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<h1 title="Package" class="title">Package&nbsp;org.apache.beam.sdk.io</h1>
<div class="docSummary">
<div class="block">Defines transforms for reading and writing common storage formats, including <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html" title="class in org.apache.beam.sdk.io"><code>AvroIO</code></a>, and <a href="../../../../../org/apache/beam/sdk/io/TextIO.html" title="class in org.apache.beam.sdk.io"><code>TextIO</code></a>.</div>
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<p>See:&nbsp;<a href="#package.description">Description</a></p>
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<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.RecordFormatter.html" title="interface in org.apache.beam.sdk.io">AvroIO.RecordFormatter</a>&lt;ElementT&gt;</td>
<td class="colLast">
<div class="block">Formats an element of a user type into a record with the given schema.</div>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CompressedSource.DecompressingChannelFactory.html" title="interface in org.apache.beam.sdk.io">CompressedSource.DecompressingChannelFactory</a></td>
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<div class="block">Factory interface for creating channels that decompress the content of an underlying channel.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.OutputFileHints.html" title="interface in org.apache.beam.sdk.io">FileBasedSink.OutputFileHints</a></td>
<td class="colLast">
<div class="block">Provides hints about how to generate output files, such as a suggested filename suffix (e.g.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.WritableByteChannelFactory.html" title="interface in org.apache.beam.sdk.io">FileBasedSink.WritableByteChannelFactory</a></td>
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<div class="block">Implementations create instances of <code>WritableByteChannel</code> used by <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink</code></a>
and related classes to allow <em>decorating</em>, or otherwise transforming, the raw data that
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.Sink.html" title="interface in org.apache.beam.sdk.io">FileIO.Sink</a>&lt;ElementT&gt;</td>
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<div class="block">Specifies how to write elements to individual files in <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#write--"><code>FileIO.write()</code></a> and <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#writeDynamic--"><code>FileIO.writeDynamic()</code></a>.</div>
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<div class="block">A policy for generating names for shard files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileSystemRegistrar.html" title="interface in org.apache.beam.sdk.io">FileSystemRegistrar</a></td>
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<div class="block">A registrar that creates <a href="../../../../../org/apache/beam/sdk/io/FileSystem.html" title="class in org.apache.beam.sdk.io"><code>FileSystem</code></a> instances from <a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options"><code>PipelineOptions</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a></td>
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<div class="block">A marker representing the progress and state of an <a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a>.</div>
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<th class="colFirst" scope="col">Class</th>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.html" title="class in org.apache.beam.sdk.io">AvroIO</a></td>
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<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a>s for reading and writing Avro files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.Parse.html" title="class in org.apache.beam.sdk.io">AvroIO.Parse</a>&lt;T&gt;</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.ParseAll.html" title="class in org.apache.beam.sdk.io">AvroIO.ParseAll</a>&lt;T&gt;</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.Read.html" title="class in org.apache.beam.sdk.io">AvroIO.Read</a>&lt;T&gt;</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.ReadAll.html" title="class in org.apache.beam.sdk.io">AvroIO.ReadAll</a>&lt;T&gt;</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.Sink.html" title="class in org.apache.beam.sdk.io">AvroIO.Sink</a>&lt;ElementT&gt;</td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html#sink-java.lang.Class-"><code>AvroIO.sink(java.lang.Class&lt;ElementT&gt;)</code></a> and <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html#sinkViaGenericRecords-org.apache.avro.Schema-org.apache.beam.sdk.io.AvroIO.RecordFormatter-"><code>AvroIO.sinkViaGenericRecords(org.apache.avro.Schema, org.apache.beam.sdk.io.AvroIO.RecordFormatter&lt;ElementT&gt;)</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.TypedWrite.html" title="class in org.apache.beam.sdk.io">AvroIO.TypedWrite</a>&lt;UserT,DestinationT,OutputT&gt;</td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html#write-java.lang.Class-"><code>AvroIO.write(java.lang.Class&lt;T&gt;)</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroIO.Write.html" title="class