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package javax.ws.rs.core;

/**
 * A feature extension contract.
 *
 * Typically encapsulates a concept or facility that involves configuration of multiple providers
 * (e.g. filters or interceptors) and/or properties.
 * 

* A {@code Feature} is a special type of JAX-RS configuration meta-provider. Once a feature is registered, * it's {@link #configure(FeatureContext)} method is invoked during JAX-RS runtime configuration and bootstrapping * phase allowing the feature to further configure the runtime context in which it has been registered. * From within the invoked {@code configure(...)} method a feature may provide additional runtime configuration * for the facility or conceptual domain it represents, such as registering additional contract providers, * including nested features and/or specifying domain-specific properties. *

* * @author Marek Potociar * @since 2.0 */ public interface Feature { /** * A call-back method called when the feature is to be enabled in a given * runtime configuration scope. * * The responsibility of the feature is to properly update the supplied runtime configuration context * and return {@code true} if the feature was successfully enabled or {@code false} otherwise. *

* Note that under some circumstances the feature may decide not to enable itself, which * is indicated by returning {@code false}. In such case the configuration context does * not add the feature to the collection of enabled features and a subsequent call to * {@link Configuration#isEnabled(Feature)} or {@link Configuration#isEnabled(Class)} method * would return {@code false}. *

* * @param context configurable context in which the feature should be enabled. * @return {@code true} if the feature was successfully enabled, {@code false} * otherwise. */ public boolean configure(FeatureContext context); }




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