Use RuntimeException classes rather than Error to indicate errors.

1 files changed, 2 insertions, 2 deletions

diff --git a/org/madore/damlengine/LangHelper.java b/org/madore/damlengine/LangHelper.java
index e2a74db..c1d736c 100644
--- a/org/madore/damlengine/LangHelper.java
+++ b/org/madore/damlengine/LangHelper.java
@@ -24,7 +24,7 @@ public class LangHelper {
 
     public static void setLangNorec(Element node, String lang) {
 	if ( lang == null )
-	    throw new Error("lang is null in setLangNorec");
+	    throw new IllegalArgumentException("lang is null in setLangNorec");
 	node.setAttributeNS(DamlEngine.XML_NS, LANG, lang);
     }
 
@@ -46,7 +46,7 @@ public class LangHelper {
 
     public static void setLangRec(Element node, String lang) {
 	if ( lang == null )
-	    throw new Error("lang is null in setLangRec");
+	    throw new IllegalArgumentException("lang is null in setLangRec");
 	String parentLang = getLangRec(node.getParentNode());
 	if ( lang.equals(parentLang) )
 	    unsetLangNorec(node);