doubledisplayfactory.java

来自「dump3 morpheus 0.2.9 src」· Java 代码 · 共 106 行

/**
 * DuMP3 version morpheus_0.2.9 - a duplicate/similar file finder in Java<BR>
 * Copyright 2005 Alexander Gr&auml;sser<BR>
 * All Rights Reserved, http://dump3.sourceforge.net/<BR>
 * <BR>
 * This file is part of DuMP3.<BR>
 * <BR>
 * DuMP3 is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later version.<BR>
 * <BR>
 * DuMP3 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 General Public License for more details.<BR>
 * <BR>
 * You should have received a copy of the GNU General Public License along with DuMP3; if not, write to the Free Software Foundation, Inc., 51 Franklin St,
 * Fifth Floor, Boston, MA 02110-1301 USA
 */
package net.za.grasser.duplicate.gui.display;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.apache.log4j.Logger;
import org.eclipse.swt.widgets.Composite;

/**
 * This class ...
 * 
 * @author <a href="http://sourceforge.net/sendmessage.php?touser=733840">pyropunk at sourceforge dot net</a>
 * @version $Revision: 1.3 $
 */
public class DoubleDisplayFactory {
  /**
   * <code>log</code> DoubleDisplayFactory -
   */
  private static final Logger log = Logger.getLogger(DoubleDisplayFactory.class);
  /**
   * <code>internal</code> DoubleDisplayFactory -
   */
  private static DoubleDisplayFactory internal = null;

  /**
   * Constructor
   */
  private DoubleDisplayFactory() {
    super();
  }

  /**
   * This method ...
   * 
   * @return DoubleDisplayFactory
   */
  public static synchronized DoubleDisplayFactory getInstance() {
    if (internal == null) {
      internal = new DoubleDisplayFactory();
    }
    return internal;
  }

  /**
   * This method generates the correct DoubleDisplay for the given type.
   * 
   * @param pPackage
   * @param pArg0
   * @param pArg1
   * @return DoubleDisplay
   */
  @SuppressWarnings({
      "unchecked", "boxing"
  })
  public final DoubleDisplay makeDoubleDisplay(final String pPackage, final Composite pArg0, final int pArg1) {
    String cls = this.getClass().getName();
    cls = cls.substring(0, cls.lastIndexOf('.') + 1) + pPackage;
    cls += ".Double" + pPackage.substring(0, 1).toUpperCase() + pPackage.substring(1) + "Display";
    try {
      final Class<DoubleDisplay> c = (Class<DoubleDisplay>)Class.forName(cls);
      final Constructor<DoubleDisplay> con = c.getConstructor(new Class[]{
          Composite.class, int.class
      });
      return con.newInstance(new Object[]{
          pArg0, pArg1
      });
    } catch (final ClassNotFoundException cnf) {
      log.error("oops", cnf);
      return null;
    } catch (final InvocationTargetException ite) {
      log.error("oops", ite);
      return null;
    } catch (final SecurityException e) {
      log.error("oops", e);
      return null;
    } catch (final NoSuchMethodException e) {
      log.error("oops", e);
      return null;
    } catch (final IllegalArgumentException e) {
      log.error("oops", e);
      return null;
    } catch (final InstantiationException e) {
      log.error("oops", e);
      return null;
    } catch (final IllegalAccessException e) {
      log.error("oops", e);
      return null;
    }
  }
}