1<?php
2
3/**
4 * Hoa
5 *
6 *
7 * @license
8 *
9 * New BSD License
10 *
11 * Copyright © 2007-2017, Hoa community. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 *     * Redistributions of source code must retain the above copyright
16 *       notice, this list of conditions and the following disclaimer.
17 *     * Redistributions in binary form must reproduce the above copyright
18 *       notice, this list of conditions and the following disclaimer in the
19 *       documentation and/or other materials provided with the distribution.
20 *     * Neither the name of the Hoa nor the names of its contributors may be
21 *       used to endorse or promote products derived from this software without
22 *       specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37namespace Hoa\Stream;
38
39/**
40 * Class \Hoa\Stream\Composite.
41 *
42 * Declare a composite stream, i.e. a stream that uses a stream.
43 *
44 * @copyright  Copyright © 2007-2017 Hoa community
45 * @license    New BSD License
46 */
47abstract class Composite
48{
49    /**
50     * Current stream.
51     *
52     * @var mixed
53     */
54    protected $_stream      = null;
55
56    /**
57     * Inner stream.
58     *
59     * @var \Hoa\Stream
60     */
61    protected $_innerStream = null;
62
63
64
65    /**
66     * Set current stream.
67     *
68     * @param   object  $stream    Current stream.
69     * @return  object
70     */
71    protected function setStream($stream)
72    {
73        $old           = $this->_stream;
74        $this->_stream = $stream;
75
76        return $old;
77    }
78
79    /**
80     * Get current stream.
81     *
82     * @return  object
83     */
84    public function getStream()
85    {
86        return $this->_stream;
87    }
88
89    /**
90     * Set inner stream.
91     *
92     * @param   \Hoa\Stream  $innerStream    Inner stream.
93     * @return  \Hoa\Stream
94     */
95    protected function setInnerStream(Stream $innerStream)
96    {
97        $old                = $this->_innerStream;
98        $this->_innerStream = $innerStream;
99
100        return $old;
101    }
102
103    /**
104     * Get inner stream.
105     *
106     * @return  \Hoa\Stream
107     */
108    public function getInnerStream()
109    {
110        return $this->_innerStream;
111    }
112}
113