/*
 * 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.
 */

package freemarker.cache;

import freemarker.template.Configuration;

/**
 * Interface that can be implemented by template loaders that maintain some 
 * sort of internal state (i.e. caches of earlier lookups for performance 
 * optimization purposes etc.) and support resetting of their state. 
 */
public interface StatefulTemplateLoader extends TemplateLoader {
    /**
     * Invoked by {@link Configuration#clearTemplateCache()} to instruct this
     * template loader to throw away its current state and start afresh. 
     */
    public void resetState();
}