Package org.zkoss.zel

Class TypeConverter

java.lang.Object

org.zkoss.zel.ELResolver

org.zkoss.zel.TypeConverter

public abstract class TypeConverter
extends ELResolver

Since:

EL 3.0

Field Summary

Fields inherited from class org.zkoss.zel.ELResolver

RESOLVABLE_AT_DESIGN_TIME, TYPE

Constructor Summary

Constructors

Constructor	Description
TypeConverter()

Method Summary

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

Methods inherited from class org.zkoss.zel.ELResolver

invoke

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeConverter

public TypeConverter()

Method Detail

getValue

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

getType

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

Specified by:

getFeatureDescriptors in class ELResolver

getCommonPropertyType

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

Specified by:

getCommonPropertyType in class ELResolver

convertToType

public abstract java.lang.Object convertToType(ELContext context,
                                               java.lang.Object obj,
                                               java.lang.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