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: * BasicStrokeObjectDescription.java
029: * ---------------------------------
030: * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
031: *
032: * Original Author: Thomas Morgner;
033: * Contributor(s): David Gilbert (for Object Refinery Limited);
034: *
035: * $Id: BasicStrokeObjectDescription.java,v 1.4 2006/01/27 18:53:15 taqua Exp $
036: *
037: * Changes (from 19-Feb-2003)
038: * -------------------------
039: * 19-Feb-2003 : Added standard header and Javadocs (DG);
040: * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
041: *
042: */
043:
044: package org.jfree.xml.factory.objects;
045:
046: import java.awt.BasicStroke;
047:
048: /**
049: * An object-description for a <code>BasicStroke</code> object.
050: *
051: * @author Thomas Morgner
052: */
053: public class BasicStrokeObjectDescription extends
054: AbstractObjectDescription {
055:
056: /**
057: * Creates a new object description.
058: */
059: public BasicStrokeObjectDescription() {
060: super (BasicStroke.class);
061: setParameterDefinition("value", String.class);
062: setParameterDefinition("width", Float.class);
063: setParameterDefinition("dashes", Float[].class);
064: }
065:
066: /**
067: * Returns a parameter as a float.
068: *
069: * @param param the parameter name.
070: *
071: * @return The float value.
072: */
073: private float getFloatParameter(final String param) {
074: final String p = (String) getParameter(param);
075: if (p == null) {
076: return 0;
077: }
078: try {
079: return Float.parseFloat(p);
080: } catch (Exception e) {
081: return 0;
082: }
083: }
084:
085: /**
086: * Creates a new <code>BasicStroke</code> object based on this description.
087: *
088: * @return The <code>BasicStroke</code> object.
089: */
090: public Object createObject() {
091:
092: final float width = getFloatParameter("value");
093: if (width > 0) {
094: return new BasicStroke(width);
095: }
096:
097: Float realWidth = (Float) getParameter("width");
098: Float[] dashes = (Float[]) getParameter("dashes");
099: if (realWidth == null || dashes == null) {
100: return null;
101: }
102: float[] dashesPrimitive = new float[dashes.length];
103: for (int i = 0; i < dashes.length; i++) {
104: Float dash = dashes[i];
105: dashesPrimitive[i] = dash.floatValue();
106: }
107: return new BasicStroke(realWidth.floatValue(),
108: BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f,
109: dashesPrimitive, 0.0f);
110: }
111:
112: /**
113: * Sets the parameters for this description to match the supplied object.
114: *
115: * @param o the object (instance of <code>BasicStroke</code> required).
116: *
117: * @throws ObjectFactoryException if the supplied object is not an instance of
118: * <code>BasicStroke</code>.
119: */
120: public void setParameterFromObject(final Object o)
121: throws ObjectFactoryException {
122: if (!(o instanceof BasicStroke)) {
123: throw new ObjectFactoryException(
124: "Expected object of type BasicStroke");
125: }
126: final BasicStroke bs = (BasicStroke) o;
127: setParameter("value", String.valueOf(bs.getLineWidth()));
128: }
129: }
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