1 files changed, 5 insertions, 3 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/VerifierDispatcher.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/VerifierDispatcher.java
index 509494b2..4fb883a3 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/VerifierDispatcher.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/VerifierDispatcher.java
@@ -69,9 +69,11 @@ public class VerifierDispatcher {
 		try {
 			for (int i = 0; i < currentClasses.length; i++) {
 				String clsName = currentClasses[i];
-				Class<? extends IVerifyFilter> cls = (Class<? extends IVerifyFilter>) Class
-						.forName(clsName);
-				IVerifyFilter filter = cls.newInstance();
+				Class<?> cls = Class.forName(clsName);
+				Object f = cls.newInstance();
+				if (!(f instanceof IVerifyFilter))
+					throw new ClassCastException();
+				IVerifyFilter filter = (IVerifyFilter) f;
 				filter.setConfiguration((Configuration) settings);
 				List<FilterEntry> entries = filter.getFiters();
 				Iterator<FilterEntry> it = entries.iterator();