/*
* Based on JUEL 2.2.1 code, 2006-2009 Odysseus Software GmbH
*
* 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 org.activiti.engine.impl.juel;
/**
* Tree cache interface.
* A tree cache holds expression trees by expression strings. A tree cache implementation
* must be thread-safe.
*
* @author Christoph Beck
*/
public interface TreeCache {
/**
* Lookup tree
*/
public Tree get(String expression);
/**
* Cache tree
*/
public void put(String expression, Tree tree);
}