aboutsummaryrefslogtreecommitdiff
path: root/classes/iterators/IsisMethodIterator.php
blob: e5188d33bbc36e4f731a625622df82ed0c9e7a3d (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
<?php

/**
 * Iterates over all callable methods for database mapping.
 */
class IsisMethodIterator implements Iterator
{
  private $total = 0;
  private $class;
  private $keys;
  private $position = -1;

  /**
   * Constructor.
   *
   * @param $class
   *   Instance of IsisConnector or child class.
   */ 
  public function __construct($class) {
    // Setup.
    $this->class = $class;
    $this->total = count($class->fields);
    $this->keys  = array_keys($class->fields);

    // Find the first valid occurrence.
    $this->next();
  }

  /**
   * Rewind the Iterator to the first valid element.
   */
  function rewind() {
    $this->position = -1;
    $this->next();
  }

  /**
   * Return the key of the current element.
   */
  function key() {
    $type = $this->class->getMapType($this->current());
    return $this->class->methodName($type);
  }

  /**
   * Return the current element.
   */
  function current() {
    return $this->class->fields[$this->keys[$this->position]];
  }

  /**
   * Move forward to next element. The method should be callable, otherwise
   * we move to the next position.
   */
  function next() {
    do {
      ++$this->position;
    }
    while (!is_callable(array($this->class, $this->key())) && $this->valid());
  }

  /**
   * Check if there is a current element after calls to rewind() or next().
   */
  function valid() {
    return $this->position < $this->total - 1;
  }  
}