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<h2 title="Class LZMA2InputStream" class="title">Class LZMA2InputStream</h2>
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<li><a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<li><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">java.io.InputStream</a></li>
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<li>org.tukaani.xz.LZMA2InputStream</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></dd>
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<pre>public class <span class="strong">LZMA2InputStream</span>
extends <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></pre>
<div class="block">Decompresses a raw LZMA2 stream (no XZ headers).</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#DICT_SIZE_MAX">DICT_SIZE_MAX</a></strong></code>
<div class="block">Largest dictionary size supported by this implementation.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#DICT_SIZE_MIN">DICT_SIZE_MIN</a></strong></code>
<div class="block">Smallest valid LZMA2 dictionary size.</div>
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<td class="colOne"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#LZMA2InputStream(java.io.InputStream, int)">LZMA2InputStream</a></strong>(<a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> in,
int dictSize)</code>
<div class="block">Creates a new input stream that decompresses raw LZMA2 data
from <code>in</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#LZMA2InputStream(java.io.InputStream, int, byte[])">LZMA2InputStream</a></strong>(<a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> in,
int dictSize,
byte[] presetDict)</code>
<div class="block">Creates a new LZMA2 decompressor using a preset dictionary.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#available()">available</a></strong>()</code>
<div class="block">Returns the number of uncompressed bytes that can be read
without blocking.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#close()">close</a></strong>()</code>
<div class="block">Closes the stream and calls <code>in.close()</code>.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#getMemoryUsage(int)">getMemoryUsage</a></strong>(int dictSize)</code>
<div class="block">Gets approximate decompressor memory requirements as kibibytes for
the given dictionary size.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#read()">read</a></strong>()</code>
<div class="block">Decompresses the next byte from this input stream.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../org/tukaani/xz/LZMA2InputStream.html#read(byte[], int, int)">read</a></strong>(byte[] buf,
int off,
int len)</code>
<div class="block">Decompresses into an array of bytes.</div>
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<h3>Methods inherited from class java.io.<a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></h3>
<code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#mark(int)" title="class or interface in java.io">mark</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#markSupported()" title="class or interface in java.io">markSupported</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#read(byte[])" title="class or interface in java.io">read</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#reset()" title="class or interface in java.io">reset</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#skip(long)" title="class or interface in java.io">skip</a></code></li>
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<h3>Methods inherited from class java.lang.<a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="file:///usr/share/doc/default-jdk-doc/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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<h4>DICT_SIZE_MIN</h4>
<pre>public static final int DICT_SIZE_MIN</pre>
<div class="block">Smallest valid LZMA2 dictionary size.
<p>
Very tiny dictionaries would be a performance problem, so
the minimum is 4 KiB.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.tukaani.xz.LZMA2InputStream.DICT_SIZE_MIN">Constant Field Values</a></dd></dl>
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<pre>public static final int DICT_SIZE_MAX</pre>
<div class="block">Largest dictionary size supported by this implementation.
<p>
The LZMA2 algorithm allows dictionaries up to one byte less than 4 GiB.
This implementation supports only 16 bytes less than 2 GiB for raw
LZMA2 streams, and for .xz files the maximum is 1.5 GiB. This
limitation is due to Java using signed 32-bit integers for array
indexing. The limitation shouldn't matter much in practice since so
huge dictionaries are not normally used.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.tukaani.xz.LZMA2InputStream.DICT_SIZE_MAX">Constant Field Values</a></dd></dl>
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<h4>LZMA2InputStream</h4>
<pre>public LZMA2InputStream(<a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> in,
int dictSize)</pre>
<div class="block">Creates a new input stream that decompresses raw LZMA2 data
from <code>in</code>.
<p>
The caller needs to know the dictionary size used when compressing;
the dictionary size isn't stored as part of a raw LZMA2 stream.
<p>
Specifying a too small dictionary size will prevent decompressing
the stream. Specifying a too big dictionary is waste of memory but
decompression will work.
<p>
There is no need to specify a dictionary bigger than
the uncompressed size of the data even if a bigger dictionary
was used when compressing. If you know the uncompressed size
of the data, this might allow saving some memory.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>in</code> - input stream from which LZMA2-compressed
data is read</dd><dd><code>dictSize</code> - LZMA2 dictionary size as bytes, must be
in the range [<code>DICT_SIZE_MIN</code>,
<code>DICT_SIZE_MAX</code>]</dd></dl>
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<h4>LZMA2InputStream</h4>
<pre>public LZMA2InputStream(<a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> in,
int dictSize,
byte[] presetDict)</pre>
<div class="block">Creates a new LZMA2 decompressor using a preset dictionary.
