DashArray.java

/*----------------    FILE HEADER  ------------------------------------------
 This file is part of deegree.
 Copyright (C) 2001-20012 by:
 Department of Geography, University of Bonn
 http://www.giub.uni-bonn.de/deegree/
 lat/lon GmbH
 http://www.lat-lon.de

 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; either
 version 2.1 of the License, or (at your option) any later version.
 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.
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 Contact:

 lat/lon GmbH
 Aennchenstr. 19
 53177 Bonn
 Germany
 E-Mail: info@lat-lon.de

 Prof. Dr. Klaus Greve
 Department of Geography
 University of Bonn
 Meckenheimer Allee 166
 53115 Bonn
 Germany
 E-Mail: greve@giub.uni-bonn.de
 ---------------------------------------------------------------------------*/

package org.deegree.igeo.style.model;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

import org.deegree.framework.utils.HashCodeUtil;

/**
 * <code>DashArray</code>
 * 
 * @author <a href="mailto:wanhoff@lat-lon.de">Jeronimo Wanhoff</a>
 * @author <a href="mailto:buesching@lat-lon.de">Lyn Buesching</a>
 * @author last edited by: $Author$
 * 
 * @version $Revision$, $Date$
 * 
 */
public class DashArray {

    private String name;

    private float[] dashArray;

    /**
     * @param name
     * @param dashArray
     */
    public DashArray( String name, float[] dashArray ) {
        super();
        this.name = name;
        this.dashArray = dashArray;
    }

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name
     *            the name to set
     */
    public void setName( String name ) {
        this.name = name;
    }

    /**
     * @return the dashArray
     */
    public float[] getDashArray() {
        return dashArray;
    }

    /**
     * @param dashArray
     *            the dashArray to set
     */
    public void setDashArray( float[] dashArray ) {
        this.dashArray = dashArray;
    }

    /**
     * @return the dash array as image
     */
    public BufferedImage getAsImage() {
        int width = 130;
        BufferedImage img = new BufferedImage( width, 3, BufferedImage.TYPE_INT_ARGB );
        Graphics g = img.getGraphics();
        int position = 0;
        do {
            position = draw( g, width, position );
        } while ( position < width );
        return img;
    }

    @Override
    public boolean equals( Object obj ) {
        if ( obj == null || !( obj instanceof DashArray ) ) {
            return false;
        }
        if ( ( name == null && ( (DashArray) obj ).name != null )
             || ( dashArray == null && ( (DashArray) obj ).dashArray != null ) ) {
            return false;
        }
        boolean equalNames = name.equals( ( (DashArray) obj ).name );
        boolean equalArrays = java.util.Arrays.equals( dashArray, ( (DashArray) obj ).getDashArray() );
        return ( equalNames && equalArrays );

    }

    @Override
    public int hashCode() {
        int result = HashCodeUtil.SEED;
        result = HashCodeUtil.hash( result, dashArray );
        result = HashCodeUtil.hash( result, name );
        return result;
    }

    private int draw( Graphics g, int imageWidth, int position ) {
        for ( int i = 0; i < this.dashArray.length; i++ ) {
            Color c;
            if ( i % 2 == 0 ) {
                c = Color.BLACK;
            } else {
                c = new Color( 255, 255, 255, 0 );
            }
            g.setColor( c );

            int width = Math.abs( (int) this.dashArray[i] ) * 3;
            int w = width;
            if ( position + width > imageWidth ) {
                w = imageWidth - position;
            }
            g.fillRect( position, 0, w, 2 );
            position = position + width;
            if ( position >= imageWidth ) {
                break;
            }
        }
        return position;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return name;
    }

}