jonas.rehn
/
praktikum-holons
forked from carlos.garcia/praktikum-holons


			
				
					
						
						
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<h1 title="Package" class="title">Package&nbsp;org.apache.commons.compress.archivers.dump</h1>
<div class="docSummary">
<div class="block">This package provides stream classes for reading archives
      using the Unix DUMP format.</div>
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<p>See:&nbsp;<a href="#package_description">Description</a></p>
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<th class="colFirst" scope="col">Class</th>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveConstants.html" title="class in org.apache.commons.compress.archivers.dump">DumpArchiveConstants</a></td>
<td class="colLast">
<div class="block">Various constants associated with dump archives.</div>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveEntry.html" title="class in org.apache.commons.compress.archivers.dump">DumpArchiveEntry</a></td>
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<div class="block">This class represents an entry in a Dump archive.</div>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveInputStream.html" title="class in org.apache.commons.compress.archivers.dump">DumpArchiveInputStream</a></td>
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<div class="block">The DumpArchiveInputStream reads a UNIX dump archive as an InputStream.</div>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveSummary.html" title="class in org.apache.commons.compress.archivers.dump">DumpArchiveSummary</a></td>
<td class="colLast">
<div class="block">This class represents identifying information about a Dump archive volume.</div>
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<th class="colFirst" scope="col">Enum</th>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveConstants.COMPRESSION_TYPE.html" title="enum in org.apache.commons.compress.archivers.dump">DumpArchiveConstants.COMPRESSION_TYPE</a></td>
<td class="colLast">
<div class="block">The type of compression.</div>
</td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveConstants.SEGMENT_TYPE.html" title="enum in org.apache.commons.compress.archivers.dump">DumpArchiveConstants.SEGMENT_TYPE</a></td>
<td class="colLast">
<div class="block">The type of tape segment.</div>
</td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveEntry.PERMISSION.html" title="enum in org.apache.commons.compress.archivers.dump">DumpArchiveEntry.PERMISSION</a></td>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveEntry.TYPE.html" title="enum in org.apache.commons.compress.archivers.dump">DumpArchiveEntry.TYPE</a></td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/DumpArchiveException.html" title="class in org.apache.commons.compress.archivers.dump">DumpArchiveException</a></td>
<td class="colLast">
<div class="block">Dump Archive Exception</div>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/InvalidFormatException.html" title="class in org.apache.commons.compress.archivers.dump">InvalidFormatException</a></td>
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<div class="block">Invalid Format Exception.</div>
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<div class="block">Short File Exception.</div>
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<div class="block">Unrecognized Format Exception.</div>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/compress/archivers/dump/UnsupportedCompressionAlgorithmException.html" title="class in org.apache.commons.compress.archivers.dump">UnsupportedCompressionAlgorithmException</a></td>
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<div class="block">Unsupported compression algorithm.</div>
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<h2 title="Package org.apache.commons.compress.archivers.dump Description">Package org.apache.commons.compress.archivers.dump Description</h2>
<div class="block"><p>This package provides stream classes for reading archives
      using the Unix DUMP format. This format is similar to (and 
      contemporary with) TAR but reads the raw filesystem directly.
      This means that writers are filesystem-specific even though the
      created archives are filesystem-agnostic.
      </p>
     
    <p>Unlike other formats DUMP offers clean support for sparse files,
      extended attributes, and other file metadata. In addition DUMP 
      supports incremental dump files can capture (most) file deletion.
      It also provides a native form of compression and will soon support
      native encryption as well.
      </p>

    <p>In practice TAR archives are used for both distribution
      and backups. DUMP archives are used exclusively for backups.
      </p>

    <p>Like any 30+-year-old application there are a number of variants.
      For pragmatic reasons we will only support archives with the
      'new' tape header and inode formats. Other restrictions:

      <ul>
      <li>We only support ZLIB compression. The format
        also permits LZO and BZLIB compression.</li>
      <li>Sparse files will have the holes filled.</li>
      <li>MacOS finder and resource streams are ignored.</li>
      <li>Extended attributes are not currently provided.</li>
      <li>SELinux labels are not currently provided.</li>
      </ul>
    </p>

    <p>As of Apache Commons Compress 1.3 support for the dump format is
      read-only.</p></div>
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