GEOS  3.3.8
NodeBase.h
00001 /**********************************************************************
00002  * $Id: NodeBase.h 3255 2011-03-01 17:56:10Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2006 Refractions Research Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************
00015  *
00016  * Last port: index/quadtree/NodeBase.java rev 1.9 (JTS-1.10)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_IDX_QUADTREE_NODEBASE_H
00021 #define GEOS_IDX_QUADTREE_NODEBASE_H
00022 
00023 #include <geos/export.h>
00024 #include <vector>
00025 #include <string>
00026 
00027 #ifdef _MSC_VER
00028 #pragma warning(push)
00029 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
00030 #endif
00031 
00032 // Forward declarations
00033 namespace geos {
00034         namespace geom {
00035                 class Coordinate;
00036                 class Envelope;
00037         }
00038         namespace index {
00039                 class ItemVisitor;
00040                 namespace quadtree {
00041                         class Node;
00042                 }
00043         }
00044 }
00045 
00046 namespace geos {
00047 namespace index { // geos::index
00048 namespace quadtree { // geos::index::quadtree
00049 
00055 class GEOS_DLL NodeBase {
00056 
00057 private:
00058 
00059         void visitItems(const geom::Envelope* searchEnv,
00060                         ItemVisitor& visitor);
00061         
00062 public:
00063 
00064         static int getSubnodeIndex(const geom::Envelope *env,
00065                         const geom::Coordinate& centre);
00066 
00067         NodeBase();
00068 
00069         virtual ~NodeBase();
00070 
00071         std::vector<void*>& getItems();
00072 
00075         void add(void* item);
00076 
00078         std::vector<void*>& addAllItems(std::vector<void*>& resultItems) const;
00079 
00080         virtual void addAllItemsFromOverlapping(const geom::Envelope& searchEnv,
00081                         std::vector<void*>& resultItems) const;
00082 
00083         unsigned int depth() const;
00084 
00085         unsigned int size() const;
00086 
00087         unsigned int getNodeCount() const;
00088 
00089         virtual std::string toString() const;
00090 
00091         virtual void visit(const geom::Envelope* searchEnv, ItemVisitor& visitor);
00092 
00100         bool remove(const geom::Envelope* itemEnv, void* item);
00101  
00102         bool hasItems() const;
00103 
00104         bool hasChildren() const;
00105 
00106         bool isPrunable() const;
00107 
00108 protected:
00109 
00111         std::vector<void*> items;
00112 
00123         Node* subnode[4];
00124 
00125         virtual bool isSearchMatch(const geom::Envelope& searchEnv) const=0;
00126 };
00127 
00128 
00129 // INLINES, To be moved in NodeBase.inl
00130 
00131 inline bool
00132 NodeBase::hasChildren() const
00133 {
00134         for (int i = 0; i < 4; i++) 
00135                 if (subnode[i]) return true;
00136         return false;
00137 }
00138 
00139 inline bool
00140 NodeBase::isPrunable() const
00141 {
00142         return ! (hasChildren() || hasItems());
00143 }
00144 
00145 inline bool
00146 NodeBase::hasItems() const
00147 {
00148         return ! items.empty();
00149 }
00150 
00151 } // namespace geos::index::quadtree
00152 } // namespace geos::index
00153 } // namespace geos
00154 
00155 #ifdef _MSC_VER
00156 #pragma warning(pop)
00157 #endif
00158 
00159 #endif // GEOS_IDX_QUADTREE_NODEBASE_H
00160 
00161 /**********************************************************************
00162  * $Log$
00163  * Revision 1.1  2006/03/22 12:22:50  strk
00164  * indexQuadtree.h split
00165  *
00166  **********************************************************************/
00167