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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.

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
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 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
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package org.glassfish.jersey.server;

import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.ws.rs.RuntimeType;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Configurable;
import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.Feature;

import org.glassfish.jersey.internal.Errors;
import org.glassfish.jersey.internal.util.PropertiesHelper;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.internal.util.Tokenizer;
import org.glassfish.jersey.model.ContractProvider;
import org.glassfish.jersey.model.internal.CommonConfig;
import org.glassfish.jersey.model.internal.ComponentBag;
import org.glassfish.jersey.process.Inflector;
import org.glassfish.jersey.process.internal.RequestScoped;
import org.glassfish.jersey.server.internal.LocalizationMessages;
import org.glassfish.jersey.server.internal.scanning.AnnotationAcceptingListener;
import org.glassfish.jersey.server.internal.scanning.FilesScanner;
import org.glassfish.jersey.server.internal.scanning.PackageNamesScanner;
import org.glassfish.jersey.server.model.Resource;

import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.Binder;

import com.google.common.base.Predicate;
import com.google.common.collect.Sets;

/**
 * The resource configuration for configuring a web application.
 *
 * @author Paul Sandoz
 * @author Martin Matula (martin.matula at oracle.com)
 * @author Michal Gajdos (michal.gajdos at oracle.com)
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
public class ResourceConfig extends Application implements Configurable, ServerConfig {

    private static final Logger LOGGER = Logger.getLogger(ResourceConfig.class.getName());

    private transient Set> cachedClasses = null;
    private transient Set> cachedClassesView = null;
    private transient Set cachedSingletons = null;
    private transient Set cachedSingletonsView = null;

    private volatile State state;

    private static class State extends CommonConfig implements ServerConfig {

        private final Set resourceFinders;

        private final Set resources;
        private final Set resourcesView;

        private volatile ClassLoader classLoader = null;

        public State() {
            super(RuntimeType.SERVER, ComponentBag.INCLUDE_ALL);
            this.classLoader = ReflectionHelper.getContextClassLoader();

            this.resourceFinders = Sets.newHashSet();

            this.resources = Sets.newHashSet();
            this.resourcesView = Collections.unmodifiableSet(this.resources);
        }

        public State(State original) {
            super(original);
            this.classLoader = original.classLoader;

            this.resources = Sets.newHashSet(original.resources);
            this.resourcesView = Collections.unmodifiableSet(this.resources);

            this.resourceFinders = Sets.newHashSet(original.resourceFinders);
        }

        public void setClassLoader(ClassLoader classLoader) {
            this.classLoader = classLoader;
        }

        public void registerResources(Set resources) {
            this.resources.addAll(resources);
        }

        public void registerFinder(ResourceFinder resourceFinder) {
            this.resourceFinders.add(resourceFinder);
        }

        @Override
        protected Inflector getModelEnhancer(final Class componentClass) {
            return new Inflector() {
                @Override
                public ContractProvider apply(ContractProvider.Builder builder) {
                    if (builder.getScope() == null && builder.getContracts().isEmpty() &&
                            Resource.getPath(componentClass) != null) {
                        builder.scope(RequestScoped.class);
                    }

                    return builder.build();
                }
            };

        }

        @Override
        public State loadFrom(Configuration config) {
            super.loadFrom(config);
            this.resourceFinders.clear();
            this.resources.clear();

            State other = null;
            if (config instanceof ResourceConfig) {
                other = ((ResourceConfig) config).state;
            }
            if (config instanceof State) {
                other = (State) config;
            }

            if (other != null) {
                this.resourceFinders.addAll(other.resourceFinders);
                this.resources.addAll(other.resources);
            }

            return this;
        }

        @Override
        public final Set getResources() {
            return resourcesView;
        }

        @Override
        public ServerConfig getConfiguration() {
            return this;
        }

        /**
         * Get the registered resource finders.
         *
         * @return registered resource finders.
         */
        public Set getResourceFinders() {
            return resourceFinders;
        }

        /**
         * Get resource and provider class loader.
         *
         * @return class loader to be used when looking up the resource classes and providers.
         */
        public ClassLoader getClassLoader() {
            return classLoader;
        }
    }

    private static final class ImmutableState extends State {
        private ImmutableState(State original) {
            super(original);
        }

