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<div class="subTitle">org.apache.hadoop.record</div>
<h2 title="Class RecordComparator" class="title">Class RecordComparator</h2>
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<li>org.apache.hadoop.record.RecordComparator</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util">Comparator</a>, <a href="../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</a>, <a href="../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></dd>
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@InterfaceAudience.Public
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public abstract class <span class="typeNameLabel">RecordComparator</span>
extends <a href="../../../../org/apache/hadoop/io/WritableComparator.html" title="class in org.apache.hadoop.io">WritableComparator</a></pre>
<div class="block">A raw record comparator base class</div>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/record/RecordComparator.html#RecordComparator-java.lang.Class-">RecordComparator</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/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>&gt;&nbsp;recordClass)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Construct a raw <a href="../../../../org/apache/hadoop/record/Record.html" title="class in org.apache.hadoop.record"><code>Record</code></a> comparison implementation.</div>
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<td class="colFirst"><code>abstract int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/record/RecordComparator.html#compare-byte:A-int-int-byte:A-int-int-">compare</a></span>(byte[]&nbsp;b1,
int&nbsp;s1,
int&nbsp;l1,
byte[]&nbsp;b2,
int&nbsp;s2,
int&nbsp;l2)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Optimization hook.</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/record/RecordComparator.html#define-java.lang.Class-org.apache.hadoop.record.RecordComparator-">define</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>&nbsp;c,
<a href="../../../../org/apache/hadoop/record/RecordComparator.html" title="class in org.apache.hadoop.record">RecordComparator</a>&nbsp;comparator)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Register an optimized comparator for a <a href="../../../../org/apache/hadoop/record/Record.html" title="class in org.apache.hadoop.record"><code>Record</code></a> implementation.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.io.<a href="../../../../org/apache/hadoop/io/WritableComparator.html" title="class in org.apache.hadoop.io">WritableComparator</a></h3>
<code><a href="../../../../org/apache/hadoop/io/WritableComparator.html#compare-java.lang.Object-java.lang.Object-">compare</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#compare-org.apache.hadoop.io.WritableComparable-org.apache.hadoop.io.WritableComparable-">compare</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#compareBytes-byte:A-int-int-byte:A-int-int-">compareBytes</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#define-java.lang.Class-org.apache.hadoop.io.WritableComparator-">define</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#get-java.lang.Class-">get</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#get-java.lang.Class-org.apache.hadoop.conf.Configuration-">get</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#getConf--">getConf</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#getKeyClass--">getKeyClass</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#hashBytes-byte:A-int-">hashBytes</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#hashBytes-byte:A-int-int-">hashBytes</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#newKey--">newKey</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readDouble-byte:A-int-">readDouble</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readFloat-byte:A-int-">readFloat</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readInt-byte:A-int-">readInt</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readLong-byte:A-int-">readLong</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readUnsignedShort-byte:A-int-">readUnsignedShort</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readVInt-byte:A-int-">readVInt</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#readVLong-byte:A-int-">readVLong</a>, <a href="../../../../org/apache/hadoop/io/WritableComparator.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Methods inherited from interface&nbsp;java.util.<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util">Comparator</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#comparing-java.util.function.Function-" title="class or interface in java.util">comparing</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#comparing-java.util.function.Function-java.util.Comparator-" title="class or interface in java.util">comparing</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#comparingDouble-java.util.function.ToDoubleFunction-" title="class or interface in java.util">comparingDouble</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#comparingInt-java.util.function.ToIntFunction-" title="class or interface in java.util">comparingInt</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#comparingLong-java.util.function.ToLongFunction-" title="class or interface in java.util">comparingLong</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.util">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#naturalOrder--" title="class or interface in java.util">naturalOrder</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#nullsFirst-java.util.Comparator-" title="class or interface in java.util">nullsFirst</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#nullsLast-java.util.Comparator-" title="class or interface in java.util">nullsLast</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#reversed--" title="class or interface in java.util">reversed</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#reverseOrder--" title="class or interface in java.util">reverseOrder</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparing-java.util.Comparator-" title="class or interface in java.util">thenComparing</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparing-java.util.function.Function-" title="class or interface in java.util">thenComparing</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparing-java.util.function.Function-java.util.Comparator-" title="class or interface in java.util">thenComparing</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparingDouble-java.util.function.ToDoubleFunction-" title="class or interface in java.util">thenComparingDouble</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparingInt-java.util.function.ToIntFunction-" title="class or interface in java.util">thenComparingInt</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html?is-external=true#thenComparingLong-java.util.function.ToLongFunction-" title="class or interface in java.util">thenComparingLong</a></code></li>
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<h4>RecordComparator</h4>
<pre>protected&nbsp;RecordComparator(<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/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>&gt;&nbsp;recordClass)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Construct a raw <a href="../../../../org/apache/hadoop/record/Record.html" title="class in org.apache.hadoop.record"><code>Record</code></a> comparison implementation.</div>
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<h4>compare</h4>
<pre>public abstract&nbsp;int&nbsp;compare(byte[]&nbsp;b1,
int&nbsp;s1,
int&nbsp;l1,
byte[]&nbsp;b2,
int&nbsp;s2,
int&nbsp;l2)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../org/apache/hadoop/io/WritableComparator.html#compare-byte:A-int-int-byte:A-int-int-">WritableComparator</a></code></span></div>
<div class="block">Optimization hook. Override this to make SequenceFile.Sorter's scream.
<p>The default implementation reads the data into two <a href="../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><code>WritableComparable</code></a>s (using <a href="../../../../org/apache/hadoop/io/Writable.html#readFields-java.io.DataInput-"><code>Writable.readFields(DataInput)</code></a>, then calls <a href="../../../../org/apache/hadoop/io/WritableComparator.html#compare-org.apache.hadoop.io.WritableComparable-org.apache.hadoop.io.WritableComparable-"><code>WritableComparator.compare(WritableComparable,WritableComparable)</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/hadoop/io/RawComparator.html#compare-byte:A-int-int-byte:A-int-int-">compare</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../org/apache/hadoop/io/WritableComparator.html#compare-byte:A-int-int-byte:A-int-int-">compare</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/hadoop/io/WritableComparator.html" title="class in org.apache.hadoop.io">WritableComparator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>b1</code> - The first byte array.</dd>
<dd><code>s1</code> - The position index in b1. The object under comparison's starting index.</dd>
<dd><code>l1</code> - The length of the object in b1.</dd>
<dd><code>b2</code> - The second byte array.</dd>
<dd><code>s2</code> - The position index in b2. The object under comparison's starting index.</dd>
<dd><code>l2</code> - The length of the object under comparison in b2.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>An integer result of the comparison.</dd>
</dl>
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<h4>define</h4>
<pre>public static&nbsp;void&nbsp;define(<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>&nbsp;c,
<a href="../../../../org/apache/hadoop/record/RecordComparator.html" title="class in org.apache.hadoop.record">RecordComparator</a>&nbsp;comparator)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Register an optimized comparator for a <a href="../../../../org/apache/hadoop/record/Record.html" title="class in org.apache.hadoop.record"><code>Record</code></a> implementation.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - record classs for which a raw comparator is provided</dd>
<dd><code>comparator</code> - Raw comparator instance for class c</dd>
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