
173<BR>
174&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Internal to find a counter in a group.</TD>
175</TR>
176<TR BGCOLOR="white" CLASS="TableRowColor">
177<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
178<CODE>&nbsp;<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></CODE></FONT></TD>
179<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#getDisplayName()">getDisplayName</A></B>()</CODE>
180
181<BR>
182&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the display name of the group.</TD>
183</TR>
184<TR BGCOLOR="white" CLASS="TableRowColor">
185<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
186<CODE>&nbsp;<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></CODE></FONT></TD>
187<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#getName()">getName</A></B>()</CODE>
188
189<BR>
190&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the internal name of the group</TD>
191</TR>
192<TR BGCOLOR="white" CLASS="TableRowColor">
193<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
194<CODE>&nbsp;int</CODE></FONT></TD>
195<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#hashCode()">hashCode</A></B>()</CODE>
196
197<BR>
198&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
199</TR>
200<TR BGCOLOR="white" CLASS="TableRowColor">
201<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
202<CODE>&nbsp;void</CODE></FONT></TD>
203<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#incrAllCounters(org.apache.hadoop.mapreduce.CounterGroup)">incrAllCounters</A></B>(<A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html" title="class in org.apache.hadoop.mapreduce">CounterGroup</A>&nbsp;rightGroup)</CODE>
204
205<BR>
206&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
207</TR>
208<TR BGCOLOR="white" CLASS="TableRowColor">
209<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
210<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&gt;</CODE></FONT></TD>
211<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#iterator()">iterator</A></B>()</CODE>
212
213<BR>
214&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
215</TR>
216<TR BGCOLOR="white" CLASS="TableRowColor">
217<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
218<CODE>&nbsp;void</CODE></FONT></TD>
219<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#readFields(java.io.DataInput)">readFields</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</A>&nbsp;in)</CODE>
220
221<BR>
222&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deserialize the fields of this object from <code>in</code>.</TD>
223</TR>
224<TR BGCOLOR="white" CLASS="TableRowColor">
225<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
226<CODE>&nbsp;int</CODE></FONT></TD>
227<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#size()">size</A></B>()</CODE>
228
229<BR>
230&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the number of counters in this group.</TD>
231</TR>
232<TR BGCOLOR="white" CLASS="TableRowColor">
233<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
234<CODE>&nbsp;void</CODE></FONT></TD>
235<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html#write(java.io.DataOutput)">write</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</A>&nbsp;out)</CODE>
236
237<BR>
238&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Serialize the fields of this object to <code>out</code>.</TD>
239</TR>
240</TABLE>
241&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
242<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
243<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
244<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>
245</TR>
246<TR BGCOLOR="white" CLASS="TableRowColor">
247<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#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#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>
248</TR>
249</TABLE>
250&nbsp;
251<P>
252
253<!-- ========= CONSTRUCTOR DETAIL ======== -->
254
255<A NAME="constructor_detail"><!-- --></A>
256<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
257<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
258<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
259<B>Constructor Detail</B></FONT></TH>
260</TR>
261</TABLE>
262
263<A NAME="CounterGroup(java.lang.String)"><!-- --></A><H3>
264CounterGroup</H3>
265<PRE>
266protected <B>CounterGroup</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;name)</PRE>
267<DL>
268</DL>
269<HR>
270
271<A NAME="CounterGroup(java.lang.String, java.lang.String)"><!-- --></A><H3>
272CounterGroup</H3>
273<PRE>
274protected <B>CounterGroup</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;name,
275                       <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;displayName)</PRE>
276<DL>
277</DL>
278
279<!-- ============ METHOD DETAIL ========== -->
280
281<A NAME="method_detail"><!-- --></A>
282<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
283<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
284<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
285<B>Method Detail</B></FONT></TH>
286</TR>
287</TABLE>
288
289<A NAME="getName()"><!-- --></A><H3>
290getName</H3>
291<PRE>
292public <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> <B>getName</B>()</PRE>
293<DL>
294<DD>Get the internal name of the group
295<P>
296<DD><DL>
297</DL>
298</DD>
299<DD><DL>
300
301<DT><B>Returns:</B><DD>the internal name</DL>
302</DD>
303</DL>
304<HR>
305
306<A NAME="getDisplayName()"><!-- --></A><H3>
307getDisplayName</H3>
308<PRE>
309public <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> <B>getDisplayName</B>()</PRE>
310<DL>
311<DD>Get the display name of the group.