        @Override
        public void setClassLoader(ClassLoader classLoader) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public void registerResources(Set resources) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public void registerFinder(ResourceFinder resourceFinder) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State addProperties(Map properties) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State property(String name, Object value) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Class componentClass) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Class componentClass, int bindingPriority) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Class componentClass, Class... contracts) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Class componentClass, Map, Integer> contracts) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Object component) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Object component, int bindingPriority) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Object component, Class... contracts) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State register(Object component, Map, Integer> contracts) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public State setProperties(Map properties) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public void configureAutoDiscoverableProviders(final ServiceLocator locator) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }

        @Override
        public void configureMetaProviders(ServiceLocator locator) {
            throw new IllegalStateException(LocalizationMessages.RC_NOT_MODIFIABLE());
        }
    }

    /**
     * Returns a {@code ResourceConfig} instance for the supplied application.
     *
     * If the application is an instance of {@code ResourceConfig} the method returns defensive copy of the resource config.
     * Otherwise it creates a new {@code ResourceConfig} from the application.
     *
     * @param application Application to provide the {@code ResourceConfig} instance for.
     * @return ResourceConfig instance for the supplied application.
     */
    public static ResourceConfig forApplication(Application application) {
        return (application instanceof ResourceConfig) ? ((ResourceConfig) application) : new WrappingResourceConfig
                (application, null, null);
    }

    /**
     * Returns a {@code ResourceConfig} instance wrapping the application of the supplied class.
     *
     * @param applicationClass Class representing a JAX-RS application.
     * @return ResourceConfig wrapping the JAX-RS application defined by the supplied class.
     */
    public static ResourceConfig forApplicationClass(Class applicationClass) {
        return new WrappingResourceConfig(null, applicationClass, null);
    }

    /**
     * Returns a {@code ResourceConfig} instance wrapping the application of the supplied class.
     *
     * This method provides an option of supplying the set of classes that should be returned from {@link #getClasses()}
     * method if the application defined by the supplied application class returns empty sets from {@link javax.ws.rs.core
     * .Application#getClasses()}
     * and {@link javax.ws.rs.core.Application#getSingletons()} methods.
     *
     * @param applicationClass Class representing a JAX-RS application.
     * @param defaultClasses   Default set of classes that should be returned from {@link #getClasses()} if the underlying
     *                         application does not provide any classes and singletons.
     * @return ResourceConfig wrapping the JAX-RS application defined by the supplied class.
     */
    public static ResourceConfig forApplicationClass(Class applicationClass,
                                                     Set> defaultClasses) {
        return new WrappingResourceConfig(null, applicationClass, defaultClasses);
    }

    /**
     * Create a new resource configuration without any custom properties or
     * resource and provider classes.
     */
    public ResourceConfig() {
        this.state = new State();
    }

    /**
     * Create a new resource configuration initialized with a given set of
     * resource/provider classes.
     *
     * @param classes application-specific resource and/or provider classes.
     */
    public ResourceConfig(Set> classes) {
        this();
        this.registerClasses(classes);
    }

    /**
     * Create a new resource configuration initialized with a given set of
     * resource/provider classes.
     *
     * @param classes application-specific resource and/or provider classes.
     */
    public ResourceConfig(Class... classes) {
        this(Sets.newHashSet(classes));
    }

    /**
     * Create a defensive resource configuration copy initialized with a given {@code ResourceConfig}.
     *
     * @param original resource configuration to create a defensive copy from.
     */
    public ResourceConfig(final ResourceConfig original) {
        this.state = new State(original.state);
    }

    /**
     * Add properties to {@code ResourceConfig}.
     *
     * If any of the added properties exists already, he values of the existing
     * properties will be replaced with new values.
     *
     * @param properties properties to add.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig addProperties(Map properties) {
        state.addProperties(properties);
        return this;
    }

    /**
     * Set new configuration properties replacing all previously set properties.
     *
     * @param properties new set of configuration properties. The content of
     *                   the map will replace any existing properties set on the configuration
     *                   instance.
     * @return the updated configuration instance.
     */
    public ResourceConfig setProperties(final Map properties) {
        state.setProperties(properties);
        return this;
    }

    @Override
    public ResourceConfig property(String name, Object value) {
        state.property(name, value);
        return this;
    }

    @Override
    public ResourceConfig register(final Class componentClass) {
        invalidateCache();
        state.register(componentClass);
        return this;
    }

