package com.ximple.eofms.jobs;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateSequence;
import com.vividsolutions.jts.geom.CoordinateSequenceFilter;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.util.Assert;

import com.ximple.eofms.util.TWDDatumConverter;
import com.ximple.io.dgn7.GeometryConverter;

public class TWD97GeometryConverterDecorator implements GeometryConverter
{
    private GeometryConverter converter;
    private TWD97ConvertFilter coordinatesFilter = new TWD97ConvertFilter();

    public TWD97GeometryConverterDecorator()
    {
    }

    public GeometryConverter getConverter()
    {
        return converter;
    }

    public void setConverter(GeometryConverter converter)
    {
        this.converter = converter;
    }

    public Geometry toGeometry(GeometryFactory factory)
    {
        if (converter == null) Assert.shouldNeverReachHere();

        coordinatesFilter.reset();

        Geometry geom = converter.toGeometry(factory);
        if (geom == null) return null;
        geom.apply(coordinatesFilter);
        return geom;
    }

    class TWD97ConvertFilter implements CoordinateSequenceFilter
    {
        private boolean done = false;
        private boolean geometryChanged = false;

        public void filter(CoordinateSequence coordinateSequence, int i)
        {
            Coordinate pt = coordinateSequence.getCoordinateCopy(i);
            Coordinate pt97 = TWDDatumConverter.fromTM2ToTWD97(pt);
            pt.x = pt97.x;
            pt.y = pt97.y;
            pt.z = pt97.z;
            done = (i >= coordinateSequence.size());
            geometryChanged = true;
        }

        public boolean isDone()
        {
            return done;
        }

        public boolean isGeometryChanged()
        {
            return geometryChanged;
        }

        public void reset()
        {
            done = false;
            geometryChanged = false;
        }
    }
}