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<h2 title="Class BlockCompressorStream" class="title">Class BlockCompressorStream</h2>
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<ul class="inheritance">
<li><a href="../../../../../org/apache/hadoop/io/compress/CompressionOutputStream.html" title="class in org.apache.hadoop.io.compress">org.apache.hadoop.io.compress.CompressionOutputStream</a></li>
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<ul class="inheritance">
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<pre>@InterfaceAudience.Public
@InterfaceStability.Evolving
public class <span class="typeNameLabel">BlockCompressorStream</span>
extends <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></pre>
<div class="block">A <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress"><code>CompressorStream</code></a> which works
with 'block-based' based compression algorithms, as opposed to
'stream-based' compression algorithms.
It should be noted that this wrapper does not guarantee that blocks will
be sized for the compressor. If the
<a href="../../../../../org/apache/hadoop/io/compress/Compressor.html" title="interface in org.apache.hadoop.io.compress"><code>Compressor</code></a> requires buffering to
effect meaningful compression, it is responsible for it.</div>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.io.compress.<a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></h3>
<code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#buffer">buffer</a>, <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#closed">closed</a>, <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#compressor">compressor</a></code></li>
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<code><a href="../../../../../org/apache/hadoop/io/compress/CompressionOutputStream.html#out">out</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html#BlockCompressorStream-java.io.OutputStream-org.apache.hadoop.io.compress.Compressor-">BlockCompressorStream</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
<a href="../../../../../org/apache/hadoop/io/compress/Compressor.html" title="interface in org.apache.hadoop.io.compress">Compressor</a>&nbsp;compressor)</code>
<div class="block">Create a <a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html" title="class in org.apache.hadoop.io.compress"><code>BlockCompressorStream</code></a> with given output-stream and
compressor.</div>
</td>
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<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html#BlockCompressorStream-java.io.OutputStream-org.apache.hadoop.io.compress.Compressor-int-int-">BlockCompressorStream</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
<a href="../../../../../org/apache/hadoop/io/compress/Compressor.html" title="interface in org.apache.hadoop.io.compress">Compressor</a>&nbsp;compressor,
int&nbsp;bufferSize,
int&nbsp;compressionOverhead)</code>
<div class="block">Create a <a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html" title="class in org.apache.hadoop.io.compress"><code>BlockCompressorStream</code></a>.</div>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html#compress--">compress</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html#finish--">finish</a></span>()</code>
<div class="block">Finishes writing compressed data to the output stream
without closing the underlying stream.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html#write-byte:A-int-int-">write</a></span>(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)</code>
<div class="block">Write the data provided to the compression codec, compressing no more
than the buffer size less the compression overhead as specified during
construction for each block.</div>
</td>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.io.compress.<a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></h3>
<code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#close--">close</a>, <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#resetState--">resetState</a>, <a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#write-int-">write</a></code></li>
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<code><a href="../../../../../org/apache/hadoop/io/compress/CompressionOutputStream.html#flush--">flush</a>, <a href="../../../../../org/apache/hadoop/io/compress/CompressionOutputStream.html#getIOStatistics--">getIOStatistics</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true#write-byte:A-" title="class or interface in java.io">write</a></code></li>
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<h4>BlockCompressorStream</h4>
<pre>public&nbsp;BlockCompressorStream(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
<a href="../../../../../org/apache/hadoop/io/compress/Compressor.html" title="interface in org.apache.hadoop.io.compress">Compressor</a>&nbsp;compressor,
int&nbsp;bufferSize,
int&nbsp;compressionOverhead)</pre>
<div class="block">Create a <a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html" title="class in org.apache.hadoop.io.compress"><code>BlockCompressorStream</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - stream</dd>
<dd><code>compressor</code> - compressor to be used</dd>
<dd><code>bufferSize</code> - size of buffer</dd>
<dd><code>compressionOverhead</code> - maximum 'overhead' of the compression
algorithm with given bufferSize</dd>
</dl>
</li>
</ul>
<a name="BlockCompressorStream-java.io.OutputStream-org.apache.hadoop.io.compress.Compressor-">
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<h4>BlockCompressorStream</h4>
<pre>public&nbsp;BlockCompressorStream(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
<a href="../../../../../org/apache/hadoop/io/compress/Compressor.html" title="interface in org.apache.hadoop.io.compress">Compressor</a>&nbsp;compressor)</pre>
<div class="block">Create a <a href="../../../../../org/apache/hadoop/io/compress/BlockCompressorStream.html" title="class in org.apache.hadoop.io.compress"><code>BlockCompressorStream</code></a> with given output-stream and
compressor.
Use default of 512 as bufferSize and compressionOverhead of
(1% of bufferSize + 12 bytes) = 18 bytes (zlib algorithm).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - stream</dd>
<dd><code>compressor</code> - compressor to be used</dd>
</dl>
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<h4>write</h4>
<pre>public&nbsp;void&nbsp;write(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)
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">Write the data provided to the compression codec, compressing no more
than the buffer size less the compression overhead as specified during
construction for each block.
Each block contains the uncompressed length for the block, followed by
one or more length-prefixed blocks of compressed data.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#write-byte:A-int-int-">write</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></code></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>
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<h4>finish</h4>
<pre>public&nbsp;void&nbsp;finish()
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"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/hadoop/io/compress/CompressionOutputStream.html#finish--">CompressionOutputStream</a></code></span></div>
<div class="block">Finishes writing compressed data to the output stream
without closing the underlying stream.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#finish--">finish</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></code></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>
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<h4>compress</h4>
<pre>protected&nbsp;void&nbsp;compress()
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>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html#compress--">compress</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/io/compress/CompressorStream.html" title="class in org.apache.hadoop.io.compress">CompressorStream</a></code></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>
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