mirror of https://github.com/apache/poi.git
1267 lines
37 KiB
HTML
1267 lines
37 KiB
HTML
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<td valign="top" align="left"><a href="http://jakarta.apache.org/index.html"><img hspace="0" vspace="0" border="0" src="images/jakarta-logo.gif"></a></td><td width="100%" valign="top" align="left" bgcolor="#ffffff"><img hspace="0" vspace="0" border="0" align="right" src="images/header.gif"></td>
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<td colspan="2" bgcolor="#525d76"><span class="c1"><a class="black" href="http://www.apache.org/">www.apache.org ></a><a class="black" href="http://jakarta.apache.org/">jakarta.apache.org ></a><a href="http://jakarta.apache.org/poi/" class="black">jakarta.apache.org/poi</a></span></td>
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</table>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr>
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<td width="1%">
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<br>
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</td><td nowrap="1" valign="top" width="14%">
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<span class="s1">Navigation</span>
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<a class="s1" href="../index.html">Main</a>
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<a class="s1" href="how-to.html">How To</a>
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<br>
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<a class="s1" href="fileformat.html">File System Documentation</a>
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<br>
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<a class="s1" href="usecases.html">Use Cases</a>
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<br>
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</td><td width="1%">
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<br>
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</td><td align="left" valign="top" width="*"><font size="-2" color="#000000">
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<p>
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<a href="mailto:"></a>
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</p>
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</font>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="100%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>POIFS Use Cases</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="99%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 1: Read existing file system</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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<table width="100%" cellspacing="2" cellpadding="2" border="0">
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>POIFS client- wants to read content of file
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system</li>
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<li>POIFS - understands POIFS file system</li>
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</ul>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ol>
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<li>POIFS client requests POIFS to read a POIFS file
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system, providing an <code>InputStream</code>
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containing POIFS file system in question.</li>
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<li>POIFS reads from the <code>InputStream</code> in
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512 byte blocks</li>
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<li>POIFS verifies that the first block begins with
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the well known signature
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(<code>0xE11AB1A1E011CFD0</code>)</li>
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<li>POIFS reads the Block Allocation Table from the
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first block and, if necessary, from the XBAT
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blocks.</li>
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<li>POIFS obtains the start block of the Property
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Table and reads the Property Table (use case 9,
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read file)</li>
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<li>POIFS reads the individual entries in the Property
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Table</li>
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<li>POIFS obtains the start block of the Small Block
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Allocation Table and reads the Small Block
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Allocation Table (use case 9, read file)</li>
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<li>POIFS obtains the start block of the Small Block
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store from the first entry in the Property Table
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and reads the Small Block Array (use case 9, read
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file)</li>
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</ol>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>2a. If the last block read is not a 512 byte
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block, the <code>InputStream</code> is not that of
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a POIFS file system, and POIFS throws an
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appropriate exception.</li>
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<li>3a. If the signature is incorrect, the
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<code>InputStream</code> is not that of a POIFS
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file system, and POIFS throws an appropriate
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exception.</li>
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</ul>
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</font></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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</div>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="99%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 2: Write file system</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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<table width="100%" cellspacing="2" cellpadding="2" border="0">
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>POIFS client- wants to write file system out.</li>
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<li>POIFS - knows how to write file system out.</li>
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</ul>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>File system has been read (use case 1, read
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existing file system) and subsequently modified
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(use case 4, replace file in file system; use case
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5, delete file from file system; or use case 6,
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write new file to file system; in any
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combination)</li>
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</ul>
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<p align="justify">or</p>
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<ul>
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<li>File system has been created (use case 3, create
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new file system)</li>
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</ul>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ol>
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<li>POIFS client provides an <code>OutputStream</code>
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to write the file system to.</li>
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<li>POIFS gets the sizes of the Property Table and
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each file in the file system.</li>
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<li>If any files in the file system requires storage
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in a Small Block Array, POIFS creates a Small
