Java Code Examples for org.python.core.PyList#add()

public static PyObject pigToPython(Object object) {
    if (object instanceof Tuple) {
        return pigTupleToPyTuple((Tuple) object);
    } else if (object instanceof DataBag) {
        PyList list = new PyList();
        for (Tuple bagTuple : (DataBag) object) {
            list.add(pigTupleToPyTuple(bagTuple));
        }
        return list;
    } else if (object instanceof Map<?, ?>) {
        PyDictionary newMap = new PyDictionary();
        for (Map.Entry<?, ?> entry : ((Map<?, ?>) object).entrySet()) {
            newMap.put(entry.getKey(), pigToPython(entry.getValue()));
        }
        return newMap;
    } else if (object instanceof DataByteArray) {
        return Py.java2py(((DataByteArray) object).get());
    } else {
        return Py.java2py(object);
    }
}
 

public void setSysArgv(List<String> args) {
  if (null == interpreter) {
    return;
  }
  try {
    PyList pyArgv = interpreter.getSystemState().argv;
    pyArgv.clear();
    for (String arg : args) {
      pyArgv.add(arg);
    }
  } catch (Exception ex) {
    sysArgv = null;
  }
}
 

/** @param path Path to add to head of python search path */
private void addToPythonPath(final String path)
{
    // Since using default PySystemState (see above), check if already in paths
    final PyList paths = python.getSystemState().path;

    // Prevent concurrent modification
    synchronized (JythonScriptSupport.class)
    {
        final int index = paths.indexOf(path);

        // Warn about "examples:/... path that won't really work.
        // Still add to the list so we only get the warning once,
        // plus maybe some day we'll be able to use it...
        if (index < 0  &&
            path.startsWith(ModelResourceUtil.EXAMPLES_SCHEMA + ":"))
            logger.log(Level.WARNING, "Jython will be unable to access scripts in " + path + ". Install examples in file system.");

        // Already top entry?
        if (index == 0)
            return;
        // Remove if further down in the list
        if (index > 0)
            paths.remove(index);
        // Add to front of list
        paths.add(0, path);
    }
    logger.log(Level.FINE, "Adding to jython path: {0}", path);
}
 

@Override
public Object createArray(List elements) {
  PyList list = new PyList();
  for (Object element : elements) {
    list.add(element);
  }
  return list;
}
 

/**
 * Get auto complete list
 *
 * @param command The command
 * @param includeMagic
 * @param includeSingle
 * @param includeDouble
 * @return Auto complete list
 * @throws java.io.IOException
 */
public List<String> getAutoCompleteList(String command, boolean includeMagic,
        boolean includeSingle, boolean includeDouble) throws IOException {
    // Temp KLUDGE here rather than in console.py
    //command += ".";
    if (command.startsWith("import ") || command.startsWith("from ")) {
        String target = getPackageName(command);
        if (target == null) {
            return null;
        }
        return completePackageName(target);
    }
    
    String root = this.getRoot(command, ".");
    if (root.isEmpty())
        return null;
    
    try {
        PyObject object = this.interp.eval(root);
        PyList plist = (PyList) object.__dir__();
        if (plist.contains("__all__")) {
            PyList nPlist = (PyList) object.__getattr__("__all__");
            for (int i = 0; i < nPlist.__len__(); i++) {
                if (! plist.__contains__(nPlist.__getitem__(i))) {
                    plist.add(nPlist.__getitem__(i));
                }
            }
        }
        List<String> list = new ArrayList<>();
        String name;
        for (int i = 0; i < plist.__len__(); i++) {
            name = plist.get(i).toString();
            if (!name.contains("__")) {
                list.add(name);
            }
        }
        return list;
    } catch (Exception e){
        return null;
    }
}
 

PyList getAsList() {
    PyList list = new PyList();
    PyTuple metric = new PyTuple(metricName, new PyTuple(timestamp, metricValue));
    list.add(metric);
    return list;
}
 

/** Perform static, one-time initialization */
private static boolean init()
{
    try
    {
        final Properties pre_props = System.getProperties();
        final Properties props = new Properties();

