org.zkoss.zel
Class TypeConverter

java.lang.Object
  extended by org.zkoss.zel.ELResolver
      extended by 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
TypeConverter()
           
 
Method Summary
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


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