1 files changed, 52 insertions, 0 deletions
diff --git a/library/Director/CustomVariable/CustomVariableNull.php b/library/Director/CustomVariable/CustomVariableNull.php
new file mode 100644
index 0000000..f87ccfa
--- /dev/null
+++ b/library/Director/CustomVariable/CustomVariableNull.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Icinga\Module\Director\CustomVariable;
+
+use Icinga\Exception\ProgrammingError;
+
+class CustomVariableNull extends CustomVariable
+{
+    public function equals(CustomVariable $var)
+    {
+        return $var instanceof CustomVariableNull;
+    }
+
+    public function getValue()
+    {
+        return null;
+    }
+
+    public function getDbValue()
+    {
+        return json_encode($this->getValue());
+    }
+
+    public function getDbFormat()
+    {
+        return 'json';
+    }
+
+    public function setValue($value)
+    {
+        if (! is_null($value)) {
+            throw new ProgrammingError(
+                'Null can only be null, got %s',
+                var_export($value, 1)
+            );
+        }
+
+        $this->deleted = false;
+
+        return $this;
+    }
+
+    public function toConfigString($renderExpressions = false)
+    {
+        return 'null';
+    }
+
+    public function toLegacyConfigString()
+    {
+        return $this->toConfigString();
+    }
+}