in org.apache.beam.sdk.io">AvroIO.Write</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">This class is used as the default return value of <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html#write-java.lang.Class-"><code>AvroIO.write(java.lang.Class&lt;T&gt;)</code></a></div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroSource.html" title="class in org.apache.beam.sdk.io">AvroSource</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">Do not use in pipelines directly: most users should use <a href="../../../../../org/apache/beam/sdk/io/AvroIO.Read.html" title="class in org.apache.beam.sdk.io"><code>AvroIO.Read</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/AvroSource.AvroReader.html" title="class in org.apache.beam.sdk.io">AvroSource.AvroReader</a>&lt;T&gt;</td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/BlockBasedSource.BlockBasedReader.html" title="class in org.apache.beam.sdk.io"><code>BlockBasedSource.BlockBasedReader</code></a> for reading blocks from Avro files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BlockBasedSource.html" title="class in org.apache.beam.sdk.io">BlockBasedSource</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">A <code>BlockBasedSource</code> is a <a href="../../../../../org/apache/beam/sdk/io/FileBasedSource.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSource</code></a> where a file consists of blocks of
records.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BlockBasedSource.Block.html" title="class in org.apache.beam.sdk.io">BlockBasedSource.Block</a>&lt;T&gt;</td>
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<div class="block">A <code>Block</code> represents a block of records that can be read.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BlockBasedSource.BlockBasedReader.html" title="class in org.apache.beam.sdk.io">BlockBasedSource.BlockBasedReader</a>&lt;T&gt;</td>
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<div class="block">A <code>Reader</code> that reads records from a <a href="../../../../../org/apache/beam/sdk/io/BlockBasedSource.html" title="class in org.apache.beam.sdk.io"><code>BlockBasedSource</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BoundedReadFromUnboundedSource.html" title="class in org.apache.beam.sdk.io">BoundedReadFromUnboundedSource</a>&lt;T&gt;</td>
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<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that reads a bounded amount of data from an <a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource</code></a>, specified
as one or both of a maximum number of elements or a maximum period of time to read.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BoundedSource.html" title="class in org.apache.beam.sdk.io">BoundedSource</a>&lt;T&gt;</td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/Source.html" title="class in org.apache.beam.sdk.io"><code>Source</code></a> that reads a finite amount of input and, because of that, supports some
additional operations.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/BoundedSource.BoundedReader.html" title="class in org.apache.beam.sdk.io">BoundedSource.BoundedReader</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">A <code>Reader</code> that reads a bounded amount of input and supports some additional operations,
such as progress estimation and dynamic work rebalancing.</div>
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</tr>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CompressedSource.html" title="class in org.apache.beam.sdk.io">CompressedSource</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">A Source that reads from compressed files.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CompressedSource.CompressedReader.html" title="class in org.apache.beam.sdk.io">CompressedSource.CompressedReader</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">Reader for a <a href="../../../../../org/apache/beam/sdk/io/CompressedSource.html" title="class in org.apache.beam.sdk.io"><code>CompressedSource</code></a>.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.html" title="class in org.apache.beam.sdk.io">CountingSource</a></td>
<td class="colLast">
<div class="block">Most users should use <a href="../../../../../org/apache/beam/sdk/io/GenerateSequence.html" title="class in org.apache.beam.sdk.io"><code>GenerateSequence</code></a> instead.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.CounterMark.html" title="class in org.apache.beam.sdk.io">CountingSource.CounterMark</a></td>
<td class="colLast">
<div class="block">The checkpoint for an unbounded <a href="../../../../../org/apache/beam/sdk/io/CountingSource.html" title="class in org.apache.beam.sdk.io"><code>CountingSource</code></a> is simply the last value produced.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/DefaultFilenamePolicy.html" title="class in org.apache.beam.sdk.io">DefaultFilenamePolicy</a></td>
<td class="colLast">
