javax.el

Class CompositeELResolver

java.lang.Object

javax.el.ELResolver

javax.el.CompositeELResolver

Direct Known Subclasses:

JasperELResolver

public class CompositeELResolver
extends ELResolver

Field Summary

Fields inherited from class javax.el.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor and Description
CompositeELResolver()

Method Summary

Modifier and Type	Method and Description
void	add(ELResolver elResolver)
Object	convertToType(ELContext context, Object obj, Class<?> type) Converts the given object to the given type.
Class<?>	getCommonPropertyType(ELContext context, Object base)
Iterator<FeatureDescriptor>	getFeatureDescriptors(ELContext context, Object base)
Class<?>	getType(ELContext context, Object base, Object property)
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.
boolean	isReadOnly(ELContext context, Object base, Object property)
void	setValue(ELContext context, Object base, Object property, Object value)

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeELResolver

public CompositeELResolver()

Method Detail

add

public void add(ELResolver elResolver)

getValue

public Object getValue(ELContext context,
                       Object base,
                       Object property)

Specified by:

getValue in class ELResolver

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

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 ELResolver

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

Since:

EL 2.2

getType

public Class<?> getType(ELContext context,
                        Object base,
                        Object property)

Specified by:

getType in class ELResolver

Parameters:

context - The EL context for this evaluation

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

property - The property whose type is to be returned

Returns:

the type of the provided property

setValue

public void setValue(ELContext context,
                     Object base,
                     Object property,
                     Object value)

Specified by:

setValue in class ELResolver

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 set

value - The value to set the property to

isReadOnly

public boolean isReadOnly(ELContext context,
                          Object base,
                          Object property)

Specified by:

isReadOnly in class ELResolver

Parameters:

context - The EL context for this evaluation

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

property - The property to be checked for read only status

Returns:

true if the identified property is read only, otherwise false

getFeatureDescriptors

public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context,
                                                         Object base)

Specified by:

getFeatureDescriptors in class ELResolver

getCommonPropertyType

public Class<?> getCommonPropertyType(ELContext context,
                                      Object base)

Specified by:

getCommonPropertyType in class ELResolver

convertToType

public Object convertToType(ELContext context,
                            Object obj,
                            Class<?> type)

Description copied from class: ELResolver

Converts the given object to the given type. This default implementation always returns null.

Overrides:

convertToType in class ELResolver

Parameters:

context - The EL context for this evaluation

obj - The object to convert

type - The type to which the object should be converted

Returns:

Always null