XStream loading problem

[fh250049]

Code was compiled with Xstream 1.4.11 which is not able to load, due to security features added to XStream.

need to add to POM.xml

com.thoughtworks.xstream
xstream
1.4.20

add the below lines:
public static String buildXmlFromRuleset(Ruleset tree) {
Class<?>[] classes = new Class[] { Ruleset.class,Rule.class,DelphiRule.class, Property.class};

XStream xstream = new XStream();   

XStream.setupDefaultSecurity(xstream); // support for Xstream 1.4.20
xstream.allowTypes(classes); // support for Xstream 1.4.20

and in:
private static Ruleset buildRuleSetFromXml(String configuration) {

Class<?>[] classes = new Class[] { Ruleset.class,Rule.class,DelphiRule.class, Property.class};

XStream xstream = new XStream();    
    XStream.setupDefaultSecurity(xstream);

    xstream.allowTypes(classes); // support for Xstream 1.4.20