<div class="block">A default <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.FilenamePolicy.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink.FilenamePolicy</code></a> for windowed and unwindowed files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/DefaultFilenamePolicy.Params.html" title="class in org.apache.beam.sdk.io">DefaultFilenamePolicy.Params</a></td>
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<div class="block">Encapsulates constructor parameters to <a href="../../../../../org/apache/beam/sdk/io/DefaultFilenamePolicy.html" title="class in org.apache.beam.sdk.io"><code>DefaultFilenamePolicy</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/DefaultFilenamePolicy.ParamsCoder.html" title="class in org.apache.beam.sdk.io">DefaultFilenamePolicy.ParamsCoder</a></td>
<td class="colLast">
<div class="block">A Coder for <a href="../../../../../org/apache/beam/sdk/io/DefaultFilenamePolicy.Params.html" title="class in org.apache.beam.sdk.io"><code>DefaultFilenamePolicy.Params</code></a>.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/DynamicAvroDestinations.html" title="class in org.apache.beam.sdk.io">DynamicAvroDestinations</a>&lt;UserT,DestinationT,OutputT&gt;</td>
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<div class="block">A specialization of <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.DynamicDestinations.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink.DynamicDestinations</code></a> for <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html" title="class in org.apache.beam.sdk.io"><code>AvroIO</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/DynamicFileDestinations.html" title="class in org.apache.beam.sdk.io">DynamicFileDestinations</a></td>
<td class="colLast">
<div class="block">Some helper classes that derive from <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.DynamicDestinations.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink.DynamicDestinations</code></a>.</div>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io">FileBasedSink</a>&lt;UserT,DestinationT,OutputT&gt;</td>
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<div class="block">Abstract class for file-based output.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.DynamicDestinations.html" title="class in org.apache.beam.sdk.io">FileBasedSink.DynamicDestinations</a>&lt;UserT,DestinationT,OutputT&gt;</td>
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<div class="block">A class that allows value-dependent writes in <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.FilenamePolicy.html" title="class in org.apache.beam.sdk.io">FileBasedSink.FilenamePolicy</a></td>
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<div class="block">A naming policy for output files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.FileResult.html" title="class in org.apache.beam.sdk.io">FileBasedSink.FileResult</a>&lt;DestinationT&gt;</td>
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<div class="block">Result of a single bundle write.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.FileResultCoder.html" title="class in org.apache.beam.sdk.io">FileBasedSink.FileResultCoder</a>&lt;DestinationT&gt;</td>
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<div class="block">A coder for <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.FileResult.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink.FileResult</code></a> objects.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.WriteOperation.html" title="class in org.apache.beam.sdk.io">FileBasedSink.WriteOperation</a>&lt;DestinationT,OutputT&gt;</td>
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<div class="block">Abstract operation that manages the process of writing to <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.Writer.html" title="class in org.apache.beam.sdk.io">FileBasedSink.Writer</a>&lt;DestinationT,OutputT&gt;</td>
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<div class="block">Abstract writer that writes a bundle to a <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSource.html" title="class in org.apache.beam.sdk.io">FileBasedSource</a>&lt;T&gt;</td>
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<div class="block">A common base class for all file-based <a href="../../../../../org/apache/beam/sdk/io/Source.html" title="class in org.apache.beam.sdk.io"><code>Source</code></a>s.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSource.FileBasedReader.html" title="class in org.apache.beam.sdk.io">FileBasedSource.FileBasedReader</a>&lt;T&gt;</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.html" title="class in org.apache.beam.sdk.io">FileIO</a></td>
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<div class="block">General-purpose transforms for working with files: listing files (matching), reading and writing.</div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.Match.html" title="class in org.apache.beam.sdk.io">FileIO.Match</a></td>
<td class="colLast">
<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#match--"><code>FileIO.match()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.MatchAll.html" title="class in org.apache.beam.sdk.io">FileIO.MatchAll</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#matchAll--"><code>FileIO.matchAll()</code></a>.</div>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.MatchConfiguration.html" title="class in org.apache.beam.sdk.io">FileIO.MatchConfiguration</a></td>
