public synchronized List<CardTerminal> list(State state) throws CardException {
// System.out.println("list");
if (state == null) {
throw new NullPointerException();
}
try {
String[] readerNames = SCardListReaders(contextId);
List<CardTerminal> list = new ArrayList<CardTerminal>(readerNames.length);
if (stateMap == null) {
// If waitForChange() has never been called, treat event
// queries as status queries.
if (state == CARD_INSERTION) {
state = CARD_PRESENT;
} else if (state == CARD_REMOVAL) {
state = CARD_ABSENT;
}
}
for (String readerName : readerNames) {
CardTerminal terminal = implGetTerminal(readerName);
ReaderState readerState;
switch (state) {
case ALL:
list.add(terminal);
break;
case CARD_PRESENT:
if (terminal.isCardPresent()) {
list.add(terminal);
}
break;
case CARD_ABSENT:
if (terminal.isCardPresent() == false) {
list.add(terminal);
}
break;
case CARD_INSERTION:
readerState = stateMap.get(readerName);
if ((readerState != null) && readerState.isInsertion()) {
list.add(terminal);
}
break;
case CARD_REMOVAL:
readerState = stateMap.get(readerName);
if ((readerState != null) && readerState.isRemoval()) {
list.add(terminal);
}
break;
default:
throw new CardException("Unknown state: " + state);
}
}
return Collections.unmodifiableList(list);
} catch (PCSCException e) {
throw new CardException("list() failed", e);
}
}
static List<CardTerminal> waitForCards(
List<? extends CardTerminal> terminals, long timeout, boolean wantPresent)
throws CardException {
// System.out.println("waitForCards");
// the argument sanity checks are performed in
// javax.smartcardio.TerminalFactory or TerminalImpl
long thisTimeout;
if (timeout == 0) {
timeout = TIMEOUT_INFINITE;
thisTimeout = TIMEOUT_INFINITE;
} else {
// if timeout is not infinite, do the initial call that retrieves
// the status with a 0 timeout. Otherwise, we might get incorrect
// timeout exceptions (seen on Solaris with PC/SC shim)
thisTimeout = 0;
}
String[] names = new String[terminals.size()];
int i = 0;
for (CardTerminal terminal : terminals) {
if (terminal instanceof TerminalImpl == false) {
throw new IllegalArgumentException(
"Invalid terminal type: " + terminal.getClass().getName());
}
TerminalImpl impl = (TerminalImpl) terminal;
names[i++] = impl.name;
}
int[] status = new int[names.length];
Arrays.fill(status, SCARD_STATE_UNAWARE);
try {
while (true) {
// note that we pass "timeout" on each native PC/SC call
// that means that if we end up making multiple (more than 2)
// calls, we might wait too long.
// for now assume that is unlikely and not a problem.
status = SCardGetStatusChange(contextId, thisTimeout, status, names);
thisTimeout = timeout;
List<CardTerminal> results = null;
for (i = 0; i < names.length; i++) {
boolean nowPresent = (status[i] & SCARD_STATE_PRESENT) != 0;
if (nowPresent == wantPresent) {
if (results == null) {
results = new ArrayList<CardTerminal>();
}
results.add(implGetTerminal(names[i]));
}
}
if (results != null) {
return Collections.unmodifiableList(results);
}
}
} catch (PCSCException e) {
if (e.code == SCARD_E_TIMEOUT) {
return Collections.emptyList();
} else {
throw new CardException("waitForCard() failed", e);
}
}
}