shapetable.java

水晶 ? ? 报表 ? ? ? 源码

/* ======================================
 * JFreeChart : a free Java chart library
 * ======================================
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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.
 *
 * ---------------
 * ShapeTable.java
 * ---------------
 * (C) Copyright 2003, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ShapeTable.java,v 1.1 2003/07/23 15:00:29 mungady Exp $
 *
 * Changes
 * -------
 * 27-Jan-2002 : Version 1 (DG);
 * 14-Feb-2003 : Fixed bug in setShape() method (DG);
 * 21-May-2003 : Implementation now uses ObjectTable as backend (TM).
 */

package org.jfree.util;

import java.awt.Shape;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OptionalDataException;
import java.io.Serializable;

import org.jfree.io.SerialUtilities;

/**
 * A lookup table for <code>Shape</code> objects.
 *
 * @author David Gilbert
 */
public class ShapeTable extends ObjectTable implements Serializable {

    /**
     * Creates a new shape table.
     */
    public ShapeTable() {
    }

    /**
     * Returns the shape object from a particular cell in the table.
     *
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     *
     * @return The shape.
     */
    public Shape getShape(int row, int column) {

      return (Shape) getObject(row, column);
    }

    /**
     * Sets the shape for an item.
     *
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * @param shape  the shape.
     */
    public void setShape(int row, int column, Shape shape) {
      setObject(row, column, shape);
    }

    /**
     * Tests this shape table for equality with another object (typically also a shape table).
     *
     * @param o  the other object.
     *
     * @return A boolean.
     */
    public boolean equals(Object o) {

        if (o instanceof ShapeTable) {
            return super.equals(o);
        }

        return false;

    }

    /**
     * Handles the serialization of an single element of this table.
     *
     * @param stream the stream which should write the object
     * @param o the object that should be serialized
     * @throws IOException if an IO error occured
     */
    protected void writeSerializedData(ObjectOutputStream stream, Object o) throws IOException {
        SerialUtilities.writeShape((Shape) o, stream);
    }
  
    /**
     * Handles the deserialization of a single element of the table.
     *
     * @param stream the object input stream from which to read the object.
     * @return the deserialized object
     * @exception ClassNotFoundException Class of a serialized object cannot be found.
     * @exception OptionalDataException Primitive data was found in the stream instead of objects.
     * @exception IOException Any of the usual Input/Output related exceptions.
     */
    protected Object readSerializedData(ObjectInputStream stream)
        throws OptionalDataException, ClassNotFoundException, IOException {
        
        return SerialUtilities.readShape(stream);
    }

}