<p>
This is like <code>LZMA2InputStream(InputStream, int)</code> except
that the dictionary may be initialized using a preset dictionary.
If a preset dictionary was used when compressing the data, the
same preset dictionary must be provided when decompressing.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>in</code> - input stream from which LZMA2-compressed
data is read</dd><dd><code>dictSize</code> - LZMA2 dictionary size as bytes, must be
in the range [<code>DICT_SIZE_MIN</code>,
<code>DICT_SIZE_MAX</code>]</dd><dd><code>presetDict</code> - preset dictionary or <code>null</code>
to use no preset dictionary</dd></dl>
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<a name="getMemoryUsage(int)">
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<h4>getMemoryUsage</h4>
<pre>public static int getMemoryUsage(int dictSize)</pre>
<div class="block">Gets approximate decompressor memory requirements as kibibytes for
the given dictionary size.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dictSize</code> - LZMA2 dictionary size as bytes, must be
in the range [<code>DICT_SIZE_MIN</code>,
<code>DICT_SIZE_MAX</code>]</dd>
<dt><span class="strong">Returns:</span></dt><dd>approximate memory requirements as kibibytes (KiB)</dd></dl>
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<h4>read</h4>
<pre>public int read()
throws <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Decompresses the next byte from this input stream.
<p>
Reading lots of data with <code>read()</code> from this input stream
may be inefficient. Wrap it in <code>java.io.BufferedInputStream</code>
if you need to read lots of data one byte at a time.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#read()" title="class or interface in java.io">read</a></code> in class <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the next decompressed byte, or <code>-1</code>
to indicate the end of the compressed stream</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/tukaani/xz/CorruptedInputException.html" title="class in org.tukaani.xz">CorruptedInputException</a></code></dd>
<dd><code><a href="../../../org/tukaani/xz/XZIOException.html" title="class in org.tukaani.xz">XZIOException</a></code> - if the stream has been closed</dd>
<dd><code>EOFException</code> - compressed input is truncated or corrupt</dd>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - may be thrown by <code>in</code></dd></dl>
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<pre>public int read(byte[] buf,
int off,
int len)
throws <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Decompresses into an array of bytes.
<p>
If <code>len</code> is zero, no bytes are read and <code>0</code>
is returned. Otherwise this will block until <code>len</code>
bytes have been decompressed, the end of the LZMA2 stream is reached,
or an exception is thrown.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#read(byte[], int, int)" title="class or interface in java.io">read</a></code> in class <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>buf</code> - target buffer for uncompressed data</dd><dd><code>off</code> - start offset in <code>buf</code></dd><dd><code>len</code> - maximum number of uncompressed bytes to read</dd>
<dt><span class="strong">Returns:</span></dt><dd>number of bytes read, or <code>-1</code> to indicate
the end of the compressed stream</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../org/tukaani/xz/CorruptedInputException.html" title="class in org.tukaani.xz">CorruptedInputException</a></code></dd>
<dd><code><a href="../../../org/tukaani/xz/XZIOException.html" title="class in org.tukaani.xz">XZIOException</a></code> - if the stream has been closed</dd>
<dd><code>EOFException</code> - compressed input is truncated or corrupt</dd>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - may be thrown by <code>in</code></dd></dl>
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<h4>available</h4>
<pre>public int available()
throws <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns the number of uncompressed bytes that can be read
without blocking. The value is returned with an assumption
that the compressed input data will be valid. If the compressed
data is corrupt, <code>CorruptedInputException</code> may get
thrown before the number of bytes claimed to be available have
been read from this input stream.
<p>
In LZMA2InputStream, the return value will be non-zero when the
decompressor is in the middle of an LZMA2 chunk. The return value
will then be the number of uncompressed bytes remaining from that
chunk.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#available()" title="class or interface in java.io">available</a></code> in class <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of uncompressed bytes that can be read
without blocking</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
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<h4>close</h4>
<pre>public void close()
throws <a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Closes the stream and calls <code>in.close()</code>.
If the stream was already closed, this does nothing.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/Closeable.html?is-external=true#close()" title="class or interface in java.io">close</a></code> in interface <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/AutoCloseable.html?is-external=true#close()" title="class or interface in java.lang">close</a></code> in interface <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true#close()" title="class or interface in java.io">close</a></code> in class <code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="file:///usr/share/doc/default-jdk-doc/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if thrown by <code>in.close()</code></dd></dl>
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