How to use

isChange

method

in

org.apache.james.mailbox.model.MessageMoves

public void setInMailboxesNoCheck(MessageId messageId, MailboxId targetMailboxId, MailboxSession mailboxSession) throws MailboxException {
  MessageIdMapper messageIdMapper = mailboxSessionMapperFactory.getMessageIdMapper(mailboxSession);
  List<MailboxMessage> currentMailboxMessages = messageIdMapper.find(ImmutableList.of(messageId), MessageMapper.FetchType.Full);
  MessageMoves messageMoves = MessageMoves.builder()
    .previousMailboxIds(toMailboxIds(currentMailboxMessages))
    .targetMailboxIds(targetMailboxId)
    .build();
  if (messageMoves.isChange()) {
    applyMessageMoveNoMailboxChecks(mailboxSession, currentMailboxMessages, messageMoves);
  }
}

@Override
public void setInMailboxes(MessageId messageId, Collection<MailboxId> targetMailboxIds, MailboxSession mailboxSession) throws MailboxException {
  assertRightsOnMailboxes(targetMailboxIds, mailboxSession, Right.Read);
  List<MailboxMessage> currentMailboxMessages = findRelatedMailboxMessages(messageId, mailboxSession);
  if (currentMailboxMessages.isEmpty()) {
    LOGGER.info("Tried to access {} not accessible for {}", messageId, mailboxSession.getUser().getUserName());
    return;
  }
  MessageMoves messageMoves = MessageMoves.builder()
    .targetMailboxIds(targetMailboxIds)
    .previousMailboxIds(toMailboxIds(currentMailboxMessages))
    .build();
  if (messageMoves.isChange()) {
    applyMessageMoves(mailboxSession, currentMailboxMessages, messageMoves);
  }
}