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LinearIterator.h

00001 /**********************************************************************
00002  * $Id: LinearIterator.h 2809 2009-12-06 01:05:24Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2005-2006 Refractions Research Inc.
00008  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00009  *
00010  * This is free software; you can redistribute and/or modify it under
00011  * the terms of the GNU Lesser General Public Licence as published
00012  * by the Free Software Foundation.
00013  * See the COPYING file for more information.
00014  *
00015  **********************************************************************
00016  *
00017  * Last port: linearref/LinearIterator.java rev. 1.10
00018  *
00019  **********************************************************************/
00020 
00021 #ifndef GEOS_LINEARREF_LINEARITERATOR_H
00022 #define GEOS_LINEARREF_LINEARITERATOR_H
00023 
00024 #include <string>
00025 
00026 #include <geos/geom/Coordinate.h>
00027 #include <geos/geom/Geometry.h>
00028 #include <geos/geom/LineSegment.h>
00029 #include <geos/linearref/LinearLocation.h>
00030 
00031 namespace geos { namespace linearref
00032 {
00033 
00051 class LinearIterator
00052 {
00053 public:
00059         LinearIterator(const geom::Geometry *linear);
00060 
00068         LinearIterator(const geom::Geometry *linear, const LinearLocation& start);
00069 
00078         LinearIterator(const geom::Geometry *linear, unsigned int componentIndex, unsigned int vertexIndex);
00079 
00084         bool hasNext() const;
00085 
00086 
00090         void next();
00091 
00098         bool isEndOfLine() const;
00099 
00104         unsigned int getComponentIndex() const;
00105 
00110         unsigned int getVertexIndex() const;
00111 
00116         const geom::LineString* getLine() const;
00117 
00123         geom::Coordinate getSegmentStart() const;
00124 
00132         geom::Coordinate getSegmentEnd() const;
00133 
00134 private:
00135 
00136         static unsigned int segmentEndVertexIndex(const LinearLocation& loc);
00137 
00138         const geom::LineString *currentLine;
00139         unsigned int vertexIndex;
00140         unsigned int componentIndex;
00141         const geom::Geometry *linear;
00142         const unsigned int numLines;
00143 
00147         void loadCurrentLine();
00148 
00149     // Declare type as noncopyable
00150     LinearIterator(const LinearIterator& other);
00151     LinearIterator& operator=(const LinearIterator& rhs);
00152 };
00153 
00154 }} // namespace geos::linearref
00155 
00156 #endif // GEOS_LINEARREF_LINEARITERATOR_H

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