#*****************************************************************************
#   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 operator
import _jpype
import _jclass
import _jwrapper

_CLASSES = {}
_CUSTOMIZERS = []

def _initialize() :
	_jpype.setJavaArrayClass(_JavaArrayClass)
	_jpype.setGetJavaArrayClassMethod(_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 ) : 
		return _jpype.getArrayItem(self.__javaobject__, ndx)
		
	def __setitem__(self, ndx, val) : 
		_jpype.setArrayItem(self.__javaobject__, ndx, val)
		
	def __getslice__(self, i, j) : 
		return _jpype.getArraySlice(self.__javaobject__, i, j)
		
	def __setslice__(self, i, j, v) : 
		_jpype.setArraySlice(self.__javaobject__, i, j, v)

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 ParameterException, "Array classes only take 2 parameters, %s given" % (len(args)+1,)
	else:
		values = None
		if operator.isSequenceType(args[0]) :
			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.setArrayValues(self.__javaobject__, 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]
		
class _JavaArray(type) :
	pass

def _defineArrayClass(name, jt):
	members = {
		"__init__" : _jarrayInit,
		"__javaclass__" : jt,
	}
	
	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 not _CLASSES.has_key(name) :
		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 represeing 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   
	
		
	
		
	
	