/*
 * 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.core;

import freemarker.template.Configuration;
import freemarker.template.Version;

/**
 * An object that has another older version that's used below a certain
 * {@link Configuration#setIncompatibleImprovements(Version) InCompatible Improvements} version.  
 */
interface ICIChainMember {

    /**
     * The minimum ICE version after which this object can be used.
     */
    int getMinimumICIVersion();

    /**
     * The closest object used for ICE lower than {@link #getMinimumICIVersion()}.
     */
    Object getPreviousICIChainMember();
    
}
