javax.servlet.jsp.el

Class ScopedAttributeELResolver

java.lang.Object

javax.el.ELResolver

javax.servlet.jsp.el.ScopedAttributeELResolver

public class ScopedAttributeELResolver
extends ELResolver

Variable resolution for scoped attributes.

Since:

2.1

Field Summary

Fields inherited from class javax.el.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor and Description
ScopedAttributeELResolver()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Class<java.lang.String>	getCommonPropertyType(ELContext context, java.lang.Object base) Returns String.class if the base argument is null.
java.util.Iterator<java.beans.FeatureDescriptor>	getFeatureDescriptors(ELContext context, java.lang.Object base) If the base argument is null, returns an iterator of FeatureDescriptors containing information about each scoped attribute in the context.
java.lang.Class	getType(ELContext context, java.lang.Object base, java.lang.Object property) If the base argument is null, returns Object.class, otherwise returns null.
java.lang.Object	getValue(ELContext context, java.lang.Object base, java.lang.Object property) If the base object is null, returns the value of the specified attribute within the context.
boolean	isReadOnly(ELContext context, java.lang.Object base, java.lang.Object property) Scoped attributes are not read only, so returns false.
void	setValue(ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value) If the base argument is null, sets the specified attribute in the context to the specified value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScopedAttributeELResolver

public ScopedAttributeELResolver()

Method Detail

getValue

public java.lang.Object getValue(ELContext context,
                        java.lang.Object base,
                        java.lang.Object property)

If the base object is null, returns the value of the specified attribute within the context. Otherwise returns null.

Specified by:

getValue in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation

property - the property of the base object

getType

public java.lang.Class getType(ELContext context,
                      java.lang.Object base,
                      java.lang.Object property)

If the base argument is null, returns Object.class, otherwise returns null.

Specified by:

getType in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation

property - the property of the base object

setValue

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

If the base argument is null, sets the specified attribute in the context to the specified value. If the attribute does not yet exist it will be created with page scope.

Specified by:

setValue in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation

property - the property of the base object

value - the new value of the property

isReadOnly

public boolean isReadOnly(ELContext context,
                 java.lang.Object base,
                 java.lang.Object property)

Scoped attributes are not read only, so returns false.

Specified by:

isReadOnly in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation

property - the property of the base object

getFeatureDescriptors

public java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors(ELContext context,
                                                                     java.lang.Object base)

If the base argument is null, returns an iterator of FeatureDescriptors containing information about each scoped attribute in the context. Otherwise return null.

Specified by:

getFeatureDescriptors in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation

getCommonPropertyType

public java.lang.Class<java.lang.String> getCommonPropertyType(ELContext context,
                                                      java.lang.Object base)

Returns String.class if the base argument is null.

Specified by:

getCommonPropertyType in class ELResolver

Parameters:

context - the evaluation context

base - the target of the operation