Package jakarta.el

Class BeanELResolver

java.lang.Object

jakarta.el.ELResolver

jakarta.el.BeanELResolver

public class BeanELResolver
extends ELResolver

Standard ELResolver for working with JavaBeans.

Constructor Summary

Constructors

Constructor	Description
BeanELResolver()	Creates a writable instance of the standard JavaBean resolver.
BeanELResolver(boolean readOnly)	Creates an instance of the standard JavaBean resolver.

Method Summary

Modifier and Type	Method	Description
Class<?>	getCommonPropertyType(ELContext context, Object base)	Obtain the most common type that is acceptable for the given base object.
Class<?>	getType(ELContext context, Object base, Object property)	Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.
Object	getValue(ELContext context, Object base, Object property)	Obtain the value of the given property on the given object using the given context.
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)	Determine if the given property on the given object is read-only using the given context.
void	setValue(ELContext context, Object base, Object property, Object value)	Set the value of the given property on the given object using the given context.

Methods inherited from class jakarta.el.ELResolver

convertToType

Methods inherited from class java.lang.Object

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

Constructor Details

BeanELResolver

public BeanELResolver()

Creates a writable instance of the standard JavaBean resolver.

BeanELResolver

public BeanELResolver(boolean readOnly)

Creates an instance of the standard JavaBean resolver.

Parameters:

readOnly - true if the created instance should be read-only otherwise false.

Method Details

getType

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

Description copied from class: ELResolver

Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.

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 most general type that maybe used to set the provided property or null if the resolver is read-only.

getValue

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

Description copied from class: ELResolver

Obtain the value of the given property on the given object using the given context.

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

setValue

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

Description copied from class: ELResolver

Set the value of the given property on the given object using the given context.

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

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.

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:

This default implementation always returns null

isReadOnly

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

Description copied from class: ELResolver

Determine if the given property on the given object is read-only using the given context.

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

getCommonPropertyType

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

Description copied from class: ELResolver

Obtain the most common type that is acceptable for the given base object.

Specified by:

getCommonPropertyType in class ELResolver

Parameters:

context - The context in which the examination takes place

base - The object to examine

Returns:

{code null} if the most common type cannot be determine, otherwise the most common type