spring ExpressionParser 源码
spring ExpressionParser 代码
文件路径：/spring-expression/src/main/java/org/springframework/expression/ExpressionParser.java
/*
* Copyright 2002-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.expression;
/**
* Parses expression strings into compiled expressions that can be evaluated.
* Supports parsing templates as well as standard expression strings.
*
* @author Keith Donald
* @author Andy Clement
* @since 3.0
*/
public interface ExpressionParser {
/**
* Parse the expression string and return an Expression object you can use for repeated evaluation.
* <p>Some examples:
* <pre class="code">
* 3 + 4
* name.firstName
* </pre>
* @param expressionString the raw expression string to parse
* @return an evaluator for the parsed expression
* @throws ParseException an exception occurred during parsing
*/
Expression parseExpression(String expressionString) throws ParseException;
/**
* Parse the expression string and return an Expression object you can use for repeated evaluation.
* <p>Some examples:
* <pre class="code">
* 3 + 4
* name.firstName
* </pre>
* @param expressionString the raw expression string to parse
* @param context a context for influencing this expression parsing routine (optional)
* @return an evaluator for the parsed expression
* @throws ParseException an exception occurred during parsing
*/
Expression parseExpression(String expressionString, ParserContext context) throws ParseException;
}
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