    @Override
    public ResourceConfig register(final Class componentClass, final int bindingPriority) {
        invalidateCache();
        state.register(componentClass, bindingPriority);
        return this;
    }

    @Override
    public ResourceConfig register(final Class componentClass, final Class... contracts) {
        invalidateCache();
        state.register(componentClass, contracts);
        return this;
    }

    @Override
    public ResourceConfig register(final Class componentClass, final Map, Integer> contracts) {
        invalidateCache();
        state.register(componentClass, contracts);
        return this;
    }

    @Override
    public ResourceConfig register(final Object component) {
        invalidateCache();
        state.register(component);
        return this;
    }

    @Override
    public ResourceConfig register(final Object component, final int bindingPriority) {
        invalidateCache();
        state.register(component, bindingPriority);
        return this;
    }

    @Override
    public ResourceConfig register(final Object component, final Class... contracts) {
        invalidateCache();
        state.register(component, contracts);
        return this;
    }

    @Override
    public ResourceConfig register(final Object component, final Map, Integer> contracts) {
        invalidateCache();
        state.register(component, contracts);
        return this;
    }

    /**
     * Register annotated JAX-RS resource, JAX-RS or Jersey contract provider or JAX-RS feature
     * in the {@code ResourceConfig}.
     * 

     * Note that registered JAX-RS features are used to initialize and configure
     * the Jersey runtime {@link ServiceLocator} instance during application deployment, but are
     * otherwise ignored by server-side runtime, unless they implement also another contract
     * recognized by Jersey runtime.
     * 

     * 

     * Also note that registration of {@link Binder HK2 binder} classes is note supported. HK2 binders
     * must be {@link #registerInstances(Object...) registered as instances}.
     * 

     *
     * @param classes classes to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerClasses(Set> classes) {
        if (classes == null) {
            return this;
        }

        for (Class cls : classes) {
            register(cls);
        }
        return this;
    }

    /**
     * Register annotated JAX-RS resource, JAX-RS or Jersey contract provider or JAX-RS feature
     * in the {@code ResourceConfig}.
     * 

     * Note that registered JAX-RS features are used to initialize and configure
     * the Jersey runtime {@link ServiceLocator} instance during application deployment, but are
     * otherwise ignored by server-side runtime, unless they implement also another contract
     * recognized by Jersey runtime.
     * 

     * 

     * Also note that registration of {@link Binder HK2 binder} classes is note supported. HK2 binders
     * must be {@link #registerInstances(Object...) registered as instances}.
     * 

     *
     * @param classes classes to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerClasses(Class... classes) {
        if (classes == null) {
            return this;
        }

        return registerClasses(Sets.newHashSet(classes));
    }

    /**
     * Register annotated JAX-RS resource, JAX-RS or Jersey contract provider, JAX-RS feature
     * or {@link Binder HK2 binder} instances (singletons) in the {@code ResourceConfig}.
     * 

     * Note that registered HK2 binders and JAX-RS features are used to initialize and configure
     * the Jersey runtime {@link ServiceLocator} instance during application deployment, but are
     * otherwise ignored by server-side runtime, unless they implement also another contract
     * recognized by Jersey runtime.
     * 

     *
     * @param instances instances to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerInstances(Set instances) {
        if (instances == null) {
            return this;
        }

        for (Object instance : instances) {
            register(instance);
        }
        return this;
    }

    /**
     * Register annotated JAX-RS resource, JAX-RS or Jersey contract provider, JAX-RS feature
     * or {@link Binder HK2 binder} instances (singletons) in the {@code ResourceConfig}.
     * 

     * Note that registered HK2 binders and JAX-RS features are used to initialize and configure
     * the Jersey runtime {@link ServiceLocator} instance during application deployment, but are
     * otherwise ignored by server-side runtime, unless they implement also another contract
     * recognized by Jersey runtime.
     * 

