mirror of https://github.com/kivy/pyjnius.git
356 lines
12 KiB
Cython
356 lines
12 KiB
Cython
cdef parse_definition(definition):
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# not a function, just a field
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if definition[0] != '(':
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return definition, None
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# it's a function!
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argdef, ret = definition[1:].split(')')
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args = []
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while len(argdef):
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c = argdef[0]
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# read the array char(s)
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prefix = ''
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while c == '[':
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prefix += c
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argdef = argdef[1:]
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c = argdef[0]
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# native type
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if c in 'ZBCSIJFD':
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args.append(prefix + c)
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argdef = argdef[1:]
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continue
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# java class
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if c == 'L':
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c, argdef = argdef.split(';', 1)
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args.append(prefix + c + ';')
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continue
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raise Exception('Invalid "{}" character in definition "{}"'.format(
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c, definition[1:]))
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return ret, tuple(args)
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cdef void check_exception(JNIEnv *j_env) except *:
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cdef jmethodID toString = NULL
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cdef jmethodID getCause = NULL
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cdef jmethodID getStackTrace = NULL
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cdef jmethodID getMessage = NULL
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cdef jstring e_msg
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cdef jboolean isCopy
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cdef jthrowable exc = j_env[0].ExceptionOccurred(j_env)
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cdef jclass cls_object = NULL
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cdef jclass cls_throwable = NULL
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if exc:
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# ExceptionDescribe always writes to stderr, preventing tidy exception
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# handling, so should only be for debugging
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# j_env[0].ExceptionDescribe(j_env)
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j_env[0].ExceptionClear(j_env)
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cls_object = j_env[0].FindClass(j_env, "java/lang/Object")
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cls_throwable = j_env[0].FindClass(j_env, "java/lang/Throwable")
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toString = j_env[0].GetMethodID(j_env, cls_object, "toString", "()Ljava/lang/String;");
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getMessage = j_env[0].GetMethodID(j_env, cls_throwable, "getMessage", "()Ljava/lang/String;");
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getCause = j_env[0].GetMethodID(j_env, cls_throwable, "getCause", "()Ljava/lang/Throwable;");
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getStackTrace = j_env[0].GetMethodID(j_env, cls_throwable, "getStackTrace", "()[Ljava/lang/StackTraceElement;");
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e_msg = j_env[0].CallObjectMethod(j_env, exc, getMessage);
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pymsg = None if e_msg == NULL else convert_jobject_to_python(j_env, <bytes> 'Ljava/lang/String;', e_msg)
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pystack = []
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_append_exception_trace_messages(j_env, pystack, exc, getCause, getStackTrace, toString)
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pyexcclass = lookup_java_object_name(j_env, exc).replace('/', '.')
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j_env[0].DeleteLocalRef(j_env, cls_object)
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j_env[0].DeleteLocalRef(j_env, cls_throwable)
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if e_msg != NULL:
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j_env[0].DeleteLocalRef(j_env, e_msg)
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j_env[0].DeleteLocalRef(j_env, exc)
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raise JavaException('JVM exception occurred: %s' % (pymsg if pymsg is not None else pyexcclass), pyexcclass, pymsg, pystack)
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cdef void _append_exception_trace_messages(
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JNIEnv* j_env,
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list pystack,
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jthrowable exc,
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jmethodID mid_getCause,
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jmethodID mid_getStackTrace,
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jmethodID mid_toString):
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# Get the array of StackTraceElements.
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cdef jobjectArray frames = j_env[0].CallObjectMethod(j_env, exc, mid_getStackTrace)
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cdef jsize frames_length = j_env[0].GetArrayLength(j_env, frames)
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cdef jstring msg_obj
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cdef jobject frame
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cdef jthrowable cause
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# Add Throwable.toString() before descending stack trace messages.
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if frames != NULL:
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msg_obj = j_env[0].CallObjectMethod(j_env, exc, mid_toString)
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pystr = None if msg_obj == NULL else convert_jobject_to_python(j_env, <bytes> 'Ljava/lang/String;', msg_obj)
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# If this is not the top-of-the-trace then this is a cause.
