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1: /* InstanceOnlyFilter.java -- filter on instance 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.InvalidObjectException; 44: import gnu.classpath.jdwp.id.ObjectId; 45: 46: /** 47: * Restricts reported events to those whose active 'this' object is the 48: * given object. Match value is the null object for static methods. 49: * 50: * This modifier can be used with any event kind except class prepare, 51: * class unload, thread start, and thread end. Introduced in JDWP version 1.4. 52: * 53: * @author Keith Seitz (keiths@redhat.com) 54: */ 55: public class InstanceOnlyFilter 56: implements IEventFilter 57: { 58: private ObjectId _instance; 59: 60: /** 61: * Constructs a new <code>InstanceOnlyFilter</code>. 62: * 63: * @param oid the object to which to restrict events (may be null) 64: * @throws InvalidObjectException if Object is invalid 65: */ 66: public InstanceOnlyFilter (ObjectId oid) 67: throws InvalidObjectException 68: { 69: if (oid != null && oid.getReference().get () == null) 70: throw new InvalidObjectException (oid.getId ()); 71: 72: _instance = oid; 73: } 74: 75: /** 76: * Returns the instance to which to restrict events 77: * 78: * @return the object's ID 79: */ 80: public ObjectId getInstance () 81: { 82: return _instance; 83: } 84: 85: /** 86: * Does the given event match the filter? 87: * 88: * @param event the <code>Event</code> to scrutinize 89: */ 90: public boolean matches (Event event) 91: { 92: Object eventInstance = event.getParameter (Event.EVENT_INSTANCE); 93: if (eventInstance != null) 94: { 95: Object myInstance = _instance.getReference().get (); 96: return ((myInstance != null) && (myInstance == eventInstance)); 97: } 98: 99: return false; 100: } 101: }