     *
     * @param instances instances to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerInstances(Object... instances) {
        if (instances == null) {
            return this;
        }

        return registerInstances(Sets.newHashSet(instances));
    }

    /**
     * Register new programmatic resource models in the {@code ResourceConfig}.
     *
     * @param resources resource models to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerResources(Resource... resources) {
        if (resources == null) {
            return this;
        }

        return registerResources(Sets.newHashSet(resources));
    }

    /**
     * Register new resource models in the {@code ResourceConfig}.
     *
     * @param resources resource models to register.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerResources(Set resources) {
        if (resources == null) {
            return this;
        }

        this.state.registerResources(resources);
        return this;
    }

    /**
     * Add a {@link ResourceFinder} to {@code ResourceConfig}.
     *
     * @param resourceFinder {@link ResourceFinder}
     * @return updated resource configuration instance.
     */
    public final ResourceConfig registerFinder(ResourceFinder resourceFinder) {
        if (resourceFinder == null) {
            return this;
        }

        this.state.registerFinder(resourceFinder);
        return this;
    }

    /**
     * Set {@link ClassLoader} which will be used for resource discovery.
     *
     * @param classLoader provided {@link ClassLoader}.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig setClassLoader(ClassLoader classLoader) {
        this.state.setClassLoader(classLoader);
        return this;
    }

    /**
     * Adds array of package names which will be used to scan for components.
     *
     * Packages will be scanned recursively, including all nested packages.
     *
     * @param packages array of package names.
     * @return updated resource configuration instance.
     * @see #packages(boolean, String...)
     */
    public final ResourceConfig packages(String... packages) {
        return packages(true, packages);
    }

    /**
     * Adds array of package names which will be used to scan for components.
     *
     * @param recursive defines whether any nested packages in the collection of specified
     *                  package names should be recursively scanned (value of {@code true})
     *                  as part of the package scanning or not (value of {@code false}).
     * @param packages  array of package names.
     * @return updated resource configuration instance.
     * @see #packages(String...)
     */
    public final ResourceConfig packages(boolean recursive, String... packages) {
        if (packages == null || packages.length == 0) {
            return this;
        }
        return registerFinder(new PackageNamesScanner(packages, recursive));
    }

    /**
     * Adds array of file and directory names to scan for components.
     *
     * Any directories in the list will be scanned recursively, including their sub-directories.
     *
     * @param files array of file and directory names.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig files(String... files) {
        return files(true, files);
    }

    /**
     * Adds array of file and directory names to scan for components.
     *
     * @param recursive defines whether any sub-directories of the directories specified
     *                  in the collection of file names should be recursively scanned (value of {@code true})
     *                  as part of the file scanning or not (value of {@code false}).
     * @param files     array of file and directory names.
     * @return updated resource configuration instance.
     */
    public final ResourceConfig files(boolean recursive, String... files) {
        if (files == null || files.length == 0) {
            return this;
        }
        return registerFinder(new FilesScanner(files, recursive));
    }

    /**
     * Invalidate cached component instances and classes.
     */
    final void invalidateCache() {
        this.cachedClasses = null;
        this.cachedClassesView = null;
        this.cachedSingletons = null;
        this.cachedSingletonsView = null;
    }

    /**
     * Switches the ResourceConfig to read-only state.
     *
     * Called by the WrappingResourceConfig if this ResourceConfig is set as the application.
     * Also called by ApplicationHandler on WrappingResourceConfig at the point when it is going
     * to build the resource model.
     */
    final void lock() {
        final State current = state;
        if (!(current instanceof ImmutableState)) {
            state = new ImmutableState(current);
        }
    }

    @Override
    public final ServerConfig getConfiguration() {
        return this;
    }

    @Override
    public final Map getProperties() {
        return state.getProperties();
    }

    @Override
    public final Object getProperty(String name) {
        return state.getProperty(name);
    }

    @Override
    public Collection getPropertyNames() {
        return state.getPropertyNames();
    }

    @Override
    public final boolean isProperty(final String name) {
        return state.isProperty(name);
    }

    @Override
    public final Set> getClasses() {
        if (cachedClassesView == null) {
            cachedClasses = _getClasses();
            cachedClassesView = Collections.unmodifiableSet(cachedClasses);
        }
        return cachedClassesView;
    }

    @Override
    public final Set getInstances() {
        return getSingletons();
    }

    @Override
    public final Set getSingletons() {
        if (cachedSingletonsView == null) {
            cachedSingletons = _getSingletons();
            cachedSingletonsView = Collections.unmodifiableSet(cachedSingletons == null ? new HashSet() : cachedSingletons);
        }

        return cachedSingletonsView;
    }

    /**
     * Get the internal component bag.
     *
     * @return internal component bag.
     */
    final ComponentBag getComponentBag() {
        return state.getComponentBag();
    }

