/*
 * Copyright 2002-2009 the original author or authors.
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 * 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
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 *      http://www.apache.org/licenses/LICENSE-2.0
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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, Andy Clement
Since:3.0
/** * 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.

Some examples:

    3 + 4
    name.firstName
Params:
  • expressionString – the raw expression string to parse
Throws:
Returns:an evaluator for the parsed expression
/** * 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.

Some examples:

    3 + 4
    name.firstName
Params:
  • expressionString – the raw expression string to parse
  • context – a context for influencing this expression parsing routine (optional)
Throws:
Returns:an evaluator for the parsed expression
/** * 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; }