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<h1 title="Uses of Package org.apache.hadoop.io" class="title">Uses of Package<br>org.apache.hadoop.io</h1>
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<caption><span>Packages that use <a href="../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</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.conf">org.apache.hadoop.conf</a></td>
<td class="colLast">
<div class="block">Configuration of system parameters.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.crypto.key.kms">org.apache.hadoop.crypto.key.kms</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs">org.apache.hadoop.fs</a></td>
<td class="colLast">
<div class="block">An abstract file system API.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.permission">org.apache.hadoop.fs.permission</a></td>
<td class="colLast">
<div class="block">This package provides support for HDFS permission and ACL.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.fs.store">org.apache.hadoop.fs.store</a></td>
<td class="colLast">
<div class="block">This package is for classes to be shared across object stores; for internal
use within the hadoop-* modules only.</div>
</td>
</tr>
<tr class="rowColor">
<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>
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</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.io.file.tfile">org.apache.hadoop.io.file.tfile</a></td>
<td class="colLast">&nbsp;</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>
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</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.ipc">org.apache.hadoop.ipc</a></td>
<td class="colLast">
<div class="block">Tools to help define network clients and servers.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.security">org.apache.hadoop.security</a></td>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><a href="#org.apache.hadoop.security.authorize">org.apache.hadoop.security.authorize</a></td>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><a href="#org.apache.hadoop.security.token">org.apache.hadoop.security.token</a></td>
<td class="colLast">&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.security.token.delegation">org.apache.hadoop.security.token.delegation</a></td>
<td class="colLast">&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.security.token.delegation.web">org.apache.hadoop.security.token.delegation.web</a></td>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><a href="#org.apache.hadoop.util">org.apache.hadoop.util</a></td>
<td class="colLast">
<div class="block">Common utilities.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.util.bloom">org.apache.hadoop.util.bloom</a></td>
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<th class="colOne" scope="col">Class and Description</th>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Writable.html#org.apache.hadoop.conf">Writable</a>
<div class="block">A serializable object which implements a simple, efficient, serialization
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Text.html#org.apache.hadoop.crypto.key.kms">Text</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Writable.html#org.apache.hadoop.crypto.key.kms">Writable</a>
<div class="block">A serializable object which implements a simple, efficient, serialization
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/ByteBufferPool.html#org.apache.hadoop.fs">ByteBufferPool</a>&nbsp;</td>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Writable.html#org.apache.hadoop.fs">Writable</a>
<div class="block">A serializable object which implements a simple, efficient, serialization
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Writable.html#org.apache.hadoop.fs.permission">Writable</a>
<div class="block">A serializable object which implements a simple, efficient, serialization
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/Writable.html#org.apache.hadoop.fs.store">Writable</a>
<div class="block">A serializable object which implements a simple, efficient, serialization
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/AbstractMapWritable.html#org.apache.hadoop.io">AbstractMapWritable</a>
<div class="block">Abstract base class for MapWritable and SortedMapWritable
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MapWritable&lt;Writable, MapWritable&gt; so the CLASS_TO_ID and ID_TO_CLASS
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/BinaryComparable.html#org.apache.hadoop.io">BinaryComparable</a>
<div class="block">Interface supported by <a href="../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><code>WritableComparable</code></a>
types supporting ordering/permutation by a representative set of bytes.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/BooleanWritable.html#org.apache.hadoop.io">BooleanWritable</a>
<div class="block">A WritableComparable for booleans.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/ByteBufferPool.html#org.apache.hadoop.io">ByteBufferPool</a>&nbsp;</td>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/BytesWritable.html#org.apache.hadoop.io">BytesWritable</a>
<div class="block">A byte sequence that is usable as a key or value.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/ByteWritable.html#org.apache.hadoop.io">ByteWritable</a>
<div class="block">A WritableComparable for a single byte.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/DoubleWritable.html#org.apache.hadoop.io">DoubleWritable</a>
<div class="block">Writable for Double values.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/FloatWritable.html#org.apache.hadoop.io">FloatWritable</a>
<div class="block">A WritableComparable for floats.</div>
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<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/IntWritable.html#org.apache.hadoop.io">IntWritable</a>
<div class="block">A WritableComparable for ints.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/LongWritable.html#org.apache.hadoop.io">LongWritable</a>
<div class="block">A WritableComparable for longs.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/LongWritable.Comparator.html#org.apache.hadoop.io">LongWritable.Comparator</a>
<div class="block">A Comparator optimized for LongWritable.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapFile.html#org.apache.hadoop.io">MapFile</a>
<div class="block">A file-based map from keys to values.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapFile.Reader.html#org.apache.hadoop.io">MapFile.Reader</a>
<div class="block">Provide access to an existing map.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapFile.Reader.Option.html#org.apache.hadoop.io">MapFile.Reader.Option</a>&nbsp;</td>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapFile.Writer.html#org.apache.hadoop.io">MapFile.Writer</a>
<div class="block">Writes a new map.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapFile.Writer.Option.html#org.apache.hadoop.io">MapFile.Writer.Option</a>&nbsp;</td>
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<tr class="altColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MapWritable.html#org.apache.hadoop.io">MapWritable</a>
<div class="block">A Writable Map.</div>
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<tr class="rowColor">
<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/MD5Hash.html#org.apache.hadoop.io">MD5Hash</a>
<div class="block">A Writable for MD5 hash values.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/NullWritable.html#org.apache.hadoop.io">NullWritable</a>
<div class="block">Singleton Writable with no data.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/ObjectWritable.html#org.apache.hadoop.io">ObjectWritable</a>
<div class="block">A polymorphic Writable that writes an instance with it's class name.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/RawComparator.html#org.apache.hadoop.io">RawComparator</a>
<div class="block">
A <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> that operates directly on byte representations of
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.CompressionType.html#org.apache.hadoop.io">SequenceFile.CompressionType</a>
<div class="block">The compression type used to compress key/value pairs in the
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Metadata.html#org.apache.hadoop.io">SequenceFile.Metadata</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Reader.html#org.apache.hadoop.io">SequenceFile.Reader</a>
<div class="block">Reads key/value pairs from a sequence-format file.</div>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Reader.Option.html#org.apache.hadoop.io">SequenceFile.Reader.Option</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Sorter.RawKeyValueIterator.html#org.apache.hadoop.io">SequenceFile.Sorter.RawKeyValueIterator</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Sorter.SegmentDescriptor.html#org.apache.hadoop.io">SequenceFile.Sorter.SegmentDescriptor</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/SequenceFile.Writer.html#org.apache.hadoop.io">SequenceFile.Writer</a>
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<td class="colOne"><a href="../../../../org/apache/hadoop/io/class-use/VIntWritable.html#org.apache.hadoop.io">VIntWritable</a>
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