| /* |
| * The contents of this file are subject to the terms |
| * of the Common Development and Distribution License |
| * (the "License"). You may not use this file except |
| * in compliance with the License. |
| * |
| * You can obtain a copy of the license at |
| * http://www.opensource.org/licenses/cddl1.php |
| * See the License for the specific language governing |
| * permissions and limitations under the License. |
| */ |
| |
| package javax.ws.rs.core; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** |
| * Defines the components of a JAX-RS application and supplies additional |
| * metadata. A JAX-RS application or implementation supplies a concrete |
| * subclass of this abstract class. |
| * |
| * <p>The implementation-created instance of an Application subclass may be |
| * injected into resource classes and providers using |
| * {@link javax.ws.rs.core.Context}.<p> |
| * |
| */ |
| public class Application { |
| private static final Set<Object> emptyObjectSet = Collections.emptySet(); |
| private static final Set<Class<?>> emptyClassSet = Collections.emptySet(); |
| |
| /** |
| * Get a set of root resource and provider classes. The default lifecycle |
| * for resource class instances is per-request. The default lifecycle for |
| * providers is singleton. |
| * |
| * <p>Implementations should warn about and ignore classes that do not |
| * conform to the requirements of root resource or provider classes. |
| * Implementations should warn about and ignore classes for which |
| * {@link #getSingletons()} returns an instance. Implementations MUST |
| * NOT modify the returned set.</p> |
| * |
| * <p>The default implementation returns an empty set.</p> |
| * |
| * @return a set of root resource and provider classes. Returning null |
| * is equivalent to returning an empty set. |
| */ |
| public Set<Class<?>> getClasses() { |
| return emptyClassSet; |
| } |
| |
| /** |
| * Get a set of root resource and provider instances. Fields and properties |
| * of returned instances are injected with their declared dependencies |
| * (see {@link Context}) by the runtime prior to use. |
| * |
| * <p>Implementations should warn about and ignore classes that do not |
| * conform to the requirements of root resource or provider classes. |
| * Implementations should flag an error if the returned set includes |
| * more than one instance of the same class. Implementations MUST |
| * NOT modify the returned set.</p> |
| * |
| * <p>The default implementation returns an empty set.</p> |
| * |
| * @return a set of root resource and provider instances. Returning null |
| * is equivalent to returning an empty set. |
| */ |
| public Set<Object> getSingletons() { |
| return emptyObjectSet; |
| } |
| |
| } |