org.apache.myfaces.extensions.validator.core.el
Class DefaultELHelper

java.lang.Object
  org.apache.myfaces.extensions.validator.core.el.DefaultELHelper

All Implemented Interfaces:

ELHelper

public class DefaultELHelper
extends Object
implements ELHelper

in order to centralize the jsf version dependency within the core this el-helper supports jsp and facelets (tested with 1.1.14)

Since:

1.x.1

Field Summary

protected Logger	logger
protected boolean	projectStageDevelopment

Constructor Summary

DefaultELHelper()

Method Summary

Object	getBean(String beanName) Resolves the bean instance for the specified name.
Object	getBindingOfComponent(javax.faces.component.UIComponent uiComponent, String name) Gets the value of the attribute specified by the parameter name for the UIComponent.
PropertyDetails	getPropertyDetailsOfValueBinding(javax.faces.component.UIComponent uiComponent) Extracts the property details (expression, base object and property name) information of the value attribute of the given UIComponent value attribute.
protected PropertyDetails	getPropertyDetailsViaReflectionFallback(javax.faces.component.UIComponent uiComponent)
Class	getTypeOfExpression(javax.faces.context.FacesContext facesContext, ValueBindingExpression valueBindingExpression) Evaluates the type returned by ELHelper.getValueOfExpression(javax.faces.context.FacesContext, org.apache.myfaces.extensions.validator.core.el.ValueBindingExpression)
Object	getValueOfExpression(javax.faces.context.FacesContext facesContext, ValueBindingExpression valueBindingExpression) Evaluates the given expression within the current FacesContext
boolean	isELTermValid(javax.faces.context.FacesContext facesContext, String valueBindingExpression) Determines if the expression is a valid expression, meaning that the expression can be evaluated without an exception.
boolean	isELTermWellFormed(Object o) A very basic check of the EL expression

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Logger logger

projectStageDevelopment

protected final boolean projectStageDevelopment

Constructor Detail

DefaultELHelper

public DefaultELHelper()

Method Detail

getTypeOfExpression

public Class getTypeOfExpression(javax.faces.context.FacesContext facesContext,
                                 ValueBindingExpression valueBindingExpression)

Description copied from interface: ELHelper

Evaluates the type returned by ELHelper.getValueOfExpression(javax.faces.context.FacesContext, org.apache.myfaces.extensions.validator.core.el.ValueBindingExpression)

Specified by:

getTypeOfExpression in interface ELHelper

Parameters:

facesContext - FacesContext for the current request

valueBindingExpression - value-binding to evaluate

Returns:

type of the result of the expression

getBean

public Object getBean(String beanName)

Description copied from interface: ELHelper

Resolves the bean instance for the specified name.

Specified by:

getBean in interface ELHelper

Parameters:

beanName - The bean name we are interested in, no EL expression.

Returns:

instance for the bean name or null.

getValueOfExpression

public Object getValueOfExpression(javax.faces.context.FacesContext facesContext,
                                   ValueBindingExpression valueBindingExpression)

Description copied from interface: ELHelper

Evaluates the given expression within the current FacesContext

Specified by:

getValueOfExpression in interface ELHelper

Parameters:

facesContext - FacesContext for the current request

valueBindingExpression - value-binding to evaluate

Returns:

result for the given expression

isELTermValid

public boolean isELTermValid(javax.faces.context.FacesContext facesContext,
                             String valueBindingExpression)

Description copied from interface: ELHelper

Determines if the expression is a valid expression, meaning that the expression can be evaluated without an exception.

Specified by:

isELTermValid in interface ELHelper

Parameters:

facesContext - The JSF Context

valueBindingExpression - The EL expression we want to evaluate.

Returns:

true if the expression is valid - false otherwise

getPropertyDetailsOfValueBinding

public PropertyDetails getPropertyDetailsOfValueBinding(javax.faces.component.UIComponent uiComponent)

Description copied from interface: ELHelper

Extracts the property details (expression, base object and property name) information of the value attribute of the given UIComponent value attribute.

Specified by:

getPropertyDetailsOfValueBinding in interface ELHelper

Parameters:

uiComponent - The UIComponent in question

Returns:

property details for the value of the given UIComponent

getPropertyDetailsViaReflectionFallback

protected PropertyDetails getPropertyDetailsViaReflectionFallback(javax.faces.component.UIComponent uiComponent)

isELTermWellFormed

public boolean isELTermWellFormed(Object o)

Description copied from interface: ELHelper

A very basic check of the EL expression

Specified by:

isELTermWellFormed in interface ELHelper

Parameters:

o - Object in question

Returns:

true if the given object is a well formed string - false otherwise

getBindingOfComponent

public Object getBindingOfComponent(javax.faces.component.UIComponent uiComponent,
                                    String name)

Description copied from interface: ELHelper

Gets the value of the attribute specified by the parameter name for the UIComponent.

Specified by:

getBindingOfComponent in interface ELHelper

Parameters:

uiComponent - The UIComponent in question

name - The name of the attribute.

Returns:

The ValueExpression assigned to the attribute.