Reads a Paint object that has been serialised
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Paint;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* IOUtils.java
* ------------
* (C)opyright 2002-2004, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: IOUtils.java,v 1.8 2009/01/22 08:34:58 taqua Exp $
*
* Changes
* -------
* 26-Jan-2003 : Initial version
* 23-Feb-2003 : Documentation
* 25-Feb-2003 : Fixed Checkstyle issues (DG);
* 29-Apr-2003 : Moved to jcommon
* 04-Jan-2004 : Fixed JDK 1.2.2 issues with createRelativeURL;
* added support for query strings within these urls (TM);
*/
public class Main {
/**
* Returns <code>true</code> if a class implements <code>Serializable</code>
* and <code>false</code> otherwise.
*
* @param c the class.
*
* @return A boolean.
*/
public static boolean isSerializable(final Class c) {
/**
final Class[] interfaces = c.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
if (interfaces[i].equals(Serializable.class)) {
return true;
}
}
Class cc = c.getSuperclass();
if (cc != null) {
return isSerializable(cc);
}
*/
return (Serializable.class.isAssignableFrom(c));
}
/**
* Reads a <code>Paint</code> object that has been serialised by the
* {@link SerialUtilities#writePaint(Paint, ObjectOutputStream)} method.
*
* @param stream the input stream (<code>null</code> not permitted).
*
* @return The paint object (possibly <code>null</code>).
*
* @throws IOException if there is an I/O problem.
* @throws ClassNotFoundException if there is a problem loading a class.
*/
public static Paint readPaint(final ObjectInputStream stream)
throws IOException, ClassNotFoundException {
if (stream == null) {
throw new IllegalArgumentException("Null 'stream' argument.");
}
Paint result = null;
final boolean isNull = stream.readBoolean();
if (!isNull) {
final Class c = (Class) stream.readObject();
if (isSerializable(c)) {
result = (Paint) stream.readObject();
}
else if (c.equals(GradientPaint.class)) {
final float x1 = stream.readFloat();
final float y1 = stream.readFloat();
final Color c1 = (Color) stream.readObject();
final float x2 = stream.readFloat();
final float y2 = stream.readFloat();
final Color c2 = (Color) stream.readObject();
final boolean isCyclic = stream.readBoolean();
result = new GradientPaint(x1, y1, c1, x2, y2, c2, isCyclic);
}
}
return result;
}
/**
* Serialises a <code>Paint</code> object.
*
* @param paint the paint object (<code>null</code> permitted).
* @param stream the output stream (<code>null</code> not permitted).
*
* @throws IOException if there is an I/O error.
*/
public static void writePaint(final Paint paint,
final ObjectOutputStream stream)
throws IOException {
if (stream == null) {
throw new IllegalArgumentException("Null 'stream' argument.");
}
if (paint != null) {
stream.writeBoolean(false);
stream.writeObject(paint.getClass());
if (paint instanceof Serializable) {
stream.writeObject(paint);
}
else if (paint instanceof GradientPaint) {
final GradientPaint gp = (GradientPaint) paint;
stream.writeFloat((float) gp.getPoint1().getX());
stream.writeFloat((float) gp.getPoint1().getY());
stream.writeObject(gp.getColor1());
stream.writeFloat((float) gp.getPoint2().getX());
stream.writeFloat((float) gp.getPoint2().getY());
stream.writeObject(gp.getColor2());
stream.writeBoolean(gp.isCyclic());
}
}
else {
stream.writeBoolean(true);
}
}
}
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