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| <div class="subTitle">org.apache.hadoop.mapred.join</div> |
| <h2 title="Class CompositeInputFormat" class="title">Class CompositeInputFormat<K extends <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>></h2> |
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| <li>org.apache.hadoop.mapred.join.CompositeInputFormat<K></li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><K,<a href="../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>>, <a href="../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html" title="interface in org.apache.hadoop.mapred.join">ComposableInputFormat</a><K,<a href="../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class <span class="typeNameLabel">CompositeInputFormat<K extends <a href="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>></span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html" title="interface in org.apache.hadoop.mapred.join">ComposableInputFormat</a><K,<a href="../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></pre> |
| <div class="block">An InputFormat capable of performing joins over a set of data sources sorted |
| and partitioned the same way. |
| |
| A user may define new join types by setting the property |
| <tt>mapred.join.define.<ident></tt> to a classname. In the expression |
| <tt>mapred.join.expr</tt>, the identifier will be assumed to be a |
| ComposableRecordReader. |
| <tt>mapred.join.keycomparator</tt> can be a classname used to compare keys |
| in the join.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#setFormat-org.apache.hadoop.mapred.JobConf-"><code>setFormat(org.apache.hadoop.mapred.JobConf)</code></a>, |
| <a href="../../../../../org/apache/hadoop/mapred/join/JoinRecordReader.html" title="class in org.apache.hadoop.mapred.join"><code>JoinRecordReader</code></a>, |
| <a href="../../../../../org/apache/hadoop/mapred/join/MultiFilterRecordReader.html" title="class in org.apache.hadoop.mapred.join"><code>MultiFilterRecordReader</code></a></dd> |
| </dl> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#CompositeInputFormat--">CompositeInputFormat</a></span>()</code> </td> |
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| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#addDefaults--">addDefaults</a></span>()</code> |
| <div class="block">Adds the default set of identifiers to the parser.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#compose-java.lang.Class-java.lang.String-">compose</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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> path)</code> |
| <div class="block">Convenience method for constructing composite formats.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#compose-java.lang.String-java.lang.Class-org.apache.hadoop.fs.Path...-">compose</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> op, |
| <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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>... path)</code> |
| <div class="block">Convenience method for constructing composite formats.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#compose-java.lang.String-java.lang.Class-java.lang.String...-">compose</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> op, |
| <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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... path)</code> |
| <div class="block">Convenience method for constructing composite formats.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</a><<a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">K</a>,<a href="../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">getRecordReader</a></span>(<a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a> split, |
| <a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| <a href="../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</a> reporter)</code> |
| <div class="block">Construct a CompositeRecordReader for the children of this InputFormat |
| as defined in the init expression.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#getSplits-org.apache.hadoop.mapred.JobConf-int-">getSplits</a></span>(<a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| int numSplits)</code> |
| <div class="block">Build a CompositeInputSplit from the child InputFormats by assigning the |
| ith split from each child to the ith composite split.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#setFormat-org.apache.hadoop.mapred.JobConf-">setFormat</a></span>(<a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job)</code> |
| <div class="block">Interpret a given string as a composite expression.</div> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <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>Constructor Detail</h3> |
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| <h4>CompositeInputFormat</h4> |
| <pre>public CompositeInputFormat()</pre> |
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| <a name="setFormat-org.apache.hadoop.mapred.JobConf-"> |
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| <h4>setFormat</h4> |
| <pre>public void setFormat(<a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Interpret a given string as a composite expression. |
| <code>func ::= <ident>([<func>,]*<func>) |
| func ::= tbl(<class>,"<path>") |
| class ::= @see java.lang.Class#forName(java.lang.String) |
| path ::= @see org.apache.hadoop.fs.Path#Path(java.lang.String) |
| </code> |
| Reads expression from the <tt>mapred.join.expr</tt> property and |
| user-supplied join types from <tt>mapred.join.define.<ident></tt> |
| types. Paths supplied to <tt>tbl</tt> are given as input paths to the |
| InputFormat class listed.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html#compose-java.lang.String-java.lang.Class-java.lang.String...-"><code>compose(java.lang.String, java.lang.Class, java.lang.String...)</code></a></dd> |
| </dl> |
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| <h4>addDefaults</h4> |
| <pre>protected void addDefaults()</pre> |
| <div class="block">Adds the default set of identifiers to the parser.</div> |
| </li> |
| </ul> |
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| <h4>getSplits</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a>[] getSplits(<a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| int numSplits) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Build a CompositeInputSplit from the child InputFormats by assigning the |
| ith split from each child to the ith composite split.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/mapred/InputFormat.html#getSplits-org.apache.hadoop.mapred.JobConf-int-">getSplits</a></code> in interface <code><a href="../../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><<a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">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/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>job</code> - job configuration.</dd> |
| <dd><code>numSplits</code> - the desired number of splits, a hint.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an array of <a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a>s for the job.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-"> |
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| <h4>getRecordReader</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/mapred/join/ComposableRecordReader.html" title="interface in org.apache.hadoop.mapred.join">ComposableRecordReader</a><<a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">K</a>,<a href="../../../../../org/apache/hadoop/mapred/join/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>> getRecordReader(<a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a> split, |
| <a href="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| <a href="../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</a> reporter) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Construct a CompositeRecordReader for the children of this InputFormat |
| as defined in the init expression. |
| The outermost join need only be composable, not necessarily a composite. |
| Mandating TupleWritable isn't strictly correct.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/mapred/InputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">getRecordReader</a></code> in interface <code><a href="../../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><<a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">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/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">getRecordReader</a></code> in interface <code><a href="../../../../../org/apache/hadoop/mapred/join/ComposableInputFormat.html" title="interface in org.apache.hadoop.mapred.join">ComposableInputFormat</a><<a href="../../../../../org/apache/hadoop/mapred/join/CompositeInputFormat.html" title="type parameter in CompositeInputFormat">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/TupleWritable.html" title="class in org.apache.hadoop.mapred.join">TupleWritable</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>split</code> - the <a href="../../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a></dd> |
| <dd><code>job</code> - the job that this split belongs to</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a <a href="../../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><code>RecordReader</code></a></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="compose-java.lang.Class-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>compose</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> compose(<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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> path)</pre> |
| <div class="block">Convenience method for constructing composite formats. |
| Given InputFormat class (inf), path (p) return: |
| <code>tbl(<inf>, <p>) </code></div> |
| </li> |
| </ul> |
| <a name="compose-java.lang.String-java.lang.Class-java.lang.String...-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>compose</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> compose(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> op, |
| <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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... path)</pre> |
| <div class="block">Convenience method for constructing composite formats. |
| Given operation (op), Object class (inf), set of paths (p) return: |
| <code><op>(tbl(<inf>,<p1>),tbl(<inf>,<p2>),...,tbl(<inf>,<pn>)) </code></div> |
| </li> |
| </ul> |
| <a name="compose-java.lang.String-java.lang.Class-org.apache.hadoop.fs.Path...-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
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| <h4>compose</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> compose(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> op, |
| <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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a>> inf, |
| <a href="../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>... path)</pre> |
| <div class="block">Convenience method for constructing composite formats. |
| Given operation (op), Object class (inf), set of paths (p) return: |
| <code><op>(tbl(<inf>,<p1>),tbl(<inf>,<p2>),...,tbl(<inf>,<pn>)) </code></div> |
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