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#*****************************************************************************
# Copyright 2004-2008 Steve Menard
#
# 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.
#
#*****************************************************************************
import collections
import sys
import _jpype
from . import _jclass
from . import _jwrapper
if sys.version > '3':
unicode = str
irange = range
_CLASSES = {}
_CUSTOMIZERS = []
def _initialize():
_jpype.setResource('JavaArrayClass',_JavaArrayClass)
_jpype.setResource('GetJavaArrayClassMethod',_getClassFor)
registerArrayCustomizer(CharArrayCustomizer())
registerArrayCustomizer(ByteArrayCustomizer())
def registerArrayCustomizer(c):
_CUSTOMIZERS.append(c)
class _JavaArrayClass(object):
def __init__(self, jo):
self.__javaobject__ = jo
def __str__(self):
return str(tuple(self))
def __len__(self):
return _jpype.getArrayLength(self.__javaobject__)
def __iter__(self):
return _JavaArrayIter(self)
def __getitem__(self, ndx):
if isinstance(ndx, slice):
start, stop, step = ndx.indices(len(self))
if step != 1:
raise RuntimeError("Slicing with step unimplemented")
return self.__getslice__(start, stop)
return _jpype.getArrayItem(self.__javaobject__, ndx)
def __setitem__(self, ndx, val):
if isinstance(ndx, slice):
start, stop, step = ndx.indices(len(self))
if step != 1:
# Iterate in python if we need to step
indices = irange(start, stop, step)
for index, value in zip(indices, val):
self[index] = value
else:
self.__setslice__(start, stop, val)
return
_jpype.setArrayItem(self.__javaobject__, ndx, val)
def __getslice__(self, i, j):
if j == sys.maxsize:
j = _jpype.getArrayLength(self.__javaobject__)
return _jpype.getArraySlice(self.__javaobject__, i, j)
def __setslice__(self, i, j, v):
if j == sys.maxsize:
j = _jpype.getArrayLength(self.__javaobject__)
_jpype.setArraySlice(self.__javaobject__, i, j, v)
def __setattr__(self, attr, value):
if attr.startswith('_') \
or callable(value) \
or isinstance(getattr(self.__class__, attr), property):
object.__setattr__(self, attr, value)
else:
raise AttributeError("%s does not have field %s"%(self.__name__, attr), self)
def _jarrayInit(self, *args):
if len(args) == 2 and args[0] == _jclass._SPECIAL_CONSTRUCTOR_KEY:
_JavaArrayClass.__init__(self, args[1])
elif len(args) != 1:
raise TypeError(
"Array classes only take 2 parameters, {0} given"
.format(len(args) + 1))
else:
values = None
if isinstance(args[0], collections.Sequence):
sz = len(args[0])
values = args[0]
else:
sz = args[0]
_JavaArrayClass.__init__(
self, _jpype.newArray(self.__class__.__javaclass__, sz))
if values is not None:
_jpype.setArraySlice(self.__javaobject__, 0, sz, values)
class _JavaArrayIter(object):
def __init__(self, a):
self._array = a
self._ndx = -1
def __iter__(self):
return self
def __next__(self):
self._ndx += 1
if self._ndx >= len(self._array):
raise StopIteration
return self._array[self._ndx]
next = __next__
class _JavaArray(type):
pass
def _defineArrayClass(name, jt):
members = {
"__init__": _jarrayInit,
"__javaclass__": jt,
"__name__": name,
}
bases = [_JavaArrayClass]
for i in _CUSTOMIZERS:
if i.canCustomize(name, jt):
i.customize(name, jt, bases, members)
return _JavaArray(name, tuple(bases), members)
def _getClassFor(name):
if name not in _CLASSES:
jc = _jpype.findArrayClass(name)
_CLASSES[name] = _defineArrayClass(name, jc)
return _CLASSES[name]
def JArray(t, ndims=1):
if issubclass(t, _jwrapper._JWrapper):
t = t.typeName
elif isinstance(t, _JavaArray):
t = t.typeName
elif issubclass(t, _jclass._JAVAOBJECT):
t = t.__name__
elif not isinstance(t, str) and not isinstance(t, unicode):
raise TypeError("Argument must be a java class, java array class, "
"java wrapper or string representing a java class")
arrayTypeName = t + ('[]' * ndims)
return _getClassFor(arrayTypeName)
def _charArrayStr(self):
return ''.join(self)
def _charArrayUnicode(self):
return u''.join(self)
class CharArrayCustomizer(object):
def canCustomize(self, name, jc):
if name == 'char[]':
return True
return False
def customize(self, name, jc, bases, members):
members['__str__'] = _charArrayStr
members['__unicode__'] = _charArrayUnicode
def _byteArrayStr(self):
s = _jclass.JClass('java.lang.String')(self)
return s.toString()
class ByteArrayCustomizer(object):
def canCustomize(self, name, jc):
if name == 'byte[]':
return True
return False
def customize(self, name, jc, bases, members):
members['__str__'] = _byteArrayStr
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