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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2014 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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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * 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.client.oauth1;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;

import org.glassfish.jersey.message.MessageBodyWorkers;
import org.glassfish.jersey.oauth1.signature.OAuth1Request;

import jersey.repackaged.com.google.common.collect.Lists;

/**
 * Implements the OAuth signature library Request interface, wrapping a Jersey
 * client request object.
 *
 * @author Paul C. Bryan 
 * @since 2.3
 */
class RequestWrapper implements OAuth1Request {

    /** The wrapped Jersey client request. */
    private final ClientRequestContext clientRequest;

    private final MessageBodyWorkers messageBodyWorkers;


    /** Form and query parameters from the request (lazily initialized). */
    private MultivaluedMap parameters = null;

    private void setParameters() {
        parameters = new MultivaluedHashMap();
        parameters.putAll(RequestUtil.getQueryParameters(clientRequest));
        parameters.putAll(RequestUtil.getEntityParameters(clientRequest, messageBodyWorkers));
    }

    /**
     * Constructs a new OAuth client request wrapper around the specified
     * Jersey client request object.
     *
     * @param clientRequest Client request.
     * @param messageBodyWorkers Message body workers.
     */
    public RequestWrapper(final ClientRequestContext clientRequest, MessageBodyWorkers messageBodyWorkers) {
        this.clientRequest = clientRequest;
        this.messageBodyWorkers = messageBodyWorkers;
        setParameters(); // stored because parsing query/entity parameters too much work for each value-get
    }

    @Override
    public String getRequestMethod() {
        return clientRequest.getMethod();
    }

    @Override
    public URL getRequestURL() {
        try {
            final URI uri = clientRequest.getUri();
            return uri.toURL();
        } catch (MalformedURLException ex) {
            Logger.getLogger(RequestWrapper.class.getName()).log(Level.SEVERE, null, ex);
            return null;
        }
    }

    @Override
    public Set getParameterNames() {
        return parameters.keySet();
    }

    @Override
    public List getParameterValues(final String name) {
        return parameters.get(name);
    }

    @Override
    public List getHeaderValues(final String name) {

        ArrayList list = Lists.newArrayList();

        for (String header : clientRequest.getStringHeaders().get(name)) {
            list.add(header);
        }

        return list;
    }

    @Override
    public void addHeaderValue(final String name, final String value) {
        clientRequest.getHeaders().add(name, value);
    }
}