From c2381df90612de26f2b3524897a61f0d8ad8cb0b Mon Sep 17 00:00:00 2001
From: Silvio <silvio@devlet.com.br>
Date: Thu, 1 Jul 2010 15:00:10 -0300
Subject: Adding IsisRowIterator

---
 classes/IsisConnector.php      |  4 +--
 classes/IsisMethodIterator.php |  2 +-
 classes/IsisRowIterator.php    | 58 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 3 deletions(-)
 create mode 100644 classes/IsisRowIterator.php

diff --git a/classes/IsisConnector.php b/classes/IsisConnector.php
index 3978d0b..1111672 100644
--- a/classes/IsisConnector.php
+++ b/classes/IsisConnector.php
@@ -96,7 +96,7 @@ class IsisConnector {
    *   Field data.
    */
   public function getFields($field) {
-    for ($row = 0; $row <= $this->getRows($field); $row++) {
+    foreach (new IsisRowIterator($this, $field) as $row) {
       $values[$row] = $this->getField($field, $row);
     }
 
@@ -137,7 +137,7 @@ class IsisConnector {
    *   Subfield data.
    */
   public function getSubfields($field, $subfield) {
-    for ($row = 0; $row <= $this->getRows($field); $row++) {
+    foreach (new IsisRowIterator($this, $field) as $row) {
       $values[$row] = $this->getSubfield($field, $subfield, $row);
     }
 
diff --git a/classes/IsisMethodIterator.php b/classes/IsisMethodIterator.php
index 51820ed..4e5871c 100644
--- a/classes/IsisMethodIterator.php
+++ b/classes/IsisMethodIterator.php
@@ -44,7 +44,7 @@ class IsisMethodIterator implements Iterator
   }
 
   /**
-   * Move forward to next element. The method should be callabe, otherwise
+   * Move forward to next element. The method should be callable, otherwise
    * we move to the next position.
    */
   function next() {
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;
+  }  
+}  
-- 
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