LinearIterator.h

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/**********************************************************************
 *
 * 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, size_t componentIndex, size_t vertexIndex);

    bool hasNext() const;


    void next();

    bool isEndOfLine() const;

    size_t getComponentIndex() const;

    size_t getVertexIndex() const;

    const geom::LineString* getLine() const;

    geom::Coordinate getSegmentStart() const;

    geom::Coordinate getSegmentEnd() const;

private:

    static size_t segmentEndVertexIndex(const LinearLocation& loc);

    const geom::LineString* currentLine;
    size_t vertexIndex;
    size_t componentIndex;
    const geom::Geometry* linear;
    const size_t numLines;

    void loadCurrentLine();

    // Declare type as noncopyable
    LinearIterator(const LinearIterator& other) = delete;
    LinearIterator& operator=(const LinearIterator& rhs) = delete;
};

}
} // namespace geos::linearref

#endif // GEOS_LINEARREF_LINEARITERATOR_H