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}