debugutilities.java

来自「一个用java写的mail.里面的代码值得我们去研究！学习。」· Java 代码 · 共 71 行

/*
** $Id: DebugUtilities.java,v 1.3 2001/05/07 12:34:45 kunugi Exp $
**
** Copyright (c) 2000-2001 Jeff Gay
** on behalf of ICEMail.org <http://www.icemail.org>
** Copyright (c) 1998-2000 by Timothy Gerard Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
*/

package org.icemail.util;

import java.io.PrintWriter;


public class DebugUtilities
{
  public static void
  printClassHierarchy( Class aClass, PrintWriter writer, String prefix ) {
    String subPrefix = "-->";

    for ( int i = 0 ; ; ++i ) {
      writer.println ( prefix + " " + subPrefix + " " + aClass.getName() );

      aClass = aClass.getSuperclass();

      if ( aClass == Object.class )
        break;

      subPrefix = "--" + subPrefix;
    }
  }

  public static void
  printContainerComponents( java.awt.Container cont, PrintWriter writer,
                            String prefix, boolean recurse ) {
    java.awt.Component[] comps = cont.getComponents();

    if ( comps.length < 1 ) {
      writer.println( prefix + "Contains no components." );
    }

    for ( int i = 0 ; i < comps.length ; ++i ) {
      DebugUtilities.printClassHierarchy( comps[i].getClass(), writer, prefix + "[" +i+ "]" );

      if ( recurse ) {
        Class c = java.awt.Container.class;
        if ( c.isAssignableFrom( comps[i].getClass() ) ) {
          DebugUtilities.printContainerComponents( (java.awt.Container)comps[i], writer,
                                                   (prefix + "[" +i+ "] "), recurse );
        }
      }
    }
  }

}