#vulnerable code 
                                public boolean getDataFlag(int propertyId, int id) {
        return ((this.getDataPropertyByte(propertyId) == null ? 0 : this.getDataPropertyByte(propertyId).data & 0xff) & (1 << id)) > 0;
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public boolean getDataFlag(int propertyId, int id) {
        return ((this.getDataPropertyByte(propertyId).data & 0xff) & (1 << id)) > 0;
    }