001/* 002 * Copyright 2002-2018 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.asm.MethodVisitor; 020import org.springframework.expression.TypedValue; 021import org.springframework.expression.spel.CodeFlow; 022 023/** 024 * Expression language AST node that represents a string literal. 025 * 026 * @author Andy Clement 027 * @author Juergen Hoeller 028 * @since 3.0 029 */ 030public class StringLiteral extends Literal { 031 032 private final TypedValue value; 033 034 035 public StringLiteral(String payload, int pos, String value) { 036 super(payload, pos); 037 value = value.substring(1, value.length() - 1); 038 this.value = new TypedValue(value.replaceAll("''", "'").replaceAll("\"\"", "\"")); 039 this.exitTypeDescriptor = "Ljava/lang/String"; 040 } 041 042 043 @Override 044 public TypedValue getLiteralValue() { 045 return this.value; 046 } 047 048 @Override 049 public String toString() { 050 return "'" + getLiteralValue().getValue() + "'"; 051 } 052 053 @Override 054 public boolean isCompilable() { 055 return true; 056 } 057 058 @Override 059 public void generateCode(MethodVisitor mv, CodeFlow cf) { 060 mv.visitLdcInsn(this.value.getValue()); 061 cf.pushDescriptor(this.exitTypeDescriptor); 062 } 063 064}