public synchronized int connectWithStatus(int technology) {
if (mWatchdog != null) {
mWatchdog.pause();
}
int status = -1;
for (int i = 0; i < mTechList.length; i++) {
if (mTechList[i] == technology) {
// Get the handle and connect, if not already connected
if (mConnectedHandle != mTechHandles[i]) {
// We're not yet connected to this handle, there are
// a few scenario's here:
// 1) We are not connected to anything yet - allow
// 2) We are connected to a technology which has
// a different handle (multi-protocol tag); we support
// switching to that.
if (mConnectedHandle == -1) {
// Not connected yet
status = doConnect(mTechHandles[i]);
} else {
// Connect to a tech with a different handle
status = reconnectWithStatus(mTechHandles[i]);
}
if (status == 0) {
mConnectedHandle = mTechHandles[i];
mConnectedTechIndex = i;
}
} else {
// 1) We are connected to a technology which has the same
// handle; we do not support connecting at a different
// level (libnfc auto-activates to the max level on
// any handle).
// 2) We are connecting to the ndef technology - always
// allowed.
if ((technology == TagTechnology.NDEF) || (technology == TagTechnology.NDEF_FORMATABLE)) {
status = 0;
} else {
if ((technology != TagTechnology.ISO_DEP)
&& (hasTechOnHandle(TagTechnology.ISO_DEP, mTechHandles[i]))) {
// Don't allow to connect a -4 tag at a different level
// than IsoDep, as this is not supported by
// libNFC.
status = -1;
} else {
status = 0;
}
}
if (status == 0) {
mConnectedTechIndex = i;
// Handle was already identical
}
}
break;
}
}
if (mWatchdog != null) {
mWatchdog.doResume();
}
return status;
}
private synchronized int checkNdefWithStatus(int[] ndefinfo) {
if (mWatchdog != null) {
mWatchdog.pause();
}
int status = doCheckNdef(ndefinfo);
if (mWatchdog != null) {
mWatchdog.doResume();
}
return status;
}
public synchronized int reconnectWithStatus(int handle) {
if (mWatchdog != null) {
mWatchdog.pause();
}
int status = doHandleReconnect(handle);
if (mWatchdog != null) {
mWatchdog.doResume();
}
return status;
}
@Override
public synchronized boolean makeReadOnly() {
if (mWatchdog != null) {
mWatchdog.pause();
}
boolean result = doMakeReadonly();
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized boolean formatNdef(byte[] key) {
if (mWatchdog != null) {
mWatchdog.pause();
}
boolean result = doNdefFormat(key);
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized boolean presenceCheck() {
if (mWatchdog != null) {
mWatchdog.pause();
}
boolean result = doPresenceCheck();
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized boolean writeNdef(byte[] buf) {
if (mWatchdog != null) {
mWatchdog.pause();
}
boolean result = doWrite(buf);
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized byte[] readNdef() {
if (mWatchdog != null) {
mWatchdog.pause();
}
byte[] result = doRead();
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized byte[] transceive(byte[] data, boolean raw, int[] returnCode) {
if (mWatchdog != null) {
mWatchdog.pause();
}
byte[] result = doTransceive(data, raw, returnCode);
if (mWatchdog != null) {
mWatchdog.doResume();
}
return result;
}
@Override
public synchronized void startPresenceChecking() {
// Once we start presence checking, we allow the upper layers
// to know the tag is in the field.
mIsPresent = true;
if (mWatchdog == null) {
mWatchdog = new PresenceCheckWatchdog();
mWatchdog.start();
}
}
@Override
public synchronized boolean disconnect() {
boolean result = false;
mIsPresent = false;
if (mWatchdog != null) {
// Watchdog has already disconnected or will do it
mWatchdog.end();
try {
mWatchdog.join();
} catch (InterruptedException e) {
// Should never happen.
}
mWatchdog = null;
result = true;
} else {
result = doDisconnect();
}
mConnectedTechIndex = -1;
mConnectedHandle = -1;
return result;
}