org.springframework.webflow.expression
Class DefaultExpressionParserFactory

java.lang.Object
  org.springframework.webflow.expression.DefaultExpressionParserFactory

public final class DefaultExpressionParserFactory
extends Object

Static factory that returns the default ExpressionParser used by Spring Web Flow. Marked final with a private constructor to prevent subclassing.

This factory employs the following algorithm when the returned ExpressionParser instance is used for the first time:

• If a Unified EL implementation is configured for the VM, make a WebFlowELExpressionParser the default.
• If no Unified EL implementation is configured and OGNL is configured, make a WebFlowOgnlExpressionParser the default.
• If neither Unified EL or OGNL are configured, throw an IllegalStateException with a nice error message.

Author:

Keith Donald, Erwin Vervaet

Method Summary

static ExpressionParser	getExpressionParser() Returns the default expression parser for Spring Web Flow.
static ExpressionParser	getExpressionParser(ConversionService conversionService) Returns the default expression parser for Spring Web Flow configured with the provided ConversionService for type conversion.

Methods inherited from class java.lang.Object

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

Method Detail

getExpressionParser

public static ExpressionParser getExpressionParser()

Returns the default expression parser for Spring Web Flow. The returned instance is a cached thread-safe object.

Returns:

the expression parser

getExpressionParser

public static ExpressionParser getExpressionParser(ConversionService conversionService)

Returns the default expression parser for Spring Web Flow configured with the provided ConversionService for type conversion. The returned instance is a thread-safe object.

Parameters:

conversionService - the conversionService

Returns:

the expression parser