org.nakedobjects.applib.adapters
Interface DefaultsProvider<T>

public interface DefaultsProvider<T>

Provides a mechanism for providing a default value for an object.

This interface is used in two complementary ways:

• As one option, it allows objects to take control of their own default values, by implementing directly. However, the instance is used as a factory for itself. The framework will instantiate an instance, invoke the appropriate method method, and use the returned object. The instantiated instance itself will be discarded.
• Alternatively, an implementor of this interface can be nominated in the org.nakedobjects.applib.annotations.Defaulted annotation, allowing a class that needs to have a default to indicate where its default comes from.

Whatever the class that implements this interface, it must also expose either a public no-arg constructor, or (for implementations that also are Facets) a public constructor that accepts a single FacetHolder. This constructor allows the framework to instantiate the object reflectively.

See Also:

Parser, EncoderDecoder, ValueSemanticsProvider

Method Summary

T	getDefaultValue() The default, if any (as a pojo).

Method Detail

getDefaultValue

T getDefaultValue()

The default, if any (as a pojo).