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MultiFilterRecordReader.MultiFilterDelegationIterator (Hadoop 0.20.205.0 API)
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org.apache.hadoop.mapred.join</FONT>
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Class MultiFilterRecordReader.MultiFilterDelegationIterator</H2>
<PRE>
<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>
  <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapred.join.MultiFilterRecordReader.MultiFilterDelegationIterator</B>
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<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;V&gt;</DD>
</DL>
<DL>
<DT><B>Enclosing class:</B><DD><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="class in org.apache.hadoop.mapred.join">MultiFilterRecordReader</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">K</A> extends <A HREF="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</A>,<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</DD>
</DL>
<HR>
<DL>
<DT><PRE>protected class <B>MultiFilterRecordReader.MultiFilterDelegationIterator</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/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;V&gt;</DL>
</PRE>

<P>
Proxy the JoinCollector, but include callback to emit.
<P>

<P>
<HR>

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<!-- ======== NESTED CLASS SUMMARY ======== -->

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<TH ALIGN="left"><B>Nested classes/interfaces inherited from interface org.apache.hadoop.mapred.join.<A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.EMPTY.html" title="class in org.apache.hadoop.mapred.join">ResetableIterator.EMPTY</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.EMPTY.html" title="type parameter in ResetableIterator.EMPTY">U</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></TD>
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<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#MultiFilterRecordReader.MultiFilterDelegationIterator()">MultiFilterRecordReader.MultiFilterDelegationIterator</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#add(V)">add</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;item)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add an element to the collection of elements to iterate over.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#clear()">clear</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close datasources, but do not release internal resources.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#close()">close</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close datasources and release resources.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#hasNext()">hasNext</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;True if a call to next may return a value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#next(V)">next</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;val)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Assign next value to actual.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#replay(V)">replay</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;val)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Assign last value returned to actual.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.MultiFilterDelegationIterator.html#reset()">reset</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set iterator to return to the start of its range.</TD>
</TR>
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<P>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<B>Constructor Detail</B></FONT></TH>
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</TABLE>

<A NAME="MultiFilterRecordReader.MultiFilterDelegationIterator()"><!-- --></A><H3>
MultiFilterRecordReader.MultiFilterDelegationIterator</H3>
<PRE>
protected <B>MultiFilterRecordReader.MultiFilterDelegationIterator</B>()</PRE>
<DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Method Detail</B></FONT></TH>
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<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
public boolean <B>hasNext</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#hasNext()">ResetableIterator</A></CODE></B></DD>
<DD>True if a call to next may return a value. This is permitted false
 positives, but not false negatives.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#hasNext()">hasNext</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="next(org.apache.hadoop.io.Writable)"><!-- --></A><A NAME="next(V)"><!-- --></A><H3>
next</H3>
<PRE>
public boolean <B>next</B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;val)
             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>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#next(T)">ResetableIterator</A></CODE></B></DD>
<DD>Assign next value to actual.
 It is required that elements added to a ResetableIterator be returned in
 the same order after a call to <A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#reset()"><CODE>ResetableIterator.reset()</CODE></A> (FIFO).

 Note that a call to this may fail for nested joins (i.e. more elements
 available, but none satisfying the constraints of the join)
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#next(T)">next</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<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>
</DD>
</DL>
<HR>

<A NAME="replay(org.apache.hadoop.io.Writable)"><!-- --></A><A NAME="replay(V)"><!-- --></A><H3>
replay</H3>
<PRE>
public boolean <B>replay</B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;val)
               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>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#replay(T)">ResetableIterator</A></CODE></B></DD>
<DD>Assign last value returned to actual.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#replay(T)">replay</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<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>
</DD>
</DL>
<HR>

<A NAME="reset()"><!-- --></A><H3>
reset</H3>
<PRE>
public void <B>reset</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#reset()">ResetableIterator</A></CODE></B></DD>
<DD>Set iterator to return to the start of its range. Must be called after
 calling <A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#add(T)"><CODE>ResetableIterator.add(T)</CODE></A> to avoid a ConcurrentModificationException.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#reset()">reset</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="add(org.apache.hadoop.io.Writable)"><!-- --></A><A NAME="add(V)"><!-- --></A><H3>
add</H3>
<PRE>
public void <B>add</B>(<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A>&nbsp;item)
         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>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#add(T)">ResetableIterator</A></CODE></B></DD>
<DD>Add an element to the collection of elements to iterate over.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#add(T)">add</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<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>
</DD>
</DL>
<HR>

<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()
           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>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#close()">ResetableIterator</A></CODE></B></DD>
<DD>Close datasources and release resources. Calling methods on the iterator
 after calling close has undefined behavior.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#close()">close</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html" title="interface in org.apache.hadoop.mapred.join">ResetableIterator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="type parameter in MultiFilterRecordReader">V</A> extends <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>&gt;</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<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>
</DD>
</DL>
<HR>

<A NAME="clear()"><!-- --></A><H3>
clear</H3>
<PRE>
public void <B>clear</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/join/ResetableIterator.html#clear()">ResetableIterator</A></CODE></B></DD>
<DD>Close datasources, but do not release internal resources. Calling this
 method should permit the object to be reused with a different datasource.
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