001/* java.beans.beancontext.BeanContextServiceRevokedEvent
002   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010 
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.beans.beancontext;
040
041/**
042 * Event fired when services are revoked from a <code>BeanContextServices</code>.
043 *
044 * @author John Keiser
045 * @since JDK1.2
046 * @see java.beans.beancontext.BeanContextServiceRevokedListener
047 */
048
049public class BeanContextServiceRevokedEvent extends BeanContextEvent {
050       private static final long serialVersionUID = -1295543154724961754L;
051
052       /**
053         * The <code>Class</code> representing the service which is now
054         * available.
055         */
056        protected Class serviceClass;
057        private boolean invalidateRefs;
058
059        /**
060         * Create a new service revoked event.
061         * @param services the <code>BeanContextServices</code> through
062         *        which the service was available.  This is also the source
063         *        of the event.
064         * @param serviceClass the service class that is now revoked.
065         * @param revokeNow whether the revocation is immediate for all
066         *        classes or just a suggestion.
067         */
068        public BeanContextServiceRevokedEvent(BeanContextServices services, Class serviceClass, boolean revokeNow) {
069                super(services);
070                this.serviceClass = serviceClass;
071                invalidateRefs = revokeNow;
072        }
073
074        /**
075         * Get the revoked service class.
076         * @return the service class.
077         */
078        public Class getServiceClass() {
079                return serviceClass;
080        }
081
082        /**
083         * Tell whether the revoked service class is the same as the specified class.
084         * Identical to <code>getServiceClass().equals(c)</code>.
085         * @param c the class to compare.
086         * @return whether the clases are equal.
087         */
088        public boolean isServiceClass(Class c) {
089                return serviceClass.equals(c);
090        }
091
092        /**
093         * Get the <code>BeanContextServices</code> through which the service was available.
094         * @return the <code>BeanContextServices</code> through which the
095         *         service was available.
096         */
097        public BeanContextServices getSourceAsBeanContextServices() {
098                return (BeanContextServices)getSource();
099        }
100
101        /**
102         * Tell whether current instances of the revoked service are usable or not.
103         * This is determined by whether the service was revoked
104         * immediately.
105         *
106         * @return whether current instances of the revoked service are
107         *         usable.
108         */
109        public boolean isCurrentServiceInvalidNow() {
110                return invalidateRefs;
111        }
112}