Implement composite validator, and make Interchange use that.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1606 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/ConfigSchema/Validator/Composite.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Groups several validators together, which can be used with logical validators
+ */
+class HTMLPurifier_ConfigSchema_Validator_Composite extends HTMLPurifier_ConfigSchema_Validator
+{
+    
+    protected $validators = array();
+    
+    public function addValidator($validator) {
+        $this->validators[] = $validator;
+    }
+    
+    public function validate(&$arr, $interchange) {
+        foreach ($this->validators as $validator) {
+            $validator->validate($arr, $interchange);
+        }
+    }
+    
+}