001/* 002 * Copyright 2002-2014 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.standard; 018 019import org.springframework.expression.ParseException; 020import org.springframework.expression.ParserContext; 021import org.springframework.expression.common.TemplateAwareExpressionParser; 022import org.springframework.expression.spel.SpelParserConfiguration; 023import org.springframework.util.Assert; 024 025/** 026 * SpEL parser. Instances are reusable and thread-safe. 027 * 028 * @author Andy Clement 029 * @author Juergen Hoeller 030 * @since 3.0 031 */ 032public class SpelExpressionParser extends TemplateAwareExpressionParser { 033 034 private final SpelParserConfiguration configuration; 035 036 037 /** 038 * Create a parser with default settings. 039 */ 040 public SpelExpressionParser() { 041 this.configuration = new SpelParserConfiguration(); 042 } 043 044 /** 045 * Create a parser with the specified configuration. 046 * @param configuration custom configuration options 047 */ 048 public SpelExpressionParser(SpelParserConfiguration configuration) { 049 Assert.notNull(configuration, "SpelParserConfiguration must not be null"); 050 this.configuration = configuration; 051 } 052 053 054 public SpelExpression parseRaw(String expressionString) throws ParseException { 055 return doParseExpression(expressionString, null); 056 } 057 058 @Override 059 protected SpelExpression doParseExpression(String expressionString, ParserContext context) throws ParseException { 060 return new InternalSpelExpressionParser(this.configuration).doParseExpression(expressionString, context); 061 } 062 063}