    /**
     * Configure auto-discoverables.
     *
     * @param locator service locator to obtain auto-discoverables from.
     */
    final void configureAutoDiscoverableProviders(final ServiceLocator locator) {
        state.configureAutoDiscoverableProviders(locator);
    }

    /**
     * Configure custom binders registered in the resource config.
     *
     * @param locator service locator to update with the custom binders.
     */
    final void configureMetaProviders(final ServiceLocator locator) {
        state.configureMetaProviders(locator);
    }

    @Override
    public RuntimeType getRuntimeType() {
        return state.getRuntimeType();
    }

    @Override
    public boolean isEnabled(Feature feature) {
        return state.isEnabled(feature);
    }

    @Override
    public boolean isEnabled(Class featureClass) {
        return state.isEnabled(featureClass);
    }

    @Override
    public boolean isRegistered(Object component) {
        return state.isRegistered(component);
    }

    @Override
    public boolean isRegistered(Class componentClass) {
        return state.isRegistered(componentClass);
    }

    @Override
    public Map, Integer> getContracts(Class componentClass) {
        return state.getContracts(componentClass);
    }

    /**
     * Get configured resource and/or provider classes. The method is overridden
     * in a {@link WrappingResourceConfig private sub-type}.
     *
     * @return set of configured resource and/or provider classes.
     */
    Set> _getClasses() {
        final Set> result = scanClasses();
        result.addAll(state.getClasses());
        return result;
    }

    private Set> scanClasses() {
        Set> result = Sets.newHashSet();

        final ResourceConfig.State _state = state;
        Set rfs = Sets.newHashSet(_state.getResourceFinders());

        // classes registered via configuration property
        String[] classNames = parsePropertyValue(ServerProperties.PROVIDER_CLASSNAMES);
        if (classNames != null) {
            for (String className : classNames) {
                try {
                    result.add(_state.getClassLoader().loadClass(className));
                } catch (ClassNotFoundException e) {
                    LOGGER.log(Level.CONFIG, LocalizationMessages.UNABLE_TO_LOAD_CLASS(className));
                }
            }
        }

        final String[] packageNames = parsePropertyValue(ServerProperties.PROVIDER_PACKAGES);
        if (packageNames != null) {
            final Object p = getProperty(ServerProperties.PROVIDER_SCANNING_RECURSIVE);
            final boolean recursive = p == null || PropertiesHelper.isProperty(p);
            rfs.add(new PackageNamesScanner(packageNames, recursive));
        }

        String[] classPathElements = parsePropertyValue(ServerProperties.PROVIDER_CLASSPATH);
        if (classPathElements != null) {
            rfs.add(new FilesScanner(classPathElements, true));
        }

        AnnotationAcceptingListener afl =
                AnnotationAcceptingListener.newJaxrsResourceAndProviderListener(_state.getClassLoader());
        for (ResourceFinder resourceFinder : rfs) {
            while (resourceFinder.hasNext()) {
                final String next = resourceFinder.next();
                if (afl.accept(next)) {
                    try {
                        afl.process(next, resourceFinder.open());
                    } catch (IOException e) {
                        LOGGER.log(Level.WARNING, LocalizationMessages.RESOURCE_CONFIG_UNABLE_TO_PROCESS(next));
                    }
                }
            }
        }

        result.addAll(afl.getAnnotatedClasses());
        return result;
    }

    private String[] parsePropertyValue(String propertyName) {
        String[] classNames = null;
        final Object o = state.getProperties().get(propertyName);
        if (o != null) {
            if (o instanceof String) {
                classNames = Tokenizer.tokenize((String) o);
            } else if (o instanceof String[]) {
                classNames = Tokenizer.tokenize((String[]) o);
            }
        }
        return classNames;
    }

    /**
     * Return classes which were registered by the user and not found by class path scanning (or any other scanning).
     *
     * @return Set of classes registered by the user.
     */
    Set> getRegisteredClasses() {
        return state.getComponentBag().getRegistrations();
    }

    /**
     * Get configured resource and/or provider instances. The method is overridden
     * in a {@link WrappingResourceConfig private sub-type}.
     *
     * @return set of configured resource and/or provider instances.
     */
    Set _getSingletons() {
        Set result = Sets.newHashSet();
        result.addAll(state.getInstances());
        return result;
    }

    @Override
    public final Set getResources() {
        return state.getResources();
    }