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if len(pystack) > 0:
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pystack.append("Caused by:")
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pystack.append(pystr)
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if msg_obj != NULL:
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j_env[0].DeleteLocalRef(j_env, msg_obj)
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# Append stack trace messages if there are any.
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if frames_length > 0:
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for i in range(frames_length):
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# Get the string returned from the 'toString()' method of the next frame and append it to the error message.
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frame = j_env[0].GetObjectArrayElement(j_env, frames, i)
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msg_obj = j_env[0].CallObjectMethod(j_env, frame, mid_toString)
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pystr = None if msg_obj == NULL else convert_jobject_to_python(j_env, <bytes> 'Ljava/lang/String;', msg_obj)
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pystack.append(pystr)
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if msg_obj != NULL:
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j_env[0].DeleteLocalRef(j_env, msg_obj)
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j_env[0].DeleteLocalRef(j_env, frame)
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# If 'exc' has a cause then append the stack trace messages from the cause.
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if frames != NULL:
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cause = j_env[0].CallObjectMethod(j_env, exc, mid_getCause)
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if cause != NULL:
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_append_exception_trace_messages(j_env, pystack, cause,
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mid_getCause, mid_getStackTrace, mid_toString)
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j_env[0].DeleteLocalRef(j_env, cause)
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j_env[0].DeleteLocalRef(j_env, frames)
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cdef dict assignable_from = {}
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cdef int assignable_from_order = 0
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cdef void check_assignable_from(JNIEnv *env, JavaClass jc, bytes signature) except *:
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global assignable_from_order
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cdef jclass cls, clsA, clsB
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cdef jthrowable exc
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# first call, we need to get over the libart issue, which implemented
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# IsAssignableFrom the wrong way.
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# Ref: https://github.com/kivy/pyjnius/issues/92
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# Google Bug: https://android.googlesource.com/platform/art/+/1268b74%5E!/
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if assignable_from_order == 0:
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clsA = env[0].FindClass(env, "java/lang/String")
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clsB = env[0].FindClass(env, "java/lang/Object")
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if env[0].IsAssignableFrom(env, clsB, clsA):
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# Bug triggered, IsAssignableFrom said we can do things like:
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# String a = Object()
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assignable_from_order = -1
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else:
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assignable_from_order = 1
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# if we have a JavaObject, it's always ok.
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if signature == 'java/lang/Object':
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return
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# FIXME Android/libART specific check
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# check_jni.cc crash when calling the IsAssignableFrom with
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# org/jnius/NativeInvocationHandler java/lang/reflect/InvocationHandler
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# Because we know it's ok, just return here.
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if signature == 'java/lang/reflect/InvocationHandler' and \
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jc.__javaclass__ == 'org/jnius/NativeInvocationHandler':
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return
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# if the signature is a direct match, it's ok too :)
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if jc.__javaclass__ == signature:
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return
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# if we already did the test before, use the cache result!
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result = assignable_from.get((jc.__javaclass__, signature), None)
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if result is None:
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# we got an object that doesn't match with the signature
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# check if we can use it.
