/**
* Apply the current scaling transformation to the figure.
*
* @param figure The figure the transformation is to be applied to.
* @exception IllegalActionException If the getToken() method throws such an exception.
*/
protected void _applyTransform(Figure figure) throws IllegalActionException {
double scaleFactorXValue = 1.0;
double scaleFactorYValue = 1.0;
boolean needsTransform = false;
if ((scaleFactorX.isOutsideConnected()) && scaleFactorX.hasToken(0)) {
scaleFactorXValue = ((DoubleToken) scaleFactorX.get(0)).doubleValue();
needsTransform = true;
}
if ((scaleFactorY.isOutsideConnected()) && scaleFactorY.hasToken(0)) {
scaleFactorYValue = ((DoubleToken) scaleFactorY.get(0)).doubleValue();
needsTransform = true;
}
if (needsTransform) {
if (_isAccumulating()) {
scaleFactorXValue *= _oldScaleFactorX;
scaleFactorYValue *= _oldScaleFactorY;
}
_oldScaleFactorX = scaleFactorXValue;
_oldScaleFactorY = scaleFactorYValue;
AffineTransform inputTransform =
AffineTransform.getScaleInstance(scaleFactorXValue, scaleFactorYValue);
figure.transform(inputTransform);
}
}
/**
* If the <i>enable</i> input is connected, then if it has a true token, produce the next output.
* If it is not connected, produce the next output unconditionally. Whether it is connected is
* determined by checking the width of the port.
*
* @exception IllegalActionException If there is no director.
*/
public void fire() throws IllegalActionException {
super.fire();
if ((!enable.isOutsideConnected())
|| (enable.hasToken(0) && ((BooleanToken) enable.get(0)).booleanValue())) {
ArrayToken valuesArray = (ArrayToken) values.getToken();
if (_currentIndex < valuesArray.length()) {
output.send(0, valuesArray.getElement(_currentIndex));
_outputProduced = true;
}
}
}
/**
* Perform a multiway rendezvous with all input channels, collect one input token from each
* channel, and then perform a multiway rendezvous with the output channels, providing that data.
*
* @exception IllegalActionException If the input width is zero.
* @exception TerminateProcessException If the process termination is requested by the director.
*/
public void fire() throws IllegalActionException {
super.fire();
if (_debugging && _VERBOSE_DEBUGGING) {
if (!_listeningToBranchController) {
_branchController.addDebugListener(this);
_listeningToBranchController = true;
}
} else {
_branchController.removeDebugListener(this);
_listeningToBranchController = false;
}
if (!input.isOutsideConnected()) {
throw new IllegalActionException(this, "Barrier requires at least one input.");
}
ConditionalBranch[] branches = new ConditionalBranch[input.getWidth()];
for (int i = 0; i < input.getWidth(); i++) {
// The branch has channel i and ID i.
branches[i] = new ConditionalReceive(input, i, i);
if (_debugging && _VERBOSE_DEBUGGING) {
branches[i].addDebugListener(this);
}
}
if (_debugging) {
_debug("Performing multiway rendezvous on the input channels.");
}
if (!_branchController.executeBranches(branches)) {
if (_debugging) {
_debug("At least one input rendezvous was terminated.");
}
_terminate = true;
return;
}
if (_debugging) {
_debug("Input channels completed.");
if (_VERBOSE_DEBUGGING) {
for (ConditionalBranch branche : branches) {
branche.removeDebugListener(this);
}
}
}
Token[] data = new Token[input.getWidth()];
for (int i = 0; i < input.getWidth(); i++) {
data[i] = branches[i].getToken();
if (_debugging) {
_debug("Completed read input from channel " + i + ": " + data[i]);
}
if (data[i] == null) {
throw new InternalErrorException("Input data is null!");
}
}
if (output.isOutsideConnected()) {
branches = new ConditionalBranch[output.getWidth()];
Token token = null;
for (int i = 0; i < output.getWidth(); i++) {
if (i < input.getWidth()) {
token = data[i];
}
if (_debugging) {
_debug("Sending output to channel " + i + ": " + token);
}
branches[i] = new ConditionalSend(output, i, i, token);
if (_debugging && _VERBOSE_DEBUGGING) {
branches[i].addDebugListener(this);
}
}
if (_debugging) {
_debug("Performing multiway rendezvous on the output channels.");
}
if (_branchController.executeBranches(branches)) {
if (_debugging) {
_debug("Output channels completed.");
}
} else {
if (_debugging) {
_debug("Output channels failed.");
}
}
if (_debugging && _VERBOSE_DEBUGGING) {
for (ConditionalBranch branche : branches) {
branche.removeDebugListener(this);
}
}
}
}
/**
* If the input width is greater than zero and it has not already been done, start a thread to
* read a token from the <i>release</i> input port and store it in the pool. Then, in the calling
* thread, if there is at least one resource in the pool, write the first resource in the pool to
* any <i>grant</i> output channel.
*
* @exception IllegalActionException If an error occurs during executing the process.
* @exception TerminateProcessException If the process termination is requested by the director.
*/
public void fire() throws IllegalActionException {
super.fire();
final RendezvousDirector director = (RendezvousDirector) getDirector();
final Thread writeThread = Thread.currentThread();
if (!(getDirector() instanceof RendezvousDirector)) {
throw new IllegalActionException(
this, "ResourcePool actor can only be used with RendezvousDirector.");
}
_postfireReturns = true;
if (release.isOutsideConnected() && _readThread == null) {
_readThread =
new Thread(getFullName() + "_readThread") {
public void run() {
try {
while (!_stopRequested) {
// Synchronize on the director since all read/write
// operations do.
synchronized (director) {
if (_debugging) {
_debug("Resources available: " + _pool);
}
Token resource =
RendezvousReceiver.getFromAny(release.getReceivers(), director);
_pool.add(resource);
director.threadUnblocked(writeThread, null);
director.notifyAll();
}
}
} catch (TerminateProcessException ex) {
// OK, just exit
_postfireReturns = false;
} finally {
director.removeThread(_readThread);
}
}
};
director.addThread(_readThread);
_readThread.start();
} else if (!release.isOutsideConnected() && _readThread != null) {
// A mutation has eliminated the sources.
_readThread.interrupt();
}
// Synchronize on the director since all read/write
// operations do.
synchronized (director) {
while (_pool.size() == 0) {
if (_stopRequested || !_postfireReturns) {
_postfireReturns = false;
return;
}
try {
director.threadBlocked(writeThread, null);
RendezvousReceiver.waitForChange(director);
} catch (TerminateProcessException ex) {
_postfireReturns = false;
return;
} finally {
director.threadUnblocked(writeThread, null);
}
}
// There is a token.
Token token = (Token) _pool.get(0);
// If this put blocks for any reason, it will block on
// a director.wait(), so the lock will not be held.
try {
RendezvousReceiver.putToAny(token, grant.getRemoteReceivers(), director);
} catch (TerminateProcessException e) {
_postfireReturns = false;
return;
}
_pool.remove(0);
}
}
