org.apache.wink.server.utils.RegistrationUtils Maven / Gradle / Ivy

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * to you under the Apache License, Version 2.0 (the
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.wink.server.utils;

import java.util.HashSet;
import java.util.Set;

import javax.servlet.ServletContext;
import javax.ws.rs.core.Application;

import org.apache.wink.common.WinkApplication;
import org.apache.wink.server.internal.RequestProcessor;

public class RegistrationUtils {

    /**
     * Registers resources and providers provided by the Application. The
     * methods adds new providers and resources and DOES NOT removes the already
     * registered.
     * 
     * @param application - application to register
     * @param servletContext - current servlet context
     */
    public static void registerApplication(Application application, ServletContext servletContext) {
        registerApplication(application, servletContext, null);
    }

    public static void registerClasses(ServletContext servletContext, Class... classes) {
        registerClasses(servletContext, null, classes);
    }

    public static void registerInstances(ServletContext servletContext, Object... instances) {
        registerInstances(servletContext, null, instances);
    }

    public static void registerInstances(ServletContext servletContext,
                                         String requestProcessorAttribute,
                                         Object... instances) {
        registerApplication(new InnerApplication(instances),
                            servletContext,
                            requestProcessorAttribute);
    }

    public static void registerClasses(ServletContext servletContext,
                                       String requestProcessorAttribute,
                                       Class... classes) {
        registerApplication(new InnerApplication(classes),
                            servletContext,
                            requestProcessorAttribute);
    }

    /**
     * Registers resources and providers provided by the Application. The
     * methods adds new providers and resources and DOES NOT removes the already
     * registered.
     * 
     * @param application - application to register
     * @param servletContext - current servlet context
     * @param requestProcessorAttribute - attribute on which the request
     *            processor is stored. It's useful, when there are multiple rest
     *            servlets in the system and each one has a request processor.
     */
    public static void registerApplication(Application application,
                                           ServletContext servletContext,
                                           String requestProcessorAttribute) {
        RequestProcessor requestProcessor =
            RequestProcessor.getRequestProcessor(servletContext, requestProcessorAttribute);
        requestProcessor.getConfiguration().addApplication(application, false);
    }

    public static class InnerApplication extends WinkApplication {

        private Set> classes   = null;
        private Set