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 java.lang.Object
implements ExpressionParser

An expression parser that understands templates. It can be subclassed by expression parsers that do not offer first class support for templating.

Since:

3.0

Author:

Keith Donald, Juergen Hoeller, Andy Clement

Constructor Summary

Constructors

Constructor and Description
TemplateAwareExpressionParser()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

TemplateAwareExpressionParser

public TemplateAwareExpressionParser()

Method Detail

parseExpression

public Expression parseExpression(java.lang.String expressionString)
                           throws ParseException

Description copied from interface: ExpressionParser

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

Some examples:

     3 + 4
     name.firstName
 

Specified by:

parseExpression in interface ExpressionParser

Parameters:

expressionString - the raw expression string to parse

Returns:

an evaluator for the parsed expression

Throws:

ParseException - an exception occurred during parsing

parseExpression

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

Description copied from interface: ExpressionParser

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

Some examples:

     3 + 4
     name.firstName
 

Specified by:

parseExpression in interface ExpressionParser

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 - an exception occurred during parsing

doParseExpression

protected abstract Expression doParseExpression(java.lang.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 - an exception occurred during parsing