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Block Array of sufficient size to hold all of the
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small files.</li>
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<li>POIFS calculates the number of big blocks needed
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to hold all of the large files, the Property
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Table, and, if necessary, the Small Block Array
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and the Small Block Allocation Table.</li>
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<li>POIFS creates a set of big blocks sufficient to
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store the Block Allocation Table</li>
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<li>POIFS creates and writes the header block</li>
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<li>POIFS writes out the XBAT blocks, if needed.</li>
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<li>POIFS writes out the Small Block Array, if
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needed</li>
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<li>POIFS writes out the Small Block Allocation Table,
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if needed</li>
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<li>POIFS writes out the Property Table</li>
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<li>POIFS writes out the large files, if needed</li>
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<li>POIFS closes the <code>OutputStream</code>.</li>
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</ol>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>6a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>7a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>8a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>9a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>10a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>11a. Exceptions writing to the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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<li>12a. Exceptions closing the
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<code>OutputStream</code> will be propagated back
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to the POIFS client.</li>
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</ul>
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</font></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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</div>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="99%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 3: Create new file system</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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<table width="100%" cellspacing="2" cellpadding="2" border="0">
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ul>
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<li>POIFS client- wants to create a new file
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system</li>
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<li>POIFS - knows how to create a new file system</li>
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</ul>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
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<ol>
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<li>POIFS creates an empty Property Table.</li>
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</ol>
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</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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</div>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="99%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 4: Replace file in file system</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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<table width="100%" cellspacing="2" cellpadding="2" border="0">
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
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</tr>
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
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</tr>
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<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to replace an existing file in
|
|
the file system</li>
|
|
|
|
<li>POIFS - knows how to manage the file system</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<p align="justify">Either</p>
|
|
|
|
<ul>
|
|
|
|
<li>The file system has been read (use case 1, read
|
|
existing file system) and a file has been
|
|
extracted from the file system (use case 7, read
|
|
existing file from file system)</li>
|
|
|
|
</ul>
|
|
|
|
<p align="justify">or</p>
|
|
|
|
<ul>
|
|
|
|
<li>The file system has been created (use case 3,
|
|
create new file system) and a file has been
|
|
written to the file system (use case 6, write new
|
|
file to file system)</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>POIFS discards storage of the existing file.</li>
|
|
|
|
<li>POIFS updates the existing file's entry in the
|
|
Property Table</li>
|
|
|
|
<li>POIFS stores the new file's data</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>1a. POIFS throws an exception if the file does not
|
|
exist.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
<div align="right">
|
|
<table cellspacing="0" cellpadding="2" border="0" width="99%">
|
|
<tr>
|
|
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 5: Delete file from file system</b></font></font></td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<br>
|
|
|
|
<table width="100%" cellspacing="2" cellpadding="2" border="0">
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to remove a file from a file
|
|
system</li>
|
|
|
|
<li>POIFS - knows how to manage the file system</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<p align="justify">Either</p>
|
|
|
|
<ul>
|
|
|
|
<li>The file system has been read (use case 1, read
|
|
existing file system) and a file has been
|
|
extracted from the file system (use case 7, read
|
|
existing file from file system)</li>
|
|
|
|
</ul>
|
|
|
|
<p align="justify">or</p>
|
|
|
|
<ul>
|
|
|
|
<li>The file system has been created (use case 3,
|
|
create new file system) and a file has been
|
|
written to the file system (use case 6, write new
|
|
file to file system)</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>POIFS discards the specified file's storage.</li>
|
|
|
|
<li>POIFS discards the file's Property Table
|
|
entry.</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>1a. POIFS throws an exception if the file does not
|
|
exist.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
<div align="right">
|
|
<table cellspacing="0" cellpadding="2" border="0" width="99%">
|
|
<tr>
|
|
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 6: Write new file to file system</b></font></font></td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<br>
|
|
|
|
<table width="100%" cellspacing="2" cellpadding="2" border="0">
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to add a new file to the file
|
|
system</li>
|
|
|
|
<li>POIFS - knows how to manage the file system</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">The specified file does not yet exist in the file
|
|
system</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>The POIFS client provides a file name</li>
|
|
|
|
<li>POIFS creates a new Property Table entry for the
|
|
new file</li>
|
|
|
|
<li>POIFS provides the POIFS client with an
|
|
<code>OutputStream</code> to write to.</li>
|
|
|
|
<li>The POIFS client writes data to the provided
|
|
<code>OutputStream</code>.</li>
|
|
|
|
<li>The POIFS client closes the provided
|
|
<code>OutputStream</code>
|
|
</li>
|
|
|
|
<li>POIFS updates the Property Table entry with the
|
|
new file's size</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>1a. POIFS throws an exception if a file with the
|
|
specified name already exists in the file
|
|
system.</li>
|
|
|
|
<li>1b. POIFS throws an exception if the file name is
|
|
too long. The limit on file name length is 31
|
|
characters.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
<div align="right">
|
|
<table cellspacing="0" cellpadding="2" border="0" width="99%">
|
|
<tr>
|
|
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 7: Read existing file from file system</b></font></font></td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<br>
