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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
// Copyright (c) Corporation for National Research Initiatives
package org.python.core;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import java.security.AccessControlException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.jruby.ext.posix.util.Platform;
import org.python.Version;
import org.python.core.adapter.ClassicPyObjectAdapter;
import org.python.core.adapter.ExtensiblePyObjectAdapter;
import org.python.core.packagecache.PackageManager;
import org.python.core.packagecache.SysPackageManager;
import org.python.modules.Setup;
import org.python.modules.zipimport.zipimporter;
import org.python.util.Generic;
/**
* The "sys" module.
*/
// xxx Many have lamented, this should really be a module!
// but it will require some refactoring to see this wish come true.
public class PySystemState extends PyObject
{
public static final String PYTHON_CACHEDIR = "python.cachedir";
public static final String PYTHON_CACHEDIR_SKIP = "python.cachedir.skip";
public static final String PYTHON_CONSOLE_ENCODING = "python.console.encoding";
protected static final String CACHEDIR_DEFAULT_NAME = "cachedir";
public static final String JYTHON_JAR = "jython.jar";
public static final String JYTHON_DEV_JAR = "jython-dev.jar";
private static final String JAR_URL_PREFIX = "jar:file:";
private static final String JAR_SEPARATOR = "!";
public static final PyString version = new PyString(Version.getVersion());
public static final int hexversion = ((Version.PY_MAJOR_VERSION << 24) |
(Version.PY_MINOR_VERSION << 16) |
(Version.PY_MICRO_VERSION << 8) |
(Version.PY_RELEASE_LEVEL << 4) |
(Version.PY_RELEASE_SERIAL << 0));
public static PyTuple version_info;
public final static int maxunicode = 1114111;
public static PyTuple subversion;
/**
* The copyright notice for this release.
*/
public static final PyObject copyright = Py.newString(
"Copyright (c) 2000-2009 Jython Developers.\n" +
"All rights reserved.\n\n" +
"Copyright (c) 2000 BeOpen.com.\n" +
"All Rights Reserved.\n\n"+
"Copyright (c) 2000 The Apache Software Foundation.\n" +
"All rights reserved.\n\n" +
"Copyright (c) 1995-2000 Corporation for National Research "+
"Initiatives.\n" +
"All Rights Reserved.\n\n" +
"Copyright (c) 1991-1995 Stichting Mathematisch Centrum, " +
"Amsterdam.\n" +
"All Rights Reserved.");
private static Map builtinNames;
public static PyTuple builtin_module_names = null;
public static PackageManager packageManager;
private static File cachedir;
private static PyList defaultPath;
private static PyList defaultArgv;
private static PyObject defaultExecutable;
// XXX - from Jython code, these statics are immutable; we may wish to consider
// using the shadowing mechanism for them as well if in practice it makes
// sense for them to be changed
public static Properties registry; // = init_registry();
public static PyObject prefix;
public static PyObject exec_prefix = Py.EmptyString;
public static final PyString byteorder = new PyString("big");
public static final int maxint = Integer.MAX_VALUE;
public static final int minint = Integer.MIN_VALUE;
private static boolean initialized = false;
/** The arguments passed to this program on the command line. */
public PyList argv = new PyList();
public PyObject modules;
public PyList path;
// shadowed statics - don't use directly
public static PyList warnoptions = new PyList();
public static PyObject builtins;
public static PyObject platform = new PyString("java");
public PyList meta_path;
public PyList path_hooks;
public PyObject path_importer_cache;
public PyObject ps1 = new PyString(">>> ");
public PyObject ps2 = new PyString("... ");
public PyObject executable;
private String currentWorkingDir;
private PyObject environ;
private ClassLoader classLoader = null;
public PyObject stdout, stderr, stdin;
public PyObject __stdout__, __stderr__, __stdin__;
public PyObject __displayhook__, __excepthook__;
public PyObject last_value = Py.None;
public PyObject last_type = Py.None;
public PyObject last_traceback = Py.None;
public PyObject __name__ = new PyString("sys");