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<div class="block">Describes configuration for matching filepatterns, such as <a href="../../../../../org/apache/beam/sdk/io/fs/EmptyMatchTreatment.html" title="enum in org.apache.beam.sdk.io.fs"><code>EmptyMatchTreatment</code></a> and
continuous watching for matching files.</div>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.ReadableFile.html" title="class in org.apache.beam.sdk.io">FileIO.ReadableFile</a></td>
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<div class="block">A utility class for accessing a potentially compressed file.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.ReadMatches.html" title="class in org.apache.beam.sdk.io">FileIO.ReadMatches</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#readMatches--"><code>FileIO.readMatches()</code></a>.</div>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileIO.Write.html" title="class in org.apache.beam.sdk.io">FileIO.Write</a>&lt;DestinationT,UserT&gt;</td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#write--"><code>FileIO.write()</code></a> and <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#writeDynamic--"><code>FileIO.writeDynamic()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileSystem.html" title="class in org.apache.beam.sdk.io">FileSystem</a>&lt;ResourceIdT extends <a href="../../../../../org/apache/beam/sdk/io/fs/ResourceId.html" title="interface in org.apache.beam.sdk.io.fs">ResourceId</a>&gt;</td>
<td class="colLast">
<div class="block">File system interface in Beam.</div>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileSystems.html" title="class in org.apache.beam.sdk.io">FileSystems</a></td>
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<div class="block">Clients facing <a href="../../../../../org/apache/beam/sdk/io/FileSystem.html" title="class in org.apache.beam.sdk.io"><code>FileSystem</code></a> utility.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/GenerateSequence.html" title="class in org.apache.beam.sdk.io">GenerateSequence</a></td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that produces longs starting from the given value, and either up to the
given limit or until <code>Long.MAX_VALUE</code> / until the given time elapses.</div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/LocalFileSystemRegistrar.html" title="class in org.apache.beam.sdk.io">LocalFileSystemRegistrar</a></td>
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<div class="block"><code>AutoService</code> registrar for the <code>LocalFileSystem</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/LocalResources.html" title="class in org.apache.beam.sdk.io">LocalResources</a></td>
<td class="colLast">
<div class="block">Helper functions for producing a <a href="../../../../../org/apache/beam/sdk/io/fs/ResourceId.html" title="interface in org.apache.beam.sdk.io.fs"><code>ResourceId</code></a> that references a local file or directory.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/OffsetBasedSource.html" title="class in org.apache.beam.sdk.io">OffsetBasedSource</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/BoundedSource.html" title="class in org.apache.beam.sdk.io"><code>BoundedSource</code></a> that uses offsets to define starting and ending positions.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/OffsetBasedSource.OffsetBasedReader.html" title="class in org.apache.beam.sdk.io">OffsetBasedSource.OffsetBasedReader</a>&lt;T&gt;</td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/Source.Reader.html" title="class in org.apache.beam.sdk.io"><code>Source.Reader</code></a> that implements code common to readers of all <a href="../../../../../org/apache/beam/sdk/io/OffsetBasedSource.html" title="class in org.apache.beam.sdk.io"><code>OffsetBasedSource</code></a>s.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Read.html" title="class in org.apache.beam.sdk.io">Read</a></td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> for reading from a <a href="../../../../../org/apache/beam/sdk/io/Source.html" title="class in org.apache.beam.sdk.io"><code>Source</code></a>.</div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Read.Bounded.html" title="class in org.apache.beam.sdk.io">Read.Bounded</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that reads from a <a href="../../../../../org/apache/beam/sdk/io/BoundedSource.html" title="class in org.apache.beam.sdk.io"><code>BoundedSource</code></a>.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Read.Builder.html" title="class in org.apache.beam.sdk.io">Read.Builder</a></td>
<td class="colLast">
