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jones
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<!-- Generated by javadoc on Fri Sep 24 03:23:03 CEST 1999 -->
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<title>
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Class de.tudarmstadt.ito.xmldbms.RootClassMap
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</title>
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<body>
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<a name="_top_"></a>
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<pre>
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<a href="packages.html">All Packages</a> <a href="tree.html">Class Hierarchy</a> <a href="Package-de.tudarmstadt.ito.xmldbms.html">This Package</a> <a href="de.tudarmstadt.ito.xmldbms.RelatedClassMap.html#_top_">Previous</a> <a href="de.tudarmstadt.ito.xmldbms.RootTableMap.html#_top_">Next</a> <a href="AllNames.html">Index</a></pre>
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<hr>
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<h1>
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Class de.tudarmstadt.ito.xmldbms.RootClassMap
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</h1>
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<pre>
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java.lang.Object
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+----<a href="de.tudarmstadt.ito.xmldbms.RelatedClassMap.html#_top_">de.tudarmstadt.ito.xmldbms.RelatedClassMap</a>
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+----de.tudarmstadt.ito.xmldbms.RootClassMap
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</pre>
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<hr>
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<dl>
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<dt> public class <b>RootClassMap</b>
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<dt> extends <a href="de.tudarmstadt.ito.xmldbms.RelatedClassMap.html#_top_">RelatedClassMap</a>
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</dl>
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Maps a root element type as a class; <A HREF="../readme.html#NotForUse">
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not for general use</A>.
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<P>RootClassMap is identical to RelatedClassMap, but is used differently
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and has a separate name to eliminate confusion in the code. It contains
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information about any element types mapped as classes with a type of
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TYPE_IGNOREROOT or TYPE_TOROOTTABLE. RootClassMaps are stored in a hash
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table in the Map class, indexed by element type name.</P>
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<P>For element types mapped as TYPE_TOROOTTABLE, RootClassMap provides the
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information needed to retrieve data from the table: the candidate key and
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order columns. In this case, linkInfo.parentKeyIsCandidate is always false
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and linkInfo.parentKey is always null. This is because a root table has no
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parent table. Note that for determining the location of the order column,
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linkInfo.parentKeyIsCandidate is ignored, as the order column, like the
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candidate key column, is always in the "child" (root) table.</P>
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<P>For element types mapped as TYPE_IGNOREROOT, only the classMap variable
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is used and only its type and subElementTypeMaps variables are used. The
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purpose is simply to provide a list of legal child element types; the
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RelatedClassMaps stored in subElementTypeMaps serve the same purpose as
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the RootClassMap when element types are mapped as TYPE_TOROOTTABLE (see
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above): to provide the candidate key and order columns used to access the
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"root" class table. If you find this confusing, you are correct.</P>
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<p>
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<hr>
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<a name="index"></a>
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<h2>
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<img src="images/constructor-index.gif" width=275 height=38 alt="Constructor Index">
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</h2>
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<dl>
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<dt> <img src="images/yellow-ball-small.gif" width=6 height=6 alt=" o ">
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<a href="#RootClassMap()"><b>RootClassMap</b></a>()
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<dd> Construct a RootClassMap.
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<dt> <img src="images/yellow-ball-small.gif" width=6 height=6 alt=" o ">
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<a href="#RootClassMap(de.tudarmstadt.ito.xmldbms.RelatedClassMap)"><b>RootClassMap</b></a>(RelatedClassMap)
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<dd> Construct a RootClassMap from a RelatedClassMap.
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</dl>
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<a name="constructors"></a>
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<h2>
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<img src="images/constructors.gif" width=231 height=38 alt="Constructors">
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</h2>
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<a name="RootClassMap"></a>
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<a name="RootClassMap()"><img src="images/yellow-ball.gif" width=12 height=12 alt=" o "></a>
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<b>RootClassMap</b>
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<pre>
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public RootClassMap()
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</pre>
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<dl>
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<dd> Construct a RootClassMap.
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<p>
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</dl>
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<a name="RootClassMap(de.tudarmstadt.ito.xmldbms.RelatedClassMap)"><img src="images/yellow-ball.gif" width=12 height=12 alt=" o "></a>
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<b>RootClassMap</b>
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<pre>
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public RootClassMap(<a href="de.tudarmstadt.ito.xmldbms.RelatedClassMap.html#_top_">RelatedClassMap</a> relatedClassMap)
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</pre>
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<dl>
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<dd> Construct a RootClassMap from a RelatedClassMap.
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<p>
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<dd><dl>
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<dt> <b>Parameters:</b>
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<dd> relatedClassMap - The RelatedClassMap
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</dl></dd>
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</dl>
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<hr>
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<pre>
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<a href="packages.html">All Packages</a> <a href="tree.html">Class Hierarchy</a> <a href="Package-de.tudarmstadt.ito.xmldbms.html">This Package</a> <a href="de.tudarmstadt.ito.xmldbms.RelatedClassMap.html#_top_">Previous</a> <a href="de.tudarmstadt.ito.xmldbms.RootTableMap.html#_top_">Next</a> <a href="AllNames.html">Index</a></pre>
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</body>
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</html>
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