libjava/classpath/gnu/classpath/jdwp/event/filters/ClassMatchFilter.java

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