Revert adodbapi changes

Author: Avasam

adodbapi/__init__.py

@@ -36,8 +36,6 @@
 )
 
 
-# -----------------------------------------------------------
-# conversion functions mandated by PEP 249
 def Binary(aString):
     """This function constructs an object capable of holding a binary (long) string value."""
     return bytes(aString)

adodbapi/adodbapi.py

@@ -23,54 +23,86 @@
 
 DB-API 2.0 specification: http://www.python.org/dev/peps/pep-0249/
 
-This module source should run correctly in CPython 3.4 or later.
+This module source should run correctly in CPython versions 2.7 and later,
+or IronPython version 2.7 and later,
+or, after running through 2to3.py, CPython 3.4 or later.
 """
+
+__version__ = "2.6.2.0"
+version = "adodbapi v" + __version__
+
 import copy
 import decimal
 import os
 import sys
 import weakref
 
-import pythoncom
-import pywintypes
-from win32com.client import Dispatch
-
 from . import ado_consts as adc, apibase as api, process_connect_string
 
-try:
-    import pythoncom
-    import pywintypes
-    import win32com.client
-
-    onWin32 = True
-except ImportError:
-    import warnings
-
-    warnings.warn("pywin32 package required for adodbapi.", ImportWarning)
-    onWin32 = False  # assume the worst
-
-__version__ = "3.7.0.0"
-version = "adodbapi v" + __version__
-
 try:
     verbose = int(os.environ["ADODBAPI_VERBOSE"])
 except:
     verbose = False
 if verbose:
     print(version)
 
+# --- define objects to smooth out IronPython <-> CPython differences
+onWin32 = False  # assume the worst
+if api.onIronPython:
+    from clr import Reference
+    from System import (
+        Activator,
+        Array,
+        Byte,
+        DateTime,
+        DBNull,
+        Decimal as SystemDecimal,
+        Type,
+    )
+
+    def Dispatch(dispatch):
+        type = Type.GetTypeFromProgID(dispatch)
+        return Activator.CreateInstance(type)
+
+    def getIndexedValue(obj, index):
+        return obj.Item[index]
+
+else:  # try pywin32
+    try:
+        import pythoncom
+        import pywintypes
+        import win32com.client
+
+        onWin32 = True
 
-def getIndexedValue(obj, index):
-    return obj(index)
+        def Dispatch(dispatch):
+            return win32com.client.Dispatch(dispatch)
+
+    except ImportError:
+        import warnings
+
+        warnings.warn(
+            "pywin32 package (or IronPython) required for adodbapi.", ImportWarning
+        )
+
+    def getIndexedValue(obj, index):
+        return obj(index)
 
 
 from collections.abc import Mapping
 
+# --- define objects to smooth out Python3000 <-> Python 2.x differences
+unicodeType = str
+longType = int
+StringTypes = str
+maxint = sys.maxsize
+
 
 # -----------------  The .connect method -----------------
 def make_COM_connecter():
     try:
-        pythoncom.CoInitialize()  # v2.1 Paj
+        if onWin32:
+            pythoncom.CoInitialize()  # v2.1 Paj
         c = Dispatch("ADODB.Connection")  # connect _after_ CoIninialize v2.1.1 adamvan
     except:
         raise api.InterfaceError(
@@ -166,7 +198,7 @@ def _configure_parameter(p, value, adotype, settings_known):
         p.Size = len(value)
         p.AppendChunk(value)
 
-    elif isinstance(value, str):  # v2.1 Jevon
+    elif isinstance(value, StringTypes):  # v2.1 Jevon
         L = len(value)
         if adotype in api.adoStringTypes:  # v2.2.1 Cole
             if settings_known:
@@ -178,7 +210,12 @@ def _configure_parameter(p, value, adotype, settings_known):
             p.Size = L  # v2.1 Jevon
 
     elif isinstance(value, decimal.Decimal):
-        p.Value = value
+        if api.onIronPython:
+            s = str(value)
+            p.Value = s
+            p.Size = len(s)
+        else:
+            p.Value = value
         exponent = value.as_tuple()[2]
         digit_count = len(value.as_tuple()[1])
         p.Precision = digit_count
@@ -201,6 +238,10 @@ def _configure_parameter(p, value, adotype, settings_known):
             p.Value = s
             p.Size = len(s)
 
+    elif api.onIronPython and isinstance(value, longType):  # Iron Python Long
+        s = str(value)  # feature workaround for IPy 2.0
+        p.Value = s
+
     elif adotype == adc.adEmpty:  # ADO will not let you specify a null column
         p.Type = (
             adc.adInteger
@@ -213,7 +254,7 @@ def _configure_parameter(p, value, adotype, settings_known):
 
 
 # # # # # ----- the Class that defines a connection ----- # # # # #
-class Connection:
+class Connection(object):
     # include connection attributes as class attributes required by api definition.
     Warning = api.Warning
     Error = api.Error
@@ -524,7 +565,7 @@ def get_table_names(self):
 
 
 # # # # # ----- the Class that defines a cursor ----- # # # # #
-class Cursor:
+class Cursor(object):
     ## ** api required attributes:
     ## description...
     ##    This read-only attribute is a sequence of 7-item sequences.
@@ -612,7 +653,7 @@ def build_column_info(self, recordset):
             self.numberOfColumns = 0
             return
         self.rs = recordset  # v2.1.1 bkline
-        self.recordset_format = api.RS_WIN_32
+        self.recordset_format = api.RS_ARRAY if api.onIronPython else api.RS_WIN_32
         self.numberOfColumns = recordset.Fields.Count
         try:
             varCon = self.connection.variantConversions
@@ -749,7 +790,12 @@ def _execute_command(self):
             print('Executing command="%s"' % self.commandText)
         try:
             # ----- the actual SQL is executed here ---
-            recordset, count = self.cmd.Execute()
+            if api.onIronPython:
+                ra = Reference[int]()
+                recordset = self.cmd.Execute(ra)
+                count = ra.Value
+            else:  # pywin32
+                recordset, count = self.cmd.Execute()
             # ----- ------------------------------- ---
         except Exception as e:
             _message = ""
@@ -1134,11 +1180,21 @@ def nextset(self):
             )
             return None
 
-        try:  # [begin 2.1 ekelund]
-            rsTuple = self.rs.NextRecordset()  #
-        except pywintypes.com_error as exc:  # return appropriate error
-            self._raiseCursorError(api.NotSupportedError, exc.args)  # [end 2.1 ekelund]
-        recordset = rsTuple[0]
+        if api.onIronPython:
+            try:
+                recordset = self.rs.NextRecordset()
+            except TypeError:
+                recordset = None
+            except api.Error as exc:
+                self._raiseCursorError(api.NotSupportedError, exc.args)
+        else:  # pywin32
+            try:  # [begin 2.1 ekelund]
+                rsTuple = self.rs.NextRecordset()  #
+            except pywintypes.com_error as exc:  # return appropriate error
+                self._raiseCursorError(
+                    api.NotSupportedError, exc.args
+                )  # [end 2.1 ekelund]
+            recordset = rsTuple[0]
         if recordset is None:
             return None
         self.build_column_info(recordset)