Examples of org.apache.isis.applib.adapters.DefaultsProvider

org.apache.isis.applib.adapters.DefaultsProvider

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 {@link org.apache.isis.applib.annotations.Defaulted} annotation, allowing aclass 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 Parser @see EncoderDecoder @see ValueSemanticsProvider


        this.defaultsProviderClass =
            DefaultsProviderUtil.defaultsProviderOrNull(candidateEncoderDecoderClass, candidateEncoderDecoderName);
        this.dependencyInjector = dependencyInjector;
        if (isValid()) {
            final DefaultsProvider defaultsProvider =
                (DefaultsProvider) ClassUtil.newInstance(defaultsProviderClass, FacetHolder.class, holder);
            this.defaultedFacetUsingDefaultsProvider =
                new DefaultedFacetUsingDefaultsProvider(defaultsProvider, holder, getDependencyInjector());
        } else {
            this.defaultedFacetUsingDefaultsProvider = null;

Examples of org.apache.isis.applib.adapters.DefaultsProvider

Related Classes of org.apache.isis.applib.adapters.DefaultsProvider