312<P>
313<DD><DL>
314</DL>
315</DD>
316<DD><DL>
317
318<DT><B>Returns:</B><DD>the human readable name</DL>
319</DD>
320</DL>
321<HR>
322
323<A NAME="findCounter(java.lang.String, java.lang.String)"><!-- --></A><H3>
324findCounter</H3>
325<PRE>
326protected <A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A> <B>findCounter</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;counterName,
327                              <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;displayName)</PRE>
328<DL>
329<DD>Internal to find a counter in a group.
330<P>
331<DD><DL>
332</DL>
333</DD>
334<DD><DL>
335<DT><B>Parameters:</B><DD><CODE>counterName</CODE> - the name of the counter<DD><CODE>displayName</CODE> - the display name of the counter
336<DT><B>Returns:</B><DD>the counter that was found or added</DL>
337</DD>
338</DL>
339<HR>
340
341<A NAME="findCounter(java.lang.String)"><!-- --></A><H3>
342findCounter</H3>
343<PRE>
344public <A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A> <B>findCounter</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;counterName)</PRE>
345<DL>
346<DD><DL>
347</DL>
348</DD>
349<DD><DL>
350</DL>
351</DD>
352</DL>
353<HR>
354
355<A NAME="iterator()"><!-- --></A><H3>
356iterator</H3>
357<PRE>
358public <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&gt; <B>iterator</B>()</PRE>
359<DL>
360<DD><DL>
361<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true#iterator()" title="class or interface in java.lang">iterator</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</A>&lt;<A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&gt;</CODE></DL>
362</DD>
363<DD><DL>
364</DL>
365</DD>
366</DL>
367<HR>
368
369<A NAME="write(java.io.DataOutput)"><!-- --></A><H3>
370write</H3>
371<PRE>
372public void <B>write</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</A>&nbsp;out)
373           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>
374<DL>
375<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#write(java.io.DataOutput)">Writable</A></CODE></B></DD>
376<DD>Serialize the fields of this object to <code>out</code>.
377<P>
378<DD><DL>
379<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#write(java.io.DataOutput)">write</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A></CODE></DL>
380</DD>
381<DD><DL>
382<DT><B>Parameters:</B><DD><CODE>out</CODE> - <code>DataOuput</code> to serialize this object into.
383<DT><B>Throws:</B>
384<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>
385</DD>
386</DL>
387<HR>
388
389<A NAME="readFields(java.io.DataInput)"><!-- --></A><H3>
390readFields</H3>
391<PRE>
392public void <B>readFields</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</A>&nbsp;in)
393                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>
394<DL>
395<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#readFields(java.io.DataInput)">Writable</A></CODE></B></DD>
396<DD>Deserialize the fields of this object from <code>in</code>. 
397 
398 <p>For efficiency, implementations should attempt to re-use storage in the
399 existing object where possible.</p>
400<P>
401<DD><DL>
402<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#readFields(java.io.DataInput)">readFields</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A></CODE></DL>
403</DD>
404<DD><DL>
405<DT><B>Parameters:</B><DD><CODE>in</CODE> - <code>DataInput</code> to deseriablize this object from.
406<DT><B>Throws:</B>
407<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>
408</DD>
409</DL>
410<HR>
411
412<A NAME="size()"><!-- --></A><H3>
413size</H3>
414<PRE>
415public int <B>size</B>()</PRE>
416<DL>
417<DD>Returns the number of counters in this group.
418<P>
419<DD><DL>
420</DL>
421</DD>
422<DD><DL>
423</DL>
424</DD>
425</DL>
426<HR>
427
428<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
429equals</H3>
430<PRE>
431public boolean <B>equals</B>(<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>&nbsp;genericRight)</PRE>
432<DL>
433<DD><DL>
434<DT><B>Overrides:</B><DD><CODE><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></CODE> in class <CODE><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></CODE></DL>
435</DD>
436<DD><DL>
437</DL>
438</DD>
439</DL>
440<HR>
441
442<A NAME="hashCode()"><!-- --></A><H3>
443hashCode</H3>
444<PRE>
445public int <B>hashCode</B>()</PRE>
446<DL>
447<DD><DL>
448<DT><B>Overrides:</B><DD><CODE><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></CODE> in class <CODE><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></CODE></DL>
449</DD>
450<DD><DL>
451</DL>
452</DD>
453</DL>
454<HR>
455
456<A NAME="incrAllCounters(org.apache.hadoop.mapreduce.CounterGroup)"><!-- --></A><H3>
457incrAllCounters</H3>
458<PRE>
459public void <B>incrAllCounters</B>(<A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html" title="class in org.apache.hadoop.mapreduce">CounterGroup</A>&nbsp;rightGroup)</PRE>
460<DL>
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