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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012-2014 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:
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 *
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package org.glassfish.jersey.server;

import javax.ws.rs.container.ResourceInfo;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.ext.ReaderInterceptor;

import javax.inject.Inject;
import javax.inject.Provider;

import org.glassfish.jersey.internal.util.collection.Ref;
import org.glassfish.jersey.internal.util.collection.Value;
import org.glassfish.jersey.server.internal.routing.UriRoutingContext;
import org.glassfish.jersey.server.spi.RequestScopedInitializer;

import org.glassfish.hk2.api.ServiceLocator;

import jersey.repackaged.com.google.common.base.Function;

/**
 * Request/response injection references initialization stage.
 *
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
class ReferencesInitializer implements Function {

    @Inject
    private ServiceLocator locator;
    @Inject
    private Provider> requestRefProvider;
    @Inject
    private Provider> containerRequestRefProvider;
    @Inject
    private Provider uriRoutingCtxProvider;
    @Inject
    private Provider> uriInfoRef;
    @Inject
    private Provider> resourceInfoRef;
    @Inject
    private Provider> httpHeadersRef;
    @Inject
    private Provider> requestRef;


    /**
     * Initialize the request references using the incoming request and register
     * a response reference initialization stage in the
     * {@link org.glassfish.jersey.server.internal.process.RespondingContext
     * responding context}.
     *
     * @param containerRequest incoming request context.
     * @return same (unmodified) request context.
     */
    @Override
    public ContainerRequest apply(final ContainerRequest containerRequest) {
        requestRefProvider.get().set(containerRequest.getRequest());
        containerRequestRefProvider.get().set(containerRequest);

        final RequestScopedInitializer requestScopedInitializer = containerRequest.getRequestScopedInitializer();
        if (requestScopedInitializer != null) {
            requestScopedInitializer.initialize(locator);
        }

        final UriRoutingContext uriRoutingCtx = uriRoutingCtxProvider.get();

        containerRequest.setUriRoutingContext(uriRoutingCtx);
        containerRequest.getRequestEventBuilder().setExtendedUriInfo(uriRoutingCtx);

        containerRequest.setReaderInterceptors(new Value>() {
            @Override
            public Iterable get() {
                return uriRoutingCtx.getBoundReaderInterceptors();
            }
        });

        // JAX-RS proxies initialization
        requestRef.get().set(containerRequest);
        uriInfoRef.get().set(uriRoutingCtx);
        resourceInfoRef.get().set(uriRoutingCtx);
        httpHeadersRef.get().set(containerRequest);

        return containerRequest;
    }
}