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<div class="subTitle">uk.ac.starlink.votable</div>
<h2 title="Class VOTableFitsTableWriter" class="title">Class VOTableFitsTableWriter</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<ul class="inheritance">
<li>uk.ac.starlink.table.StreamStarTableWriter</li>
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<ul class="inheritance">
<li>uk.ac.starlink.fits.AbstractFitsTableWriter</li>
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<ul class="inheritance">
<li>uk.ac.starlink.votable.VOTableFitsTableWriter</li>
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<dt>All Implemented Interfaces:</dt>
<dd>uk.ac.starlink.table.MultiStarTableWriter, uk.ac.starlink.table.StarTableWriter</dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../uk/ac/starlink/votable/ColFitsPlusTableWriter.html" title="class in uk.ac.starlink.votable">ColFitsPlusTableWriter</a>, <a href="../../../../uk/ac/starlink/votable/FitsPlusTableWriter.html" title="class in uk.ac.starlink.votable">FitsPlusTableWriter</a></dd>
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<pre>public abstract class <span class="typeNameLabel">VOTableFitsTableWriter</span>
extends uk.ac.starlink.fits.AbstractFitsTableWriter</pre>
<div class="block">TableWriter which writes table data into the first extension of a FITS file,
Unlike <code>FitsTableWriter</code> however, the
primary extension is not left contentless, instead it gets the
text of a DATA-less VOTable written into it. This VOTable describes
the metadata of the table.
Tables stored using this (non-standard) mechanism have all the rich
metadata associated with VOTables, and benefit from the compactness
of FITS tables, withouth the considerable disadvantage of being split
into two files.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>26 Aug 2004</dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Mark Taylor (Starlink)</dd>
</dl>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#VOTableFitsTableWriter-java.lang.String-">VOTableFitsTableWriter</a></span>(java.lang.String formatName)</code>
<div class="block">Constructor.</div>
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<td class="colFirst"><code>protected abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#customisePrimaryHeader-nom.tam.fits.Header-">customisePrimaryHeader</a></span>(nom.tam.fits.Header hdr)</code>
<div class="block">Hook for adding custom entries to the FITS header which is written
to the primary HDU.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#isMagic-byte:A-">isMagic</a></span>(byte[] buffer)</code>
<div class="block">Determines whether a given byte buffer looks like it contains
the start of a primary header written by this writer.</div>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#isMagic-int-java.lang.String-java.lang.String-">isMagic</a></span>(int icard,
java.lang.String key,
java.lang.String value)</code>
<div class="block">Tests a header card to see if it looks like part of the magic number
for the format written by this handler.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#setVotableVersion-uk.ac.starlink.votable.VOTableVersion-">setVotableVersion</a></span>(<a href="../../../../uk/ac/starlink/votable/VOTableVersion.html" title="class in uk.ac.starlink.votable">VOTableVersion</a> votVersion)</code>
<div class="block">Sets the version of the VOTable standard to use for encoding metadata
in the primary HDU.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#writeStarTables-uk.ac.starlink.table.TableSequence-java.io.OutputStream-">writeStarTables</a></span>(uk.ac.starlink.table.TableSequence tableSeq,
java.io.OutputStream out)</code> </td>
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<h3>Methods inherited from class uk.ac.starlink.fits.AbstractFitsTableWriter</h3>
<code>addMetadata, createSerializer, getCurrentDate, getFormatName, getMimeType, setFormatName, writePrimaryHDU, writeStarTable, writeStarTables, writeTableHDU</code></li>
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<h3>Methods inherited from class uk.ac.starlink.table.StreamStarTableWriter</h3>
<code>writeStarTable</code></li>
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<h3>Methods inherited from interface uk.ac.starlink.table.StarTableWriter</h3>
<code>looksLikeFile, writeStarTable</code></li>
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<h4>VOTableFitsTableWriter</h4>
<pre>protected VOTableFitsTableWriter(java.lang.String formatName)</pre>
<div class="block">Constructor.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>formatName</code> - handler format name</dd>
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<h4>writeStarTables</h4>
<pre>public void writeStarTables(uk.ac.starlink.table.TableSequence tableSeq,
java.io.OutputStream out)
throws java.io.IOException</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>writeStarTables</code> in interface <code>uk.ac.starlink.table.MultiStarTableWriter</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>writeStarTables</code> in class <code>uk.ac.starlink.fits.AbstractFitsTableWriter</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code></dd>
</dl>
</li>
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<a name="setVotableVersion-uk.ac.starlink.votable.VOTableVersion-">
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<h4>setVotableVersion</h4>
<pre>public void setVotableVersion(<a href="../../../../uk/ac/starlink/votable/VOTableVersion.html" title="class in uk.ac.starlink.votable">VOTableVersion</a> votVersion)</pre>
<div class="block">Sets the version of the VOTable standard to use for encoding metadata
in the primary HDU.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>votVersion</code> - VOTable version to use</dd>
</dl>
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<h4>customisePrimaryHeader</h4>
<pre>protected abstract void customisePrimaryHeader(nom.tam.fits.Header hdr)
throws nom.tam.fits.HeaderCardException</pre>
<div class="block">Hook for adding custom entries to the FITS header which is written
to the primary HDU. This is called just after the required
cards (SIMPLE, BITPIX, NAXIS, NAXIS1 ) are added and just before
the EXTEND card.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>hdr</code> - </dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>nom.tam.fits.HeaderCardException</code></dd>
</dl>
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<h4>isMagic</h4>
<pre>public boolean isMagic(byte[] buffer)</pre>
<div class="block">Determines whether a given byte buffer looks like it contains
the start of a primary header written by this writer.
Calls the protected
<a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#isMagic-int-java.lang.String-java.lang.String-"><code>isMagic(int,java.lang.String,java.lang.String)</code></a> method.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - start of a file</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true iff <code>buffer</code> looks like it contains a
file written by this handler</dd>
</dl>
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<h4>isMagic</h4>
<pre>protected boolean isMagic(int icard,
java.lang.String key,
java.lang.String value)</pre>
<div class="block">Tests a header card to see if it looks like part of the magic number
for the format written by this handler.
The <code>VOTableFitsTableWriter</code> implementation tests that
the first four cards read:
<pre>
SIMPLE = T
BITPIX = 8
NAXIS = 1
NAXIS1 = ???
</pre>
Subclasses may override this to add tests for later cards
(as written in <a href="../../../../uk/ac/starlink/votable/VOTableFitsTableWriter.html#customisePrimaryHeader-nom.tam.fits.Header-"><code>customisePrimaryHeader(nom.tam.fits.Header)</code></a>).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>icard</code> - 0-based card index</dd>
<dd><code>key</code> - card name</dd>
<dd><code>value</code> - card value</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true iff the presented card is one that could have been
written by this writer</dd>
</dl>
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