public PyObject __dict__;
private int recursionlimit = 1000;
public PySystemState() {
initialize();
modules = new PyStringMap();
argv = (PyList)defaultArgv.repeat(1);
path = (PyList)defaultPath.repeat(1);
path.append(Py.newString(JavaImporter.JAVA_IMPORT_PATH_ENTRY));
path.append(Py.newString(ClasspathPyImporter.PYCLASSPATH_PREFIX));
executable = defaultExecutable;
meta_path = new PyList();
path_hooks = new PyList();
path_hooks.append(new JavaImporter());
path_hooks.append(zipimporter.TYPE);
path_hooks.append(ClasspathPyImporter.TYPE);
path_importer_cache = new PyDictionary();
currentWorkingDir = new File("").getAbsolutePath();
initEnviron();
// Set up the initial standard ins and outs
String mode = Options.unbuffered ? "b" : "";
int buffering = Options.unbuffered ? 0 : 1;
stdin = __stdin__ = new PyFile(System.in, "", "r" + mode, buffering, false);
stdout = __stdout__ = new PyFile(System.out, "", "w" + mode, buffering, false);
stderr = __stderr__ = new PyFile(System.err, "", "w" + mode, 0, false);
if (Py.getSystemState() != null) {
// XXX: initEncoding fails without an existing sys module as it can't import
// os (for os.isatty). In that case PySystemState.doInitialize calls it for
// us. The correct fix for this is rewriting the posix/nt module portions of
// os in Java
initEncoding();
}
__displayhook__ = new PySystemStateFunctions("displayhook", 10, 1, 1);
__excepthook__ = new PySystemStateFunctions("excepthook", 30, 3, 3);
if (builtins == null) {
builtins = getDefaultBuiltins();
}
modules.__setitem__("__builtin__", new PyModule("__builtin__", getDefaultBuiltins()));
__dict__ = new PyStringMap();
__dict__.invoke("update", getType().fastGetDict());
__dict__.__setitem__("displayhook", __displayhook__);
__dict__.__setitem__("excepthook", __excepthook__);
}
void reload() throws PyIgnoreMethodTag {
__dict__.invoke("update", getType().fastGetDict());
}
private static void checkReadOnly(String name) {
if (name == "__dict__" ||
name == "__class__" ||
name == "registry" ||
name == "exec_prefix" ||
name == "packageManager") {
throw Py.TypeError("readonly attribute");
}
}
private static void checkMustExist(String name) {
if (name == "__dict__" ||
name == "__class__" ||
name == "registry" ||
name == "exec_prefix" ||
name == "platform" ||
name == "packageManager" ||
name == "builtins" ||
name == "warnoptions") {
throw Py.TypeError("readonly attribute");
}
}
private void initEncoding() {
String encoding = registry.getProperty(PYTHON_CONSOLE_ENCODING);
if (encoding == null) {
return;
}
for (PyFile stdStream : new PyFile[] {(PyFile)this.stdin, (PyFile)this.stdout,
(PyFile)this.stderr}) {
if (stdStream.isatty()) {
stdStream.encoding = encoding;
}
}
}
// might be nice to have something general here, but for now these
// seem to be the only values that need to be explicitly shadowed
private Shadow shadowing;
public synchronized void shadow() {
if (shadowing == null) {
shadowing = new Shadow();
}
}
private static class DefaultBuiltinsHolder {
static final PyObject builtins = fillin();
static PyObject fillin() {
PyObject temp = new PyStringMap();
__builtin__.fillWithBuiltins(temp);
return temp;
}
}
public static PyObject getDefaultBuiltins() {
return DefaultBuiltinsHolder.builtins;
}
public synchronized PyObject getBuiltins() {
if (shadowing == null) {
return getDefaultBuiltins();
} else {
return shadowing.builtins;
}
}
public synchronized void setBuiltins(PyObject value) {
if (shadowing == null) {
builtins = value;
} else {
shadowing.builtins = value;
}
modules.__setitem__("__builtin__", new PyModule("__builtin__", value));
}
public synchronized PyObject getWarnoptions() {
if (shadowing == null) {
return warnoptions;
} else {
return shadowing.warnoptions;
}
}
public synchronized void setWarnoptions(PyObject value) {
if (shadowing == null) {
warnoptions = new PyList(value);
} else {
shadowing.warnoptions = new PyList(value);
}
}
public synchronized PyObject getPlatform() {
if (shadowing == null) {
return platform;
} else {
return shadowing.platform;
}
}
public synchronized void setPlatform(PyObject value) {
if (shadowing == null) {
platform = value;
} else {
