org.apache.jasper.el

Class JasperELResolver

java.lang.Object

javax.el.ELResolver

javax.el.CompositeELResolver

org.apache.jasper.el.JasperELResolver

public class JasperELResolver
extends CompositeELResolver

Jasper-specific CompositeELResolver that optimizes certain functions to avoid unnecessary resolver calls.

Field Summary

Fields inherited from class javax.el.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor and Description
JasperELResolver(List<ELResolver> appResolvers, ELResolver streamResolver)

Method Summary

Modifier and Type	Method and Description
void	add(ELResolver elResolver)
Object	getValue(ELContext context, Object base, Object property)
Object	invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) Invokes a method on the the given object.

Methods inherited from class javax.el.CompositeELResolver

convertToType, getCommonPropertyType, getFeatureDescriptors, getType, isReadOnly, setValue

Methods inherited from class java.lang.Object

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

Constructor Detail

JasperELResolver

public JasperELResolver(List<ELResolver> appResolvers,
                        ELResolver streamResolver)

Method Detail

add

public void add(ELResolver elResolver)

Overrides:

add in class CompositeELResolver

getValue

public Object getValue(ELContext context,
                       Object base,
                       Object property)
                throws NullPointerException,
                       PropertyNotFoundException,
                       ELException

Overrides:

getValue in class CompositeELResolver

Parameters:

context - The EL context for this evaluation

base - The base object on which the property is to be found

property - The property whose value is to be returned

Returns:

the value of the provided property

Throws:

NullPointerException - If the supplied context is null

PropertyNotFoundException - If the base/property combination provided to the resolver is one that the resolver can handle but no match was found or a match was found but was not readable

ELException - Wraps any exception throw whilst resolving the property

invoke

public Object invoke(ELContext context,
                     Object base,
                     Object method,
                     Class<?>[] paramTypes,
                     Object[] params)

Description copied from class: ELResolver

Invokes a method on the the given object. This default implementation always returns null.

Overrides:

invoke in class CompositeELResolver

Parameters:

context - The EL context for this evaluation

base - The base object on which the method is to be found

method - The method to invoke

paramTypes - The types of the parameters of the method to invoke

params - The parameters with which to invoke the method

Returns:

Always null