LinearIterator.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2005-2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: linearref/LinearIterator.java r463
 *
 **********************************************************************/
 
#ifndef GEOS_LINEARREF_LINEARITERATOR_H
#define GEOS_LINEARREF_LINEARITERATOR_H
 
#include <string>
 
#include <geos/geom/Coordinate.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/LineSegment.h>
#include <geos/linearref/LinearLocation.h>
 
namespace geos { namespace linearref
{

class LinearIterator
{
public:
        LinearIterator(const geom::Geometry *linear);

        LinearIterator(const geom::Geometry *linear, const LinearLocation& start);

        LinearIterator(const geom::Geometry *linear, unsigned int componentIndex, unsigned int vertexIndex);

        bool hasNext() const;
 

        void next();

        bool isEndOfLine() const;

        unsigned int getComponentIndex() const;

        unsigned int getVertexIndex() const;

        const geom::LineString* getLine() const;

        geom::Coordinate getSegmentStart() const;

        geom::Coordinate getSegmentEnd() const;
 
private:
 
        static unsigned int segmentEndVertexIndex(const LinearLocation& loc);
 
        const geom::LineString *currentLine;
        unsigned int vertexIndex;
        unsigned int componentIndex;
        const geom::Geometry *linear;
        const unsigned int numLines;

        void loadCurrentLine();
 
    // Declare type as noncopyable
    LinearIterator(const LinearIterator& other);
    LinearIterator& operator=(const LinearIterator& rhs);
};
 
}} // namespace geos::linearref
 
#endif // GEOS_LINEARREF_LINEARITERATOR_H