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7MultiFileWordCount.MultiFileLineRecordReader (Hadoop 0.20.1 API)
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91org.apache.hadoop.examples</FONT>
92<BR>
93Class MultiFileWordCount.MultiFileLineRecordReader</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.examples.MultiFileWordCount.MultiFileLineRecordReader</B>
97</PRE>
98<DL>
99<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</DD>
100</DL>
101<DL>
102<DT><B>Enclosing class:</B><DD><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.html" title="class in org.apache.hadoop.examples">MultiFileWordCount</A></DD>
103</DL>
104<HR>
105<DL>
106<DT><PRE>public static class <B>MultiFileWordCount.MultiFileLineRecordReader</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/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</DL>
107</PRE>
108
109<P>
110RecordReader is responsible from extracting records from the InputSplit.
111 This record reader accepts a <A HREF="../../../../org/apache/hadoop/mapred/MultiFileSplit.html" title="class in org.apache.hadoop.mapred"><CODE>MultiFileSplit</CODE></A>, which encapsulates several
112 files, and no file is divided.
113<P>
114
115<P>
116<HR>
117
118<P>
119
120<!-- ======== CONSTRUCTOR SUMMARY ======== -->
121
122<A NAME="constructor_summary"><!-- --></A>
123<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
124<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
125<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
126<B>Constructor Summary</B></FONT></TH>
127</TR>
128<TR BGCOLOR="white" CLASS="TableRowColor">
129<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#MultiFileWordCount.MultiFileLineRecordReader(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapred.MultiFileSplit)">MultiFileWordCount.MultiFileLineRecordReader</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
130                                             <A HREF="../../../../org/apache/hadoop/mapred/MultiFileSplit.html" title="class in org.apache.hadoop.mapred">MultiFileSplit</A>&nbsp;split)</CODE>
131
132<BR>
133&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
134</TR>
135</TABLE>
136&nbsp;
137<!-- ========== METHOD SUMMARY =========== -->
138
139<A NAME="method_summary"><!-- --></A>
140<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
141<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
142<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
143<B>Method Summary</B></FONT></TH>
144</TR>
145<TR BGCOLOR="white" CLASS="TableRowColor">
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/MultiFileWordCount.MultiFileLineRecordReader.html#close()">close</A></B>()</CODE>
149
150<BR>
151&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close this <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><CODE>InputSplit</CODE></A> to future operations.</TD>
152</TR>
153<TR BGCOLOR="white" CLASS="TableRowColor">
154<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
155<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A></CODE></FONT></TD>
156<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#createKey()">createKey</A></B>()</CODE>
157
158<BR>
159&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create an object of the appropriate type to be used as a key.</TD>
160</TR>
161<TR BGCOLOR="white" CLASS="TableRowColor">
162<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
163<CODE>&nbsp;<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A></CODE></FONT></TD>
164<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#createValue()">createValue</A></B>()</CODE>
165
166<BR>
167&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create an object of the appropriate type to be used as a value.</TD>
168</TR>
169<TR BGCOLOR="white" CLASS="TableRowColor">
170<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
171<CODE>&nbsp;long</CODE></FONT></TD>
172<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#getPos()">getPos</A></B>()</CODE>
173
174<BR>
175&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the current position in the input.</TD>
176</TR>
177<TR BGCOLOR="white" CLASS="TableRowColor">
178<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
179<CODE>&nbsp;float</CODE></FONT></TD>
180<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#getProgress()">getProgress</A></B>()</CODE>
181
182<BR>
183&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;How much of the input has the <A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><CODE>RecordReader</CODE></A> consumed i.e.</TD>
184</TR>
185<TR BGCOLOR="white" CLASS="TableRowColor">
186<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
187<CODE>&nbsp;boolean</CODE></FONT></TD>
188<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html#next(org.apache.hadoop.examples.MultiFileWordCount.WordOffset, org.apache.hadoop.io.Text)">next</A></B>(<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>&nbsp;key,
189     <A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&nbsp;value)</CODE>
190
191<BR>
192&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reads the next key/value pair from the input for processing.</TD>
193</TR>
194</TABLE>
195&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
196<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
197<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
198<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>
199</TR>
200<TR BGCOLOR="white" CLASS="TableRowColor">
201<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>
202</TR>
203</TABLE>
204&nbsp;
205<P>
206
207<!-- ========= CONSTRUCTOR DETAIL ======== -->
208
209<A NAME="constructor_detail"><!-- --></A>
210<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
211<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
212<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
213<B>Constructor Detail</B></FONT></TH>
214</TR>
215</TABLE>
216
217<A NAME="MultiFileWordCount.MultiFileLineRecordReader(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapred.MultiFileSplit)"><!-- --></A><H3>
218MultiFileWordCount.MultiFileLineRecordReader</H3>
219<PRE>
220public <B>MultiFileWordCount.MultiFileLineRecordReader</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
221                                                    <A HREF="../../../../org/apache/hadoop/mapred/MultiFileSplit.html" title="class in org.apache.hadoop.mapred">MultiFileSplit</A>&nbsp;split)
222                                             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>
223<DL>
224<DL>
225
226<DT><B>Throws:</B>
227<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>
228</DL>
229
230<!-- ============ METHOD DETAIL ========== -->
231
232<A NAME="method_detail"><!-- --></A>
233<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
234<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
235<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
236<B>Method Detail</B></FONT></TH>
237</TR>
238</TABLE>
239
240<A NAME="close()"><!-- --></A><H3>
241close</H3>
242<PRE>
243public void <B>close</B>()
244           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>
245<DL>
246<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#close()">RecordReader</A></CODE></B></DD>
247<DD>Close this <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><CODE>InputSplit</CODE></A> to future operations.