<div class="block">Helper class for building <a href="../../../../../org/apache/beam/sdk/io/Read.html" title="class in org.apache.beam.sdk.io"><code>Read</code></a> transforms.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Read.Unbounded.html" title="class in org.apache.beam.sdk.io">Read.Unbounded</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that reads from a <a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource</code></a>.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/ReadableFileCoder.html" title="class in org.apache.beam.sdk.io">ReadableFileCoder</a></td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders"><code>Coder</code></a> for <a href="../../../../../org/apache/beam/sdk/io/FileIO.ReadableFile.html" title="class in org.apache.beam.sdk.io"><code>FileIO.ReadableFile</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/ReadAllViaFileBasedSource.html" title="class in org.apache.beam.sdk.io">ReadAllViaFileBasedSource</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">Reads each file in the input <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> of <a href="../../../../../org/apache/beam/sdk/io/FileIO.ReadableFile.html" title="class in org.apache.beam.sdk.io"><code>FileIO.ReadableFile</code></a> using given parameters
for splitting files into offset ranges and for creating a <a href="../../../../../org/apache/beam/sdk/io/FileBasedSource.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSource</code></a> for a file.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/ShardNameTemplate.html" title="class in org.apache.beam.sdk.io">ShardNameTemplate</a></td>
<td class="colLast">
<div class="block">Standard shard naming templates.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Source.html" title="class in org.apache.beam.sdk.io">Source</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">Base class for defining input formats and creating a <code>Source</code> for reading the input.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Source.Reader.html" title="class in org.apache.beam.sdk.io">Source.Reader</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">The interface that readers of custom input sources must implement.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.html" title="class in org.apache.beam.sdk.io">TextIO</a></td>
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<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a>s for reading and writing text files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.Read.html" title="class in org.apache.beam.sdk.io">TextIO.Read</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#read--"><code>TextIO.read()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.ReadAll.html" title="class in org.apache.beam.sdk.io">TextIO.ReadAll</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#readAll--"><code>TextIO.readAll()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.ReadFiles.html" title="class in org.apache.beam.sdk.io">TextIO.ReadFiles</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#readFiles--"><code>TextIO.readFiles()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.Sink.html" title="class in org.apache.beam.sdk.io">TextIO.Sink</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#sink--"><code>TextIO.sink()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.TypedWrite.html" title="class in org.apache.beam.sdk.io">TextIO.TypedWrite</a>&lt;UserT,DestinationT&gt;</td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#write--"><code>TextIO.write()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.Write.html" title="class in org.apache.beam.sdk.io">TextIO.Write</a></td>
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<div class="block">This class is used as the default return value of <a href="../../../../../org/apache/beam/sdk/io/TextIO.html#write--"><code>TextIO.write()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.html" title="class in org.apache.beam.sdk.io">TFRecordIO</a></td>
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<div class="block"><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a>s for reading and writing TensorFlow TFRecord files.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.Read.html" title="class in org.apache.beam.sdk.io">TFRecordIO.Read</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.html#read--"><code>TFRecordIO.read()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.Sink.html" title="class in org.apache.beam.sdk.io">TFRecordIO.Sink</a></td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/FileIO.Sink.html" title="interface in org.apache.beam.sdk.io"><code>FileIO.Sink</code></a> for use with <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#write--"><code>FileIO.write()</code></a> and <a href="../../../../../org/apache/beam/sdk/io/FileIO.html#writeDynamic--"><code>FileIO.writeDynamic()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.Write.html" title="class in org.apache.beam.sdk.io">TFRecordIO.Write</a></td>
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<div class="block">Implementation of <a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.html#write--"><code>TFRecordIO.write()</code></a>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.html" title="class in org.apache.beam.sdk.io">UnboundedSource</a>&lt;OutputT,CheckpointMarkT extends <a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a>&gt;</td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/beam/sdk/io/Source.html" title="class in org.apache.beam.sdk.io"><code>Source</code></a> that reads an unbounded amount of input and, because of that, supports some
