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| <h2 title="Uses of Class org.apache.hadoop.mapreduce.Mapper" class="title">Uses of Class<br>org.apache.hadoop.mapreduce.Mapper</h2> |
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| <caption><span>Packages that use <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </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.mapreduce">org.apache.hadoop.mapreduce</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.aggregate">org.apache.hadoop.mapreduce.lib.aggregate</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.chain">org.apache.hadoop.mapreduce.lib.chain</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.fieldsel">org.apache.hadoop.mapreduce.lib.fieldsel</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.input">org.apache.hadoop.mapreduce.lib.input</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.map">org.apache.hadoop.mapreduce.lib.map</a></td> |
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| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</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 types with arguments of type <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </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="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a><?,?,?,?>></code></td> |
| <td class="colLast"><span class="typeNameLabel">JobContext.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getMapperClass--">getMapperClass</a></span>()</code> |
| <div class="block">Get the <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> class for the job.</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/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </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#setMapperClass-java.lang.Class-">setMapperClass</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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a>> cls)</code> |
| <div class="block">Set the <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> for the job.</div> |
| </td> |
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| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/aggregate/package-summary.html">org.apache.hadoop.mapreduce.lib.aggregate</a></h3> |
| <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing subclasses, and an explanation"> |
| <caption><span>Subclasses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/aggregate/package-summary.html">org.apache.hadoop.mapreduce.lib.aggregate</a></span><span class="tabEnd"> </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 </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/aggregate/ValueAggregatorMapper.html" title="class in org.apache.hadoop.mapreduce.lib.aggregate">ValueAggregatorMapper</a><K1 extends <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a><?>,V1 extends <a href="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>></span></code> |
| <div class="block">This class implements the generic mapper of Aggregate.</div> |
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| </a> |
| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/chain/package-summary.html">org.apache.hadoop.mapreduce.lib.chain</a></h3> |
| <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing subclasses, and an explanation"> |
| <caption><span>Subclasses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/chain/package-summary.html">org.apache.hadoop.mapreduce.lib.chain</a></span><span class="tabEnd"> </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 </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/chain/ChainMapper.html" title="class in org.apache.hadoop.mapreduce.lib.chain">ChainMapper</a><KEYIN,VALUEIN,KEYOUT,VALUEOUT></span></code> |
| <div class="block">The ChainMapper class allows to use multiple Mapper classes within a single |
| Map task.</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/lib/chain/package-summary.html">org.apache.hadoop.mapreduce.lib.chain</a> with type arguments of type <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </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>static void</code></td> |
| <td class="colLast"><span class="typeNameLabel">ChainReducer.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/chain/ChainReducer.html#addMapper-org.apache.hadoop.mapreduce.Job-java.lang.Class-java.lang.Class-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.conf.Configuration-">addMapper</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</a> job, |
| <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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a>> klass, |
| <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><?> inputKeyClass, |
| <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><?> inputValueClass, |
| <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><?> outputKeyClass, |
| <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><?> outputValueClass, |
| <a href="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> mapperConf)</code> |
| <div class="block">Adds a <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> class to the chain reducer.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><span class="typeNameLabel">ChainMapper.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/chain/ChainMapper.html#addMapper-org.apache.hadoop.mapreduce.Job-java.lang.Class-java.lang.Class-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.conf.Configuration-">addMapper</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</a> job, |
| <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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a>> klass, |
| <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><?> inputKeyClass, |
| <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><?> inputValueClass, |
| <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><?> outputKeyClass, |
| <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><?> outputValueClass, |
| <a href="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> mapperConf)</code> |
| <div class="block">Adds a <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> class to the chain mapper.</div> |
| </td> |
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| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/fieldsel/package-summary.html">org.apache.hadoop.mapreduce.lib.fieldsel</a></h3> |
| <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing subclasses, and an explanation"> |
| <caption><span>Subclasses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/fieldsel/package-summary.html">org.apache.hadoop.mapreduce.lib.fieldsel</a></span><span class="tabEnd"> </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 </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/fieldsel/FieldSelectionMapper.html" title="class in org.apache.hadoop.mapreduce.lib.fieldsel">FieldSelectionMapper</a><K,V></span></code> |
| <div class="block">This class implements a mapper class that can be used to perform |
| field selections in a manner similar to unix cut.</div> |
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| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/input/package-summary.html">org.apache.hadoop.mapreduce.lib.input</a></h3> |
| <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/lib/input/package-summary.html">org.apache.hadoop.mapreduce.lib.input</a> with type arguments of type <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </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>static void</code></td> |
| <td class="colLast"><span class="typeNameLabel">MultipleInputs.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/input/MultipleInputs.html#addInputPath-org.apache.hadoop.mapreduce.Job-org.apache.hadoop.fs.Path-java.lang.Class-java.lang.Class-">addInputPath</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</a> job, |
| <a href="../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path, |
| <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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce">InputFormat</a>> inputFormatClass, |
| <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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a>> mapperClass)</code> |
| <div class="block">Add a <a href="../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a> with a custom <a href="../../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce"><code>InputFormat</code></a> and |
| <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> to the list of inputs for the map-reduce job.</div> |
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| <h3>Uses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</a></h3> |
| <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing subclasses, and an explanation"> |
| <caption><span>Subclasses of <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a> in <a href="../../../../../org/apache/hadoop/mapreduce/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</a></span><span class="tabEnd"> </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 </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/InverseMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">InverseMapper</a><K,V></span></code> |
| <div class="block">A <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> that swaps keys and values.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">MultithreadedMapper</a><K1,V1,K2,V2></span></code> |
| <div class="block">Multithreaded implementation for @link org.apache.hadoop.mapreduce.Mapper.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/RegexMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">RegexMapper</a><K></span></code> |
| <div class="block">A <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> that extracts text matching a regular expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/TokenCounterMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">TokenCounterMapper</a></span></code> |
| <div class="block">Tokenize the input values and emit each word with a count of 1.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/WrappedMapper.html" title="class in org.apache.hadoop.mapreduce.lib.map">WrappedMapper</a><KEYIN,VALUEIN,KEYOUT,VALUEOUT></span></code> |
| <div class="block">A <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a> which wraps a given one to allow custom |
| <code>Mapper.Context</code> implementations.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <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/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</a> that return types with arguments of type <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
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| <td class="colFirst"><code>static <K1,V1,K2,V2><br><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><<a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a><K1,V1,K2,V2>></code></td> |
| <td class="colLast"><span class="typeNameLabel">MultithreadedMapper.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html#getMapperClass-org.apache.hadoop.mapreduce.JobContext-">getMapperClass</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/JobContext.html" title="interface in org.apache.hadoop.mapreduce">JobContext</a> job)</code> |
| <div class="block">Get the application's mapper class.</div> |
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| <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/lib/map/package-summary.html">org.apache.hadoop.mapreduce.lib.map</a> with type arguments of type <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a></span><span class="tabEnd"> </span></caption> |
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| <td class="colFirst"><code>static <K1,V1,K2,V2><br>void</code></td> |
| <td class="colLast"><span class="typeNameLabel">MultithreadedMapper.</span><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/lib/map/MultithreadedMapper.html#setMapperClass-org.apache.hadoop.mapreduce.Job-java.lang.Class-">setMapperClass</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</a> job, |
| <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><? extends <a href="../../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper</a><K1,V1,K2,V2>> cls)</code> |
| <div class="block">Set the application's mapper class.</div> |
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