AwtRectanglePersistenceDelegate Class Reference

Inherits java::beans::DefaultPersistenceDelegate.

List of all members.

Protected Member Functions
boolean	mutatesTo (Object o1, Object o2)
	Determines whether one object mutates to the other object.
void	initialize (Class<?> type, Object oldInstance, Object newInstance, Encoder enc)
	Initializes the new instance in the new environment so that it becomes equivalent with the old one, meanwhile recording this process in the encoder.
Expression	instantiate (Object oldInstance, Encoder enc)
	Returns an expression that represents a call to the bean's constructor.

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Member Function Documentation

boolean mutatesTo	(	Object	o1,
		Object	o2
	)			[protected]

Determines whether one object mutates to the other object.

If this DefaultPersistenceDelegate is constructed with one or more property names, and the class of o1 overrides the "equals(Object)" method, then o2 is considered to mutate to o1 if o1 equals to o2. Otherwise, the result is the same as the definition in PersistenceDelegate.

Parameters:

	o1	one object
	o2	the other object

Returns:

true if second object mutates to the first object, otherwise false

Reimplemented from DefaultPersistenceDelegate.

void initialize	(	Class<?>	type,
		Object	oldInstance,
		Object	newInstance,
		Encoder	enc
	)			[protected]

Initializes the new instance in the new environment so that it becomes equivalent with the old one, meanwhile recording this process in the encoder.

This is done by inspecting each property of the bean. The property value from the old bean instance and the value from the new bean instance are both retrieved and examined to see whether the latter mutates to the former, and if not, issue a call to the write method to set the equivalent value for the new instance. Exceptions occured during this process are reported to the exception listener of the encoder.

Parameters:

	type	the type of the bean
	oldInstance	the original bean object to be recorded
	newInstance	the simmulating new bean object to be initialized
	enc	the encoder to write the outputs to

Reimplemented from DefaultPersistenceDelegate.

Expression instantiate	(	Object	oldInstance,
		Encoder	enc
	)			[protected, virtual]

Returns an expression that represents a call to the bean's constructor.

The constructor may take zero or more parameters, as specified when this DefaultPersistenceDelegate is constructed.

Parameters:

	oldInstance	the old instance
	enc	the encoder that wants to record the old instance

Returns:

an expression for instantiating an object of the same type as the old instance

Reimplemented from DefaultPersistenceDelegate.