elementrendererfactory.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.
 *
 * ------------------------------
 * ElementRendererFactory.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ElementRendererFactory.java,v 1.2 2004/04/20 18:54:57 taqua Exp $
 *
 * Changes
 * -------------------------
 * 28.09.2003 : Initial version
 *
 */

package org.jfree.designer.visualeditor.bandeditor;

import java.util.ArrayList;
import javax.swing.JComponent;

import org.jfree.report.Element;

public class ElementRendererFactory
        implements ElementRenderer
{
  private final ArrayList renderers;
  private final ElementRenderer defaultRenderer;

  public ElementRendererFactory ()
  {
    renderers = new ArrayList();
    defaultRenderer = new DefaultElementRenderer();
  }

  public final void addElementRenderer (final ElementRendererModule renderer)
  {
    renderers.add(renderer);
  }

  public final JComponent getElementRenderer
          (final Element element, final boolean isSelected, final boolean hasFocus,
           final float detail)
  {
    ElementRenderer retval = defaultRenderer;

    for (int i = 0; i < renderers.size(); i++)
    {
      final ElementRendererModule mod = (ElementRendererModule) renderers.get(i);
      if (mod.canHandle(element) == false)
      {
        continue;
      }
      if (mod.isPreferredHandler())
      {
        return mod.getElementRenderer(element, isSelected, hasFocus, detail);
      }
      else
      {
        retval = mod;
      }
    }
    return retval.getElementRenderer(element, isSelected, hasFocus, detail);
  }
}