Package org.springframework.expression.common

Class TemplateAwareExpressionParser

java.lang.Object

org.springframework.expression.common.TemplateAwareExpressionParser

All Implemented Interfaces:

ExpressionParser

Direct Known Subclasses:

SpelExpressionParser

public abstract class TemplateAwareExpressionParser
extends Object
implements ExpressionParser

Abstract base class for expression parsers that support templates.

Can be subclassed by expression parsers that offer first class support for templating.

Since:

3.0

Author:

Keith Donald, Juergen Hoeller, Andy Clement, Sam Brannen

Constructor Summary

Constructors

Constructor	Description
TemplateAwareExpressionParser()

Method Summary

Modifier and Type	Method	Description
protected abstract Expression	doParseExpression(String expressionString, ParserContext context)	Actually parse the expression string and return an Expression object.
Expression	parseExpression(String expressionString)	Parse the expression string and return an Expression object that can be used for repeated evaluation.
Expression	parseExpression(String expressionString, ParserContext context)	Parse the expression string and return an Expression object that can be used for repeated evaluation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TemplateAwareExpressionParser

public TemplateAwareExpressionParser()

Method Details

parseExpression

public Expression parseExpression(String expressionString)
                           throws ParseException

Description copied from interface: ExpressionParser

Parse the expression string and return an Expression object that can be used for repeated evaluation.

Examples:

     3 + 4
     name.firstName
 

Specified by:

parseExpression in interface ExpressionParser

Parameters:

expressionString - the raw expression string to parse

Returns:

an Expression for the parsed expression

Throws:

ParseException - if an exception occurred during parsing

parseExpression

public Expression parseExpression(String expressionString,
 @Nullable
 ParserContext context)
                           throws ParseException

Description copied from interface: ExpressionParser

Parse the expression string and return an Expression object that can be used for repeated evaluation.

Examples:

     3 + 4
     name.firstName
 

Specified by:

parseExpression in interface ExpressionParser

Parameters:

expressionString - the raw expression string to parse

context - a context for influencing the expression parsing routine

Returns:

an Expression for the parsed expression

Throws:

ParseException - if an exception occurred during parsing

doParseExpression

protected abstract Expression doParseExpression(String expressionString,
 @Nullable
 ParserContext context)
                                         throws ParseException

Actually parse the expression string and return an Expression object.

Parameters:

expressionString - the raw expression string to parse

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

Returns:

an evaluator for the parsed expression

Throws:

ParseException - if an exception occurred during parsing