Package jakarta.el

Class TypeConverter

java.lang.Object
jakarta.el.ELResolver
jakarta.el.TypeConverter

public abstract class TypeConverter extends ELResolver
Since:
EL 3.0
  • Constructor Details

    • TypeConverter

      public TypeConverter()
  • Method Details

    • getValue

      public Object getValue(ELContext context, Object base, Object property)
      Description copied from class: ELResolver
      Obtain the value of the given property on the given object using the given context.
      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 Class<?> getType(ELContext context, Object base, Object property)
      Description copied from class: ELResolver
      Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.
      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 most general type that maybe used to set the provided property or null if the resolver is read-only.
    • setValue

      public void setValue(ELContext context, Object base, Object property, Object value)
      Description copied from class: ELResolver
      Set the value of the given property on the given object using the given context.
      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, Object base, Object property)
      Description copied from class: ELResolver
      Determine if the given property on the given object is read-only using the given context.
      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

      @Deprecated(forRemoval=true, since="EL 5.0") public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base)
      Deprecated, for removal: This API element is subject to removal in a future version.
      Description copied from class: ELResolver
      Obtain the feature descriptors for the resolvable properties of the given object.

      The default implementation returns null.

      Overrides:
      getFeatureDescriptors in class 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<?> getCommonPropertyType(ELContext context, Object base)
      Description copied from class: ELResolver
      Obtain the most common type that is acceptable for the given base object.
      Specified by:
      getCommonPropertyType in class ELResolver
      Parameters:
      context - The context in which the examination takes place
      base - The object to examine
      Returns:
      {code null} if the most common type cannot be determine, otherwise the most common type
    • convertToType

      public abstract <T> T convertToType(ELContext context, Object obj, Class<T> 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
      Type Parameters:
      T - The type to which the object should be converted
      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