Package jakarta.servlet.jsp.el

Class NotFoundELResolver

java.lang.Object

jakarta.el.ELResolver

jakarta.servlet.jsp.el.NotFoundELResolver

public class NotFoundELResolver
extends jakarta.el.ELResolver

The final resolver of the Jakarta Pages ELResolver chain. It always resolves the requested value, returning null when it does so.

Since:

JSP 3.1

Field Summary

Fields inherited from class jakarta.el.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor	Description
NotFoundELResolver()	Default constructor.

Method Summary

Modifier and Type	Method	Description
Class<String>	getCommonPropertyType(jakarta.el.ELContext context, Object base)	Obtain the most common type that is acceptable for the given base object.
Iterator<FeatureDescriptor>	getFeatureDescriptors(jakarta.el.ELContext context, Object base)	Deprecated, for removal: This API element is subject to removal in a future version.
Class<Object>	getType(jakarta.el.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(jakarta.el.ELContext context, Object base, Object property)	Obtain the value of the given property on the given object using the given context.
boolean	isReadOnly(jakarta.el.ELContext context, Object base, Object property)	Determine if the given property on the given object is read-only using the given context.
void	setValue(jakarta.el.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, invoke

Methods inherited from class java.lang.Object

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

Constructor Details

NotFoundELResolver

public NotFoundELResolver()

Default constructor.

Method Details

getValue

public Object getValue(jakarta.el.ELContext context,
 Object base,
 Object property)

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

Resolves the property and always returns null unless the provided context contains a Boolean object with value Boolean.TRUE as the value associated with the key jakarta.servlet.jsp.el.NotFoundELResolver.class in which case an exception is thrown. This is to support implementation of the errorOnELNotFound page/tag directive.

Specified by:

getValue in class jakarta.el.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:

Always null

Throws:

jakarta.el.PropertyNotFoundException - if the provided context contains a Boolean object with value Boolean.TRUE as the value associated with the key jakarta.servlet.jsp.el.NotFoundELResolver.class

getType

public Class<Object> getType(jakarta.el.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.

In normal usage, ScopedAttributeELResolver will have responded.

Specified by:

getType in class jakarta.el.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:

Always null

setValue

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

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

No-op. In normal usage, ScopedAttributeELResolver will have responded.

Specified by:

setValue in class jakarta.el.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(jakarta.el.ELContext context,
 Object base,
 Object property)

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

In normal usage, ScopedAttributeELResolver will have responded.

Specified by:

isReadOnly in class jakarta.el.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:

Always false

getFeatureDescriptors

@Deprecated(forRemoval=true,
            since="JSP 3.1")
public Iterator<FeatureDescriptor> getFeatureDescriptors(jakarta.el.ELContext context,
 Object base)

Deprecated, for removal: This API element is subject to removal in a future version.

Description copied from class: jakarta.el.ELResolver

Obtain the feature descriptors for the resolvable properties of the given object.

The default implementation returns null.

Overrides:

getFeatureDescriptors in class jakarta.el.ELResolver

Parameters:

context - The context in which the examination takes place

base - The object to examine

Returns:

An iterator, possibly empty, of feature descriptors of the given object

getCommonPropertyType

public Class<String> getCommonPropertyType(jakarta.el.ELContext context,
 Object base)

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

In normal usage, ScopedAttributeELResolver will have responded.

Specified by:

getCommonPropertyType in class jakarta.el.ELResolver

Parameters:

context - The context in which the examination takes place

base - The object to examine

Returns:

Always null