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<h2 title="Uses of Interface org.apache.hadoop.io.RawComparator" class="title">Uses of Interface<br>org.apache.hadoop.io.RawComparator</h2>
</div>
<div class="classUseContainer">
<ul class="blockList">
<li class="blockList">
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing packages, and an explanation">
<caption><span>Packages that use <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Package</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.io">org.apache.hadoop.io</a></td>
<td class="colLast">
<div class="block">Generic i/o code for use when reading and writing data to the network,
to databases, and to files.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.io.serializer">org.apache.hadoop.io.serializer</a></td>
<td class="colLast">
<div class="block">
This package provides a mechanism for using different serialization frameworks
in Hadoop.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapred">org.apache.hadoop.mapred</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.partition">org.apache.hadoop.mapreduce.lib.partition</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.record">org.apache.hadoop.record</a></td>
<td class="colLast">
<div class="block">
(DEPRECATED) Hadoop record I/O contains classes and a record description language
translator for simplifying serialization and deserialization of records in a
language-neutral manner.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList">
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<li class="blockList"><a name="org.apache.hadoop.io">
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</a> that implement <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/WritableComparator.html" title="class in org.apache.hadoop.io">WritableComparator</a></span></code>
<div class="block">A Comparator for <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><code>WritableComparable</code></a>s.</div>
</td>
</tr>
</tbody>
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<li class="blockList"><a name="org.apache.hadoop.io.serializer">
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/io/serializer/package-summary.html">org.apache.hadoop.io.serializer</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../../org/apache/hadoop/io/serializer/package-summary.html">org.apache.hadoop.io.serializer</a> that implement <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink">org.apache.hadoop.io.serializer.DeserializerComparator&lt;T&gt;</span></code>
<div class="block">
A <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> that uses a <code>Deserializer</code> to deserialize
the objects to be compared so that the standard <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util"><code>Comparator</code></a> can
be used to compare them.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/serializer/JavaSerializationComparator.html" title="class in org.apache.hadoop.io.serializer">JavaSerializationComparator</a>&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a> &amp; <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;T&gt;&gt;</span></code>
<div class="block">
A <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> that uses a <a href="../../../../../org/apache/hadoop/io/serializer/JavaSerialization.html" title="class in org.apache.hadoop.io.serializer"><code>JavaSerialization</code></a>
<code>Deserializer</code> to deserialize objects that are then compared via
their <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang"><code>Comparable</code></a> interfaces.</div>
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Methods in <a href="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</a> that return <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#getCombinerKeyGroupingComparator--">getCombinerKeyGroupingComparator</a></span>()</code>
<div class="block">Get the user defined <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><code>WritableComparable</code></a> comparator for
grouping keys of inputs to the combiner.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#getOutputKeyComparator--">getOutputKeyComparator</a></span>()</code>
<div class="block">Get the <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator used to compare keys.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#getOutputValueGroupingComparator--">getOutputValueGroupingComparator</a></span>()</code>
<div class="block">Get the user defined <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><code>WritableComparable</code></a> comparator for
grouping keys of inputs to the reduce.</div>
</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Method parameters in <a href="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</a> with type arguments of type <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#setCombinerKeyGroupingComparator-java.lang.Class-">setCombinerKeyGroupingComparator</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;theClass)</code>
<div class="block">Set the user defined <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator for
grouping keys in the input to the combiner.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#setOutputKeyComparatorClass-java.lang.Class-">setOutputKeyComparatorClass</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;theClass)</code>
<div class="block">Set the <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator used to compare keys.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">JobConf.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/JobConf.html#setOutputValueGroupingComparator-java.lang.Class-">setOutputValueGroupingComparator</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;theClass)</code>
<div class="block">Set the user defined <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator for
grouping keys in the input to the reduce.</div>
</td>
</tr>
</tbody>
</table>
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<li class="blockList"><a name="org.apache.hadoop.mapreduce">
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Methods in <a href="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a> that return <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&lt;?&gt;</code></td>
<td class="colLast"><span class="typeNameLabel">JobContext.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getCombinerKeyGroupingComparator--">getCombinerKeyGroupingComparator</a></span>()</code>
<div class="block">Get the user defined <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator for
grouping keys of inputs to the combiner.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&lt;?&gt;</code></td>
<td class="colLast"><span class="typeNameLabel">JobContext.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getGroupingComparator--">getGroupingComparator</a></span>()</code>
<div class="block">Get the user defined <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator for
grouping keys of inputs to the reduce.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&lt;?&gt;</code></td>
<td class="colLast"><span class="typeNameLabel">JobContext.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getSortComparator--">getSortComparator</a></span>()</code>
<div class="block">Get the <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><code>RawComparator</code></a> comparator used to compare keys.</div>
</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Method parameters in <a href="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a> with type arguments of type <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">Job.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/Job.html#setCombinerKeyGroupingComparatorClass-java.lang.Class-">setCombinerKeyGroupingComparatorClass</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;cls)</code>
<div class="block">Define the comparator that controls which keys are grouped together
for a single call to combiner,
<a href="../../../../../org/apache/hadoop/mapreduce/Reducer.html#reduce-KEYIN-java.lang.Iterable-org.apache.hadoop.mapreduce.Reducer.Context-"><code>Reducer.reduce(Object, Iterable,
org.apache.hadoop.mapreduce.Reducer.Context)</code></a></div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">Job.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/Job.html#setGroupingComparatorClass-java.lang.Class-">setGroupingComparatorClass</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;cls)</code>
<div class="block">Define the comparator that controls which keys are grouped together
for a single call to
<a href="../../../../../org/apache/hadoop/mapreduce/Reducer.html#reduce-KEYIN-java.lang.Iterable-org.apache.hadoop.mapreduce.Reducer.Context-"><code>Reducer.reduce(Object, Iterable,
org.apache.hadoop.mapreduce.Reducer.Context)</code></a></div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><span class="typeNameLabel">Job.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/Job.html#setSortComparatorClass-java.lang.Class-">setSortComparatorClass</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a>&gt;&nbsp;cls)</code>
<div class="block">Define the comparator that controls how the keys are sorted before they
are passed to the <a href="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><code>Reducer</code></a>.</div>
</td>
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/partition/package-summary.html">org.apache.hadoop.mapreduce.lib.partition</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../../org/apache/hadoop/mapreduce/lib/partition/package-summary.html">org.apache.hadoop.mapreduce.lib.partition</a> that implement <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/partition/KeyFieldBasedComparator.html" title="class in org.apache.hadoop.mapreduce.lib.partition">KeyFieldBasedComparator</a>&lt;K,V&gt;</span></code>
<div class="block">This comparator implementation provides a subset of the features provided
by the Unix/GNU Sort.</div>
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<h3>Uses of <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a> in <a href="../../../../../org/apache/hadoop/record/package-summary.html">org.apache.hadoop.record</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
<caption><span>Classes in <a href="../../../../../org/apache/hadoop/record/package-summary.html">org.apache.hadoop.record</a> that implement <a href="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/record/RecordComparator.html" title="class in org.apache.hadoop.record">RecordComparator</a></span></code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.</span></div>
</div>
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