handle non ascii classpath with system classloader

jpype/_core.py

@@ -32,8 +32,6 @@
 
 from ._jvmfinder import *
 
-from jpype._classpath import addClassPath
-
 # This import is required to bootstrap importlib, _jpype uses importlib.util
 # but on some systems it may not load properly from C.  To make sure it gets
 # loaded properly we are going to force the issue even through we don't
@@ -111,28 +109,35 @@
     return _jpype.isStarted()
 
 
-def _hasClassPath(args) -> bool:
+def _getOldClassPath(args) -> list[str]:
     for i in args:
-        if isinstance(i, str) and i.startswith('-Djava.class.path'):
+        if not isinstance(i, str):
+            continue
+        _, _, classpath = i.partition('-Djava.class.path=')
+        if classpath:
+            return classpath.split(_classpath._SEP)
+    return []
+
+
+def _hasSystemClassLoader(args) -> bool:
+    for i in args:
+        if isinstance(i, str) and i.startswith('-Djava.system.class.loader'):
             return True
     return False
 
 
 def _handleClassPath(
-    classpath: typing.Union[typing.Sequence[_PathOrStr], _PathOrStr, None] = None,
-    ascii: bool = True
+    classpath: typing.Union[typing.Sequence[_PathOrStr], _PathOrStr, None] = None
 ) -> typing.Sequence[str]:
     """
     Return a classpath which represents the given tuple of classpath specifications
     """
     out: list[str] = []
-    if classpath is None:
-        return out
     if isinstance(classpath, (str, os.PathLike)):
         classpath = (classpath,)
     try:
         # Convert anything iterable into a tuple.
-        classpath = tuple(classpath)
+        classpath = tuple(classpath) # type: ignore[arg-type]
     except TypeError:
         raise TypeError("Unknown class path element")
 
@@ -152,9 +157,11 @@
             out.extend(glob.glob(pth + '.jar'))
         else:
             out.append(pth)
-    if ascii:
-        return [i for i in out if i.isascii()]
-    return [i for i in out if not i.isascii()]
+    return out
+
+
+def _removeClassPath(args) -> tuple[str]:
+    return tuple(arg for arg in args if not str(arg).startswith("-Djava.class.path"))
 
 
 _JVM_started = False
@@ -215,6 +222,9 @@
     if _JVM_started:
         raise OSError('JVM cannot be restarted')
 
+    has_classloader = _hasSystemClassLoader(jvmargs)
+
+
     # JVM path
     if jvmargs:
         # jvm is the first argument the first argument is a path or None
@@ -231,24 +241,51 @@
         jvmpath = os.fspath(jvmpath)
 
     # Classpath handling
-    if _hasClassPath(jvmargs):
+    old_classpath = _getOldClassPath(jvmargs)
+    if old_classpath:
         # Old style, specified in the arguments
         if classpath is not None:
             # Cannot apply both styles, conflict
             raise TypeError('classpath specified twice')
+        classpath = old_classpath
     elif classpath is None:
         # Not specified at all, use the default classpath.
         classpath = _classpath.getClassPath()
 
     # Handle strings and list of strings.
-    extra_jvm_args = []
-    if classpath:
-        cp = _classpath._SEP.join(_handleClassPath(classpath))
-        extra_jvm_args += ['-Djava.class.path=%s'%cp ]
+    extra_jvm_args: list[str] = []
 