    /**
     * Get resource and provider class loader.
     *
     * @return class loader to be used when looking up the resource classes and
     *         providers.
     */
    public final ClassLoader getClassLoader() {
        return state.getClassLoader();
    }

    /**
     * Returns JAX-RS application corresponding with this ResourceConfig.
     *
     * @return JAX-RS application corresponding with this ResourceConfig.
     */
    public final Application getApplication() {
        return _getApplication();
    }

    /**
     * Allows overriding the {@link #getApplication()} method functionality in {@link WrappingResourceConfig}.
     *
     * @return JAX-RS application corresponding with this ResourceConfig.
     */
    Application _getApplication() {
        return this;
    }

    /**
     * Method used by ApplicationHandler to retrieve application class
     * (this method is overridden by WrappingResourceConfig).
     *
     * @return application class
     */
    Class getApplicationClass() {
        return null;
    }

    /**
     * This method is used by ApplicationHandler to set application instance to the resource config (should
     * always be called on WrappingResourceConfig instance, never on plain instances of ResourceConfig
     * unless we have a bug in the code).
     *
     * @param app JAX-RS application
     * @return this ResourceConfig instance (for convenience)
     */
    final ResourceConfig setApplication(Application app) {
        return _setApplication(app);
    }

    /**
     * Allows overriding the setApplication() method functionality in WrappingResourceConfig.
     *
     * @param app application to be set for this ResourceConfig
     * @return this resource config instance
     */
    ResourceConfig _setApplication(Application app) {
        throw new UnsupportedOperationException();
    }

    private static class WrappingResourceConfig extends ResourceConfig {
        private Application application;
        private Class applicationClass;
        private final Set> defaultClasses = Sets.newHashSet();

        public WrappingResourceConfig(
                Application application, Class applicationClass, Set> defaultClasses) {

            if (application == null && applicationClass == null) {
                throw new IllegalArgumentException(LocalizationMessages.RESOURCE_CONFIG_ERROR_NULL_APPLICATIONCLASS());
            }
            this.application = application;
            this.applicationClass = applicationClass;
            if (defaultClasses != null) {
                this.defaultClasses.addAll(defaultClasses);
            }
            mergeApplications(application);
        }

        /**
         * Set the {@link javax.ws.rs.core.Application JAX-RS Application instance}
         * in the {@code ResourceConfig}.
         *
         * This method is used by the {@link org.glassfish.jersey.server.ApplicationHandler} in case this resource
         * configuration instance was created with application class rather than application instance.
         *
         * @param application JAX-RS Application instance.
         * @return updated resource configuration instance.
         */
        @Override
        ResourceConfig _setApplication(Application application) {
            this.application = application;
            this.applicationClass = null;
            mergeApplications(application);
            return this;
        }

        /**
         * Get the original underlying JAX-RS {@link Application} instance used to
         * initialize the resource configuration instance.
         *
         * @return JAX-RS application instance.
         */
        @Override
        Application _getApplication() {
            return application;
        }

        /**
         * Get the original JAX-RS {@link Application} class provided it was not
         * instantiated yet. A {@code null} is returned in case the class has been
         * instantiated already or was not configured at all.
         * 

         * This class will be used to initialize the resource configuration instance.
         * If there is no JAX-RS application class set, or if the class has been
         * instantiated already, the method will return {@code null}.
         * 

         *
         * @return original JAX-RS application class or {@code null} if there is no
         *         such class configured or if the class has been already instantiated.
         */
        @Override
        Class getApplicationClass() {
            return applicationClass;
        }

        /**
         * Merges fields (e.g. custom binders, properties) of the given application with this application.
         * 

         * The merging should be done because of the possibility of reloading this {@code ResourceConfig} in a container
         * so this resource config should know about custom binders and properties of the underlying application to ensure
         * the reload process will complete successfully.
         * 

         *
         * @param application the application which fields should be merged with this application.
         * @see org.glassfish.jersey.server.spi.Container#reload()
         * @see org.glassfish.jersey.server.spi.Container#reload(ResourceConfig)
         */
        private void mergeApplications(final Application application) {
            if (application instanceof ResourceConfig) {
                // Merge custom binders.
                ResourceConfig rc = (ResourceConfig) application;

                // Merge resources
                super.registerResources(rc.getResources());

