@Override
public String negotiate(String target, Object context) {
String res = null;
NegotiationDescriptor negd = negReg.getNegotiation(target);
if (negd != null) {
List<NegotiatorDescriptor> nds = negd.getNegotiators();
for (NegotiatorDescriptor nd : nds) {
Class<Negotiator> ndc = nd.getNegotiatorClass();
try {
Negotiator neg = ndc.newInstance();
neg.setProperties(nd.getProperties());
res = neg.getResult(target, context);
if (res != null) {
break;
}
} catch (IllegalAccessException | InstantiationException e) {
throw new RuntimeException(e);
}
}
}
return res;
}