1 files changed, 14 insertions, 0 deletions
diff --git a/classes/IsisNormalSubfieldFilterIterator.php b/classes/IsisNormalSubfieldFilterIterator.php
new file mode 100644
index 0000000..98494a6
--- /dev/null
+++ b/classes/IsisNormalSubfieldFilterIterator.php
@@ -0,0 +1,14 @@
+<?php
+
+/**
+ * Isis normal subfield iterator. Filter out special subfields.
+ */
+class IsisNormalSubfieldFilterIterator extends FilterIterator {
+  public function accept()
+  {
+    $field    = $this->getInnerIterator()->field;
+    $class    = $this->getInnerIterator()->class;
+    $subfield = $this->getInnerIterator()->current();
+    return !$class->specialSubfield($field, $subfield);
+  }
+}