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cls = env[0].FindClass(env, signature)
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if cls == NULL:
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raise JavaException('Unable to found the class for {0!r}'.format(
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signature))
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if assignable_from_order == 1:
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result = bool(env[0].IsAssignableFrom(env, jc.j_cls, cls))
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else:
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result = bool(env[0].IsAssignableFrom(env, cls, jc.j_cls))
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exc = env[0].ExceptionOccurred(env)
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if exc:
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env[0].ExceptionDescribe(env)
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env[0].ExceptionClear(env)
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assignable_from[(jc.__javaclass__, signature)] = bool(result)
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if result is False:
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raise JavaException('Invalid instance of {0!r} passed for a {1!r}'.format(
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jc.__javaclass__, signature))
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cdef bytes lookup_java_object_name(JNIEnv *j_env, jobject j_obj):
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cdef jclass jcls = j_env[0].GetObjectClass(j_env, j_obj)
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cdef jclass jcls2 = j_env[0].GetObjectClass(j_env, jcls)
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cdef jmethodID jmeth = j_env[0].GetMethodID(j_env, jcls2, 'getName', '()Ljava/lang/String;')
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cdef jobject js = j_env[0].CallObjectMethod(j_env, jcls, jmeth)
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name = convert_jobject_to_python(j_env, b'Ljava/lang/String;', js)
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j_env[0].DeleteLocalRef(j_env, js)
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j_env[0].DeleteLocalRef(j_env, jcls)
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j_env[0].DeleteLocalRef(j_env, jcls2)
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return name.replace('.', '/')
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cdef int calculate_score(sign_args, args, is_varargs=False) except *:
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cdef int index
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cdef int score = 0
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cdef bytes r
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cdef JavaClass jc
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if len(args) != len(sign_args) and not is_varargs:
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# if the number of arguments expected is not the same
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# as the number of arguments the method gets
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# it can not be the method we are looking for except
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# if the method has varargs aka. it takes
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# an undefined number of arguments
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return -1
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elif len(args) == len(sign_args) and not is_varargs:
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# if the method has the good number of arguments and
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# the method doesn't take varargs increment the score
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# so that it takes precedence over a method with the same
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# signature and varargs e.g.
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# (Integer, Integer) takes precedence over (Integer, Integer, Integer...)
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# and
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# (Integer, Integer, Integer) takes precedence over (Integer, Integer, Integer...)
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score += 10
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for index in range(len(sign_args)):
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r = sign_args[index]
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arg = args[index]
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if r == 'Z':
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if not isinstance(arg, bool):
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return -1
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score += 10
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continue
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if r == 'B':
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if not isinstance(arg, int):
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return -1
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score += 10
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continue
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if r == 'C':
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if not isinstance(arg, str) or len(arg) != 1:
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return -1
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score += 10
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continue
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if r == 'S' or r == 'I' or r == 'J':
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if isinstance(arg, int):
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score += 10
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continue
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elif isinstance(arg, float):
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score += 5
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continue
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else:
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return -1
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if r == 'F' or r == 'D':
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if isinstance(arg, int):
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score += 5
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continue
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elif isinstance(arg, float):
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score += 10
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continue
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else:
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return -1
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if r[0] == 'L':
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r = r[1:-1]
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if arg is None:
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score += 10
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continue
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# if it's a string, accept any python string
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if r == 'java/lang/String' and isinstance(arg, basestring):
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score += 10
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continue
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# if it's a generic object, accept python string, or any java
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# class/object
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if r == 'java/lang/Object':
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if isinstance(arg, JavaClass) or isinstance(arg, JavaObject):
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score += 10
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continue
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elif isinstance(arg, basestring):
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score += 5
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continue
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return -1
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# accept an autoclass class for java/lang/Class.
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if hasattr(arg, '__javaclass__') and r == 'java/lang/Class':
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score += 10
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continue
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# if we pass a JavaClass, ensure the definition is matching
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# XXX FIXME what if we use a subclass or something ?
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if isinstance(arg, JavaClass):
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jc = arg
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if jc.__javaclass__ == r:
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score += 10
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else:
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#try:
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# check_assignable_from(jc, r)
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#except:
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# return -1
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score += 5
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continue
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# always accept unknow object, but can be dangerous too.
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if isinstance(arg, JavaObject):
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score += 1
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continue
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if isinstance(arg, PythonJavaClass):
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score += 1
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continue
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# native type? not accepted
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return -1
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if r[0] == '[':
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if arg is None:
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score += 10
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continue
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if (r == '[B' or r == '[C') and isinstance(arg, basestring):
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score += 10
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continue
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if r == '[B' and isinstance(arg, ByteArray):
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score += 10
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continue
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if not isinstance(arg, (list, tuple)):
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return -1
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# calculate the score for our subarray
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if len(arg) > 0:
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# if there are supplemantal arguments we compute the score
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subscore = calculate_score([r[1:]] * len(arg), arg)
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if subscore == -1:
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return -1
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# the supplemental arguments match the varargs arguments
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score += 10
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continue
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# else if there is no supplemental arguments
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# it might be the good method but there may be
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# a method with a better signature so we don't
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# change this method score
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return score
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