001/* ========================================================================
002 * JCommon : a free general purpose class library for the Java(tm) platform
003 * ========================================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 * 
007 * Project Info:  http://www.jfree.org/jcommon/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it 
010 * under the terms of the GNU Lesser General Public License as published by 
011 * the Free Software Foundation; either version 2.1 of the License, or 
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but 
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022 * USA.  
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025 * in the United States and other countries.]
026 * 
027 * ----------------------
028 * BasicStrokeReadHandler
029 * ----------------------
030 * (C) Copyright 2003, by Thomas Morgner and Contributors.
031 *
032 * Original Author:  Thomas Morgner;
033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: BasicStrokeReadHandler.java,v 1.2 2005/10/18 13:33:32 mungady Exp $
036 *
037 * Changes (from 25-Nov-2003)
038 * --------------------------
039 * 25-Nov-2003 : Added standard header and Javadocs (DG);
040 *
041 */
042
043package org.jfree.xml.parser.coretypes;
044
045import java.awt.BasicStroke;
046import java.util.StringTokenizer;
047
048import org.jfree.xml.parser.AbstractXmlReadHandler;
049import org.xml.sax.Attributes;
050import org.xml.sax.SAXException;
051
052/**
053 * A SAX handler for reading a {@link BasicStroke} object from XML.
054 * <p>
055 * To do: this should have a multiplexer in front like the PaintReadHandler
056 */
057public class BasicStrokeReadHandler extends AbstractXmlReadHandler  {
058    
059    /** The stroke under construction. */
060    private BasicStroke stroke;
061
062    /**
063     * Creates a new handler.
064     */
065    public BasicStrokeReadHandler() {
066        super();
067    }
068
069    /**
070     * Called at the start of parsing a {@link BasicStroke} element, this method reads the 
071     * attributes and constructs the stroke. 
072     * 
073     * @param attrs  the attributes.
074     * 
075     * @throws SAXException to indicate a parsing error.
076     */
077    protected void startParsing(final Attributes attrs) throws SAXException {
078        final int endCap = Integer.parseInt(attrs.getValue("endCap"));
079        final int lineJoin = Integer.parseInt(attrs.getValue("lineJoin"));
080        final float lineWidth = Float.parseFloat(attrs.getValue("lineWidth"));
081        final float miterLimit = Float.parseFloat(attrs.getValue("miterLimit"));
082        final String dashArrayAttrib = attrs.getValue("dashArray");
083        if (dashArrayAttrib != null) {
084            final float[] dashArray = parseDashArray(dashArrayAttrib);
085            final float dashPhase = Float.parseFloat(attrs.getValue("dashPhase"));
086            this.stroke = new BasicStroke(
087                lineWidth, endCap, lineJoin, miterLimit, dashArray, dashPhase
088            );
089        } 
090        else {
091            this.stroke = new BasicStroke(lineWidth, endCap, lineJoin, miterLimit);
092        }
093    }
094    
095    /**
096     * Parses the dash array.
097     * 
098     * @param string  the dash array string representation.
099     * 
100     * @return a dash array.
101     */
102    private float[] parseDashArray(final String string) {
103        final StringTokenizer tokenizer = new StringTokenizer(string, ",");
104        final float[] retVal = new float[tokenizer.countTokens()];
105        for (int i = 0; i < retVal.length; i++) {
106            retVal[i] = Float.parseFloat(tokenizer.nextToken());
107        }
108        return retVal;
109    }
110
111    /**
112     * Returns the stroke under construction.
113     * 
114     * @return the stroke.
115     */
116    public Object getObject() {
117        return this.stroke;
118    }
119    
120}