Adding IsisRowIterator

1 files changed, 58 insertions, 0 deletions

diff --git a/classes/IsisRowIterator.php b/classes/IsisRowIterator.php
new file mode 100644
index 0000000..a81373e
--- /dev/null
+++ b/classes/IsisRowIterator.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * Iterates over all rows from a field result.
+ */
+class IsisRowIterator implements Iterator
+{
+  private $position = 0;
+  private $total    = 0;
+
+  /**
+   * Constructor.
+   *
+   * @param $class
+   *   Instance of IsisConnector or child class.
+   *
+   * @param $field
+   *   Field to iterate over.
+   */ 
+  public function __construct($class, $field) {
+    $this->total = $class->getRows($field);
+  }
+
+  /**
+   * Rewind the Iterator to the first element.
+   */
+  function rewind() {
+    $this->position = 0;
+  }
+
+  /**
+   * Return the key of the current element.
+   */
+  function key() {
+    return $this->position;
+  }
+
+  /**
+   * Return the current element.
+   */
+  function current() {
+    return $this->position;
+  }
+
+  /**
+   * Move forward to next element.
+   */
+  function next() {
+    ++$this->position;
+  }
+
+  /**
+   * Check if there is a current element after calls to rewind() or next().
+   */
+  function valid() {
+    return $this->position <= $this->total;
+  }  
+}