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# NodeBase.h

    00001 /**********************************************************************
    00002  * $Id: NodeBase.h 1820 2006-09-06 16:54:23Z 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 #ifndef GEOS_IDX_QUADTREE_NODEBASE_H
    00017 #define GEOS_IDX_QUADTREE_NODEBASE_H
    00018
    00019 #include <vector>
    00020 #include <string>
    00021
    00022 // Forward declarations
    00023 namespace geos {
    00024         namespace geom {
    00025                 class Coordinate;
    00026                 class Envelope;
    00027         }
    00028         namespace index {
    00029                 class ItemVisitor;
    00030                 namespace quadtree {
    00031                         class Node;
    00032                 }
    00033         }
    00034 }
    00035
    00036 namespace geos {
    00037 namespace index { // geos::index
    00038 namespace quadtree { // geos::index::quadtree
    00039
    00045 class NodeBase {
    00046
    00047 private:
    00048
    00049         void visitItems(const geom::Envelope* searchEnv,
    00050                         ItemVisitor& visitor);
    00051
    00052 public:
    00053
    00054         static int getSubnodeIndex(const geom::Envelope *env,
    00055                         const geom::Coordinate& centre);
    00056
    00057         NodeBase();
    00058
    00059         virtual ~NodeBase();
    00060
    00061         virtual std::vector<void*>* getItems();
    00062
    00063         virtual void add(void* item);
    00064
    00065         virtual std::vector<void*>* addAllItems(std::vector<void*> *resultItems);
    00066
    00067         virtual void addAllItemsFromOverlapping(const geom::Envelope *searchEnv,
    00068                         std::vector<void*> *resultItems);
    00069
    00070         virtual int depth();
    00071
    00072         virtual int size();
    00073
    00074         virtual int nodeCount();
    00075
    00076         virtual std::string toString() const;
    00077
    00078         virtual void visit(const geom::Envelope* searchEnv, ItemVisitor& visitor);
    00079
    00087         bool remove(const geom::Envelope* itemEnv, void* item);
    00088
    00089         bool hasItems() const;
    00090
    00091         bool hasChildren() const;
    00092
    00093         bool isPrunable() const;
    00094
    00095 protected:
    00096
    00097         std::vector<void*> *items;
    00098
    00107         Node* subnode[4];
    00108
    00109         virtual bool isSearchMatch(const geom::Envelope *searchEnv)=0;
    00110 };
    00111
    00112
    00113 // INLINES, To be moved in NodeBase.inl
    00114
    00115 inline bool
    00116 NodeBase::hasChildren() const
    00117 {
    00118         for (int i = 0; i < 4; i++)
    00119                 if (subnode[i]) return true;
    00120         return false;
    00121 }
    00122
    00123 inline bool
    00124 NodeBase::isPrunable() const
    00125 {
    00126         return ! (hasChildren() || hasItems());
    00127 }
    00128
    00129 inline bool
    00130 NodeBase::hasItems() const
    00131 {
    00132         return ! items->empty();
    00133 }
    00134
    00135 } // namespace geos::index::quadtree
    00136 } // namespace geos::index
    00137 } // namespace geos
    00138
    00139 #endif // GEOS_IDX_QUADTREE_NODEBASE_H
    00140
    00141 /**********************************************************************
    00142  * $Log$
    00143  * Revision 1.1  2006/03/22 12:22:50  strk
    00144  * indexQuadtree.h split
    00145  *
    00146  **********************************************************************/
    00147