/**
* Undoes the execution of this command
*
* @throws CannotDoException the command was not yet executed
* @see Hospital.Factory.Command#undo()
*/
@Override
public String undo() throws CannotDoException {
if (!done) {
throw new CannotDoException("Cannot undo Command");
}
appC.undo();
toAdd.removeMedicalTest(made);
done = false;
return "Undone:\n" + this.toString();
}
/**
* Executes the command by creating the medical test
*
* @return the details of the created medical test
* @throws CannotDoException the command was already executed
*/
@Override
public String execute() throws CannotDoException {
if (done) {
throw new CannotDoException("Cannot undo command, not done yet.");
}
if (made.isResultEntered()) {
throw new CannotDoException("Results already entered, cannot undo.");
}
String out = appC.execute();
toAdd.addMedicalTest(made);
done = true;
return out + "\n" + made.advancedString();
}
/**
* @return the details of the medical test and the patient it was made for
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return made.toString() + "\nPatient: " + toAdd.toString();
}