Source for gnu.classpath.jdwp.event.filters.ClassMatchFilter

   1: /* ClassMatchFilter.java -- filter on class name (inclusive)
   2:    Copyright (C) 2005 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: terms of your choice, provided that you also meet, for each linked
  32: independent module, the terms and conditions of the license of that
  33: module.  An independent module is a module which is not derived from
  34: or based on this library.  If you modify this library, you may extend
  35: this exception to your version of the library, but you are not
  36: obligated to do so.  If you do not wish to do so, delete this
  37: exception statement from your version. */
  38: 
  39: 
  40: package gnu.classpath.jdwp.event.filters;
  41: 
  42: import gnu.classpath.jdwp.event.Event;
  43: import gnu.classpath.jdwp.exception.InvalidStringException;
  44: 
  45: /**
  46:  * An event filter which includes events matching a
  47:  * specified class pattern (exact match or start/end with "*").
  48:  *
  49:  * @author Keith Seitz  (keiths@redhat.com)
  50:  */
  51: public class ClassMatchFilter
  52:   implements IEventFilter
  53: {
  54:   // Pattern to match
  55:   private String _pattern;
  56: 
  57:   /**
  58:    * Constructs a new <code>ClassMatchFilter</code>
  59:    *
  60:    * @param  pattern  the pattern to use
  61:    * @throws InvalidStringException  if pattern is invalid
  62:    */
  63:   public ClassMatchFilter (String pattern)
  64:     throws InvalidStringException
  65:   {
  66:     int index = pattern.indexOf ('*');
  67:     if (index != -1 && index != 0 && index != (pattern.length () - 1))
  68:       {
  69:         // '*' must be first char or last char
  70:         throw new InvalidStringException ("pattern may be an exact match or "
  71:                                           + "start/end with \"*\"");
  72:       }
  73:     _pattern = pattern;
  74:   }
  75: 
  76:   /**
  77:    * Returns the pattern to be matched
  78:    *
  79:    * @return the pattern
  80:    */
  81:   public String getPattern ()
  82:   {
  83:     return _pattern;
  84:   }
  85: 
  86:   /**
  87:    * Does the given event match the filter?
  88:    *
  89:    * @param event  the <code>Event</code> to scrutinize
  90:    */
  91:   public boolean matches (Event event)
  92:   {
  93:     Object type = event.getParameter (Event.EVENT_CLASS);
  94:     if (type != null)
  95:       {
  96:         Class eventClass = (Class) type;
  97:         String name = eventClass.getName ();
  98: 
  99:         if (_pattern.startsWith ("*"))
 100:           return name.endsWith (_pattern.substring (1));
 101:         else if (_pattern.endsWith ("*"))
 102:           {
 103:             int end = _pattern.length () - 1;
 104:             return name.startsWith (_pattern.substring (0, end));
 105:           }
 106:         else
 107:           return name.matches (_pattern);
 108:       }
 109: 
 110:     return false;
 111:   }
 112: }