shadowing.platform = value;
}
}
// xxx fix this accessors
public PyObject __findattr_ex__(String name) {
if (name == "exc_value") {
PyException exc = Py.getThreadState().exception;
if (exc == null) {
return null;
}
return exc.value;
} else if (name == "exc_type") {
PyException exc = Py.getThreadState().exception;
if (exc == null) {
return null;
}
return exc.type;
} else if (name == "exc_traceback") {
PyException exc = Py.getThreadState().exception;
if (exc == null) {
return null;
}
return exc.traceback;
} else if (name == "warnoptions") {
return getWarnoptions();
} else if (name == "builtins") {
return getBuiltins();
} else if (name == "platform") {
return getPlatform();
} else {
PyObject ret = super.__findattr_ex__(name);
if (ret != null) {
if (ret instanceof PyMethod) {
if (__dict__.__finditem__(name) instanceof PyReflectedFunction) {
return ret; // xxx depends on nonstandard __dict__
}
} else if (ret == PyAttributeDeleted.INSTANCE) {
return null;
} else {
return ret;
}
}
return __dict__.__finditem__(name);
}
}
public void __setattr__(String name, PyObject value) {
checkReadOnly(name);
if (name == "builtins") {
shadow();
setBuiltins(value);
} else if (name == "warnoptions") {
shadow();
setWarnoptions(value);
} else if (name == "platform") {
shadow();
setPlatform(value);
} else {
PyObject ret = getType().lookup(name); // xxx fix fix fix
if (ret != null && ret._doset(this, value)) {
return;
}
__dict__.__setitem__(name, value);
}
}
public void __delattr__(String name) {
checkMustExist(name);
PyObject ret = getType().lookup(name); // xxx fix fix fix
if (ret != null) {
ret._doset(this, PyAttributeDeleted.INSTANCE);
}
try {
__dict__.__delitem__(name);
} catch (PyException pye) { // KeyError
if (ret == null) {
throw Py.AttributeError(name);
}
}
}
// xxx
public void __rawdir__(PyDictionary accum) {
accum.update(__dict__);
}
public String toString() {
return "";
}
public int getrecursionlimit() {
return recursionlimit;
}
public void setrecursionlimit(int recursionlimit) {
if(recursionlimit <= 0) {
throw Py.ValueError("Recursion limit must be positive");
}
this.recursionlimit = recursionlimit;
}
public void settrace(PyObject tracefunc) {
ThreadState ts = Py.getThreadState();
if (tracefunc == Py.None) {
ts.tracefunc = null;
} else {
ts.tracefunc = new PythonTraceFunction(tracefunc);
}
}
public void setprofile(PyObject profilefunc) {
ThreadState ts = Py.getThreadState();
if (profilefunc == Py.None) {
ts.profilefunc = null;
} else {
ts.profilefunc = new PythonTraceFunction(profilefunc);
}
}
public PyString getdefaultencoding() {
return new PyString(codecs.getDefaultEncoding());
}
public void setdefaultencoding(String encoding) {
codecs.setDefaultEncoding(encoding);
}
public PyObject getfilesystemencoding() {
return Py.None;
}
/**
* Initialize the environ dict from System.getenv. environ may be empty when the
* security policy doesn't grant us access.
*/
public void initEnviron() {
environ = new PyDictionary();
Map env;
try {
env = System.getenv();
} catch (SecurityException se) {
return;
}
for (Map.Entry entry : env.entrySet()) {
environ.__setitem__(Py.newString(entry.getKey()), Py.newString(entry.getValue()));
}
}
public PyObject getEnviron() {
return environ;
}
/**
* Change the current working directory to the specified path.
*
* path is assumed to be absolute and canonical (via
* os.path.realpath).
*
* @param path a path String
*/
public void setCurrentWorkingDir(String path) {
currentWorkingDir = path;
}
/**
* Return a string representing the current working directory.
*
* @return a path String
*/
public String getCurrentWorkingDir() {
return currentWorkingDir;
}
/**
* Resolve a path. Returns the full path taking the current
* working directory into account.
*
* @param path a path String
* @return a resolved path String
*/
public String getPath(String path) {
return getPath(this, path);
}
/**
* Resolve a path. Returns the full path taking the current
* working directory into account.
*
* Like getPath but called statically. The current PySystemState
* is only consulted for the current working directory when it's
* necessary (when the path is relative).
