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7SequenceFileInputFilter (Hadoop 0.20.1 API)
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79  SUMMARY:&nbsp;<A HREF="#nested_class_summary">NESTED</A>&nbsp;|&nbsp;<A HREF="#fields_inherited_from_class_org.apache.hadoop.mapred.FileInputFormat">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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91org.apache.hadoop.mapred</FONT>
92<BR>
93Class SequenceFileInputFilter&lt;K,V&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/mapred/FileInputFormat.html" title="class in org.apache.hadoop.mapred">org.apache.hadoop.mapred.FileInputFormat</A>&lt;K,V&gt;
97      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html" title="class in org.apache.hadoop.mapred">org.apache.hadoop.mapred.SequenceFileInputFormat</A>&lt;K,V&gt;
98          <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapred.SequenceFileInputFilter&lt;K,V&gt;</B>
99</PRE>
100<DL>
101<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</A>&lt;K,V&gt;</DD>
102</DL>
103<HR>
104<DL>
105<DT><PRE>public class <B>SequenceFileInputFilter&lt;K,V&gt;</B><DT>extends <A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFormat</A>&lt;K,V&gt;</DL>
106</PRE>
107
108<P>
109A class that allows a map/red job to work on a sample of sequence files.
110 The sample is decided by the filter class set by the job.
111<P>
112
113<P>
114<HR>
115
116<P>
117<!-- ======== NESTED CLASS SUMMARY ======== -->
118
119<A NAME="nested_class_summary"><!-- --></A>
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122<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
123<B>Nested Class Summary</B></FONT></TH>
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125<TR BGCOLOR="white" CLASS="TableRowColor">
126<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
127<CODE>static&nbsp;interface</CODE></FONT></TD>
128<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.Filter.html" title="interface in org.apache.hadoop.mapred">SequenceFileInputFilter.Filter</A></B></CODE>
129
130<BR>
131&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;filter interface</TD>
132</TR>
133<TR BGCOLOR="white" CLASS="TableRowColor">
134<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
135<CODE>static&nbsp;class</CODE></FONT></TD>
136<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.FilterBase.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFilter.FilterBase</A></B></CODE>
137
138<BR>
139&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;base class for Filters</TD>
140</TR>
141<TR BGCOLOR="white" CLASS="TableRowColor">
142<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
143<CODE>static&nbsp;class</CODE></FONT></TD>
144<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.MD5Filter.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFilter.MD5Filter</A></B></CODE>
145
146<BR>
147&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This class returns a set of records by examing the MD5 digest of its
148 key against a filtering frequency <i>f</i>.</TD>
149</TR>
150<TR BGCOLOR="white" CLASS="TableRowColor">
151<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
152<CODE>static&nbsp;class</CODE></FONT></TD>
153<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.PercentFilter.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFilter.PercentFilter</A></B></CODE>
154
155<BR>
156&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This class returns a percentage of records
157 The percentage is determined by a filtering frequency <i>f</i> using
158 the criteria record# % f == 0.</TD>
159</TR>
160<TR BGCOLOR="white" CLASS="TableRowColor">
161<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
162<CODE>static&nbsp;class</CODE></FONT></TD>
163<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.RegexFilter.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFilter.RegexFilter</A></B></CODE>
164
165<BR>
166&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Records filter by matching key to regex</TD>
167</TR>
168</TABLE>
169&nbsp;<!-- =========== FIELD SUMMARY =========== -->
170
171<A NAME="field_summary"><!-- --></A>
172<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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174<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
175<B>Field Summary</B></FONT></TH>
176</TR>
177</TABLE>
178&nbsp;<A NAME="fields_inherited_from_class_org.apache.hadoop.mapred.FileInputFormat"><!-- --></A>
179<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
180<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
181<TH ALIGN="left"><B>Fields inherited from class org.apache.hadoop.mapred.<A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="class in org.apache.hadoop.mapred">FileInputFormat</A></B></TH>
182</TR>
183<TR BGCOLOR="white" CLASS="TableRowColor">
184<TD><CODE><A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#LOG">LOG</A></CODE></TD>
185</TR>
186</TABLE>
187&nbsp;
188<!-- ======== CONSTRUCTOR SUMMARY ======== -->
189
190<A NAME="constructor_summary"><!-- --></A>
191<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
192<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
193<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
194<B>Constructor Summary</B></FONT></TH>
195</TR>
196<TR BGCOLOR="white" CLASS="TableRowColor">
197<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html#SequenceFileInputFilter()">SequenceFileInputFilter</A></B>()</CODE>
198
199<BR>
200&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
201</TR>
202</TABLE>
203&nbsp;
204<!-- ========== METHOD SUMMARY =========== -->
205
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210<B>Method Summary</B></FONT></TH>
211</TR>
212<TR BGCOLOR="white" CLASS="TableRowColor">
213<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
214<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">K</A>,<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">V</A>&gt;</CODE></FONT></TD>
215<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.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,
216                <A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A>&nbsp;job,
217                <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)</CODE>
218
219<BR>
220&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create a record reader for the given split</TD>
221</TR>
222<TR BGCOLOR="white" CLASS="TableRowColor">
