Program: 153907
Project: 153907
Buggy source:
@Override public void actionPerformed(final ActionEvent e){
  actionCommands actionCommand=actionCommands.valueOf(e.getActionCommand());
switch (actionCommand) {
case ADD_PRODUCT:
    acquirePermit();
  addProduct();
isChanged=true;
releasePermit();
break;
case ON_OFFLINE:
if (view.isOnline()) {
setStatus("String_Node_Str");
if (model.getUserdata() == null) {
String[] userdata=PopupDialog.showDialog(view);
model.setUserdata(userdata);
}
view.setOnline(view.isOnline());
try {
model.setOnline(view.isOnline());
}
 catch (UnknownHostException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
model.setUserdata(null);
view.setOnline(false);
}
catch (IOException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
model.setUserdata(null);
view.setOnline(false);
}
if (model.getUserdata() != null && (worker == null || worker.getState() == SwingWorker.StateValue.DONE)) {
try {
worker=new DateWorker(view,model.getUserdata()[2],6667);
worker.execute();
}
 catch (SocketException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str");
}
catch (UnknownHostException e2) {
JOptionPane.showMessageDialog(view,"String_Node_Str");
}
}
setStatus("String_Node_Str");
}
 else {
setStatus("String_Node_Str");
if (worker != null) {
worker.cancel(false);
}
view.setDate("String_Node_Str");
view.setOnline(view.isOnline());
try {
model.setOnline(view.isOnline());
}
 catch (UnknownHostException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
}
catch (IOException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
}
setStatus("String_Node_Str");
}
break;
case SAVE:
if (isChanged) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
break;
case SAVE_AS:
acquirePermit();
productListDelegate.saveProductListAs(model.getStorage());
break;
case OPEN:
if (isChanged) {
int choice=JOptionPane.showConfirmDialog(view,"String_Node_Str","String_Node_Str",JOptionPane.OK_CANCEL_OPTION);
if (choice == JOptionPane.OK_OPTION) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
}
acquirePermit();
productListDelegate.openProductList();
break;
case INSERT:
acquirePermit();
dbDelegate.insertIntoDB();
break;
case QUERY:
if (isChanged) {
int choice=JOptionPane.showConfirmDialog(view,"String_Node_Str","String_Node_Str",JOptionPane.OK_CANCEL_OPTION);
if (choice == JOptionPane.OK_OPTION) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
}
acquirePermit();
dbDelegate.readFromDB();
break;
}
}

Fixed version (ground truth):
@Override public void actionPerformed(final ActionEvent e){
  actionCommands actionCommand=actionCommands.valueOf(e.getActionCommand());
switch (actionCommand) {
case ADD_PRODUCT:
    acquirePermit();
  addProduct();
isChanged=true;
releasePermit();
break;
case ON_OFFLINE:
if (view.isOnline()) {
setStatus("String_Node_Str");
if (model.getUserdata() == null) {
String[] userdata=PopupDialog.showDialog(view);
model.setUserdata(userdata);
}
view.setOnline(view.isOnline());
try {
model.setOnline(view.isOnline());
}
 catch (UnknownHostException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
model.setUserdata(null);
view.setOnline(false);
}
catch (IOException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
model.setUserdata(null);
view.setOnline(false);
}
if (model.isOnline() && (worker == null || worker.getState() == SwingWorker.StateValue.DONE)) {
try {
String[] userdata=model.getUserdata();
if (userdata == null || userdata.length < 2) {
  userdata=new String[]{"String_Node_Str","String_Node_Str","String_Node_Str"};
}
worker=new DateWorker(view,userdata[2],6667);
worker.execute();
}
 catch (SocketException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str");
}
catch (UnknownHostException e2) {
JOptionPane.showMessageDialog(view,"String_Node_Str");
}
}
setStatus("String_Node_Str");
}
 else {
setStatus("String_Node_Str");
if (worker != null) {
worker.cancel(false);
}
view.setDate("String_Node_Str");
view.setOnline(view.isOnline());
try {
model.setOnline(view.isOnline());
}
 catch (UnknownHostException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
}
catch (IOException e1) {
JOptionPane.showMessageDialog(view,"String_Node_Str" + "String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
}
setStatus("String_Node_Str");
}
break;
case SAVE:
if (isChanged) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
break;
case SAVE_AS:
acquirePermit();
productListDelegate.saveProductListAs(model.getStorage());
break;
case OPEN:
if (isChanged) {
int choice=JOptionPane.showConfirmDialog(view,"String_Node_Str","String_Node_Str",JOptionPane.OK_CANCEL_OPTION);
if (choice == JOptionPane.OK_OPTION) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
}
acquirePermit();
productListDelegate.openProductList();
break;
case INSERT:
acquirePermit();
dbDelegate.insertIntoDB();
break;
case QUERY:
if (isChanged) {
int choice=JOptionPane.showConfirmDialog(view,"String_Node_Str","String_Node_Str",JOptionPane.OK_CANCEL_OPTION);
if (choice == JOptionPane.OK_OPTION) {
acquirePermit();
productListDelegate.saveProductList(model.getStorage());
}
}
acquirePermit();
dbDelegate.readFromDB();
break;
}
}