from __future__ import absolute_import from __future__ import unicode_literals from __future__ import division from collections import defaultdict from logging import getLogger, DEBUG from six import with_metaclass, PY2 from .jnius import ( JavaClass, MetaJavaClass, JavaMethod, JavaStaticMethod, JavaField, JavaStaticField, JavaMultipleMethod, find_javaclass, JavaException ) __all__ = ('autoclass', 'ensureclass', 'protocol_map') log = getLogger(__name__) class Class(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/Class' desiredAssertionStatus = JavaMethod('()Z') forName = JavaMultipleMethod([ ('(Ljava/lang/String,Z,Ljava/lang/ClassLoader;)Ljava/langClass;', True, False), ('(Ljava/lang/String;)Ljava/lang/Class;', True, False), ]) getClassLoader = JavaMethod('()Ljava/lang/ClassLoader;') getClasses = JavaMethod('()[Ljava/lang/Class;') getComponentType = JavaMethod('()Ljava/lang/Class;') getConstructor = JavaMethod('([Ljava/lang/Class;)Ljava/lang/reflect/Constructor;') getConstructors = JavaMethod('()[Ljava/lang/reflect/Constructor;') getDeclaredClasses = JavaMethod('()[Ljava/lang/Class;') getDeclaredConstructor = JavaMethod('([Ljava/lang/Class;)Ljava/lang/reflect/Constructor;') getDeclaredConstructors = JavaMethod('()[Ljava/lang/reflect/Constructor;') getDeclaredField = JavaMethod('(Ljava/lang/String;)Ljava/lang/reflect/Field;') getDeclaredFields = JavaMethod('()[Ljava/lang/reflect/Field;') getDeclaredMethod = JavaMethod('(Ljava/lang/String,[Ljava/lang/Class;)Ljava/lang/reflect/Method;') getDeclaredMethods = JavaMethod('()[Ljava/lang/reflect/Method;') getDeclaringClass = JavaMethod('()Ljava/lang/Class;') getField = JavaMethod('(Ljava/lang/String;)Ljava/lang/reflect/Field;') getFields = JavaMethod('()[Ljava/lang/reflect/Field;') getInterfaces = JavaMethod('()[Ljava/lang/Class;') getMethod = JavaMethod('(Ljava/lang/String,[Ljava/lang/Class;)Ljava/lang/reflect/Method;') getMethods = JavaMethod('()[Ljava/lang/reflect/Method;') getModifiers = JavaMethod('()[I') getName = JavaMethod('()Ljava/lang/String;') getPackage = JavaMethod('()Ljava/lang/Package;') getProtectionDomain = JavaMethod('()Ljava/security/ProtectionDomain;') getResource = JavaMethod('(Ljava/lang/String;)Ljava/net/URL;') getResourceAsStream = JavaMethod('(Ljava/lang/String;)Ljava/io/InputStream;') getSigners = JavaMethod('()[Ljava/lang/Object;') getSuperclass = JavaMethod('()Ljava/lang/Class;') isArray = JavaMethod('()Z') isAssignableFrom = JavaMethod('(Ljava/lang/Class;)Z') isInstance = JavaMethod('(Ljava/lang/Object;)Z') isInterface = JavaMethod('()Z') isPrimitive = JavaMethod('()Z') newInstance = JavaMethod('()Ljava/lang/Object;') toString = JavaMethod('()Ljava/lang/String;') def __str__(self): return ( '%s: [%s]' if self.isArray() else '%s: %s' ) % ( 'Interface' if self.isInterface() else 'Primitive' if self.isPrimitive() else 'Class', self.getName() ) def __repr__(self): return '<%s at 0x%x>' % (self, id(self)) class Object(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/Object' getClass = JavaMethod('()Ljava/lang/Class;') hashCode = JavaMethod('()I') class Modifier(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/reflect/Modifier' isAbstract = JavaStaticMethod('(I)Z') isFinal = JavaStaticMethod('(I)Z') isInterface = JavaStaticMethod('(I)Z') isNative = JavaStaticMethod('(I)Z') isPrivate = JavaStaticMethod('(I)Z') isProtected = JavaStaticMethod('(I)Z') isPublic = JavaStaticMethod('(I)Z') isStatic = JavaStaticMethod('(I)Z') isStrict = JavaStaticMethod('(I)Z') isSynchronized = JavaStaticMethod('(I)Z') isTransient = JavaStaticMethod('(I)Z') isVolatile = JavaStaticMethod('(I)Z') class Method(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/reflect/Method' getName = JavaMethod('()Ljava/lang/String;') toString = JavaMethod('()Ljava/lang/String;') getParameterTypes = JavaMethod('()[Ljava/lang/Class;') getReturnType = JavaMethod('()Ljava/lang/Class;') getModifiers = JavaMethod('()I') isVarArgs = JavaMethod('()Z') class Field(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/reflect/Field' getName = JavaMethod('()Ljava/lang/String;') toString = JavaMethod('()Ljava/lang/String;') getType = JavaMethod('()Ljava/lang/Class;') getModifiers = JavaMethod('()I') class Constructor(with_metaclass(MetaJavaClass, JavaClass)): __javaclass__ = 'java/lang/reflect/Constructor' toString = JavaMethod('()Ljava/lang/String;') getParameterTypes = JavaMethod('()[Ljava/lang/Class;') getModifiers = JavaMethod('()I') isVarArgs = JavaMethod('()Z') def get_signature(cls_tp): tp = cls_tp.getName() if tp[0] == '[': return tp.replace('.', '/') signatures = { 'void': 'V', 'boolean': 'Z', 'byte': 'B', 'char': 'C', 'short': 'S', 'int': 'I', 'long': 'J', 'float': 'F', 'double': 'D'} ret = signatures.get(tp) if ret: return ret # don't do it in recursive way for the moment, # error on the JNI/android: JNI ERROR (app bug): local reference table # overflow (max=512) # ensureclass(tp) return 'L{0};'.format(tp.replace('.', '/')) registers = [] def ensureclass(clsname): if clsname in registers: return jniname = clsname.replace('.', '/') if MetaJavaClass.get_javaclass(jniname): return registers.append(clsname) autoclass(clsname) def lower_name(s): return s[:1].lower() + s[1:] if s else '' def bean_getter(s): return (s.startswith('get') and len(s) > 3 and s[3].isupper()) or (s.startswith('is') and len(s) > 2 and s[2].isupper()) def log_method(method, name, signature): mods = method.getModifiers() log.debug( '\nmeth: %s\n' ' sig: %s\n' ' Public %s\n' ' Private %s\n' ' Protected %s\n' ' Static %s\n' ' Final %s\n' ' Synchronized %s\n' ' Volatile %s\n' ' Transient %s\n' ' Native %s\n' ' Interface %s\n' ' Abstract %s\n' ' Strict %s\n', name, signature, Modifier.isPublic(mods), Modifier.isPrivate(mods), Modifier.isProtected(mods), Modifier.isStatic(mods), Modifier.isFinal(mods), Modifier.isSynchronized(mods), Modifier.isVolatile(mods), Modifier.isTransient(mods), Modifier.isNative(mods), Modifier.isInterface(mods), Modifier.isAbstract(mods), Modifier.isStrict(mods) ) def identify_hierarchy(cls, level, concrete=True): supercls = cls.getSuperclass() if supercls is not None: for sup, lvl in identify_hierarchy(supercls, level + 1, concrete=concrete): yield sup, lvl # we could use yield from when we drop python2 interfaces = cls.getInterfaces() for interface in interfaces or []: for sup, lvl in identify_hierarchy(interface, level + 1, concrete=concrete): yield sup, lvl # all object extends Object, so if this top interface in a hierarchy, yield Object if not concrete and cls.isInterface() and not interfaces: yield find_javaclass('java.lang.Object'), level +1 yield cls, level def autoclass(clsname): jniname = clsname.replace('.', '/') cls = MetaJavaClass.get_javaclass(jniname) if cls: return cls classDict = {} # c = Class.forName(clsname) c = find_javaclass(clsname) if c is None: raise Exception('Java class {0} not found'.format(c)) return None constructors = [] for constructor in c.getConstructors(): sig = '({0})V'.format( ''.join([get_signature(x) for x in constructor.getParameterTypes()])) constructors.append((sig, constructor.isVarArgs())) classDict['__javaconstructor__'] = constructors class_hierachy = list(identify_hierarchy(c, 0, not c.isInterface())) log.debug("autoclass(%s) intf %r hierarchy is %s" % (clsname,c.isInterface(),str(class_hierachy))) cls_done=set() cls_methods=defaultdict(list) # we now walk the hierarchy, from top of the tree, identifying methods # hopefully we start at java.lang.Object for cls,level in class_hierachy: # dont analyse a given class more than once. # many interfaces can lead to java.lang.Object if cls in cls_done: continue cls_done.add(cls) # as we are walking the entire hierarchy, we only need getDeclaredMethods() # to get what is in this class; other parts of the hierarchy will be found # in those respective classes. methods = cls.getDeclaredMethods() methods_name = [x.getName() for x in methods] # collect all methods declared by this class of the hierarchy for later traversal for index, method in enumerate(methods): name = methods_name[index] cls_methods[name].append((cls, method, level)) # having collated the mthods, identify if there are any with the same name for name in cls_methods: if len(cls_methods[name]) == 1: # uniquely named method owningCls, method, level = cls_methods[name][0] static = Modifier.isStatic(method.getModifiers()) varargs = method.isVarArgs() sig = '({0}){1}'.format( ''.join([get_signature(x) for x in method.getParameterTypes()]), get_signature(method.getReturnType())) if log.isEnabledFor(DEBUG): log_method(method, name, sig) classDict[name] = (JavaStaticMethod if static else JavaMethod)(sig, varargs=varargs) if name != 'getClass' and bean_getter(name) and len(method.getParameterTypes()) == 0: lowername = lower_name(name[2 if name.startswith('is') else 3:]) classDict[lowername] = (lambda n: property(lambda self: getattr(self, n)()))(name) else: # multiple signatures signatures = [] log.debug("method %s has %d multiple signatures in hierarchy of cls %s" % (name, len(cls_methods[name]), c)) paramsig_to_level=defaultdict(lambda: float('inf')) # we now identify if any have the same signature, as we will call the _lowest_ in the hierarchy, # as reflected in min level for owningCls, method, level in cls_methods[name]: param_sig = ''.join([get_signature(x) for x in method.getParameterTypes()]) log.debug("\t owner %s level %d param_sig %s" % (str(owningCls), level, param_sig)) if level < paramsig_to_level[param_sig]: paramsig_to_level[param_sig] = level for owningCls, method, level in cls_methods[name]: param_sig = ''.join([get_signature(x) for x in method.getParameterTypes()]) # only accept the parameter signature at the deepest level of hierarchy (i.e. min level) if level > paramsig_to_level[param_sig]: log.debug("discarding %s name from %s at level %d" % (name, str(owningCls), level)) continue return_sig = get_signature(method.getReturnType()) sig = '({0}){1}'.format(param_sig, return_sig) if log.isEnabledFor(DEBUG): log_method(method, name, sig) signatures.append((sig, Modifier.isStatic(method.getModifiers()), method.isVarArgs())) log.debug("method selected %d multiple signatures of %s" % (len(signatures), str(signatures))) classDict[name] = JavaMultipleMethod(signatures) # check whether any classes in the hierarchy appear in the protocol_map for cls, _ in class_hierachy: cls_name = cls.getName() if cls_name in protocol_map: for pname, plambda in protocol_map[cls_name].items(): classDict[pname] = plambda for field in c.getFields(): static = Modifier.isStatic(field.getModifiers()) sig = get_signature(field.getType()) cls = JavaStaticField if static else JavaField classDict[field.getName()] = cls(sig) classDict['__javaclass__'] = clsname.replace('.', '/') return MetaJavaClass.__new__( MetaJavaClass, clsname, (JavaClass, ), classDict ) def _getitem(self, index): ''' dunder method for List ''' try: return self.get(index) except JavaException as e: # initialize the subclass before getting the Class.forName # otherwise isInstance does not know of the subclass mock_exception_object = autoclass(e.classname)() if find_javaclass("java.lang.IndexOutOfBoundsException").isInstance(mock_exception_object): # python for...in iteration checks for end of list by waiting for IndexError raise IndexError() else: raise def _map_getitem(self, k): ''' dunder method for java.util.Map ''' rtr = self.get(k) if rtr is None: raise KeyError() return rtr class Py2Iterator(object): ''' In py2 the next() is called on the iterator, not __next__ so we need to wrap the java call to check hasNext to conform to python's api ''' def __init__(self, java_iterator): self.java_iterator = java_iterator def __iter__(self): return self def next(self): log.debug("monkey patched next() called") if not self.java_iterator.hasNext(): raise StopIteration() return self.java_iterator.next() def safe_iterator(iterator): if PY2: return Py2Iterator(iterator) return iterator def _iterator_next(self): ''' dunder method for java.util.Iterator''' if not self.hasNext(): raise StopIteration() return self.next() # protocol_map is a user-accessible API for patching class instances with additional methods protocol_map = { 'java.util.Collection' : { '__len__' : lambda self: self.size(), '__contains__' : lambda self, item: self.contains(item), '__delitem__' : lambda self, item: self.remove(item) }, 'java.util.List' : { '__getitem__' : _getitem }, 'java.util.Map' : { '__setitem__' : lambda self, k, v : self.put(k,v), '__getitem__' : _map_getitem, '__delitem__' : lambda self, item: self.remove(item), '__len__' : lambda self: self.size(), '__contains__' : lambda self, item: self.containsKey(item), '__iter__' : lambda self: safe_iterator(self.keySet().iterator()) }, 'java.util.Iterator' : { '__iter__' : lambda self: safe_iterator(self), '__next__' : _iterator_next, }, 'java.lang.Iterable' : { '__iter__' : lambda self: safe_iterator(self.iterator()), }, # this also addresses java.io.Closeable 'java.lang.AutoCloseable' : { '__enter__' : lambda self: self, '__exit__' : lambda self, type, value, traceback: self.close() }, 'java.lang.Comparable' : { #__cmp__ is for Python 2 support '__cmp__' : lambda self, other: self.compareTo(other), '__eq__' : lambda self, other: self.equals(other), '__ne__' : lambda self, other: not self.equals(other), '__lt__' : lambda self, other: self.compareTo(other) < 0, '__gt__' : lambda self, other: self.compareTo(other) > 0, '__le__' : lambda self, other: self.compareTo(other) <= 0, '__ge__' : lambda self, other: self.compareTo(other) >= 0, } }