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//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
//
// Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
//
// Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
// Canada. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// cxoObjectType.c
// Defines the routines for handling Oracle type information.
//-----------------------------------------------------------------------------
#include "cxoModule.h"
//-----------------------------------------------------------------------------
// Declaration of functions
//-----------------------------------------------------------------------------
static void cxoObjectType_free(cxoObjectType*);
static PyObject *cxoObjectType_repr(cxoObjectType*);
static PyObject *cxoObjectType_newObject(cxoObjectType*, PyObject*, PyObject*);
static PyObject *cxoObjectType_richCompare(cxoObjectType*, PyObject*, int);
static PyObject *cxoObjectType_getElementType(cxoObjectType*, void*);
//-----------------------------------------------------------------------------
// declaration of methods
//-----------------------------------------------------------------------------
static PyMethodDef cxoMethods[] = {
{ "newobject", (PyCFunction) cxoObjectType_newObject,
METH_VARARGS | METH_KEYWORDS },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of members
//-----------------------------------------------------------------------------
static PyMemberDef cxoMembers[] = {
{ "schema", T_OBJECT, offsetof(cxoObjectType, schema), READONLY },
{ "name", T_OBJECT, offsetof(cxoObjectType, name), READONLY },
{ "attributes", T_OBJECT, offsetof(cxoObjectType, attributes), READONLY },
{ "iscollection", T_BOOL, offsetof(cxoObjectType, isCollection),
READONLY },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of calculated members
//-----------------------------------------------------------------------------
static PyGetSetDef cxoCalcMembers[] = {
{ "element_type", (getter) cxoObjectType_getElementType, 0, 0, 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// Python type declarations
//-----------------------------------------------------------------------------
PyTypeObject cxoPyTypeObjectType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "cx_Oracle.ObjectType",
.tp_basicsize = sizeof(cxoObjectType),
.tp_dealloc = (destructor) cxoObjectType_free,
.tp_repr = (reprfunc) cxoObjectType_repr,
.tp_call = (ternaryfunc) cxoObjectType_newObject,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_methods = cxoMethods,
.tp_members = cxoMembers,
.tp_getset = cxoCalcMembers,
.tp_richcompare = (richcmpfunc) cxoObjectType_richCompare
};
//-----------------------------------------------------------------------------
// cxoObjectType_initialize()
// Initialize the object type with the information that is required.
//-----------------------------------------------------------------------------
static int cxoObjectType_initialize(cxoObjectType *objType,
cxoConnection *connection)
{
dpiObjectAttr **attributes;
dpiObjectTypeInfo info;
cxoObjectAttr *attr;
uint16_t i;
// get object type information
if (dpiObjectType_getInfo(objType->handle, &info) < 0)
return cxoError_raiseAndReturnInt();
Py_INCREF(connection);
objType->connection = connection;
objType->schema = PyUnicode_Decode(info.schema, info.schemaLength,
connection->encodingInfo.encoding, NULL);
if (!objType->schema)
return -1;
objType->name = PyUnicode_Decode(info.name, info.nameLength,
connection->encodingInfo.encoding, NULL);
if (!objType->name)
return -1;
objType->isCollection = info.isCollection;
if (info.isCollection) {
objType->elementOracleTypeNum = info.elementTypeInfo.oracleTypeNum;
objType->elementTransformNum =
cxoTransform_getNumFromDataTypeInfo(&info.elementTypeInfo);
objType->elementDbType =
cxoDbType_fromTransformNum(objType->elementTransformNum);
if (!objType->elementDbType)
return -1;
Py_INCREF(objType->elementDbType);
if (info.elementTypeInfo.objectType) {
objType->elementObjectType = cxoObjectType_new(connection,
info.elementTypeInfo.objectType);
if (!objType->elementObjectType)
return -1;
}
}
// allocate the attribute list (temporary and permanent) and dictionary
objType->attributes = PyList_New(info.numAttributes);
if (!objType->attributes)
return -1;
objType->attributesByName = PyDict_New();
if (!objType->attributesByName)
return -1;
// get the list of attributes from DPI
attributes = PyMem_Malloc(sizeof(dpiObjectAttr*) * info.numAttributes);
if (!attributes) {
PyErr_NoMemory();
return -1;
}
if (dpiObjectType_getAttributes(objType->handle, info.numAttributes,
attributes) < 0) {
PyMem_Free(attributes);
return cxoError_raiseAndReturnInt();
}
// create attribute information for each attribute
for (i = 0; i < info.numAttributes; i++) {
attr = cxoObjectAttr_new(connection, attributes[i]);
if (!attr) {
PyMem_Free(attributes);
return -1;
}
PyList_SET_ITEM(objType->attributes, i, (PyObject*) attr);
if (PyDict_SetItem(objType->attributesByName, attr->name,
(PyObject*) attr) < 0)
return -1;
}
PyMem_Free(attributes);
return 0;
}
//-----------------------------------------------------------------------------
// cxoObjectType_new()
// Allocate a new object type.
