/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  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 io.seata.saga.engine.expression;

/**
 * Expression
 *
 * @author lorne.cl
 */
public interface Expression {

    /**
     * Gets get value.
     *
     * @param elContext the el context
     * @return the get value
     */
    Object getValue(Object elContext);

    /**
     * Sets set value.
     *
     * @param value     the value
     * @param elContext the el context
     */
    void setValue(Object value, Object elContext);

    /**
     * Gets get expression string.
     *
     * @return the get expression string
     */
    String getExpressionString();
}