Class CardTerminals

Constructs a new CardTerminals object.

This constructor is called by subclasses only. Application should call TerminalFactory.terminals() to obtain a CardTerminals object.

Returns an unmodifiable list of all terminals matching the specified state.

If state is State.ALL, this method returns all CardTerminals encapsulated by this object. If state is State.CARD_PRESENT or State.CARD_ABSENT, it returns all CardTerminals where a card is currently present or absent, respectively.

If state is State.CARD_INSERTION or State.CARD_REMOVAL, it returns all CardTerminals for which an insertion (or removal, respectively) was detected during the last call to waitForChange(). If waitForChange() has not been called on this object, CARD_INSERTION is equivalent to CARD_PRESENT and CARD_REMOVAL is equivalent to CARD_ABSENT. For an example of the use of CARD_INSERTION, see waitForChange().

Waits for card insertion or removal in any of the terminals of this object.

This call is equivalent to calling waitForChange(0).

Waits for card insertion or removal in any of the terminals of this object or until the timeout expires.

This method examines each CardTerminal of this object. If a card was inserted into or removed from a CardTerminal since the previous call to waitForChange(), it returns immediately. Otherwise, or if this is the first call to waitForChange() on this object, it blocks until a card is inserted into or removed from a CardTerminal.

If timeout is greater than 0, the method returns after timeout milliseconds even if there is no change in state. In that case, this method returns false; otherwise it returns true.

This method is often used in a loop in combination with list(State.CARD_INSERTION), for example:

TerminalFactory factory = ...;
  CardTerminals terminals = factory.terminals();
  while (true) {
      for (CardTerminal terminal : terminals.list(CARD_INSERTION)) {
          // examine Card in terminal, return if it matches
      }
      terminals.waitForChange();
  }