org.geotools.geometry.jts.coordinatesequence.DefaultCSBuilder Maven / Gradle / Ivy

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The main module contains the GeoTools public interfaces that are used by other GeoTools modules (and GeoTools applications). Where possible we make use industry standard terms as provided by OGC and ISO standards. The formal GeoTools public api consists of gt-metadata, jts and the gt-main module. The main module contains the default implementations that are available provided to other GeoTools modules using our factory system. Factories are obtained from an appropriate FactoryFinder, giving applications a chance configure the factory used using the Factory Hints facilities. FilterFactory ff = CommonFactoryFinder.getFilterFactory(); Expression expr = ff.add( expression1, expression2 ); If you find yourself using implementation specific classes chances are you doing it wrong: Expression expr = new AddImpl( expression1, expressiom2 );

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 * Created on 31-dic-2004
 */
package org.geotools.geometry.jts.coordinatesequence;

import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.CoordinateSequence;
import org.locationtech.jts.geom.CoordinateSequenceFactory;
import org.locationtech.jts.geom.impl.CoordinateArraySequenceFactory;

/**
 * A CSBuilder that generates DefaultCoordinateSequence objects, that is, coordinate sequences
 * backed by a Coordinate[] array.
 *
 * @author wolf
 */
public class DefaultCSBuilder implements CSBuilder {

    private Coordinate[] coordinateArray;
    private CoordinateSequenceFactory factory = CoordinateArraySequenceFactory.instance();

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#start(int, int) */
    public void start(int size, int dimensions) {
        coordinateArray = new Coordinate[size];
        for (int i = 0; i < size; i++) coordinateArray[i] = new Coordinate();
    }

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#getCoordinateSequence() */
    public CoordinateSequence end() {
        CoordinateSequence cs = factory.create(coordinateArray);
        coordinateArray = null;
        return cs;
    }

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#setOrdinate(double, int, int) */
    public void setOrdinate(double value, int ordinateIndex, int coordinateIndex) {
        Coordinate c = coordinateArray[coordinateIndex];
        switch (ordinateIndex) {
            case 0:
                c.x = value;
                break;
            case 1:
                c.y = value;
                break;
            case 2:
                c.setZ(value);
                break;
        }
    }

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#getOrdinate(int, int) */
    public double getOrdinate(int ordinateIndex, int coordinateIndex) {
        Coordinate c = coordinateArray[coordinateIndex];
        switch (ordinateIndex) {
            case 0:
                return c.x;
            case 1:
                return c.y;
            case 2:
                return c.getZ();
            default:
                return 0.0;
        }
    }

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#getSize() */
    public int getSize() {
        if (coordinateArray != null) {
            return coordinateArray.length;
        } else {
            return -1;
        }
    }

    /** @see org.geotools.geometry.coordinatesequence.CSBuilder#getDimension() */
    public int getDimension() {
        if (coordinateArray != null) {
            return 2;
        } else {
            return -1;
        }
    }

    /**
     * @see
     *     org.geotools.geometry.coordinatesequence.CSBuilder#setOrdinate(org.locationtech.jts.geom.CoordinateSequence,
     *     double, int, int)
     */
    public void setOrdinate(
            CoordinateSequence sequence, double value, int ordinateIndex, int coordinateIndex) {
        Coordinate c = sequence.getCoordinate(coordinateIndex);
        switch (ordinateIndex) {
            case 0:
                c.x = value;
                break;
            case 1:
                c.y = value;
                break;
            case 2:
                c.setZ(value);
                break;
        }
    }
}