Key.h

00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2006 Refractions Research Inc.
00007  *
00008  * This is free software; you can redistribute and/or modify it under
00009  * the terms of the GNU Lesser General Public Licence as published
00010  * by the Free Software Foundation. 
00011  * See the COPYING file for more information.
00012  *
00013  **********************************************************************/
00014 
00015 #ifndef GEOS_IDX_BINTREE_KEY_H
00016 #define GEOS_IDX_BINTREE_KEY_H
00017 
00018 #include <geos/export.h>
00019 
00020 // Forward declarations
00021 namespace geos {
00022         namespace index { 
00023                 namespace bintree { 
00024                         class Interval;
00025                 }
00026         }
00027 }
00028 
00029 namespace geos {
00030 namespace index { // geos::index
00031 namespace bintree { // geos::index::bintree
00032 
00039 class GEOS_DLL Key {
00040 
00041 public:
00042 
00043         static int computeLevel(Interval *newInterval);
00044 
00045         Key(Interval *newInterval);
00046 
00047         ~Key();
00048 
00049         double getPoint();
00050 
00051         int getLevel();
00052 
00053         Interval* getInterval();
00054 
00055         void computeKey(Interval *itemInterval);
00056 
00057 private:
00058 
00059         // the fields which make up the key
00060         double pt;
00061         int level;
00062 
00063         // auxiliary data which is derived from the key for use in computation
00064         Interval *interval;
00065 
00066         void computeInterval(int level, Interval *itemInterval);
00067 };
00068 
00069 } // namespace geos::index::bintree
00070 } // namespace geos::index
00071 } // namespace geos
00072 
00073 #endif // GEOS_IDX_BINTREE_KEY_H
00074 

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