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.lang.Nullable; 024import org.springframework.util.Assert; 025 026/** 027 * SpEL parser. Instances are reusable and thread-safe. 028 * 029 * @author Andy Clement 030 * @author Juergen Hoeller 031 * @since 3.0 032 */ 033public class SpelExpressionParser extends TemplateAwareExpressionParser { 034 035 private final SpelParserConfiguration configuration; 036 037 038 /** 039 * Create a parser with default settings. 040 */ 041 public SpelExpressionParser() { 042 this.configuration = new SpelParserConfiguration(); 043 } 044 045 /** 046 * Create a parser with the specified configuration. 047 * @param configuration custom configuration options 048 */ 049 public SpelExpressionParser(SpelParserConfiguration configuration) { 050 Assert.notNull(configuration, "SpelParserConfiguration must not be null"); 051 this.configuration = configuration; 052 } 053 054 055 public SpelExpression parseRaw(String expressionString) throws ParseException { 056 return doParseExpression(expressionString, null); 057 } 058 059 @Override 060 protected SpelExpression doParseExpression(String expressionString, @Nullable ParserContext context) throws ParseException { 061 return new InternalSpelExpressionParser(this.configuration).doParseExpression(expressionString, context); 062 } 063 064}