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# Copyright (c) Corporation for National Research Initiatives
import java, org.python.core
import jast
funcs = {}
def call(func, this, args=None):
if not funcs.has_key(func):
jf = JavaFunction(func)
funcs[func] = jf
else:
jf = funcs[func]
if args is None:
return jf.call(this)
else:
return jf.invoke(this, args)
class Signature:
def __init__(self, name, inTypes, retType, isStatic=0, isPyArgs=0,
isConstructor=0):
self.isPyArgs = isPyArgs
self.isStatic = isStatic
self.retType = retType
self.inTypes = inTypes
self.name = name
self.isConstructor = isConstructor
def handle(self, callee, args, isa=1):
## if self.isPyArgs:
## pyargs = []
## for arg in args:
## pyargs.append(arg.asa(AnyType).getCode())
## return self.mkcall(callee, [Statement.PyObjectArray(pyargs)] )
if len(args) != len(self.inTypes):
return None
callargs = []
for i in range(len(args)):
#print i, args[i]
if isa:
callarg = args[i].isa(self.inTypes[i])
else:
callarg = args[i].asa(self.inTypes[i])
if callarg == None:
return None
callargs.append(callarg)
return self.mkcall(callee, callargs)
def mkcall(self, callee, args):
if self.isConstructor:
op = jast.New(self.name, args)
elif self.isStatic:
op = jast.InvokeStatic(callee, self.name, args)
else:
#print callee, self.name, args
op = jast.Invoke(callee, self.name, args)
return op, self.retType
def __repr__(self):
r = []
for arg in self.inTypes:
r.append(arg.name)
COMMASPACE = ', '
return '(%s)->%s' % (COMMASPACE.join(r), self.retType.name)
class JavaFunction:
def __init__(self, reflectedFunction):
self.name = reflectedFunction.__name__
self.isConstructor = isinstance(reflectedFunction,
org.python.core.PyReflectedConstructor)
sigs = []
self.callee = None
for i in range(reflectedFunction.nargs):
sigs.append(self.makeSignature(reflectedFunction.argslist[i]))
self.sigs = sigs
self.function = reflectedFunction
self.declaringClass = self.function.argslist[0].declaringClass
def makeSignature(self, rargs):
inTypes = list(rargs.args)
isPyArgs = rargs.flags == rargs.PyArgsCall
isStatic = rargs.isStatic
name = rargs.data.name
if self.isConstructor:
outType = rargs.data.declaringClass
else:
outType = rargs.data.returnType
if isStatic:
self.callee = rargs.data.declaringClass.__name__
return Signature(name, inTypes, outType, isStatic, isPyArgs,
self.isConstructor)
def __repr__(self):
if len(self.sigs) == 1:
return self.name+repr(self.sigs[0])
else:
return self.name+repr(self.sigs)
def call(self, args):
for isa in [1, 0]:
for sig in self.sigs:
ret = sig.handle(self.callee, args, isa=isa)
if ret is None:
continue
return ret
raise TypeError, repr(args)+' args do not match: '+repr(self)
def invoke(self, this, args):
this = this.asa(self.declaringClass)
for isa in [1, 0]:
for sig in self.sigs:
ret = sig.handle(this, args, isa=isa)
if ret is None:
continue
return ret
raise TypeError, repr(args)+' args do not match: '+repr(self)
if __name__ == '__main__':
f = JavaFunction(org.python.core.PyObject._add)
print f
class Object:
def __init__(self, code, istypes, astypes):
self.code = code
self.istypes = istypes
self.astypes = astypes
def isa(self, type):
if type in self.istypes:
return self.code
def asa(self, type):
if type in self.istypes:
return self.code
for astype, ascode in self.astypes:
if astype == type:
return ascode
one = Object(jast.IntegerConstant(1), [java.lang.Integer.TYPE],
[(org.python.core.PyObject, jast.Identifier("one"))])
foo = Object(jast.Identifier("foo"), [org.python.core.PyObject],
[(java.lang.Integer.TYPE,
jast.InvokeStatic("Py", "toint",
[jast.Identifier("foo")]))])
print f.invoke(foo, [one])
print f.invoke(foo, [foo])
print call(org.python.core.Py.py2int, [one])
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