//-----------------------------------------------------------------------------
cxoObjectType *cxoObjectType_new(cxoConnection *connection,
dpiObjectType *handle)
{
cxoObjectType *objType;
objType = (cxoObjectType*)
cxoPyTypeObjectType.tp_alloc(&cxoPyTypeObjectType, 0);
if (!objType)
return NULL;
if (dpiObjectType_addRef(handle) < 0) {
Py_DECREF(objType);
cxoError_raiseAndReturnNull();
return NULL;
}
objType->handle = handle;
if (cxoObjectType_initialize(objType, connection) < 0) {
Py_DECREF(objType);
return NULL;
}
return objType;
}
//-----------------------------------------------------------------------------
// cxoObjectType_newByName()
// Create a new object type given its name.
//-----------------------------------------------------------------------------
cxoObjectType *cxoObjectType_newByName(cxoConnection *connection,
PyObject *name)
{
cxoObjectType *objType;
dpiObjectType *handle;
cxoBuffer buffer;
int status;
if (cxoBuffer_fromObject(&buffer, name,
connection->encodingInfo.encoding) < 0)
return NULL;
status = dpiConn_getObjectType(connection->handle, buffer.ptr,
buffer.size, &handle);
cxoBuffer_clear(&buffer);
if (status < 0)
return (cxoObjectType*) cxoError_raiseAndReturnNull();
objType = cxoObjectType_new(connection, handle);
dpiObjectType_release(handle);
return objType;
}
//-----------------------------------------------------------------------------
// cxoObjectType_free()
// Free the memory associated with an object type.
//-----------------------------------------------------------------------------
static void cxoObjectType_free(cxoObjectType *objType)
{
if (objType->handle) {
dpiObjectType_release(objType->handle);
objType->handle = NULL;
}
Py_CLEAR(objType->connection);
Py_CLEAR(objType->schema);
Py_CLEAR(objType->name);
Py_CLEAR(objType->attributes);
Py_CLEAR(objType->attributesByName);
Py_CLEAR(objType->elementObjectType);
Py_CLEAR(objType->elementDbType);
Py_TYPE(objType)->tp_free((PyObject*) objType);
}
//-----------------------------------------------------------------------------
// cxoObjectType_getElementType()
// Return the element type associated with a collection. This is either an
// object type or one of the database type constants. If the object type is not
// a collection, None is returned.
//-----------------------------------------------------------------------------
static PyObject *cxoObjectType_getElementType(cxoObjectType *type,
void *unused)
{
if (type->elementObjectType) {
Py_INCREF(type->elementObjectType);
return (PyObject*) type->elementObjectType;
}
if (type->elementDbType) {
Py_INCREF(type->elementDbType);
return (PyObject*) type->elementDbType;
}
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// cxoObjectType_repr()
// Return a string representation of the object type.
//-----------------------------------------------------------------------------
static PyObject *cxoObjectType_repr(cxoObjectType *objType)
{
PyObject *module, *name, *result;
if (cxoUtils_getModuleAndName(Py_TYPE(objType), &module, &name) < 0)
return NULL;
result = cxoUtils_formatString("<%s.%s %s.%s>",
PyTuple_Pack(4, module, name, objType->schema, objType->name));
Py_DECREF(module);
Py_DECREF(name);
return result;
}
//-----------------------------------------------------------------------------
// cxoObjectType_richCompare()
// Peforms a comparison between the object type and another Python object.
// Equality (and inequality) are suppported to match object types; no other
// operations are supported.
//-----------------------------------------------------------------------------
static PyObject *cxoObjectType_richCompare(cxoObjectType* objType,
PyObject* otherObj, int op)
{
cxoObjectType *otherObjType;
int status, equal = 0;
// only equality and inequality can be checked
if (op != Py_EQ && op != Py_NE) {
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
// check to see if the other object is an object type, too
status = PyObject_IsInstance(otherObj, (PyObject*) &cxoPyTypeObjectType);
if (status < 0)
return NULL;
if (status == 1) {
otherObjType = (cxoObjectType*) otherObj;
if (otherObjType->connection == objType->connection ||
otherObjType->connection->sessionPool ==
objType->connection->sessionPool) {
equal = PyObject_RichCompareBool(otherObjType->schema,
objType->schema, Py_EQ);
if (equal < 0)
return NULL;
if (equal) {
equal = PyObject_RichCompareBool(otherObjType->name,
objType->name, Py_EQ);
if (equal < 0)
return NULL;
}
}
}
// determine return value
if ((equal && op == Py_EQ) || (!equal && op == Py_NE)) {
Py_RETURN_TRUE;
}
Py_RETURN_FALSE;
}
//-----------------------------------------------------------------------------
// cxoObjectType_newObject()
// Factory function for creating objects of the type which can be bound.
//-----------------------------------------------------------------------------
static PyObject *cxoObjectType_newObject(cxoObjectType *objType,
PyObject *args, PyObject *keywordArgs)
{
static char *keywordList[] = { "value", NULL };
PyObject *initialValue;
dpiObject *handle;
cxoObject *obj;
// parse arguments
initialValue = NULL;
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs, "|O", keywordList,
&initialValue))
return NULL;
// get handle to newly created object
if (dpiObjectType_createObject(objType->handle, &handle) < 0)
return cxoError_raiseAndReturnNull();
// create the object
obj = (cxoObject*) cxoObject_new(objType, handle);
if (!obj) {
dpiObject_release(handle);
return NULL;
}
// populate collection, if applicable
if (initialValue) {
if (cxoObject_internalExtend(obj, initialValue) < 0) {
Py_DECREF(obj);
return NULL;
}
}
return (PyObject*) obj;
}
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