<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2010-2013, Sebastian Bergmann <sb@sebastian-bergmann.de>.
 * 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 Sebastian Bergmann nor the names of his
 *     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.
 *
 * @package    PHPUnit_MockObject
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2010-2013 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @link       http://github.com/sebastianbergmann/phpunit-mock-objects
 * @since      File available since Release 1.0.0
 */

/**
 *
 *
 * @package    PHPUnit_MockObject
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2010-2013 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @version    Release: 1.2.3
 * @link       http://github.com/sebastianbergmann/phpunit-mock-objects
 * @since      Class available since Release 1.0.0
 */
class PHPUnit_Framework_MockObject_Stub_ReturnCallback implements PHPUnit_Framework_MockObject_Stub
{
    protected $callback;

    public function __construct($callback)
    {
        $this->callback = $callback;
    }

    public function invoke(PHPUnit_Framework_MockObject_Invocation $invocation)
    {
        return call_user_func_array($this->callback, $invocation->parameters);
    }

    public function toString()
    {
        if (is_array($this->callback)) {
            if (is_object($this->callback[0])) {
                $class = get_class($this->callback[0]);
                $type  = '->';
            } else {
                $class = $this->callback[0];
                $type  = '::';
            }

            return sprintf(
              'return result of user defined callback %s%s%s() with the ' .
              'passed arguments',

              $class,
              $type,
              $this->callback[1]
            );
        } else {
            return 'return result of user defined callback ' . $this->callback .
                   ' with the passed arguments';
        }
    }
}