package org.apache.velocity.util;

/*
 * 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.    
 */

import org.apache.velocity.context.Context;


/**
 * Event handlers implementing this interface will automatically
 * have the method setContext called before each event.  This
 * allows the event handler to use information in the latest context
 * when responding to the event.
 *
 * <P>Important Note: Only local event handlers attached to the context
 * (as opposed to global event handlers initialized in the velocity.properties
 * file) should implement ContextAware.  Since global event handlers are
 * singletons individual requests will not be able to count on the
 * correct context being loaded before a request.
 *
 * @author <a href="mailto:wglass@wglass@forio.com">Will Glass-Husain</a>
 * @version $Id$
 * @since 1.5
 */
public interface  ContextAware
{
    /**
     * Initialize the EventHandler.
     * @param context
     */
    public void setContext( Context context );

}