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<div class="subTitle">gobblin.source.extractor.hadoop</div>
<h2 title="Class HadoopFileInputExtractor" class="title">Class HadoopFileInputExtractor&lt;S,D,K,V&gt;</h2>
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<li>gobblin.source.extractor.hadoop.HadoopFileInputExtractor&lt;S,D,K,V&gt;</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a>&lt;S,D&gt;, <a href="https://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></dd>
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<pre>public abstract class <span class="typeNameLabel">HadoopFileInputExtractor&lt;S,D,K,V&gt;</span>
extends <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a>&lt;S,D&gt;</pre>
<div class="block">An implementation of <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor"><code>Extractor</code></a> that uses a Hadoop <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>RecordReader</code></a> to read records
from a <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/lib/input/FileSplit.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce.lib.input"><code>FileSplit</code></a>.
<p>
This class can read either keys of type K or values of type V using the
given <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>RecordReader</code></a>, depending on the value of the second argument of the constructor
<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#HadoopFileInputExtractor-org.apache.hadoop.mapreduce.RecordReader-boolean-"><code>HadoopFileInputExtractor(RecordReader, boolean)</code></a>. It will read keys if the argument
is <code>true</code>, otherwise it will read values. Normally, this is specified using the property
<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputSource.html#FILE_INPUT_READ_KEYS_KEY"><code>HadoopFileInputSource.FILE_INPUT_READ_KEYS_KEY</code></a>, which is <code>false</code> by default.
</p>
<p>
This class provides a default implementation of <a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#readRecord-D-"><code>readRecord(Object)</code></a> that simply casts
the keys or values read by the <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>RecordReader</code></a> into type D. It is required
that type K or V can be safely casted to type D.
</p>
<p>
The Hadoop <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>RecordReader</code></a> is passed into this class, which is responsible for closing
it by calling <a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true#close--" title="class or interface in org.apache.hadoop.mapreduce"><code>RecordReader.close()</code></a> in <a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#close--"><code>close()</code></a>.
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A concrete implementation of this class should at least implement the <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#getSchema--" title="class or interface in gobblin.source.extractor"><code>Extractor.getSchema()</code></a>
method.
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#HadoopFileInputExtractor-org.apache.hadoop.mapreduce.RecordReader-boolean-">HadoopFileInputExtractor</a></span>(<a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce">RecordReader</a>&lt;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">K</a>,<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">V</a>&gt;&nbsp;recordReader,
boolean&nbsp;readKeys)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#close--">close</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#getExpectedRecordCount--">getExpectedRecordCount</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#getHighWatermark--">getHighWatermark</a></span>()</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html#readRecord-D-">readRecord</a></span>(<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&nbsp;reuse)</code>
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<code><a href="https://docs.oracle.com/javase/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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;gobblin.source.extractor.<a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a></h3>
<code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#getSchema--" title="class or interface in gobblin.source.extractor">getSchema</a>, <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#readRecordEnvelope--" title="class or interface in gobblin.source.extractor">readRecordEnvelope</a>, <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#recordStream-java.util.concurrent.atomic.AtomicBoolean-" title="class or interface in gobblin.source.extractor">recordStream</a></code></li>
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<h4>HadoopFileInputExtractor</h4>
<pre>public&nbsp;HadoopFileInputExtractor(<a href="http://hadoop.apache.org/docs/r2.3.0/api/org/apache/hadoop/mapreduce/RecordReader.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce">RecordReader</a>&lt;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">K</a>,<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">V</a>&gt;&nbsp;recordReader,
boolean&nbsp;readKeys)</pre>
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<h4>readRecord</h4>
<pre>public&nbsp;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&nbsp;readRecord(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&nbsp;reuse)
throws <a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/DataRecordException.html?is-external=true" title="class or interface in gobblin.source.extractor">DataRecordException</a>,
<a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">.
This method will throw a <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang"><code>ClassCastException</code></a> if type <code>#<D></code> is not compatible
with type <code>#<K></code> if keys are supposed to be read, or if it is not compatible with type
<code>#<V></code> if values are supposed to be read.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#readRecord-D-" title="class or interface in gobblin.source.extractor">readRecord</a></code>&nbsp;in interface&nbsp;<code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a>&lt;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">S</a>,<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&gt;</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/DataRecordException.html?is-external=true" title="class or interface in gobblin.source.extractor">DataRecordException</a></code></dd>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>getExpectedRecordCount</h4>
<pre>public&nbsp;long&nbsp;getExpectedRecordCount()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#getExpectedRecordCount--" title="class or interface in gobblin.source.extractor">getExpectedRecordCount</a></code>&nbsp;in interface&nbsp;<code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a>&lt;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">S</a>,<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&gt;</code></dd>
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<h4>getHighWatermark</h4>
<pre>public&nbsp;long&nbsp;getHighWatermark()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true#getHighWatermark--" title="class or interface in gobblin.source.extractor">getHighWatermark</a></code>&nbsp;in interface&nbsp;<code><a href="http://linkedin.github.io/gobblin/javadoc/0.11.0/gobblin-api/gobblin/source/extractor/Extractor.html?is-external=true" title="class or interface in gobblin.source.extractor">Extractor</a>&lt;<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">S</a>,<a href="../../../../gobblin/source/extractor/hadoop/HadoopFileInputExtractor.html" title="type parameter in HadoopFileInputExtractor">D</a>&gt;</code></dd>
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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