catch number parse exception in literal creation

content-rdf/src/main/java/org/xbib/content/rdf/internal/DefaultLiteral.java

@@ -94,10 +94,12 @@ public class DefaultLiteral implements Literal, Comparable<Literal> {
             return value;
         }
         String s = value.toString();
+        try {
             switch (type.toString()) {
                 case "xsd:long":
                     return Long.parseLong(s);
                 case "xsd:int":
+                    return Integer.parseInt(s);
                 case "xsd:gYear":
                     return Integer.parseInt(s);
                 case "xsd:boolean":
@@ -109,6 +111,9 @@ public class DefaultLiteral implements Literal, Comparable<Literal> {
                 default:
                     return s;
             }
+        } catch (NumberFormatException e) {
+            return null;
+        }
     }
 
     @Override

gradle.properties

@@ -1,6 +1,6 @@
 group = org.xbib
 name = content
-version = 1.2.1
+version = 1.2.2
 
 jackson.version = 2.8.11
 xbib-net.version = 1.0.0