*
* @param path a path String
* @return a resolved path String
*/
public static String getPathLazy(String path) {
// XXX: This method likely an unnecessary optimization
return getPath(null, path);
}
private static String getPath(PySystemState sys, String path) {
if (path == null) {
return path;
}
File file = new File(path);
// Python considers r'\Jython25' and '/Jython25' abspaths on Windows, unlike
// java.io.File
if (!file.isAbsolute() && (!Platform.IS_WINDOWS
|| !(path.startsWith("\\") || path.startsWith("/")))) {
if (sys == null) {
sys = Py.getSystemState();
}
file = new File(sys.getCurrentWorkingDir(), path);
}
// This needs to be performed always to trim trailing backslashes on Windows
return file.getPath();
}
public void callExitFunc() throws PyIgnoreMethodTag {
PyObject exitfunc = __findattr__("exitfunc");
if (exitfunc != null) {
try {
exitfunc.__call__();
} catch (PyException exc) {
if (!exc.match(Py.SystemExit)) {
Py.println(stderr,
Py.newString("Error in sys.exitfunc:"));
}
Py.printException(exc);
}
}
Py.flushLine();
}
public ClassLoader getClassLoader() {
return classLoader;
}
public void setClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
private static String findRoot(Properties preProperties,
Properties postProperties,
String jarFileName)
{
String root = null;
try {
if (postProperties != null)
root = postProperties.getProperty("python.home");
if (root == null)
root = preProperties.getProperty("python.home");
if (root == null)
root = preProperties.getProperty("install.root");
determinePlatform(preProperties);
} catch (Exception exc) {
return null;
}
// If install.root is undefined find JYTHON_JAR in class.path
if (root == null) {
String classpath = preProperties.getProperty("java.class.path");
if (classpath != null) {
String lowerCaseClasspath = classpath.toLowerCase();
int jarIndex = lowerCaseClasspath.indexOf(JYTHON_JAR);
if (jarIndex < 0) {
jarIndex = lowerCaseClasspath.indexOf(JYTHON_DEV_JAR);
}
if (jarIndex >= 0) {
int start = classpath.lastIndexOf(File.pathSeparator, jarIndex) + 1;
root = classpath.substring(start, jarIndex);
} else if (jarFileName != null) {
// in case JYTHON_JAR is referenced from a MANIFEST inside another jar on the
// classpath
root = new File(jarFileName).getParent();
}
}
}
if (root == null) {
return null;
}
File rootFile = new File(root);
try {
return rootFile.getCanonicalPath();
} catch (IOException ioe) {
return rootFile.getAbsolutePath();
}
}
public static void determinePlatform(Properties props) {
String version = props.getProperty("java.version");
if (version == null) {
version = "???";
}
String lversion = version.toLowerCase();
if (lversion.startsWith("java")) {
version = version.substring(4, version.length());
}
if (lversion.startsWith("jdk") || lversion.startsWith("jre")) {
version = version.substring(3, version.length());
}
if (version.equals("12")) {
version = "1.2";
}
platform = new PyString("java" + version);
}
private static void initRegistry(Properties preProperties, Properties postProperties,
boolean standalone, String jarFileName)
{
if (registry != null) {
Py.writeError("systemState", "trying to reinitialize registry");
return;
}
registry = preProperties;
String prefix = findRoot(preProperties, postProperties, jarFileName);
String exec_prefix = prefix;
// Load the default registry
if (prefix != null) {
if (prefix.length() == 0) {
prefix = exec_prefix = ".";
}
try {
// user registry has precedence over installed registry
File homeFile = new File(registry.getProperty("user.home"), ".jython");
addRegistryFile(homeFile);
addRegistryFile(new File(prefix, "registry"));
} catch (Exception exc) {
}
}
if (prefix != null) {
PySystemState.prefix = Py.newString(prefix);
}
if (exec_prefix != null) {
PySystemState.exec_prefix = Py.newString(exec_prefix);
}
try {
String jythonpath = System.getenv("JYTHONPATH");
if (jythonpath != null) {
registry.setProperty("python.path", jythonpath);
}
} catch (SecurityException e) {
}
registry.putAll(postProperties);
if (standalone) {
// set default standalone property (if not yet set)
if (!registry.containsKey(PYTHON_CACHEDIR_SKIP)) {
registry.put(PYTHON_CACHEDIR_SKIP, "true");
}
}
if (!registry.containsKey(PYTHON_CONSOLE_ENCODING)) {
String encoding;
try {
encoding = System.getProperty("file.encoding");
} catch (SecurityException se) {
encoding = null;
}
if (encoding != null) {
registry.put(PYTHON_CONSOLE_ENCODING, encoding);
}
}
// Set up options from registry
Options.setFromRegistry();
}
private static void addRegistryFile(File file) {
if (file.exists()) {
if (!file.isDirectory()) {
// pre (e.g. system) properties should override the registry,
// therefore only add missing properties from this registry file
Properties fileProperties = new Properties();
try {
FileInputStream fp = new FileInputStream(file);
try {
fileProperties.load(fp);
for (Entry kv : fileProperties.entrySet()) {
Object key = kv.getKey();
if (!registry.containsKey(key)) {
registry.put(key, kv.getValue());
}
}
} finally {
fp.close();
}
} catch (IOException e) {
System.err.println("couldn't open registry file: " + file.toString());