        // Jython 2.7(b3) needed these to set sys.prefix and sys.executable.
        // Locate the jython plugin for 'home' to allow use of /Lib in there
        // final String home = null; // getPluginPath("org.python.jython", "/");

        // If left undefined, initialization of Lib/site.py fails with
        // posixpath.py", line 394, in normpath AttributeError:
        // 'NoneType' object has no attribute 'startswith'
        // props.setProperty("python.home", home);
        // props.setProperty("python.executable", "None");

        // Disable cachedir to avoid creation of cachedir folder.
        // See http://www.jython.org/jythonbook/en/1.0/ModulesPackages.html#java-package-scanning
        // and http://wiki.python.org/jython/PackageScanning
        props.setProperty(RegistryKey.PYTHON_CACHEDIR_SKIP, "true");

        // By default, Jython compiler creates bytecode files xxx$py.class
        // adjacent to the *.py source file.
        // They are owned by the current user, which typically results in
        // problems for other users, who can either not read them, or not
        // write updates after *.py changes.
        // There is no way to have them be created in a different, per-user directory.
        // C Python honors an environment variable PYTHONDONTWRITEBYTECODE=true to
        // disable its bytecode files, but Jython only checks that in its command line launcher.
        // Use the same environment variable in case it's defined,
        // and default to disabled bytecode, i.e. the safe alternative.
        if (System.getenv("PYTHONDONTWRITEBYTECODE") == null)
            Options.dont_write_bytecode = true;
        else
            Options.dont_write_bytecode = Boolean.parseBoolean(System.getenv("PYTHONDONTWRITEBYTECODE"));

        // With python.home defined, there is no more
        // "ImportError: Cannot import site module and its dependencies: No module named site"
        // Skipping the site import still results in faster startup
        props.setProperty("python.import.site", "false");

        // Prevent: console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0.
        props.setProperty("python.console.encoding", "UTF-8");

        // This will replace entries found on JYTHONPATH
        final String python_path = Preferences.python_path;
        if (! python_path.isEmpty())
            props.setProperty("python.path", python_path);

        // Options: error, warning, message (default), comment, debug
        // props.setProperty("python.verbose", "debug");
        // org.python.core.Options.verbose = Py.DEBUG;

        PythonInterpreter.initialize(pre_props, props, new String[0]);
        final PySystemState state = Py.getSystemState();
        final PyList paths = state.path;

        // Add the examples/connect2j to path.
        // During development, examples are in
        // "file:/some/path/phoebus/applications/display/model/target/classes/examples"
        final String examples = ModelPlugin.class.getResource("/examples").toString();
        if (examples.startsWith("file:"))
            paths.add(examples.substring(5) + "/connect2j");
        // In the compiled version, examples are in
        // "jar:file:/some/path/display-model-0.0.1.jar!/examples"
        else if (examples.startsWith("jar:file:"))
            paths.add(examples.substring(9).replace("jar!/", "jar/") + "/connect2j");
        else
            logger.log(Level.WARNING, "Cannot locate examples/connect2j from " + examples);

        final PyVersionInfo version = PySystemState.version_info;
        logger.log(Level.INFO, "Initial Paths for Jython " + version.major + "." + version.minor + "." + version.micro + ": " + paths);

        // Scripts would sometimes fail in "from ... import ..." with this error:
        //
        // File "..jython-standalone-2.7.1.jar/Lib/warnings.py", line 226, in warn
        // IndexError: index out of range: 0
        //
        // That version of Lib/warnings.py:226 tries to read sys.argv[0],
        // so setting sys.argv[0] avoids the crash.
        // Since state is shared by all scripts in a display,
        // set it to a generic "DisplayBuilderScript"
        state.argv.clear();
        state.argv.add("DisplayBuilderScript");

        return true;
    }
    catch (Exception ex)
    {
        logger.log(Level.SEVERE, "Once this worked OK, but now the Jython initialization failed. Don't you hate computers?", ex);
    }
    return false;
}