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-rw-r--r-- | classes/IsisFieldIterator.php | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/classes/IsisFieldIterator.php b/classes/IsisFieldIterator.php new file mode 100644 index 0000000..fb67b65 --- /dev/null +++ b/classes/IsisFieldIterator.php @@ -0,0 +1,65 @@ +<?php + +/** + * Isis field iterator. Iterates over all field values for + * each result row. + */ +class IsisFieldIterator implements Iterator +{ + private $valueset; + private $row = 0; + private $rows = 0; + + /** + * Constructor. + * + * @param $class + * Instance of IsisConnector or child class. + * + * @param $field + * Field to iterate over. + */ + public function __construct($class, $field) { + $this->rows = $class->getRows($field); + $this->valueset = $class->getValues($field); + } + + /** + * Rewind the Iterator to the first element. + */ + function rewind() { + $this->row = 0; + $this->value = 0; + } + + /** + * Return the key of the current element. + */ + function key() { + return $this->row; + } + + /** + * Return the current element. + */ + function current() { + return $this->valueset[$this->row]['field']; + } + + /** + * Move forward to next element. + */ + function next() { + do { + ++$this->row; + } + while ($this->current() == NULL && $this->valid()); + } + + /** + * Check if there is a current element after calls to rewind() or next(). + */ + function valid() { + return $this->row <= $this->rows; + } +} |