1 files changed, 18 insertions, 0 deletions
diff --git a/config-application-package/src/main/java/com/yahoo/config/application/ValidationProcessor.java b/config-application-package/src/main/java/com/yahoo/config/application/ValidationProcessor.java
new file mode 100644
index 00000000000..5f430f70584
--- /dev/null
+++ b/config-application-package/src/main/java/com/yahoo/config/application/ValidationProcessor.java
@@ -0,0 +1,18 @@
+package com.yahoo.config.application;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+
+import javax.xml.transform.TransformerException;
+import java.io.IOException;
+
+public class ValidationProcessor implements PreProcessor {
+
+    @Override
+    public Document process(Document input) throws IOException, TransformerException {
+        NodeList includeitems = input.getElementsByTagNameNS("http://www.w3.org/2001/XInclude", "*");
+        if (includeitems.getLength() > 0)
+            throw new UnsupportedOperationException("XInclude not supported, use preprocess:include instead");
+        return input;
+    }
+}
+\ No newline at end of file