Package jakarta.servlet.jsp.el

Class ImportELResolver

java.lang.Object

jakarta.el.ELResolver

jakarta.servlet.jsp.el.ImportELResolver

public class ImportELResolver
extends ELResolver

Defines variable resolution behavior for Class imports and static imports.

Since:

JSP 3.1

Field Summary

Fields inherited from class jakarta.el.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor	Description
ImportELResolver()

Method Summary

Modifier and Type	Method	Description
Class<String>	getCommonPropertyType(ELContext context, Object base)	Always returns null since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.getCommonPropertyType(ELContext, Object).
Class<Object>	getType(ELContext context, Object base, Object property)	Always returns null since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.getType(ELContext, Object, Object).
Object	getValue(ELContext context, Object base, Object property)	If the base object is null, searches the Class and static imports for an import with the given name and returns it if an import exists with the given name.
boolean	isReadOnly(ELContext context, Object base, Object property)	Always returns false since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.isReadOnly(ELContext, Object, Object).
void	setValue(ELContext context, Object base, Object property, Object val)	Always a NO-OP since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.setValue(ELContext, Object, Object, Object).

Methods inherited from class jakarta.el.ELResolver

convertToType, getFeatureDescriptors, invoke

Methods inherited from class java.lang.Object

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

Constructor Detail

ImportELResolver

public ImportELResolver()

Method Detail

getValue

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

If the base object is null, searches the Class and static imports for an import with the given name and returns it if an import exists with the given name.

The propertyResolved property of the ELContext object must be set to true by this resolver before returning if an import is matched. If this property is not true after this method is called, the caller should ignore the return value.

Specified by:

getValue in class ELResolver

Parameters:

context - The context of this evaluation.

base - Only null is handled by this resolver. Other values will result in an immediate return.

property - The name of the import to resolve.

Returns:

If the propertyResolved property of ELContext was set to true, then the import; otherwise undefined.

Throws:

NullPointerException - if context is null

ELException - if an exception was thrown while performing the property or variable resolution. The thrown exception must be included as the cause property of this exception, if available.

getType

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

Always returns null since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.getType(ELContext, Object, Object).

Specified by:

getType in class ELResolver

Parameters:

context - The context of this evaluation.

base - Ignored

property - Ignored

Returns:

Always null

Throws:

NullPointerException - if context is null

ELException - if an exception was thrown while performing the property or variable resolution. The thrown exception must be included as the cause property of this exception, if available.

setValue

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

Always a NO-OP since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.setValue(ELContext, Object, Object, Object).

Specified by:

setValue in class ELResolver

Parameters:

context - The context of this evaluation.

base - Ignored

property - Ignored

val - Ignored

Throws:

NullPointerException - if context is null.

ELException - if an exception was thrown while performing the property or variable resolution. The thrown exception must be included as the cause property of this exception, if available.

isReadOnly

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

Always returns false since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.isReadOnly(ELContext, Object, Object).

Specified by:

isReadOnly in class ELResolver

Parameters:

context - The context of this evaluation.

base - Ignored

property - Ignored

Returns:

Always false

Throws:

NullPointerException - if context is null.

ELException - if an exception was thrown while performing the property or variable resolution. The thrown exception must be included as the cause property of this exception, if available.

getCommonPropertyType

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

Always returns null since in normal usage ScopedAttributeELResolver will handle calls to ELResolver.getCommonPropertyType(ELContext, Object).

Specified by:

getCommonPropertyType in class ELResolver

Parameters:

context - Ignored

base - Ignored

Returns:

Always null