reportselectionevent.java

报表设计软件,很好的

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Simba Management 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.
 *
 * ------------------------------
 * ReportSelectionEvent.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ReportSelectionEvent.java,v 1.2 2004/04/20 18:54:57 taqua Exp $
 *
 * Changes
 * -------------------------
 * 20.10.2003 : Initial version
 *
 */

package org.jfree.designer.visualeditor.bandeditor;

import java.util.EventObject;

import org.jfree.report.Element;

public final class ReportSelectionEvent
        extends EventObject
{
  public static final int SELECTION_ADDED = 1;
  public static final int SELECTION_REMOVED = 2;

  private Element[] selection;
  private int type;

  public ReportSelectionEvent (final Object source, final int type,
                               final Element selection)
  {
    this(source, type, new Element[]{selection});
  }

  public ReportSelectionEvent (final Object source, final int type,
                               final Element[] selection)
  {
    super(source);
    this.selection = new Element[selection.length];
    for (int i = 0; i < selection.length; i++)
    {
      if (selection[i] == null)
      {
        throw new NullPointerException();
      }
      this.selection[i] = selection[i];
    }

    if (type != SELECTION_ADDED && type != SELECTION_REMOVED)
    {
      throw new IllegalArgumentException("Selection type is invalid.");
    }
    this.type = type;
    this.selection = selection;
  }

  public final int getType ()
  {
    return type;
  }

  /**
   * The changed elements, never null. Don't change the array contents.
   *
   * @return the changed elements.
   */
  public final Element[] getSelection ()
  {
    return selection;
  }

}