org.springframework.binding.expression.el

Class ELExpressionParser

java.lang.Object

org.springframework.binding.expression.el.ELExpressionParser

All Implemented Interfaces:

ExpressionParser

Direct Known Subclasses:

JsfManagedBeanAwareELExpressionParser, WebFlowELExpressionParser

public class ELExpressionParser
extends java.lang.Object
implements ExpressionParser

The expression parser that parses EL expressions.

Author:

Keith Donald, Jeremy Grelle

Constructor Summary

Constructors

Constructor and Description
ELExpressionParser(javax.el.ExpressionFactory expressionFactory) Creates a new EL expression parser for standalone usage.

Method Summary

Modifier and Type	Method and Description
ConversionService	getConversionService() The conversion service to use to perform type conversions as needed by the Unified EL system.
Expression	parseExpression(java.lang.String expressionString, ParserContext context) Parse the expression string and return a compiled Expression object you can use for evaluation.
void	putContextFactory(java.lang.Class<?> contextType, ELContextFactory contextFactory) Register the ELContextFactory for expressions that evaluate the given class of context object.
void	setConversionService(ConversionService conversionService) Sets the conversion service to use to perform type conversions as needed by the Unified EL system.

Methods inherited from class java.lang.Object

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

Constructor Detail

ELExpressionParser

public ELExpressionParser(javax.el.ExpressionFactory expressionFactory)

Creates a new EL expression parser for standalone usage.

Method Detail

getConversionService

public ConversionService getConversionService()

The conversion service to use to perform type conversions as needed by the Unified EL system. If not specified, the default is an instance of DefaultConversionService.

setConversionService

public void setConversionService(ConversionService conversionService)

Sets the conversion service to use to perform type conversions as needed by the Unified EL system.

Parameters:

conversionService - the conversion service to use

putContextFactory

public void putContextFactory(java.lang.Class<?> contextType,
                              ELContextFactory contextFactory)

Register the ELContextFactory for expressions that evaluate the given class of context object.

Parameters:

contextType - the expression context class

contextFactory - the context factory to use for expressions that evaluate those types of contexts

parseExpression

public Expression parseExpression(java.lang.String expressionString,
                                  ParserContext context)
                           throws ParserException

Description copied from interface: ExpressionParser

Parse the expression string and return a compiled Expression object you can use for 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:

ParserException - an exception occurred during parsing