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NodeBase.h

00001 /**********************************************************************
00002  * $Id: NodeBase.h 2556 2009-06-06 22:22:28Z strk $
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 // Forward declarations
00028 namespace geos {
00029         namespace geom {
00030                 class Coordinate;
00031                 class Envelope;
00032         }
00033         namespace index {
00034                 class ItemVisitor;
00035                 namespace quadtree {
00036                         class Node;
00037                 }
00038         }
00039 }
00040 
00041 namespace geos {
00042 namespace index { // geos::index
00043 namespace quadtree { // geos::index::quadtree
00044 
00050 class GEOS_DLL NodeBase {
00051 
00052 private:
00053 
00054         void visitItems(const geom::Envelope* searchEnv,
00055                         ItemVisitor& visitor);
00056         
00057 public:
00058 
00059         static int getSubnodeIndex(const geom::Envelope *env,
00060                         const geom::Coordinate& centre);
00061 
00062         NodeBase();
00063 
00064         virtual ~NodeBase();
00065 
00066         std::vector<void*>& getItems();
00067 
00070         void add(void* item);
00071 
00073         std::vector<void*>& addAllItems(std::vector<void*>& resultItems) const;
00074 
00075         virtual void addAllItemsFromOverlapping(const geom::Envelope& searchEnv,
00076                         std::vector<void*>& resultItems) const;
00077 
00078         unsigned int depth() const;
00079 
00080         unsigned int size() const;
00081 
00082         unsigned int getNodeCount() const;
00083 
00084         virtual std::string toString() const;
00085 
00086         virtual void visit(const geom::Envelope* searchEnv, ItemVisitor& visitor);
00087 
00095         bool remove(const geom::Envelope* itemEnv, void* item);
00096  
00097         bool hasItems() const;
00098 
00099         bool hasChildren() const;
00100 
00101         bool isPrunable() const;
00102 
00103 protected:
00104 
00106         std::vector<void*> items;
00107 
00118         Node* subnode[4];
00119 
00120         virtual bool isSearchMatch(const geom::Envelope& searchEnv) const=0;
00121 };
00122 
00123 
00124 // INLINES, To be moved in NodeBase.inl
00125 
00126 inline bool
00127 NodeBase::hasChildren() const
00128 {
00129         for (int i = 0; i < 4; i++) 
00130                 if (subnode[i]) return true;
00131         return false;
00132 }
00133 
00134 inline bool
00135 NodeBase::isPrunable() const
00136 {
00137         return ! (hasChildren() || hasItems());
00138 }
00139 
00140 inline bool
00141 NodeBase::hasItems() const
00142 {
00143         return ! items.empty();
00144 }
00145 
00146 } // namespace geos::index::quadtree
00147 } // namespace geos::index
00148 } // namespace geos
00149 
00150 #endif // GEOS_IDX_QUADTREE_NODEBASE_H
00151 
00152 /**********************************************************************
00153  * $Log$
00154  * Revision 1.1  2006/03/22 12:22:50  strk
00155  * indexQuadtree.h split
00156  *
00157  **********************************************************************/
00158 

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