Class ResourceBundleELResolver

Constructor Detail

• ResourceBundleELResolver

  public ResourceBundleELResolver()

Method Detail

• getValue

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

  If the base object is an instance of ResourceBundle, the provided property will first be coerced to a String. The Object returned by getObject on the base ResourceBundle will be returned.

  If the base is ResourceBundle, the propertyResolved property of the ELContext object must be set to true by this resolver, before returning. 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 - The ResourceBundle to analyze.

  property - The name of the property to analyze. Will be coerced to a String.

  Returns:

  If the propertyResolved property of ELContext was set to true, then null if property is null; otherwise the Object for the given key (property coerced to String) from the ResourceBundle. If no object for the given key can be found, then the String "???" + key + "???".

  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<?> getType(ELContext context,
                          Object base,
                          Object property)

  If the base object is an instance of ResourceBundle, return null, since the resolver is read only.

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

  Specified by:

  getType in class ELResolver

  Parameters:

  context - The context of this evaluation.

  base - The ResourceBundle to analyze.

  property - The name of the property to analyze.

  Returns:

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

  Throws:

  NullPointerException - if context is null

• setValue

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

  If the base object is a ResourceBundle, throw a PropertyNotWritableException.

  Specified by:

  setValue in class ELResolver

  Parameters:

  context - The context of this evaluation.

  base - The ResourceBundle to be modified. Only bases that are of type ResourceBundle are handled.

  property - The String property to use.

  value - The value to be set.

  Throws:

  NullPointerException - if context is null.

  PropertyNotWritableException - Always thrown if base is an instance of ReasourceBundle.

• isReadOnly

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

  If the base object is not null and an instanceof ResourceBundle, return true.

  Specified by:

  isReadOnly in class ELResolver

  Parameters:

  context - The context of this evaluation.

  base - The ResourceBundle to be modified. Only bases that are of type ResourceBundle are handled.

  property - The String property to use.

  Returns:

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

  Throws:

  NullPointerException - if context is null

• getFeatureDescriptors

  public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context,
                                                           Object base)

  If the base object is a ResourceBundle, returns an Iterator containing the set of keys available in the ResourceBundle. Otherwise, returns null.

  The Iterator returned must contain zero or more instances of FeatureDescriptor. Each info object contains information about a key in the ResourceBundle, and is initialized as follows:

  displayName - The String key

  name - Same as displayName property.

  shortDescription - Empty string

  expert - false

  hidden - false

  preferred - true

  In addition, the following named attributes must be set in the returned FeatureDescriptors:

  ELResolver.TYPE - String.class

  ELResolver.RESOLVABLE_AT_DESIGN_TIME - true

  Specified by:

  getFeatureDescriptors in class ELResolver

  Parameters:

  context - The context of this evaluation.

  base - The bundle whose keys are to be iterated over. Only bases of type ResourceBundle are handled by this resolver.

  Returns:

  An Iterator containing zero or more (possibly infinitely more) FeatureDescriptor objects, each representing a key in this bundle, or null if the base object is not a ResourceBundle.

  See Also:

  FeatureDescriptor

• getCommonPropertyType

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

  If the base object is a ResourceBundle, returns the most general type that this resolver accepts for the property argument. Otherwise, returns null.

  Assuming the base is a ResourceBundle, this method will always return String.class.

  Specified by:

  getCommonPropertyType in class ELResolver

  Parameters:

  context - The context of this evaluation.

  base - The bundle to analyze. Only bases of type ResourceBundle are handled by this resolver.

  Returns:

  null if base is not a ResourceBundle; otherwise String.class.