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10org.apache.hadoop.mapred.join.CompositeRecordReader
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48<H2>
49Class org.apache.hadoop.mapred.join.<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html" target="_top"><tt>CompositeRecordReader</tt></A>
50</H2>
51<a NAME="constructors"></a>
52<p>
53<a NAME="Changed"></a>
54<TABLE summary="Changed Constructors" BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
55<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
56  <TD VALIGN="TOP" COLSPAN=3><FONT SIZE="+1"><B>Changed Constructors</B></FONT></TD>
57</TR>
58<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
59  <TD VALIGN="TOP" WIDTH="25%">
60  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.ctor_changed(int, int, java.lang.Class)"></A>
61  <nobr><A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#CompositeRecordReader(int, int, java.lang.Class)" target="_top"><tt>CompositeRecordReader</tt></A>(<code>int,</nobr> int<nobr>,</nobr> Class<nobr><nobr></code>)  </nobr>
62  </TD>
63  <TD VALIGN="TOP" WIDTH="30%">
64Change in type from (<code>int, int, Class<?, extends, WritableComparator></code>) to (<code>int, int, Class</code>).<br>
65  </TD>
66  <TD VALIGN="TOP">Create a RecordReader with <tt>capacity</tt> children to position <tt>id</tt> in the parent reader.</TD>
67</TR>
68</TABLE>
69&nbsp;
70<a NAME="methods"></a>
71<p>
72<a NAME="Changed"></a>
73<TABLE summary="Changed Methods" BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
74<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
75  <TD VALIGN="TOP" COLSPAN=3><FONT SIZE="+1"><B>Changed Methods</B></FONT></TD>
76</TR>
77<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
78  <TD VALIGN="TOP" WIDTH="25%">
79  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.accept_changed(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector, org.apache.hadoop.io.WritableComparable)"></A>
80  <nobr><code>void</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector, org.apache.hadoop.io.WritableComparable)" target="_top"><tt>accept</tt></A>(<code>JoinCollector,</nobr> WritableComparable<nobr><nobr></code>)  </nobr>
81  </TD>
82  <TD VALIGN="TOP" WIDTH="30%">
83Change in signature from (<code>JoinCollector, K, extends, WritableComparable</code>) to (<code>JoinCollector, WritableComparable</code>).<br>
84  </TD>
85  <TD VALIGN="TOP">If key provided matches that of this Composite give JoinCollector iterator over values it may emit.</TD>
86</TR>
87<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
88  <TD VALIGN="TOP" WIDTH="25%">
89  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.add_changed(org.apache.hadoop.mapred.join.ComposableRecordReader)"></A>
90  <nobr><code>void</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#add(org.apache.hadoop.mapred.join.ComposableRecordReader)" target="_top"><tt>add</tt></A>(<code>ComposableRecordReader</code>)  </nobr>
91  </TD>
92  <TD VALIGN="TOP" WIDTH="30%">
93Change in signature from (<code>ComposableRecordReader<K, ?, extends, V></code>) to <code>ComposableRecordReader</code>.<br>
94  </TD>
95  <TD VALIGN="TOP">Add a RecordReader to this collection.</TD>
96</TR>
97<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
98  <TD VALIGN="TOP" WIDTH="25%">
99  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.compareTo_changed(org.apache.hadoop.mapred.join.ComposableRecordReader)"></A>
100  <nobr><code>int</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#compareTo(org.apache.hadoop.mapred.join.ComposableRecordReader)" target="_top"><tt>compareTo</tt></A>(<code>ComposableRecordReader</code>)  </nobr>
101  </TD>
102  <TD VALIGN="TOP" WIDTH="30%">
103Change in signature from (<code>ComposableRecordReader<K, ?></code>) to <code>ComposableRecordReader</code>.<br>
104  </TD>
105  <TD VALIGN="TOP">Implement Comparable contract (compare key of join or head of heap with that of another).</TD>
106</TR>
107<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
108  <TD VALIGN="TOP" WIDTH="25%">
109  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.createKey_changed()"></A>
110  <nobr><code>WritableComparable</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#createKey()" target="_top"><tt>createKey</tt></A>()  </nobr>
111  </TD>
112  <TD VALIGN="TOP" WIDTH="30%">
113Change in return type from (<code>K, extends, WritableComparable</code>) to <code>WritableComparable</code>.<br>
114  </TD>
115  <TD VALIGN="TOP">Create a new key value common to all child RRs.</TD>
116</TR>
117<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
118  <TD VALIGN="TOP" WIDTH="25%">
