maskutil.java

来自「Zaval Light-Weight Visual Components Lib」· Java 代码 · 共 87 行

/**
 *     Caption: Zaval Light-Weight Visual Components Library
 *     $Revision: 2.79 $
 *     $Date: 2003/08/22 11:24:16 $
 *
 *     @author:     Andrei Vishnevsky
 *     @version:    3.50
 *
 * Zaval Light-Weight Visual Components Library (LwVCL) is a pure Java
 * alternative to humble AWT-based and SWING-based GUI interfaces for
 * wide ranges of platforms, including J2SE, PersonalJava and J2ME.
 *
 * Designed as light-weight but, alternatively to Swing, built separately
 * from AWT (not on top of the java.awt library like Swing), the LwVCL is
 * the good alternative to highly performant, memory-efficient, flexible
 * GUI solution for embedded, stand-alone and applet applications.
 *
 * For more info on this product read Zaval Light-Weight Visual Components Library Tutorial
 * (It comes within this package).
 * The latest product version is always available from the product's homepage:
 * http://www.zaval.org/products/lwvcl/
 * and from the SourceForge:
 * http://sourceforge.net/projects/zaval0003/
 *
 * Contacts:
 *   Support : [e-mail]
 *   Change Requests : [e-mail]
 *   Feedback : [e-mail]
 *   Other : [e-mail]
 *
 * Copyright (C) 2001-2003  Zaval Creative Engineering Group (http://www.zaval.org)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * (version 2) as published by the Free Software Foundation.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */
package org.zaval.lw.mask;

/**
 * This class is set of useful static methods that can be helpful for different mask features
 * implementation.
 */
public class MaskUtil
{
 /**
  * Removes the blank character from both ends of this string.
  * @param <code>s</code> the specified string.
  * @param <code>blank</code> the specified blank character.
  * @return a string with blank character removed from the front and end.
  */
  public static String trim(String s, char blank)
  {
    if (s != null)
    {
      int start = 0, end = s.length() - 1;
      while (start < s.length() && s.charAt(start) == blank) start++;
      while (end >= 0 && s.charAt(end) == blank) end--;
      return start < s.length() && end >= 0?s.substring(start, end + 1):null;
    }
    else return null;
  }

  public static String setValueByTag (char tag, String value, String tags, String tagValue)
  {
    int index = tags.indexOf(tag);
    if (index >= 0)
    {
      char[] buf = value.toCharArray();
      for (int i=0;index < tags.length() && i < tagValue.length(); index++, i++)
        buf[index] = tagValue.charAt(i);
      return new String (buf);
    }
    return value;
  }
}