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

import javax.ws.rs.Path;

/**
 * Common model helper methods.
 *
 * @author Michal Gajdos (michal.gajdos at oracle.com)
 */
public final class ModelHelper {

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

        for (Class i : resourceClass.getInterfaces()) {
            if (i.isAnnotationPresent(Path.class)) {
                return i;
            }
        }

        return resourceClass;
    }

    /**
     * Prevent instantiation.
     */
    private ModelHelper() {
    }
}