001/*
002 * Copyright 2002-2019 the original author or authors.
003 *
004 * Licensed under the Apache 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 *      https://www.apache.org/licenses/LICENSE-2.0
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
017package org.springframework.expression.spel.ast;
018
019import org.springframework.expression.EvaluationException;
020import org.springframework.expression.TypedValue;
021import org.springframework.expression.spel.ExpressionState;
022
023/**
024 * Represents assignment. An alternative to calling {@code setValue}
025 * for an expression which indicates an assign statement.
026 *
027 * <p>Example: 'someNumberProperty=42'
028 *
029 * @author Andy Clement
030 * @since 3.0
031 */
032public class Assign extends SpelNodeImpl {
033
034        public Assign(int startPos, int endPos, SpelNodeImpl... operands) {
035                super(startPos, endPos, operands);
036        }
037
038
039        @Override
040        public TypedValue getValueInternal(ExpressionState state) throws EvaluationException {
041                TypedValue newValue = this.children[1].getValueInternal(state);
042                getChild(0).setValue(state, newValue.getValue());
043                return newValue;
044        }
045
046        @Override
047        public String toStringAST() {
048                return getChild(0).toStringAST() + "=" + getChild(1).toStringAST();
049        }
050
051}