@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((activityId == null) ? 0 : activityId.hashCode()); result = prime * result + ((instructionId == null) ? 0 : instructionId.hashCode()); result = prime * result + ((wfDetails == null) ? 0 : wfDetails.hashCode()); return result; }