com.virtuosotechnologies.lib.container
Interface PropertySet

All Known Subinterfaces:

CommandNode, DatabaseController, ModifiablePropertySet, PaneController, RequestablePropertySet

All Known Implementing Classes:

AbstractCommandNode, BasicModifiablePropertySet, PseudoModifiablePropertySet, WrappingPropertySet

public interface PropertySet

A set of constrained properties. This is basically a hash table with several additional features: constraints on property values, default values, and listeners on state changes. Many applications will use the ModifiablePropertySet subinterface, which adds mutation methods.

This interface itself does not specify thread-safety semantics. The particular implementation or use in a larger interface should specify this. For example, standalone PropertySets may be fully synchronized and thread-safe. PropertySets related to AWT or Swing objects may require that all interaction be done on the AWT event thread.

Method Summary

void	addPropertySetListener(PropertySetListener listener) Add a PropertySetListener.
Object	getDefaultValue(ConstrainedKey key) Get the default value for a property.
Object	getValue(ConstrainedKey key) Get a property.
void	removePropertySetListener(PropertySetListener listener) Remove a PropertySetListener.

Method Detail

getValue

public Object getValue(ConstrainedKey key)

Get a property.

Parameters:

key - key object for the property

Returns:

value for the property

getDefaultValue

public Object getDefaultValue(ConstrainedKey key)

Get the default value for a property. Returns null if there is no default.

Parameters:

key - key object for the property

Returns:

default value for the property

addPropertySetListener

public void addPropertySetListener(PropertySetListener listener)

Add a PropertySetListener. Listeners should be added via weak references.

Parameters:

listener - new listener

removePropertySetListener

public void removePropertySetListener(PropertySetListener listener)

Remove a PropertySetListener. Does nothing if the listener is not already present.

Parameters:

listener - listener to remove