/*
* Copyright 2012 Research Studios Austria Forschungsges.m.b.H.
*
* 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 won.bot.framework.eventbot.filter.impl;
import won.bot.framework.eventbot.event.Event;
import won.bot.framework.eventbot.event.ConnectionSpecificEvent;
import won.bot.framework.eventbot.filter.EventFilter;
import java.net.URI;
/**
* Abstract base class for filters that will only accept events (connection specific or connection specific) with the specified connection URI.
*/
public class ConnectionUriEventFilter implements EventFilter
{
private URI connectionURI;
public ConnectionUriEventFilter(final URI connectionURI)
{
this.connectionURI = connectionURI;
}
/**
* Factory method for creating a filter from an event by using its connection URI.
* @param event
* @return the filter or null if no connection URI could be obtained from the event.
*/
public static ConnectionUriEventFilter forEvent(Event event){
URI connectionUri = getConnectionUriFromEvent(event);
if (connectionUri == null) return null;
return new ConnectionUriEventFilter(connectionUri);
}
@Override
public boolean accept(final Event event)
{
URI connectionUriOfEvent = getConnectionUriFromEvent(event);
if (connectionUriOfEvent == null) return false;
return connectionUriOfEvent.equals(this.connectionURI);
}
public URI getConnectionURI()
{
return connectionURI;
}
private static URI getConnectionUriFromEvent(final Event event)
{
if (event instanceof ConnectionSpecificEvent){
return ((ConnectionSpecificEvent)event).getConnectionURI();
}
return null;
}
}