223<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
224<CODE>static&nbsp;void</CODE></FONT></TD>
225<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html#setFilterClass(org.apache.hadoop.conf.Configuration, java.lang.Class)">setFilterClass</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
226               <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>&nbsp;filterClass)</CODE>
227
228<BR>
229&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;set the filter class</TD>
230</TR>
231</TABLE>
232&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapred.SequenceFileInputFormat"><!-- --></A>
233<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
234<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
235<TH ALIGN="left"><B>Methods inherited from class org.apache.hadoop.mapred.<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFormat</A></B></TH>
236</TR>
237<TR BGCOLOR="white" CLASS="TableRowColor">
238<TD><CODE><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html#listStatus(org.apache.hadoop.mapred.JobConf)">listStatus</A></CODE></TD>
239</TR>
240</TABLE>
241&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.mapred.FileInputFormat"><!-- --></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 org.apache.hadoop.mapred.<A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="class in org.apache.hadoop.mapred">FileInputFormat</A></B></TH>
245</TR>
246<TR BGCOLOR="white" CLASS="TableRowColor">
247<TD><CODE><A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#addInputPath(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.fs.Path)">addInputPath</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#addInputPaths(org.apache.hadoop.mapred.JobConf, java.lang.String)">addInputPaths</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#computeSplitSize(long, long, long)">computeSplitSize</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getBlockIndex(org.apache.hadoop.fs.BlockLocation[], long)">getBlockIndex</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getInputPathFilter(org.apache.hadoop.mapred.JobConf)">getInputPathFilter</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getInputPaths(org.apache.hadoop.mapred.JobConf)">getInputPaths</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getSplitHosts(org.apache.hadoop.fs.BlockLocation[], long, long, org.apache.hadoop.net.NetworkTopology)">getSplitHosts</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getSplits(org.apache.hadoop.mapred.JobConf, int)">getSplits</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#isSplitable(org.apache.hadoop.fs.FileSystem, org.apache.hadoop.fs.Path)">isSplitable</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPathFilter(org.apache.hadoop.mapred.JobConf, java.lang.Class)">setInputPathFilter</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPaths(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.fs.Path...)">setInputPaths</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPaths(org.apache.hadoop.mapred.JobConf, java.lang.String)">setInputPaths</A>, <A HREF="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setMinSplitSize(long)">setMinSplitSize</A></CODE></TD>
248</TR>
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253<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>
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257</TR>
258</TABLE>
259&nbsp;
260<P>
261
262<!-- ========= CONSTRUCTOR DETAIL ======== -->
263
264<A NAME="constructor_detail"><!-- --></A>
265<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
266<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
267<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
268<B>Constructor Detail</B></FONT></TH>
269</TR>
270</TABLE>
271
272<A NAME="SequenceFileInputFilter()"><!-- --></A><H3>
273SequenceFileInputFilter</H3>
274<PRE>
275public <B>SequenceFileInputFilter</B>()</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="getRecordReader(org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.Reporter)"><!-- --></A><H3>
290getRecordReader</H3>
291<PRE>
292public <A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">K</A>,<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">V</A>&gt; <B>getRecordReader</B>(<A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</A>&nbsp;split,
293                                         <A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A>&nbsp;job,
294                                         <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A>&nbsp;reporter)
295                                  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>
296<DL>
297<DD>Create a record reader for the given split
298<P>
299<DD><DL>
300<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/InputFormat.html#getRecordReader(org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.Reporter)">getRecordReader</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</A>&lt;<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">K</A>,<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">V</A>&gt;</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html#getRecordReader(org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.Reporter)">getRecordReader</A></CODE> in class <CODE><A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFormat</A>&lt;<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">K</A>,<A HREF="../../../../org/apache/hadoop/mapred/SequenceFileInputFilter.html" title="type parameter in SequenceFileInputFilter">V</A>&gt;</CODE></DL>
301</DD>
302<DD><DL>
303<DT><B>Parameters:</B><DD><CODE>split</CODE> - file split<DD><CODE>job</CODE> - job configuration<DD><CODE>reporter</CODE> - reporter who sends report to task tracker
304<DT><B>Returns:</B><DD>RecordReader
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></DL>
307</DD>
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310
311<A NAME="setFilterClass(org.apache.hadoop.conf.Configuration, java.lang.Class)"><!-- --></A><H3>
312setFilterClass</H3>
313<PRE>
314public static void <B>setFilterClass</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
315                                  <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>&nbsp;filterClass)</PRE>
316<DL>
317<DD>set the filter class
318<P>
319<DD><DL>
320<DT><B>Parameters:</B><DD><CODE>conf</CODE> - application configuration<DD><CODE>filterClass</CODE> - filter class</DL>
321</DD>
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