}
} else {
System.err.println("warning: " + file.toString() + " is a directory, not a file");
}
}
}
public static Properties getBaseProperties() {
try {
return System.getProperties();
} catch (AccessControlException ace) {
return new Properties();
}
}
public static synchronized void initialize() {
initialize(null, null);
}
public static synchronized void initialize(Properties preProperties, Properties postProperties) {
initialize(preProperties, postProperties, new String[] {""});
}
public static synchronized void initialize(Properties preProperties,
Properties postProperties,
String[] argv) {
initialize(preProperties, postProperties, argv, null);
}
public static synchronized void initialize(Properties preProperties,
Properties postProperties,
String[] argv,
ClassLoader classLoader) {
initialize(preProperties, postProperties, argv, classLoader, new ClassicPyObjectAdapter());
}
public static synchronized void initialize(Properties preProperties,
Properties postProperties,
String[] argv,
ClassLoader classLoader,
ExtensiblePyObjectAdapter adapter) {
if (initialized) {
return;
}
if (preProperties == null) {
preProperties = getBaseProperties();
}
if (postProperties == null) {
postProperties = new Properties();
}
try {
ClassLoader context = Thread.currentThread().getContextClassLoader();
if (context != null) {
if (initialize(preProperties, postProperties, argv, classLoader, adapter, context)) {
return;
}
} else {
Py.writeDebug("initializer", "Context class loader null, skipping");
}
ClassLoader sysStateLoader = PySystemState.class.getClassLoader();
if (sysStateLoader != null) {
if (initialize(preProperties,
postProperties,
argv,
classLoader,
adapter,
sysStateLoader)) {
return;
}
} else {
Py.writeDebug("initializer", "PySystemState.class class loader null, skipping");
}
} catch (UnsupportedCharsetException e) {
Py.writeWarning("initializer", "Unable to load the UTF-8 charset to read an initializer definition");
e.printStackTrace(System.err);
} catch (SecurityException e) {
// Must be running in a security environment that doesn't allow access to the class
// loader
} catch (Exception e) {
Py.writeWarning("initializer",
"Unexpected exception thrown while trying to use initializer service");
e.printStackTrace(System.err);
}
doInitialize(preProperties, postProperties, argv, classLoader, adapter);
}
private static final String INITIALIZER_SERVICE =
"META-INF/services/org.python.core.JythonInitializer";
/**
* Attempts to read a SystemStateInitializer service from the given classloader, instantiate it,
* and initialize with it.
*
* @throws UnsupportedCharsetException
* if unable to load UTF-8 to read a service definition
* @return true if a service is found and successfully initializes.
*/
private static boolean initialize(Properties pre,
Properties post,
String[] argv,
ClassLoader sysClassLoader,
ExtensiblePyObjectAdapter adapter,
ClassLoader initializerClassLoader) {
InputStream in = initializerClassLoader.getResourceAsStream(INITIALIZER_SERVICE);
if (in == null) {
Py.writeDebug("initializer", "'" + INITIALIZER_SERVICE + "' not found on " + initializerClassLoader);
return false;
}
BufferedReader r = new BufferedReader(new InputStreamReader(in, Charset.forName("UTF-8")));
String className;
try {
className = r.readLine();
} catch (IOException e) {
Py.writeWarning("initializer", "Failed reading '" + INITIALIZER_SERVICE + "' from "
+ initializerClassLoader);
e.printStackTrace(System.err);
return false;
}
Class initializer;
try {
initializer = initializerClassLoader.loadClass(className);
} catch (ClassNotFoundException e) {
Py.writeWarning("initializer", "Specified initializer class '" + className
+ "' not found, continuing");
return false;
}
try {
((JythonInitializer)initializer.newInstance()).initialize(pre,
post,
argv,
sysClassLoader,
adapter);
} catch (Exception e) {
Py.writeWarning("initializer", "Failed initializing with class '" + className
+ "', continuing");
e.printStackTrace(System.err);
return false;
}
if (!initialized) {
Py.writeWarning("initializer", "Initializer '" + className
+ "' failed to call doInitialize, using default initialization");
}
return initialized;
}
public static synchronized PySystemState doInitialize(Properties preProperties,
Properties postProperties,
String[] argv,
ClassLoader classLoader,
ExtensiblePyObjectAdapter adapter) {
if (initialized) {
return Py.defaultSystemState;
}
initialized = true;
Py.setAdapter(adapter);
boolean standalone = false;
String jarFileName = getJarFileName();
if (jarFileName != null) {
standalone = isStandalone(jarFileName);
}
// initialize the Jython registry
initRegistry(preProperties, postProperties, standalone, jarFileName);
// other initializations
initBuiltins(registry);
initStaticFields();
// Initialize the path (and add system defaults)
defaultPath = initPath(registry, standalone, jarFileName);
defaultArgv = initArgv(argv);
defaultExecutable = initExecutable(registry);
// Set up the known Java packages
initPackages(registry);
// Finish up standard Python initialization...
