Api to get NonConformance Review

try below : 

package ext;

import com.ptc.qualitymanagement.nc.Nonconformance;
import com.ptc.qualitymanagement.nc.review.NCReview;
import wt.query.OrderBy;
import wt.query.QueryException;
import wt.query.QuerySpec;
import wt.query.SearchCondition;
import wt.fc.QueryResult;    
import wt.util.WTException;
import wt.pds.StatementSpec;
import wt.fc.PersistenceHelper;

public class NCService{

public static NCReview getNCReview(Nonconformance NC) throws WTException {

         
        NCReview review = null;
 try {
        QuerySpec qs = new QuerySpec(NCReview.class);
        qs.appendWhere(new SearchCondition(NCReview.class,
                NCReview.NONCONFORMANCE_REFERENCE + ".key.id",
                SearchCondition.EQUAL,
                NC.getPersistInfo().getObjectIdentifier().getId()),
                new int[]{0});
        QueryResult results = PersistenceHelper.manager.find((StatementSpec)qs);
        if(results.hasMoreElements())    {
            Object obj = results.nextElement();
            if(obj instanceof NCReview) {
                review = (NCReview) obj;
            }
        } 
        return review;
    }catch(WTException e){
        System.err.println("Exception" +e);
    }
return review;
}

}