Xstream Play

xstream Indeed the problem is not as clearly phrased as it should. My guess is that you are using a non-standard collection or using a field of an interface type for which XStream needs. XStream.setupDefaultSecurity(this); to be removed after 1.5 xstream.allowTypesByWildcard(new String[] { com.your.package.** So essentially, you will

xstream, XStream.setupDefaultSecurity(this); to be removed after 1.5 xstream.allowTypesByWildcard(new String[] { com.your.package.** So essentially, you will.