additional operations such as checkpointing, watermarks, and record ids.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.NoopCheckpointMark.html" title="class in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark.NoopCheckpointMark</a></td>
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<div class="block">A checkpoint mark that does nothing when finalized.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io">UnboundedSource.UnboundedReader</a>&lt;OutputT&gt;</td>
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<div class="block">A <code>Reader</code> that reads an unbounded amount of input.</div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/WriteFiles.html" title="class in org.apache.beam.sdk.io">WriteFiles</a>&lt;UserT,DestinationT,OutputT&gt;</td>
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<div class="block">A <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that writes to a <a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.html" title="class in org.apache.beam.sdk.io"><code>FileBasedSink</code></a>.</div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/WriteFilesResult.html" title="class in org.apache.beam.sdk.io">WriteFilesResult</a>&lt;DestinationT&gt;</td>
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<div class="block">The result of a <a href="../../../../../org/apache/beam/sdk/io/WriteFiles.html" title="class in org.apache.beam.sdk.io"><code>WriteFiles</code></a> transform.</div>
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<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Enum Summary table, listing enums, and an explanation">
<caption><span>Enum Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Enum</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/CompressedSource.CompressionMode.html" title="enum in org.apache.beam.sdk.io">CompressedSource.CompressionMode</a></td>
<td class="colLast">Deprecated
<div class="block"><span class="deprecationComment">Use <a href="../../../../../org/apache/beam/sdk/io/Compression.html" title="enum in org.apache.beam.sdk.io"><code>Compression</code></a> instead</span></div>
</td>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/Compression.html" title="enum in org.apache.beam.sdk.io">Compression</a></td>
<td class="colLast">
<div class="block">Various compression types for reading/writing files.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSink.CompressionType.html" title="enum in org.apache.beam.sdk.io">FileBasedSink.CompressionType</a></td>
<td class="colLast">Deprecated
<div class="block"><span class="deprecationComment">use <a href="../../../../../org/apache/beam/sdk/io/Compression.html" title="enum in org.apache.beam.sdk.io"><code>Compression</code></a>.</span></div>
</td>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/FileBasedSource.Mode.html" title="enum in org.apache.beam.sdk.io">FileBasedSource.Mode</a></td>
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<div class="block">A given <code>FileBasedSource</code> represents a file resource of one of these types.</div>
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<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TextIO.CompressionType.html" title="enum in org.apache.beam.sdk.io">TextIO.CompressionType</a></td>
<td class="colLast">Deprecated
<div class="block"><span class="deprecationComment">Use <a href="../../../../../org/apache/beam/sdk/io/Compression.html" title="enum in org.apache.beam.sdk.io"><code>Compression</code></a>.</span></div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/beam/sdk/io/TFRecordIO.CompressionType.html" title="enum in org.apache.beam.sdk.io">TFRecordIO.CompressionType</a></td>
<td class="colLast">Deprecated
<div class="block"><span class="deprecationComment">Use <a href="../../../../../org/apache/beam/sdk/io/Compression.html" title="enum in org.apache.beam.sdk.io"><code>Compression</code></a>.</span></div>
</td>
</tr>
</tbody>
</table>
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</ul>
<a name="package.description">
<!-- -->
</a>
<h2 title="Package org.apache.beam.sdk.io Description">Package org.apache.beam.sdk.io Description</h2>
<div class="block">Defines transforms for reading and writing common storage formats, including <a href="../../../../../org/apache/beam/sdk/io/AvroIO.html" title="class in org.apache.beam.sdk.io"><code>AvroIO</code></a>, and <a href="../../../../../org/apache/beam/sdk/io/TextIO.html" title="class in org.apache.beam.sdk.io"><code>TextIO</code></a>.
<p>The classes in this package provide <code>Read</code> transforms that create PCollections from
existing storage:
<pre><code>
PCollection&lt;TableRow&gt; inputData = pipeline.apply(
BigQueryIO.readTableRows().from("clouddataflow-readonly:samples.weather_stations"));
</code></pre>
and <code>Write</code> transforms that persist PCollections to external storage:
<pre><code>
PCollection&lt;Integer&gt; numbers = ...;
numbers.apply(TextIO.write().to("gs://my_bucket/path/to/numbers"));
</code></pre></div>
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