     supportLib = os.path.join(os.path.dirname(os.path.dirname(__file__)), "org.jpype.jar")
     if not os.path.exists(supportLib):
         raise RuntimeError("Unable to find org.jpype.jar support library at " + supportLib)
+
+    late_load = not has_classloader
+    if classpath:
+        cp = _classpath._SEP.join(_handleClassPath(classpath))
+        if cp.isascii():
+            # no problems
+            extra_jvm_args += ['-Djava.class.path=%s'%cp ]
+            jvmargs = _removeClassPath(jvmargs)
+            late_load = False
+        elif has_classloader:
+            # https://bugs.openjdk.org/browse/JDK-8079633?jql=text%20~%20%22ParseUtil%22
+            raise ValueError("system classloader cannot be specified with non ascii characters in the classpath")
+        elif supportLib.isascii():
+            # ok, setup the jpype system classloader and add to the path after startup
+            # this guarentees all classes have the same permissions as they did in the past
+            extra_jvm_args += [
+                '-Djava.system.class.loader=org.jpype.classloader.JpypeSystemClassLoader',
+                '-Djava.class.path=%s'%supportLib
+            ]
+            jvmargs = _removeClassPath(jvmargs)
+        else:
+            # We are screwed no matter what we try or do.
+            # Unfortunately the jdk maintainers don't seem to care either.
+            # This bug is almost 10 years old and spans 16 jdk versions and counting.
+            # https://bugs.openjdk.org/browse/JDK-8079633?jql=text%20~%20%22ParseUtil%22
+            raise ValueError("jpype jar must be ascii to add to the system class path")
+
+
     extra_jvm_args += ['-javaagent:' + supportLib]
 
     try:
@@ -278,20 +315,22 @@
                 raise RuntimeError(f"{jvmpath} is older than required Java version{version}") from ex
         raise
 
-    """Prior versions of JPype used the jvmargs to setup the class paths via 
+    """Prior versions of JPype used the jvmargs to setup the class paths via
     JNI (Java Native Interface) option strings:
-    i.e -Djava.class.path=... 
+    i.e -Djava.class.path=...
     See: https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/invocation.html
-
-    Unfortunately, unicode is unsupported by this interface on windows, since
-    windows uses wide-byte (16bit) character encoding.
-    See: https://stackoverflow.com/questions/20052455/jni-start-jvm-with-unicode-support
 
-    To resolve this issue we add the classpath after initialization since jpype
-    itself supports unicode class paths.
+    Unfortunately, only ascii paths work because url encoding is not handled correctly
+    see: https://bugs.openjdk.org/browse/JDK-8079633?jql=text%20~%20%22ParseUtil%22
+
+    To resolve this issue, we add the classpath after initialization since Java has
+    had the utilities to correctly encode it since 1.0
     """
-    for cp in _handleClassPath(classpath, False):
-        addClassPath(Path.cwd() / Path(cp).resolve())
+    if late_load and classpath:
+        # now we can add to the system classpath
+        cl = _jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        for cp in _handleClassPath(classpath):
+            cl.addPath(_jpype._java_lang_String(cp))
 
 
 def initializeResources():

native/java/org/jpype/classloader/JpypeSystemClassLoader.java

@@ -0,0 +1,43 @@
+/* ****************************************************************************
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+  See NOTICE file for details.
+**************************************************************************** */
+package org.jpype.classloader;
+
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Paths;
+
+public final class JpypeSystemClassLoader extends URLClassLoader {
+
+	public JpypeSystemClassLoader(ClassLoader parent) throws Throwable {
+		super(new URL[0], parent);
+	}
+
+	public void addPath(String path) throws Throwable {
+		addURL(Paths.get(path).toAbsolutePath().toUri().toURL());
+	}
+
+	public void addPaths(String[] paths) throws Throwable {
+		for (String path : paths) {
+			addPath(path);
+		}
+	}
+
+	// this is required to add a Java agent even if it is already in the path
+	@SuppressWarnings("unused")
+	private void appendToClassPathForInstrumentation(String path) throws Throwable {
+		addPath(path);
+	}
+}

test/harness/jpype/startup/TestSystemClassLoader.java

@@ -0,0 +1,42 @@
+/* ****************************************************************************
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+  See NOTICE file for details.
+**************************************************************************** */
+package jpype.startup;
+
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Paths;
+
+public class TestSystemClassLoader extends URLClassLoader {
+
+	public TestSystemClassLoader(ClassLoader parent) throws Throwable {
+		super(new URL[0], parent);
+	}
+
+	public void addPath(String path) throws Throwable {
+		addURL(Paths.get(path).toAbsolutePath().toUri().toURL());
+	}
+
+	public void addPaths(String[] paths) throws Throwable {
+		for (String path : paths) {
+			addPath(path);
+		}
+	}
+
+	@SuppressWarnings("unused") // needed to start with agent
+	private void appendToClassPathForInstrumentation(String path) throws Throwable {
+		addPath(path);
+	}
+}

