@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((activationTime == null) ? 0 : activationTime.hashCode()); result = prime * result + CollectionUtils.hashCode(attachments); result = prime * result + CollectionUtils.hashCode(comments); result = prime * result + ((createdOn == null) ? 0 : createdOn.hashCode()); result = prime * result + ((expirationTime == null) ? 0 : expirationTime.hashCode()); result = prime * result + (skipable ? 1231 : 1237); result = prime * result + ((status == null) ? 0 : status.hashCode()); result = prime * result + ((previousStatus == null) ? 0 : previousStatus.hashCode()); result = prime * result + ((workItemId == -1) ? 0 : (int) workItemId); // Should I add parentId to this hashCode? return result; }