| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cocoon.caching.validity; |
| |
| import org.apache.excalibur.source.SourceValidity; |
| |
| /** |
| * The SourceValidity object for cache invalidation based on |
| * external events. |
| * |
| * @author Geoff Howard (ghoward@apache.org) |
| * @version $Id: EventValidity.java,v 1.4 2004/03/05 13:01:56 bdelacretaz Exp $ |
| */ |
| public class EventValidity implements SourceValidity { |
| |
| private Event m_event; |
| |
| /** |
| * Constructor requires any subclass of Event. |
| * @param ev |
| */ |
| public EventValidity(Event ev) { |
| m_event = ev; |
| } |
| |
| /** |
| * Returns the specific Event this validity is based on. |
| * |
| * @return Event |
| */ |
| public Event getEvent() { |
| return m_event; |
| } |
| |
| /** |
| * Basic implementation is always valid until event signals |
| * otherwise. May never need other behavior. |
| */ |
| public int isValid() { |
| return VALID; |
| } |
| |
| /** |
| * Older style of isValid |
| */ |
| public int isValid(SourceValidity sv) { |
| if (sv instanceof EventValidity) { |
| return VALID; |
| } |
| return INVALID; |
| } |
| |
| |
| public boolean equals(Object o) { |
| if (o instanceof EventValidity) { |
| return m_event.equals(((EventValidity)o).getEvent()); |
| } |
| return false; |
| } |
| |
| public int hashCode() { |
| return m_event.hashCode(); |
| } |
| |
| public String toString() { |
| return "EventValidity[" + m_event + "]"; |
| } |
| } |