From 1d84217ed97be237d2696c85a997c9e52114b984 Mon Sep 17 00:00:00 2001
From: Silvio <silvio@devlet.com.br>
Date: Mon, 19 Jul 2010 18:04:40 -0300
Subject: Lots of API changes at IsisConnector and iterators

---
 classes/iterators/IsisMainItemIterator.php | 87 ++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 classes/iterators/IsisMainItemIterator.php

(limited to 'classes/iterators/IsisMainItemIterator.php')

diff --git a/classes/iterators/IsisMainItemIterator.php b/classes/iterators/IsisMainItemIterator.php
new file mode 100644
index 0000000..02ab8d1
--- /dev/null
+++ b/classes/iterators/IsisMainItemIterator.php
@@ -0,0 +1,87 @@
+<?php
+
+/**
+ * Isis field iterator. Iterates over all field main values for
+ * each result row.
+ *
+ * @todo
+ *   Support for 'join_subfields'
+ */
+class IsisMainItemIterator implements Iterator
+{
+  private $class;
+  private $field;
+  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);
+    $this->class    = $class;
+    $this->field    = $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() {
+    $field = $this->class->getMainItemName($this->field);
+    return $this->valueset[$this->row][$field];
+  }
+
+  /**
+   * Move forward to next element.
+   */
+  function next() {
+    do {
+      ++$this->row;
+    }
+    while ($this->current_null() && $this->has_more_rows());
+  }
+
+  /**
+   * Check if there are more rows.
+   */
+  function has_more_rows() {
+    return $this->row <= $this->rows;
+  }
+
+  /**
+   * Check if the current value is null.
+   */
+  function current_null() {
+    return $this->current() == NULL;
+  }
+
+  /**
+   * Check if there is a current element after calls to rewind() or next().
+   */
+  function valid() {
+    return $this->has_more_rows() && !$this->current_null();
+  }  
+}
-- 
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