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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) 2002-2008, 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.
 */
package org.geotools.styling;

import javax.measure.Unit;
import javax.measure.quantity.Length;
import org.geotools.util.SimpleInternationalString;
import org.opengis.style.StyleVisitor;
import org.opengis.util.Cloneable;

/**
 * Provides a Java representation of the PointSymbolizer. This defines how points are to be
 * rendered.
 *
 * @author Ian Turton, CCG
 * @author Johann Sorel (Geomatys)
 * @version $Id$
 */
public class PointSymbolizerImpl extends AbstractSymbolizer implements PointSymbolizer, Cloneable {

    private GraphicImpl graphic = new GraphicImpl();

    /** Creates a new instance of DefaultPointSymbolizer */
    protected PointSymbolizerImpl() {
        this(
                new GraphicImpl(),
                null,
                null,
                null,
                new DescriptionImpl(
                        new SimpleInternationalString("title"),
                        new SimpleInternationalString("abstract")));
    }

    protected PointSymbolizerImpl(
            Graphic graphic, Unit uom, String geom, String name, Description desc) {
        super(name, desc, geom, uom);
        this.graphic = GraphicImpl.cast(graphic);
    }

    /**
     * Provides the graphical-symbolization parameter to use for the point geometry.
     *
     * @return The Graphic to be used when drawing a point
     */
    public GraphicImpl getGraphic() {
        return graphic;
    }

    /**
     * Setter for property graphic.
     *
     * @param graphic New value of property graphic.
     */
    public void setGraphic(org.opengis.style.Graphic graphic) {
        if (this.graphic == graphic) {
            return;
        }
        this.graphic = GraphicImpl.cast(graphic);
    }

    /**
     * Accept a StyleVisitor to perform an operation on this symbolizer.
     *
     * @param visitor The StyleVisitor to accept.
     */
    public Object accept(StyleVisitor visitor, Object data) {
        return visitor.visit(this, data);
    }

    public void accept(org.geotools.styling.StyleVisitor visitor) {
        visitor.visit(this);
    }

    /**
     * Creates a deep copy clone.
     *
     * @return The deep copy clone.
     */
    public Object clone() {
        PointSymbolizerImpl clone;

        try {
            clone = (PointSymbolizerImpl) super.clone();
            if (graphic != null) clone.graphic = (GraphicImpl) ((Cloneable) graphic).clone();
        } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e); // this should never happen.
        }

        return clone;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((graphic == null) ? 0 : graphic.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (!super.equals(obj)) return false;
        if (getClass() != obj.getClass()) return false;
        PointSymbolizerImpl other = (PointSymbolizerImpl) obj;
        if (graphic == null) {
            if (other.graphic != null) return false;
        } else if (!graphic.equals(other.graphic)) return false;
        return true;
    }

    static PointSymbolizerImpl cast(org.opengis.style.Symbolizer symbolizer) {
        if (symbolizer == null) {
            return null;
        } else if (symbolizer instanceof PointSymbolizerImpl) {
            return (PointSymbolizerImpl) symbolizer;
        } else if (symbolizer instanceof org.opengis.style.PointSymbolizer) {
            org.opengis.style.PointSymbolizer pointSymbolizer =
                    (org.opengis.style.PointSymbolizer) symbolizer;
            PointSymbolizerImpl copy = new PointSymbolizerImpl();
            copy.setDescription(pointSymbolizer.getDescription());
            copy.setGeometryPropertyName(pointSymbolizer.getGeometryPropertyName());
            copy.setGraphic(pointSymbolizer.getGraphic());
            copy.setName(pointSymbolizer.getName());
            copy.setUnitOfMeasure(pointSymbolizer.getUnitOfMeasure());
            return copy;
        }
        return null; // not a PointSymbolizer
    }
}