<?php
/*
 * Copyright 2018 Google LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

namespace Google\ApiCore\Transport\Grpc;

use Grpc\AbstractCall;

/**
 * Class ForwardingCall wraps a \Grpc\AbstractCall.
 *
 * @experimental
 */
abstract class ForwardingCall
{
    /** @var AbstractCall */
    protected $innerCall;

    /**
     * ForwardingCall constructor.
     *
     * @param AbstractCall|ForwardingCall $innerCall
     */
    public function __construct($innerCall)
    {
        $this->innerCall = $innerCall;
    }

    /**
     * @return mixed The metadata sent by the server
     */
    public function getMetadata()
    {
        return $this->innerCall->getMetadata();
    }

    /**
     * @return mixed The trailing metadata sent by the server
     */
    public function getTrailingMetadata()
    {
        return $this->innerCall->getTrailingMetadata();
    }

    /**
     * @return string The URI of the endpoint
     */
    public function getPeer()
    {
        return $this->innerCall->getPeer();
    }

    /**
     * Cancels the call.
     */
    public function cancel()
    {
        $this->innerCall->cancel();
    }
}