private void openProcess() {
if (process != null) error("openProcess called but process is already open.");
String processNames[] = {"python2.7", "python", "python2.7.exe", "python.exe"};
final String ENV_VAR = "HYST_PYTHON_PATH";
String loc = null;
for (String processName : processNames) {
try {
loc = FileOperations.locate(processName, processName, ENV_VAR);
Hyst.log("Using python process at path: " + loc);
break;
} catch (FileNotFoundException e) {
Hyst.log(e.getMessage());
}
}
if (loc == null)
error(
"Error starting python process. Is 'python2.7' or 'python' on your PATH or "
+ ENV_VAR
+ "?");
ProcessBuilder pb = new ProcessBuilder(loc, "-i");
String workingDir = getJarBaseDirectory();
pb.directory(new File(workingDir));
try {
process = pb.start();
} catch (IOException e) {
error("Exception while starting python process: " + e.toString());
}
stdout = new BufferedReader(new InputStreamReader(process.getInputStream()));
stderr = new BufferedReader(new InputStreamReader(process.getErrorStream()));
stdin = new OutputStreamWriter(process.getOutputStream());
}
@Override
protected void printAutomaton() {
this.ha = (BaseComponent) config.root;
if (config.forbidden.size() == 0) {
Hyst.log(
"HyComp Printer: using initial states as forbidden states since forbidden states are not defined in model.");
config.forbidden = config.init;
}
// remove this after proper support for multiple initial modes is added
if (config.init.size() != 1)
throw new AutomatonExportException(
"Printer currently only supports single-initial-state models");
// else if (ha.forbidden.size() != 1)
// throw new AutomatonExportException("Printer currently only supports single-forbidden-state
// models");
// transform resets to include identity expressions
new AddIdentityResetPass().runTransformationPass(config, null);
printDocument(originalFilename);
}
/**
* Close the process (if needed), and raise an error
*
* @param description the error description
*/
private void error(String description) {
Hyst.logDebug(description);
close();
throw new AutomatonExportException(description);
}
private static void logDebug(String description) {
Hyst.logDebug(description);
}