Py.defaultSystemState = new PySystemState();
Py.setSystemState(Py.defaultSystemState);
if (classLoader != null) {
Py.defaultSystemState.setClassLoader(classLoader);
}
Py.initClassExceptions(getDefaultBuiltins());
// defaultSystemState can't init its own encoding, see its constructor
Py.defaultSystemState.initEncoding();
// Make sure that Exception classes have been loaded
new PySyntaxError("", 1, 1, "", "");
return Py.defaultSystemState;
}
private static void initStaticFields() {
Py.None = new PyNone();
Py.NotImplemented = new PyNotImplemented();
Py.NoKeywords = new String[0];
Py.EmptyObjects = new PyObject[0];
Py.EmptyTuple = new PyTuple(Py.EmptyObjects);
Py.EmptyFrozenSet = new PyFrozenSet();
Py.NoConversion = new PySingleton("Error");
Py.Ellipsis = new PyEllipsis();
Py.Zero = new PyInteger(0);
Py.One = new PyInteger(1);
Py.False = new PyBoolean(false);
Py.True = new PyBoolean(true);
Py.EmptyString = new PyString("");
Py.Newline = new PyString("\n");
Py.Space = new PyString(" ");
// Setup standard wrappers for stdout and stderr...
Py.stderr = new StderrWrapper();
Py.stdout = new StdoutWrapper();
String s;
if(Version.PY_RELEASE_LEVEL == 0x0A)
s = "alpha";
else if(Version.PY_RELEASE_LEVEL == 0x0B)
s = "beta";
else if(Version.PY_RELEASE_LEVEL == 0x0C)
s = "candidate";
else if(Version.PY_RELEASE_LEVEL == 0x0F)
s = "final";
else if(Version.PY_RELEASE_LEVEL == 0xAA)
s = "snapshot";
else
throw new RuntimeException("Illegal value for PY_RELEASE_LEVEL: " +
Version.PY_RELEASE_LEVEL);
version_info = new PyTuple(Py.newInteger(Version.PY_MAJOR_VERSION),
Py.newInteger(Version.PY_MINOR_VERSION),
Py.newInteger(Version.PY_MICRO_VERSION),
Py.newString(s),
Py.newInteger(Version.PY_RELEASE_SERIAL));
subversion = new PyTuple(Py.newString("Jython"), Py.newString(Version.BRANCH),
Py.newString(Version.SVN_REVISION));
}
public static boolean isPackageCacheEnabled() {
return cachedir != null;
}
private static void initCacheDirectory(Properties props) {
String skip = props.getProperty(PYTHON_CACHEDIR_SKIP, "false");
if (skip.equalsIgnoreCase("true")) {
cachedir = null;
return;
}
cachedir = new File(props.getProperty(PYTHON_CACHEDIR, CACHEDIR_DEFAULT_NAME));
if (!cachedir.isAbsolute()) {
cachedir = new File(prefix == null ? null : prefix.toString(), cachedir.getPath());
}
}
private static void initPackages(Properties props) {
initCacheDirectory(props);
File pkgdir;
if (cachedir != null) {
pkgdir = new File(cachedir, "packages");
} else {
pkgdir = null;
}
packageManager = new SysPackageManager(pkgdir, props);
}
private static PyList initArgv(String[] args) {
PyList argv = new PyList();
if (args != null) {
for (String arg : args) {
argv.append(new PyString(arg));
}
}
return argv;
}
/**
* Determine the default sys.executable value from the
* registry. Returns Py.None is no executable can be found.
