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-rw-r--r--classes/IsisMethodIterator.php62
1 files changed, 62 insertions, 0 deletions
diff --git a/classes/IsisMethodIterator.php b/classes/IsisMethodIterator.php
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+<?php
+
+/**
+ * Iterates over all callable methods for database mapping.
+ */
+class IsisMethodIterator implements Iterator
+{
+ private $total = 0;
+ private $class;
+ private $keys;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ */
+ public function __construct($class) {
+ $this->class = $class;
+ $this->total = count($class->fields);
+ $this->keys = array_keys($class->fields);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->position = 0;
+ }
+
+ /**
+ * 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[$this->position]];
+ }
+
+ /**
+ * Move forward to next element.
+ */
+ function next() {
+ do {
+ ++$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;
+ }
+}