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<div class="subTitle">org.apache.commons.compress.compressors.xz</div>
<h2 title="Class XZUtils" class="title">Class XZUtils</h2>
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<pre>public class <a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.30">XZUtils</a>
extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Utility code for the xz compression format.</div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>1.4</dd>
<dt><span class="strong">This class is thread-safe</span></dt>
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#getCompressedFilename(java.lang.String)">getCompressedFilename</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</code>
<div class="block">Maps the given filename to the name that the file should have after
 compression with xz.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#getUncompressedFilename(java.lang.String)">getUncompressedFilename</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</code>
<div class="block">Maps the given name of a xz-compressed file to the name that the
 file should have after uncompression.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#isCompressedFilename(java.lang.String)">isCompressedFilename</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</code>
<div class="block">Detects common xz suffixes in the given filename.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#isXZCompressionAvailable()">isXZCompressionAvailable</a></strong>()</code>
<div class="block">Are the classes required to support XZ compression available?</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#matches(byte[],%20int)">matches</a></strong>(byte[]&nbsp;signature,
              int&nbsp;length)</code>
<div class="block">Checks if the signature matches what is expected for a .xz file.</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/xz/XZUtils.html#setCacheXZAvailablity(boolean)">setCacheXZAvailablity</a></strong>(boolean&nbsp;doCache)</code>
<div class="block">Whether to cache the result of the XZ for Java check.</div>
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<h4>matches</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.80">matches</a>(byte[]&nbsp;signature,
              int&nbsp;length)</pre>
<div class="block">Checks if the signature matches what is expected for a .xz file.

 <p>This is more or less a copy of the version found in <a href="../../../../../../org/apache/commons/compress/compressors/xz/XZCompressorInputStream.html" title="class in org.apache.commons.compress.compressors.xz"><code>XZCompressorInputStream</code></a> but doesn't depend on the presence of
 XZ for Java.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>signature</code> - the bytes to check</dd><dd><code>length</code> - the number of bytes to check</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if signature matches the .xz magic bytes, false otherwise</dd><dt><span class="strong">Since:</span></dt>
  <dd>1.9</dd></dl>
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<h4>isXZCompressionAvailable</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.99">isXZCompressionAvailable</a>()</pre>
<div class="block">Are the classes required to support XZ compression available?</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if the classes required to support XZ compression are available</dd><dt><span class="strong">Since:</span></dt>
  <dd>1.5</dd></dl>
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<h4>isCompressedFilename</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.123">isCompressedFilename</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</pre>
<div class="block">Detects common xz suffixes in the given filename.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>filename</code> - name of a file</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the filename has a common xz suffix,
         <code>false</code> otherwise</dd></dl>
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<h4>getUncompressedFilename</h4>
<pre>public static&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.140">getUncompressedFilename</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</pre>
<div class="block">Maps the given name of a xz-compressed file to the name that the
 file should have after uncompression. Commonly used file type specific
 suffixes like ".txz" are automatically detected and
 correctly mapped. For example the name "package.txz" is mapped to
 "package.tar". And any filenames with the generic ".xz" suffix
 (or any other generic xz suffix) is mapped to a name without that
 suffix. If no xz suffix is detected, then the filename is returned
 unmapped.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>filename</code> - name of a file</dd>
<dt><span class="strong">Returns:</span></dt><dd>name of the corresponding uncompressed file</dd></dl>
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<h4>getCompressedFilename</h4>
<pre>public static&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.155">getCompressedFilename</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;filename)</pre>
<div class="block">Maps the given filename to the name that the file should have after
 compression with xz. Common file types with custom suffixes for
 compressed versions are automatically detected and correctly mapped.
 For example the name "package.tar" is mapped to "package.txz". If no
 custom mapping is applicable, then the default ".xz" suffix is appended
 to the filename.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>filename</code> - name of a file</dd>
<dt><span class="strong">Returns:</span></dt><dd>name of the corresponding compressed file</dd></dl>
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<h4>setCacheXZAvailablity</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/xz/XZUtils.html#line.166">setCacheXZAvailablity</a>(boolean&nbsp;doCache)</pre>
<div class="block">Whether to cache the result of the XZ for Java check.

 <p>This defaults to <code>false</code> in an OSGi environment and <code>true</code> otherwise.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>doCache</code> - whether to cache the result</dd><dt><span class="strong">Since:</span></dt>
  <dd>1.9</dd></dl>
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