pyjnius/tests/test_proxy.py

from jnius import autoclass, java_implementation, PythonJavaClass, cast

print '1: declare a TestImplem that implement Collection'


class TestImplemIterator(PythonJavaClass):
    __javainterfaces__ = [
        #'java/util/Iterator',
        'java/util/ListIterator', ]

    def __init__(self, collection, index=0):
        super(TestImplemIterator, self).__init__()
        self.collection = collection
        self.index = index

    @java_implementation('()Z')
    def hasNext(self):
        return self.index < len(self.collection.data)

    @java_implementation('()Ljava/lang/Object;')
    def next(self):
        obj = self.collection.data[self.index]
        self.index += 1
        return obj

    @java_implementation('()Z')
    def hasPrevious(self):
        return self.index >= 0

    @java_implementation('()Ljava/lang/Object;')
    def previous(self):
        self.index -= 1
        obj = self.collection.data[self.index]
        print "previous called", obj
        return obj

    @java_implementation('()I')
    def previousIndex(self):
        return self.index - 1

    @java_implementation('()Ljava/lang/String;')
    def toString(self):
        return repr(self)

    @java_implementation('(I)Ljava/lang/Object;')
    def get(self, index):
        return self.collection.data[index]

    @java_implementation('(Ljava/lang/Object;)V')
    def set(self, index, obj):
        self.data[index] = obj


class TestImplem(PythonJavaClass):
    __javainterfaces__ = ['java/util/List']

    def __init__(self, *args):
        super(TestImplem, self).__init__(*args)
        self.data = list(args)

    @java_implementation('()Ljava/util/Iterator;')
    def iterator(self):
        it = TestImplemIterator(self)
        return it

    @java_implementation('()Ljava/lang/String;')
    def toString(self):
        return repr(self)

    @java_implementation('()I')
    def size(self):
        return len(self.data)

    @java_implementation('(I)Ljava/lang/Object;')
    def get(self, index):
        return self.data[index]

    @java_implementation('(ILjava/lang/Object;)Ljava/lang/Object;')
    def set(self, index, obj):
        old_object = self.data[index]
        self.data[index] = obj
        return old_object

    @java_implementation('()[Ljava/lang/Object;')
    def toArray(self):
        return self.data

    @java_implementation('()Ljava/util/ListIterator;')
    def listIterator(self):
        it = TestImplemIterator(self)
        return it

    @java_implementation('(I)Ljava/util/ListIterator;',
                         name='ListIterator')
    def listIteratorI(self, index):
        it = TestImplemIterator(self, index)
        return it


print '2: instanciate the class, with some data'
a = TestImplem(*range(10))
print a
print dir(a)

print '3: Do cast to a collection'
a2 = cast('java/util/Collection', a.j_self)
print a2

print '4: Try few method on the collection'
Collections = autoclass('java.util.Collections')
#print Collections.enumeration(a)
#print Collections.enumeration(a)
ret = Collections.max(a)

print "reverse"
print Collections.reverse(a)
print a.data

print "before swap"
print Collections.swap(a, 2, 3)
print "after swap"
print a.data

print "rotate"
print Collections.rotate(a, 5)
print a.data

# if this test is commented, the next one fail…
print 'tries to get a ListIterator'
print a.listIterator()

print 'Order of data before shuffle()', a.data
print Collections.shuffle(a)
print 'Order of data after shuffle()', a.data


# XXX We have issues for methosd with multiple signature
#print '-> Collections.max(a)'
#print Collections.max(a2)
#print '-> Collections.max(a)'
#print Collections.max(a2)
#print '-> Collections.shuffle(a)'
#print Collections.shuffle(a2)