blob: c5a078c1b9af9f5dc86c1da7df77b4460f77712a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
<?php
/**
* TPagedDataSource, TPagedListIterator, TPagedMapIterator classes
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package System.Collections
*/
/**
* TPagedMapIterator class
*
* TPagedMapIterator implements Iterator interface.
*
* TPagedMapIterator is used by {@link TPagedDataSource}. It allows TPagedDataSource
* to return a new iterator for traversing the items in a {@link TMap} object.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package System.Collections
* @since 3.0
*/
class TPagedMapIterator implements Iterator
{
private $_map;
private $_startIndex;
private $_count;
private $_index;
private $_iterator;
/**
* Constructor.
* @param array the data to be iterated through
*/
public function __construct(TMap $map,$startIndex,$count)
{
$this->_map=$map;
$this->_index=0;
$this->_startIndex=$startIndex;
if($startIndex+$count>$map->getCount())
$this->_count=$map->getCount()-$startIndex;
else
$this->_count=$count;
$this->_iterator=$map->getIterator();
}
/**
* Rewinds internal array pointer.
* This method is required by the interface Iterator.
*/
public function rewind()
{
$this->_iterator->rewind();
for($i=0;$i<$this->_startIndex;++$i)
$this->_iterator->next();
$this->_index=0;
}
/**
* Returns the key of the current array item.
* This method is required by the interface Iterator.
* @return integer the key of the current array item
*/
public function key()
{
return $this->_iterator->key();
}
/**
* Returns the current array item.
* This method is required by the interface Iterator.
* @return mixed the current array item
*/
public function current()
{
return $this->_iterator->current();
}
/**
* Moves the internal pointer to the next array item.
* This method is required by the interface Iterator.
*/
public function next()
{
$this->_index++;
$this->_iterator->next();
}
/**
* Returns whether there is an item at current position.
* This method is required by the interface Iterator.
* @return boolean
*/
public function valid()
{
return $this->_index<$this->_count;
}
}
|
