http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

/* $Id: EventListener.java 1734671 2016-03-12 05:39:53Z gadams $ */

package org.apache.fop.events;


This interface is implemented by clients who want to listen for events.

/**
 * This interface is implemented by clients who want to listen for events.
 */
// @SuppressFBWarnings("NM_SAME_SIMPLE_NAME_AS_INTERFACE")
public interface EventListener extends java.util.EventListener {

    
This method is called for each event that is generated. With the event's ID it is possible
to react to certain events. Events can also simply be recorded and presented to a user.
It is possible to throw an (unchecked) exception if the processing needs to be aborted
because some special event occurred. This way the client can configure the behaviour of
the observed application.

Params:
  • event – the event
/**
     * This method is called for each event that is generated. With the event's ID it is possible
     * to react to certain events. Events can also simply be recorded and presented to a user.
     * It is possible to throw an (unchecked) exception if the processing needs to be aborted
     * because some special event occurred. This way the client can configure the behaviour of
     * the observed application.
     * @param event the event
     */
    void processEvent(Event event);

}