* @author Marcus Boerger
* @version 1.0
*
- * Instances of this class act as a filter around iterators whose elements
- * are strings. In other words you can put an iterator into the constructor
- * and the instance will only return elements which match the given regular
- * expression.
+ * Instances of this class act as a filter around iterators. In other words
+ * you can put an iterator into the constructor and the instance will only
+ * return selected (accepted) elements.
*/
abstract class FilterIterator implements Iterator
{
* method is called.
*
* @param it Object that implements at least spl_forward
- * @patam regex Regular expression used as a filter.
*/
function __construct(Iterator $it) {
$this->it = $it;
}
+ /**
+ * Rewind the inner iterator.
+ */
function rewind() {
$this->it->rewind();
$this->fetch();
}
+ /**
+ * Accept function to decide whether an element of the inner iterator
+ * should be accessible through the Filteriterator.
+ *
+ * @return whether or not to expose the current element of the inner
+ * iterator.
+ */
abstract function accept();
/**