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<?php
/**
* Iterates over all callable methods for database mapping.
*/
class IsisMethodIterator implements Iterator
{
private $total = 0;
private $isis;
private $keys;
private $position = -1;
/**
* Constructor.
*
* @param $isis
* Instance of IsisConnector or child class.
*
* @param $class
* Optional class where to look for methods, defaults
* to $isis itself.
*/
public function __construct($isis, $class = NULL) {
// Setup.
$this->isis = $isis;
$this->total = count($isis->fields);
$this->keys = array_keys($isis->fields);
$this->class = ($class == null) ? $isis : $class;
// 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 = $this->isis->getMapType($this->current());
return $this->isis->methodName($type);
}
/**
* Return the current element.
*/
function current() {
return $this->isis->fields[$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;
}
}
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