*
* @param props a Properties registry
* @return a PyObject path string or Py.None
*/
private static PyObject initExecutable(Properties props) {
String executable = props.getProperty("python.executable");
if (executable == null) {
return Py.None;
}
File executableFile = new File(executable);
try {
executableFile = executableFile.getCanonicalFile();
} catch (IOException ioe) {
executableFile = executableFile.getAbsoluteFile();
}
if (!executableFile.isFile()) {
return Py.None;
}
return new PyString(executableFile.getPath());
}
private static void addBuiltin(String name) {
String classname;
String modname;
int colon = name.indexOf(':');
if (colon != -1) {
// name:fqclassname
modname = name.substring(0, colon).trim();
classname = name.substring(colon+1, name.length()).trim();
if (classname.equals("null"))
// name:null, i.e. remove it
classname = null;
}
else {
modname = name.trim();
classname = "org.python.modules." + modname;
}
if (classname != null)
builtinNames.put(modname, classname);
else
builtinNames.remove(modname);
}
private static void initBuiltins(Properties props) {
builtinNames = Generic.map();
// add the oddball builtins that are specially handled
builtinNames.put("__builtin__", "");
builtinNames.put("sys", "");
// add builtins specified in the Setup.java file
for (String builtinModule : Setup.builtinModules)
addBuiltin(builtinModule);
// add builtins specified in the registry file
String builtinprop = props.getProperty("python.modules.builtin", "");
StringTokenizer tok = new StringTokenizer(builtinprop, ",");
while (tok.hasMoreTokens())
addBuiltin(tok.nextToken());
int n = builtinNames.size();
PyObject [] built_mod = new PyObject[n];
int i = 0;
for (String key : builtinNames.keySet()) {
built_mod[i++] = Py.newString(key);
}
builtin_module_names = new PyTuple(built_mod);
}
public static String getBuiltin(String name) {
return builtinNames.get(name);
}
private static PyList initPath(Properties props, boolean standalone, String jarFileName) {
PyList path = new PyList();
addPaths(path, props.getProperty("python.path", ""));
if (prefix != null) {
String libpath = new File(prefix.toString(), "Lib").toString();
path.append(new PyString(libpath));
}
if (standalone) {
// standalone jython: add the /Lib directory inside JYTHON_JAR to the path
addPaths(path, jarFileName + "/Lib");
}
return path;
}
/**
* Check if we are in standalone mode.
*
* @param jarFileName The name of the jar file
*
* @return true if we have a standalone .jar file, false otherwise.
*/
private static boolean isStandalone(String jarFileName) {
boolean standalone = false;
if (jarFileName != null) {
JarFile jarFile = null;
try {
jarFile = new JarFile(jarFileName);
JarEntry jarEntry = jarFile.getJarEntry("Lib/os.py");
standalone = jarEntry != null;
} catch (IOException ioe) {
} finally {
if (jarFile != null) {
try {
jarFile.close();
} catch (IOException e) {
}
}
}
}
return standalone;
}
/**
* @return the full name of the jar file containing this class, null if not available.
*/
private static String getJarFileName() {
String jarFileName = null;
Class thisClass = PySystemState.class;
String fullClassName = thisClass.getName();
String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
URL url = thisClass.getResource(className + ".class");
// we expect an URL like jar:file:/install_dir/jython.jar!/org/python/core/PySystemState.class
if (url != null) {
try {
String urlString = URLDecoder.decode(url.toString(),
Charset.defaultCharset().name());
int jarSeparatorIndex = urlString.lastIndexOf(JAR_SEPARATOR);
if (urlString.startsWith(JAR_URL_PREFIX) && jarSeparatorIndex > 0) {
jarFileName = urlString.substring(JAR_URL_PREFIX.length(), jarSeparatorIndex);
}
} catch (Exception e) {
}
}
return jarFileName;
}
private static void addPaths(PyList path, String pypath) {
StringTokenizer tok = new StringTokenizer(pypath,
java.io.File.pathSeparator);
while (tok.hasMoreTokens())
path.append(new PyString(tok.nextToken().trim()));
}
public static PyJavaPackage add_package(String n) {
return add_package(n, null);
}
public static PyJavaPackage add_package(String n, String contents) {
return packageManager.makeJavaPackage(n, contents, null);
}
/**
* Add a classpath directory to the list of places that are searched
* for java packages.
*
* Note. Classes found in directory and subdirectory are not
* made available to jython by this call. It only makes the java
* package found in the directory available. This call is mostly
* usefull if jython is embedded in an application that deals with
* its own classloaders. A servlet container is a very good example.