test/jpypetest/test_startup.py

@@ -151,4 +151,61 @@ def testNonASCIIPath(self):
         Regression test for https://github.com/jpype-project/jpype/issues/1194
         """
         jpype.startJVM(jvmpath=Path(self.jvmpath), classpath="test/jar/unicode_à😎/sample_package.jar")
+        cl = jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        self.assertEqual(type(cl), jpype.JClass("org.jpype.classloader.JpypeSystemClassLoader"))
         assert dir(jpype.JPackage('org.jpype.sample_package')) == ['A', 'B']
+
+
+    def testOldStyleNonASCIIPath(self):
+        """Test that paths with non-ASCII characters are handled correctly.
+        Regression test for https://github.com/jpype-project/jpype/issues/1194
+        """
+        jpype.startJVM("-Djava.class.path=test/jar/unicode_à😎/sample_package.jar", jvmpath=Path(self.jvmpath))
+        cl = jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        self.assertEqual(type(cl), jpype.JClass("org.jpype.classloader.JpypeSystemClassLoader"))
+        assert dir(jpype.JPackage('org.jpype.sample_package')) == ['A', 'B']
+
+    def testNonASCIIPathWithSystemClassLoader(self):
+        with self.assertRaises(ValueError):
+            jpype.startJVM(
+                "-Djava.system.class.loader=jpype.startup.TestSystemClassLoader",
+                jvmpath=Path(self.jvmpath),
+                classpath="test/jar/unicode_à😎/sample_package.jar"
+            )
+
+    def testOldStyleNonASCIIPathWithSystemClassLoader(self):
+        with self.assertRaises(ValueError):
+            jpype.startJVM(
+                self.jvmpath,
+                "-Djava.system.class.loader=jpype.startup.TestSystemClassLoader",
+                "-Djava.class.path=test/jar/unicode_à😎/sample_package.jar"
+            )
+
+    def testASCIIPathWithSystemClassLoader(self):
+        jpype.startJVM(
+            "-Djava.system.class.loader=jpype.startup.TestSystemClassLoader",
+            jvmpath=Path(self.jvmpath),
+            classpath=f"test/classes"
+        )
+        classloader = jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        test_classLoader = jpype.JClass("jpype.startup.TestSystemClassLoader")
+        self.assertEqual(type(classloader), test_classLoader)
+        assert dir(jpype.JPackage('jpype.startup')) == ['TestSystemClassLoader']
+
+    def testOldStyleASCIIPathWithSystemClassLoader(self):
+        jpype.startJVM(
+            self.jvmpath,
+            "-Djava.system.class.loader=jpype.startup.TestSystemClassLoader",
+            "-Djava.class.path=test/classes"
+        )
+        classloader = jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        test_classLoader = jpype.JClass("jpype.startup.TestSystemClassLoader")
+        self.assertEqual(type(classloader), test_classLoader)
+        assert dir(jpype.JPackage('jpype.startup')) == ['TestSystemClassLoader']
+
+    def testDefaultSystemClassLoader(self):
+        # we introduce no behavior change unless absolutely necessary
+        jpype.startJVM(jvmpath=Path(self.jvmpath))
+        cl = jpype.JClass("java.lang.ClassLoader").getSystemClassLoader()
+        self.assertNotEqual(type(cl), jpype.JClass("org.jpype.classloader.JpypeSystemClassLoader"))
+

test/jpypetest/test_thread.py

@@ -16,11 +16,11 @@
 #
 # *****************************************************************************
 import jpype
-import sys
-import time
 import common
 import pytest
 
+from jpype.imports import *
+
 
 class ThreadTestCase(common.JPypeTestCase):
     def setUp(self):