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1: /* ClassOnlyFilter.java -- filter on specific class 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.InvalidClassException; 44: import gnu.classpath.jdwp.id.ReferenceTypeId; 45: 46: /** 47: * An event filter which filters out events in uninteresting 48: * classes. 49: * 50: * @author Keith Seitz (keiths@redhat.com) 51: */ 52: public class ClassOnlyFilter 53: implements IEventFilter 54: { 55: // Class ID for which to filter 56: private ReferenceTypeId _id; 57: 58: /** 59: * Constructs a new <code>ClassOnlyFilter</code> 60: * 61: * @param refId the reference type id for a class for which events 62: * will be reported 63: * @throws InvalidClassException if the ID is no longer valid 64: */ 65: public ClassOnlyFilter (ReferenceTypeId refId) 66: throws InvalidClassException 67: { 68: // validity check 69: refId.getType (); 70: _id = refId; 71: } 72: 73: /** 74: * Returns the class to which to restrict events 75: * 76: * @return the class's ID 77: */ 78: public ReferenceTypeId getType () 79: { 80: return _id; 81: } 82: 83: /** 84: * Does the given event match the filter? 85: * 86: * @param event the <code>Event</code> to scrutinize 87: */ 88: public boolean matches (Event event) 89: { 90: Object type = event.getParameter (Event.EVENT_CLASS); 91: if (type != null) 92: { 93: try 94: { 95: Class clazz = _id.getType (); 96: Class eventClass = (Class) type; 97: if (clazz.isAssignableFrom (eventClass)) 98: return true; 99: } 100: catch (InvalidClassException ice) 101: { 102: // class is no longer valid 103: return false; 104: } 105: } 106: 107: return false; 108: } 109: }