* Calling add_classdir("/WEB-INF/classes") makes the java
* packages in WEB-INF classes available to jython import. However the
* actual classloading is completely handled by the servlet container's
* context classloader.
*/
public static void add_classdir(String directoryPath) {
packageManager.addDirectory(new File(directoryPath));
}
/**
* Add a .jar & .zip directory to the list of places that are searched
* for java .jar and .zip files. The .jar and .zip files found will not
* be cached.
*
* Note. Classes in .jar and .zip files found in the directory
* are not made available to jython by this call. See the note for
* add_classdir(dir) for more details.
*
* @param directoryPath The name of a directory.
*
* @see #add_classdir
*/
public static void add_extdir(String directoryPath) {
packageManager.addJarDir(directoryPath, false);
}
/**
* Add a .jar & .zip directory to the list of places that are searched
* for java .jar and .zip files.
*
* Note. Classes in .jar and .zip files found in the directory
* are not made available to jython by this call. See the note for
* add_classdir(dir) for more details.
*
* @param directoryPath The name of a directory.
* @param cache Controls if the packages in the zip and jar
* file should be cached.
*
* @see #add_classdir
*/
public static void add_extdir(String directoryPath, boolean cache) {
packageManager.addJarDir(directoryPath, cache);
}
// Not public by design. We can't rebind the displayhook if
// a reflected function is inserted in the class dict.
static void displayhook(PyObject o) {
/* Print value except if None */
/* After printing, also assign to '_' */
/* Before, set '_' to None to avoid recursion */
if (o == Py.None)
return;
PyObject currentBuiltins = Py.getSystemState().getBuiltins();
currentBuiltins.__setitem__("_", Py.None);
Py.stdout.println(o.__repr__());
currentBuiltins.__setitem__("_", o);
}
static void excepthook(PyObject type, PyObject val, PyObject tb) {
Py.displayException(type, val, tb, null);
}
/**
* Exit a Python program with the given status.
*
* @param status the value to exit with
* @exception Py.SystemExit always throws this exception.
* When caught at top level the program will exit.
*/
public static void exit(PyObject status) {
throw new PyException(Py.SystemExit, status);
}
/**
* Exit a Python program with the status 0.
*/
public static void exit() {
exit(Py.None);
}
public static PyTuple exc_info() {
PyException exc = Py.getThreadState().exception;
if(exc == null)
return new PyTuple(Py.None, Py.None, Py.None);
PyObject tb = exc.traceback;
PyObject value = exc.value;
return new PyTuple(exc.type,
value == null ? Py.None : value,
tb == null ? Py.None : tb);
}
public static void exc_clear() {
Py.getThreadState().exception = null;
}
public static PyFrame _getframe() {
return _getframe(-1);
}
public static PyFrame _getframe(int depth) {
PyFrame f = Py.getFrame();
while (depth > 0 && f != null) {
f = f.f_back;
--depth;
}
if (f == null)
throw Py.ValueError("call stack is not deep enough");
return f;
}
}
class PySystemStateFunctions extends PyBuiltinFunctionSet
{
PySystemStateFunctions(String name, int index, int minargs, int maxargs) {
super(name, index, minargs, maxargs);
}
public PyObject __call__(PyObject arg) {
switch (index) {
case 10:
PySystemState.displayhook(arg);
return Py.None;
default:
throw info.unexpectedCall(1, false);
}
}
public PyObject __call__(PyObject arg1, PyObject arg2, PyObject arg3) {
switch (index) {
case 30:
PySystemState.excepthook(arg1, arg2, arg3);
return Py.None;
default:
throw info.unexpectedCall(3, false);
}
}
}
/**
* Value of a class or instance variable when the corresponding
* attribute is deleted. Used only in PySystemState for now.
*/
class PyAttributeDeleted extends PyObject {
final static PyAttributeDeleted INSTANCE = new PyAttributeDeleted();
private PyAttributeDeleted() {}
public String toString() { return ""; }
public Object __tojava__(Class c) {
if (c == PyObject.class)
return this;
// we can't quite "delete" non-PyObject attributes; settle for
// null or nothing
if (c.isPrimitive())
return Py.NoConversion;
return null;
}
}
class Shadow {
PyObject builtins;
PyList warnoptions;
PyObject platform;
Shadow() {
builtins = PySystemState.getDefaultBuiltins();
warnoptions = PySystemState.warnoptions;
platform = PySystemState.platform;
}
}