001    /**
002     * Copyright 2005-2013 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.krms.framework.engine.expression;
017    
018    import org.kuali.rice.krms.api.engine.ExecutionEnvironment;
019    
020    /**
021     * Interface for implementing Expressions, invoked on a {@link ExecutionEnvironment}
022     * @author Kuali Rice Team (rice.collab@kuali.org)
023     *
024     */
025    public interface Expression<T> {
026    
027        /**
028         * Invoke on the given {@link ExecutionEnvironment}.
029         * @param environment {@link ExecutionEnvironment} to invoke on.
030         * @return T
031         */
032            T invoke(ExecutionEnvironment environment);
033            
034    }