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: import gnu.classpath.jdwp.exception.InvalidClassException;
  45: import gnu.classpath.jdwp.id.ReferenceTypeId;
  46: 
  47: /**
  48:  * An event filter which includes events matching a 
  49:  * specified class pattern (exact match or start/end with "*").
  50:  *
  51:  * @author Keith Seitz  (keiths@redhat.com)
  52:  */
  53: public class ClassMatchFilter
  54:   implements IEventFilter
  55: {
  56:   // Pattern to match
  57:   private String _pattern;
  58: 
  59:   /**
  60:    * Constructs a new <code>ClassMatchFilter</code>
  61:    *
  62:    * @param  pattern  the pattern to use
  63:    * @throws InvalidStringException  if pattern is invalid
  64:    */
  65:   public ClassMatchFilter (String pattern)
  66:     throws InvalidStringException
  67:   {
  68:     int index = pattern.indexOf ('*');
  69:     if (index != -1 && index != 0 && index != (pattern.length () - 1))
  70:       {
  71:     // '*' must be first char or last char
  72:     throw new InvalidStringException ("pattern may be an exact match or "
  73:                       + "start/end with \"*\"");
  74:       }
  75:     _pattern = pattern;
  76:   }
  77: 
  78:   /**
  79:    * Returns the pattern to be matched
  80:    *
  81:    * @return the pattern
  82:    */
  83:   public String getPattern ()
  84:   {
  85:     return _pattern;
  86:   }
  87: 
  88:   /**
  89:    * Does the given event match the filter?
  90:    *
  91:    * @param event  the <code>Event</code> to scrutinize
  92:    */
  93:   public boolean matches (Event event)
  94:   {
  95:     Object type = event.getParameter (ReferenceTypeId.class);
  96:     if (type != null)
  97:       {
  98:     Class eventClass = (Class) type;
  99:     String name = eventClass.getName ();
 100:     
 101:     if (_pattern.startsWith ("*"))
 102:       return name.endsWith (_pattern.substring (1));
 103:     else if (_pattern.endsWith ("*"))
 104:       {
 105:         int end = _pattern.length () - 1;
 106:         return name.startsWith (_pattern.substring (0, end));
 107:       }
 108:     else
 109:       return name.matches (_pattern);
 110:       }
 111: 
 112:     return false;
 113:   }
 114: }