001/**
002 * Copyright 2005-2016 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 */
016package org.kuali.rice.krms.framework.engine.expression;
017
018import org.kuali.rice.krms.api.engine.ExecutionEnvironment;
019
020/**
021 * The {@link Expression} used in Construction will be returned when invoked with any given {@link ExecutionEnvironment}
022 * @author Kuali Rice Team (rice.collab@kuali.org)
023 * 
024 */
025public final class ConstantExpression<T> implements Expression<T> {
026
027        private final T value;
028
029    /**
030     * Create a ConstantExpression with the given value
031     * @param value to set the value to
032     */
033        public ConstantExpression(T value) {
034                this.value = value;
035        }
036
037        @Override
038        public T invoke(ExecutionEnvironment environment) {
039                return value;
040        }
041
042}