org.glassfish.jersey.server.model.internal.ModelHelper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jaxrs-ri Show documentation

A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

There is a newer version: 3.1.9

Show newest version

/*
 * Copyright (c) 2013, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.server.model.internal;

import jakarta.ws.rs.Path;

/**
 * Common model helper methods.
 *
 * @author Michal Gajdos
 * @author Constantino Cronemberger (ccronemberger at yahoo.com.br)
 */
public final class ModelHelper {

    /**
     * Get the class in the provided resource class ancestor hierarchy that
     * is actually annotated with the {@link jakarta.ws.rs.Path @Path} annotation.
     *
     * @param resourceClass resource class.
     * @return resource class or it's ancestor that is annotated with the {@link jakarta.ws.rs.Path @Path}
     *         annotation.
     */
    public static Class getAnnotatedResourceClass(final Class resourceClass) {

        Class foundInterface = null;

        // traverse the class hierarchy to find the annotation
        // According to specification, annotation in the super-classes must take precedence over annotation in the
        // implemented interfaces
        Class cls = resourceClass;
        do {
            if (cls.isAnnotationPresent(Path.class)) {
                return cls;
            }

            // if no annotation found on the class currently traversed, check for annotation in the interfaces on this
            // level - if not already previously found
            if (foundInterface == null) {
                for (final Class i : cls.getInterfaces()) {
                    if (i.isAnnotationPresent(Path.class)) {
                        // store the interface reference in case no annotation will be found in the super-classes
                        foundInterface = i;
                        break;
                    }
                }
            }
        } while ((cls = cls.getSuperclass()) != null);

        if (foundInterface != null) {
            return foundInterface;
        }

        return resourceClass;
    }

    /**
     * Prevent instantiation.
     */
    private ModelHelper() {
        throw new AssertionError("Instantiation not allowed.");
    }
}