程序包 cn.taketoday.expression

接口 ExpressionParser

所有已知实现类:

InternalSpelExpressionParser, SpelExpressionParser, TemplateAwareExpressionParser

public interface ExpressionParser

Parses expression strings into compiled expressions that can be evaluated. Supports parsing templates as well as standard expression strings.

从以下版本开始:

4.0

作者:

Keith Donald, Andy Clement

方法概要

修饰符和类型	方法	说明
Expression	parseExpression(String expressionString)	Parse the expression string and return an Expression object you can use for repeated evaluation.
Expression	parseExpression(String expressionString, ParserContext context)	Parse the expression string and return an Expression object you can use for repeated evaluation.

方法详细资料

parseExpression

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
 

参数:

expressionString - the raw expression string to parse

返回:

an evaluator for the parsed expression

抛出:

ParseException - an exception occurred during parsing

parseExpression

Expression parseExpression(String expressionString,
 ParserContext context)
                    throws ParseException

Parse the expression string and return an Expression object you can use for repeated evaluation.

Some examples:

     3 + 4
     name.firstName
 

参数:

expressionString - the raw expression string to parse

context - a context for influencing this expression parsing routine (optional)

返回:

an evaluator for the parsed expression

抛出:

ParseException - an exception occurred during parsing