119  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.fillJoinCollector_changed(org.apache.hadoop.io.WritableComparable)"></A>
120  <nobr><code>void</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#fillJoinCollector(org.apache.hadoop.io.WritableComparable)" target="_top"><tt>fillJoinCollector</tt></A>(<code>WritableComparable</code>)  </nobr>
121  </TD>
122  <TD VALIGN="TOP" WIDTH="30%">
123Change in signature from (<code>K, extends, WritableComparable</code>) to <code>WritableComparable</code>.<br>
124  </TD>
125  <TD VALIGN="TOP">For all child RRs offering the key provided obtain an iterator at that position in the JoinCollector.</TD>
126</TR>
127<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
128  <TD VALIGN="TOP" WIDTH="25%">
129  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.getDelegate_changed()"></A>
130  <nobr><code>ResetableIterator</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#getDelegate()" target="_top"><tt>getDelegate</tt></A>()  </nobr>
131  </TD>
132  <TD VALIGN="TOP" WIDTH="30%">
133Change in return type from <code>ResetableIterator<X></code> to <code>ResetableIterator</code>.<br>
134  </TD>
135  <TD VALIGN="TOP">Obtain an iterator over the child RRs apropos of the value type ultimately emitted from this join.</TD>
136</TR>
137<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
138  <TD VALIGN="TOP" WIDTH="25%">
139  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.getRecordReaderQueue_changed()"></A>
140  <nobr><code>PriorityQueue</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#getRecordReaderQueue()" target="_top"><tt>getRecordReaderQueue</tt></A>()  </nobr>
141  </TD>
142  <TD VALIGN="TOP" WIDTH="30%">
143Change in return type from (<code>ComposableRecordReader<K, ?>></code>) to <code>PriorityQueue</code>.<br>
144  </TD>
145  <TD VALIGN="TOP">Return sorted list of RecordReaders for this composite.</TD>
146</TR>
147<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
148  <TD VALIGN="TOP" WIDTH="25%">
149  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.skip_changed(org.apache.hadoop.io.WritableComparable)"></A>
150  <nobr><code>void</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#skip(org.apache.hadoop.io.WritableComparable)" target="_top"><tt>skip</tt></A>(<code>WritableComparable</code>)  </nobr>
151  </TD>
152  <TD VALIGN="TOP" WIDTH="30%">
153Change in signature from (<code>K, extends, WritableComparable</code>) to <code>WritableComparable</code>.<br>
154  </TD>
155  <TD VALIGN="TOP">Pass skip key to child RRs.</TD>
156</TR>
157<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
158  <TD VALIGN="TOP" WIDTH="25%">
159  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.key_changed()"></A>
160  <nobr><code>WritableComparable</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#key()" target="_top"><tt>key</tt></A>()  </nobr>
161  </TD>
162  <TD VALIGN="TOP" WIDTH="30%">
163Change in return type from (<code>K, extends, WritableComparable</code>) to <code>WritableComparable</code>.<br>
164  </TD>
165  <TD VALIGN="TOP">Return the key for the current join or the value at the top of the RecordReader heap.</TD>
166</TR>
167<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
168  <TD VALIGN="TOP" WIDTH="25%">
169  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.key_changed(org.apache.hadoop.io.WritableComparable)"></A>
170  <nobr><code>void</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#key(org.apache.hadoop.io.WritableComparable)" target="_top"><tt>key</tt></A>(<code>WritableComparable</code>)  </nobr>
171  </TD>
172  <TD VALIGN="TOP" WIDTH="30%">
173Change in signature from (<code>K, extends, WritableComparable</code>) to <code>WritableComparable</code>.<br>
174  </TD>
175  <TD VALIGN="TOP">Clone the key at the top of this RR into the given object.</TD>
176</TR>
177</TABLE>
178&nbsp;
179<a NAME="fields"></a>
180<p>
181<a NAME="Changed"></a>
182<TABLE summary="Changed Fields" BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
183<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
184  <TD VALIGN="TOP" COLSPAN=3><FONT SIZE="+1"><B>Changed Fields</B></FONT></TD>
185</TR>
186<TR BGCOLOR="#FFFFFF" CLASS="TableRowColor">
187  <TD VALIGN="TOP" WIDTH="25%">
188  <A NAME="org.apache.hadoop.mapred.join.CompositeRecordReader.jc"></A>
189  <nobr><code>JoinCollector</code>&nbsp;<A HREF="../../api/org/apache/hadoop/mapred/join/CompositeRecordReader.html#jc" target="_top"><tt>jc</tt></A></nobr>  </TD>
190  <TD VALIGN="TOP" WIDTH="30%">
191Change in type from (<code>CompositeRecordReader<K, V, JoinCollector</code>) to <code>JoinCollector</code>.<br>
192  </TD>
193  <TD>&nbsp;</TD>
194</TR>
195</TABLE>
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