                // properties set on the wrapping resource config take precedence
                // (as those are retrieved from the web.xml, for example)
                rc.invalidateCache();
                rc.addProperties(super.getProperties());
                super.addProperties(rc.getProperties());

                rc.lock();
            } else if (application != null) {
                super.addProperties(application.getProperties());
            }
        }

        @Override
        Set> _getClasses() {
            Set> result = Sets.newHashSet();
            Set> applicationClasses = application.getClasses();
            result.addAll(applicationClasses == null ? new HashSet>() : applicationClasses);
            if (result.isEmpty() && getSingletons().isEmpty()) {
                result.addAll(defaultClasses);
            }

            // if the application is not an instance of ResourceConfig, handle scanning triggered via properties
            if (!(application instanceof ResourceConfig)) {
                result.addAll(super._getClasses());
            }
            return result;
        }

        @Override
        Set _getSingletons() {
            return application.getSingletons();
        }
    }

    /**
     * Create runtime configuration initialized from a given deploy-time JAX-RS/Jersey
     * application configuration.
     *
     * @param application deploy-time JAX-RS/Jersey application configuration.
     * @return initialized run-time resource config.
     */
    static ResourceConfig createRuntimeConfig(Application application) {
        return (application instanceof ResourceConfig) ?
                new RuntimeConfig((ResourceConfig) application) : new RuntimeConfig(application);
    }

    private static class RuntimeConfig extends ResourceConfig {
        private final Set> originalRegistrations;
        private final Application application;

        private RuntimeConfig(ResourceConfig original) {
            super(original);

            this.application = original;

            Application customRootApp = ResourceConfig.unwrapCustomRootApplication(original);
            if (customRootApp != null) {
                registerComponentsOf(customRootApp);
            }

            originalRegistrations = Sets.newIdentityHashSet();
            originalRegistrations.addAll(super.getRegisteredClasses());

            // Register externally provided instances.
            Set externalInstances = Sets.filter(original.getSingletons(), new Predicate() {
                @Override
                public boolean apply(Object external) {
                    return !originalRegistrations.contains(external.getClass());
                }
            });
            registerInstances(externalInstances);

            // Register externally provided classes.
            Set> externalClasses = Sets.filter(original.getClasses(), new Predicate>() {
                @Override
                public boolean apply(Class external) {
                    return !originalRegistrations.contains(external);
                }
            });
            registerClasses(externalClasses);
        }

        private void registerComponentsOf(final Application application) {
            Errors.processWithException(new Runnable() {
                @Override
                public void run() {
                    // First register instances that should take precedence over classes
                    // in case of duplicate registrations
                    final Set singletons = application.getSingletons();
                    if (singletons != null) {
                        registerInstances(Sets.filter(singletons, new Predicate() {
                            @Override
                            public boolean apply(Object input) {
                                if (input == null) {
                                    Errors.warning(application, LocalizationMessages.NON_INSTANTIABLE_COMPONENT(input));
                                }
                                return input != null;
                            }
                        }));
                    }

                    final Set> classes = application.getClasses();
                    if (classes != null) {
                        registerClasses(Sets.filter(classes, new Predicate>() {
                            @Override
                            public boolean apply(Class input) {
                                if (input == null) {
                                    Errors.warning(application, LocalizationMessages.NON_INSTANTIABLE_COMPONENT(input));
                                }
                                return input != null;
                            }
                        }));
                    }
                }
            });
        }

        private RuntimeConfig(Application application) {
            super();

            this.application = application;

            if (application != null) {
                registerComponentsOf(application);
            }

            originalRegistrations = super.getRegisteredClasses();
        }

        @Override
        Set> _getClasses() {
            // Get only a read-only classes cached in internal state.
            return super.state.getClasses();
        }

        @Override
        Set _getSingletons() {
            // Get only a read-only classes cached in internal state.
            return super.state.getInstances();
        }

        @Override
        Set> getRegisteredClasses() {
            return originalRegistrations;
        }


        @Override
        Application _getApplication() {
            return application;
        }
    }

    private static Application unwrapCustomRootApplication(ResourceConfig resourceConfig) {
        Application app = null;
        while (resourceConfig != null) {
            app = resourceConfig.getApplication();
            if (app == resourceConfig) {
                // resource config is the root app - return null
                return null;
            } else if (app instanceof ResourceConfig) {
                resourceConfig = (ResourceConfig) app;
            } else {
                break;
            }
        }
        return app;
    }
}
    

    

    
            
    
            







    
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