|
|
|
|
<table width="100%" cellspacing="2" cellpadding="2" border="0">
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to read a file from the file
|
|
system</li>
|
|
|
|
<li>POIFS - knows how to manage the file system</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>The file system has been read (use case 1, read
|
|
existing file system) or has been created and
|
|
written to (use case 3, create new file system;
|
|
use case 6, write new file to file system).</li>
|
|
|
|
<li>The specified file exists in the file system.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>The POIFS client provides the name of a file to be
|
|
read</li>
|
|
|
|
<li>POIFS provides an <code>InputStream</code> to read
|
|
from.</li>
|
|
|
|
<li>The POIFS client reads from the
|
|
<code>InputStream</code>.</li>
|
|
|
|
<li>The POIFS client closes the
|
|
<code>InputStream</code>.</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">1a. POIFS throws an exception if no file with the
|
|
specified name exists.</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
<div align="right">
|
|
<table cellspacing="0" cellpadding="2" border="0" width="99%">
|
|
<tr>
|
|
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 8: Read file system directory</b></font></font></td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<br>
|
|
|
|
<table width="100%" cellspacing="2" cellpadding="2" border="0">
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to know what files exist in
|
|
the file system</li>
|
|
|
|
<li>POIFS - knows how to manage the file system</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">The file system has been read (use case 1, read
|
|
existing file system) or created (use case 3, create
|
|
new file system)</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>The POIFS client requests the file system
|
|
directory.</li>
|
|
|
|
<li>POIFS returns an <code>Iterator</code>. The
|
|
<code>Iterator</code> will not include the root
|
|
entry in the Property Table, and may be an
|
|
<code>Iterator</code> over an empty
|
|
<code>Collection</code>.</li>
|
|
|
|
</ol>
|
|
|
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</font></td>
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</tr>
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<tr>
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|
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
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|
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</tr>
|
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</table>
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</td>
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</tr>
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</table>
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</div>
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<br>
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<div align="right">
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<table cellspacing="0" cellpadding="2" border="0" width="99%">
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<tr>
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<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 9: Read file</b></font></font></td>
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</tr>
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<tr>
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<td>
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<br>
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|
|
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<table width="100%" cellspacing="2" cellpadding="2" border="0">
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<tr>
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
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<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
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<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS - POIFS needs to read a file, or something
|
|
resembling a file (i.e., the Property Table, the
|
|
Small Block Array, or the Small Block Allocation
|
|
Table)</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>POIFS begins with a start block, a file size, and
|
|
a flag indicating whether to use the Big Block
|
|
Allocation Table or the Small Block Allocation
|
|
Table</li>
|
|
|
|
<li>POIFS returns an <code>InputStream</code>.</li>
|
|
|
|
<li>Reads from the <code>InputStream</code> are
|
|
performed by walking the specified Block
|
|
Allocation Table and reading the blocks
|
|
indicated.</li>
|
|
|
|
<li>POIFS closes the <code>InputStream</code> when
|
|
finished reading the file, or its client wants to
|
|
close the <code>InputStream</code>.</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">3a. An exception will be thrown if the specified Block
|
|
Allocation Table is corrupt, as evidenced by an index
|
|
pointing to a non-existent block, or by a chain
|
|
extending past the known size of the file.</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
<div align="right">
|
|
<table cellspacing="0" cellpadding="2" border="0" width="99%">
|
|
<tr>
|
|
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Use Case 10: Rename existing file in the file system</b></font></font></td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<br>
|
|
|
|
<table width="100%" cellspacing="2" cellpadding="2" border="0">
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Primary Actor:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS client</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Scope:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">POIFS</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Level:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">Summary</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Stakeholders and Interests:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>POIFS client- wants to rename an existing file in
|
|
the file system.</li>
|
|
|
|
<li>POIFS - knows how to manage the file system.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Precondition:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>The file system is has been read (use case 1, read
|
|
existing file system) or has been created and
|
|
written to (use case 3, create new file system;
|
|
use case 6, write new file to file system.</li>
|
|
|
|
<li>The specified file exists in the file system.</li>
|
|
|
|
<li>The new name for the file does not duplicate
|
|
another file in the file system.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Minimal Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">None</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Main Success Guarantee:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ol>
|
|
|
|
<li>POIFS updates the Property Table entry for the
|
|
specified file with its new name.</li>
|
|
|
|
</ol>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
<tr>
|
|
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000"><B>Extensions:</B></font></td>
|
|
<td valign="top" bgcolor="#a0ddf0" align="left"><font size="-1" color="#000000">
|
|
|
|
<ul>
|
|
|
|
<li>1a. If the old file name is not in the file
|
|
system, POIFS throws an exception.</li>
|
|
|
|
<li>1b. If the new file name already exists in the
|
|
file system, POIFS throws an exception.</li>
|
|
|
|
<li>1c. If the new file name is too long (the limit is
|
|
31 characters), POIFS throws an exception.</li>
|
|
|
|
</ul>
|
|
|
|
</font></td>
|
|
|
|
</tr>
|
|
</table>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<br>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<br>
|
|
<table width="100%" border="0" cellspacing="0" cellpadding="0">
|
|
<tbody>
|
|
<tr>
|
|
<td>
|
|
<hr noshade="" size="1">
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td align="center"><i>Copyright © 2002 Apache Software Foundation</i></td>
|
|
</tr>
|
|
<tr>
|
|
<td align="right" width="100%">
|
|
<br>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td align="right" width="100%"><a href="http://krysalis.org/"><img alt="Krysalis Logo" src="images/krysalis-compatible.jpg"></a><a href="http://xml.apache.org/cocoon/"><img alt="Cocoon Logo" src="images/built-with-cocoon.gif"></a></td>
|
|
</tr>
|
|
</tbody>
|
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</table>
|
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</body>
|
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</html>
|