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/*
* 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;
}
}
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