248<P>
249<DD><DL>
250<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#close()">close</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
251</DD>
252<DD><DL>
253
254<DT><B>Throws:</B>
255<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>
256</DD>
257</DL>
258<HR>
259
260<A NAME="getPos()"><!-- --></A><H3>
261getPos</H3>
262<PRE>
263public long <B>getPos</B>()
264            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>
265<DL>
266<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#getPos()">RecordReader</A></CODE></B></DD>
267<DD>Returns the current position in the input.
268<P>
269<DD><DL>
270<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#getPos()">getPos</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
271</DD>
272<DD><DL>
273
274<DT><B>Returns:</B><DD>the current position in the input.
275<DT><B>Throws:</B>
276<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>
277</DD>
278</DL>
279<HR>
280
281<A NAME="getProgress()"><!-- --></A><H3>
282getProgress</H3>
283<PRE>
284public float <B>getProgress</B>()
285                  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>
286<DL>
287<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#getProgress()">RecordReader</A></CODE></B></DD>
288<DD>How much of the input has the <A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><CODE>RecordReader</CODE></A> consumed i.e.
289 has been processed by?
290<P>
291<DD><DL>
292<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#getProgress()">getProgress</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
293</DD>
294<DD><DL>
295
296<DT><B>Returns:</B><DD>progress from <code>0.0</code> to <code>1.0</code>.
297<DT><B>Throws:</B>
298<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>
299</DD>
300</DL>
301<HR>
302
303<A NAME="next(org.apache.hadoop.examples.MultiFileWordCount.WordOffset, org.apache.hadoop.io.Text)"><!-- --></A><H3>
304next</H3>
305<PRE>
306public boolean <B>next</B>(<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>&nbsp;key,
307                    <A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&nbsp;value)
308             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>
309<DL>
310<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#next(K, V)">RecordReader</A></CODE></B></DD>
311<DD>Reads the next key/value pair from the input for processing.
312<P>
313<DD><DL>
314<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#next(K, V)">next</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
315</DD>
316<DD><DL>
317<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key to read data into<DD><CODE>value</CODE> - the value to read data into
318<DT><B>Returns:</B><DD>true iff a key/value was read, false if at EOF
319<DT><B>Throws:</B>
320<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>
321</DD>
322</DL>
323<HR>
324
325<A NAME="createKey()"><!-- --></A><H3>
326createKey</H3>
327<PRE>
328public <A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A> <B>createKey</B>()</PRE>
329<DL>
330<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#createKey()">RecordReader</A></CODE></B></DD>
331<DD>Create an object of the appropriate type to be used as a key.
332<P>
333<DD><DL>
334<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#createKey()">createKey</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
335</DD>
336<DD><DL>
337
338<DT><B>Returns:</B><DD>a new key object.</DL>
339</DD>
340</DL>
341<HR>
342
343<A NAME="createValue()"><!-- --></A><H3>
344createValue</H3>
345<PRE>
346public <A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A> <B>createValue</B>()</PRE>
347<DL>
348<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#createValue()">RecordReader</A></CODE></B></DD>
349<DD>Create an object of the appropriate type to be used as a value.
350<P>
351<DD><DL>
352<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html#createValue()">createValue</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</A>&lt;<A HREF="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</A>,<A HREF="../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>&gt;</CODE></DL>
353</DD>
354<DD><DL>
355
356<DT><B>Returns:</B><DD>a new value object.</DL>
357</DD>
358</DL>
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