pack.html

本程序是由JAVA实现的R-树新建、结点增加、删除功能。

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sort-Tile-Recursive(STR) packing algo.</TD>
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<CODE>private &nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../rtree/Pack.html#writePckFile(java.io.RandomAccessFile, java.io.File, rtree.Element[], rtree.Pack.Slice[])">writePckFile</A></B>(java.io.RandomAccessFile&nbsp;rFile,
             java.io.File&nbsp;tmpPckFile,
             <A HREF="../rtree/Element.html" title="class in rtree">Element</A>[]&nbsp;elmts,
             <A HREF="../rtree/Pack.Slice.html" title="class in rtree">Pack.Slice</A>[]&nbsp;sls)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Method that handles the low level details of nodes, leaves, file headers etc.</TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="Pack()"><!-- --></A><H3>
Pack</H3>
<PRE>
public <B>Pack</B>()</PRE>
<DL>
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<A NAME="packTree(java.util.List, java.lang.String)"><!-- --></A><H3>
packTree</H3>
<PRE>
public int <B>packTree</B>(java.util.List&nbsp;elmts,
                    java.lang.String&nbsp;newFile)</PRE>
<DL>
<DD>Added this new method that takes a list of <code>Element</code>s and builds a
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="packTree(rtree.RTree, java.lang.String)"><!-- --></A><H3>
packTree</H3>
<PRE>
public int <B>packTree</B>(<A HREF="../rtree/RTree.html" title="class in rtree">RTree</A>&nbsp;rtree,
                    java.lang.String&nbsp;newFile)</PRE>
<DL>
<DD>Sort-Tile-Recursive(STR) packing algo. by  Leutenegger.
     <p><b>**FLUSH THE RTREE BEFORE CALLING**</b>
     <br>Prepocess the file and sort the rectangles
     <br>Load into file
     <br>Recursively pack above MBRs to nodes at the next level.
     <br>If you give the new file name same as the old one then the old would
     be overwritten. One word of caution, whichever new file name you give, it
     would be overwritten.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rtree</CODE> - the rtree object to pack<DD><CODE>newFile</CODE> - the new rtree file after packing
<DT><B>Returns:</B><DD><b>0</b> if successfully created a new file,
     <br><b>1</b> if there is no need to pack the file, in this case a new 
     file is not created and the old file is left untouched,
     <br> Greater than zero if all fail.</DL>
</DD>
</DL>
<HR>

<A NAME="packTree(rtree.Element[], rtree.RTree, java.lang.String)"><!-- --></A><H3>
packTree</H3>
<PRE>
private int <B>packTree</B>(<A HREF="../rtree/Element.html" title="class in rtree">Element</A>[]&nbsp;elmts,
                     <A HREF="../rtree/RTree.html" title="class in rtree">RTree</A>&nbsp;rtree,
                     java.lang.String&nbsp;newFile)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="packRec(java.io.RandomAccessFile, java.io.File, rtree.Element[], int)"><!-- --></A><H3>
packRec</H3>
<PRE>
private void <B>packRec</B>(java.io.RandomAccessFile&nbsp;rFile,
                     java.io.File&nbsp;tmpPckFile,
                     <A HREF="../rtree/Element.html" title="class in rtree">Element</A>[]&nbsp;elmts,
                     int&nbsp;length)
              throws java.lang.Exception</PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="writePckFile(java.io.RandomAccessFile, java.io.File, rtree.Element[], rtree.Pack.Slice[])"><!-- --></A><H3>
writePckFile</H3>
<PRE>
private int <B>writePckFile</B>(java.io.RandomAccessFile&nbsp;rFile,
                         java.io.File&nbsp;tmpPckFile,
                         <A HREF="../rtree/Element.html" title="class in rtree">Element</A>[]&nbsp;elmts,
                         <A HREF="../rtree/Pack.Slice.html" title="class in rtree">Pack.Slice</A>[]&nbsp;sls)
                  throws java.lang.Exception</PRE>
<DL>
<DD>Method that handles the low level details of nodes, leaves, file headers etc.
     It writes the details to the rtree file.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the no. of new leaf elements created. The element themselves are in
     the 'elmts' array.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE></DL>
</DD>
</DL>
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