static PyObject *
create_types_func(PyObject *self, PyObject *args)
{
int rval;
avro_schema_t schema;
PyObject *schema_json;
ConvertInfo info;
PyObject *schema_json_bytes;
if (!PyArg_ParseTuple(args, "O", &schema_json)) {
return NULL;
}
schema_json_bytes = pystring_to_pybytes(schema_json);
rval = avro_schema_from_json(pybytes_to_chars(schema_json_bytes), 0, &schema, NULL);
Py_DECREF(schema_json_bytes);
if (rval != 0 || schema == NULL) {
PyErr_Format(PyExc_IOError, "Error reading schema: %s", avro_strerror());
return NULL;
}
info.types = PyObject_CallFunctionObjArgs((PyObject *)get_avro_types_type(), NULL);
if (info.types == NULL) {
/* XXX: is the exception already set? */
return NULL;
}
declare_types(&info, schema);
return info.types;
}
static int
AvroDeserializer_init(AvroDeserializer *self, PyObject *args, PyObject *kwds)
{
int rval;
PyObject *types = NULL;
const char *schema_json;
static char *kwlist[] = {"schema", "types", NULL};
self->flags = 0;
self->iface = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|O", kwlist,
&schema_json, &types)) {
return -1;
}
rval = avro_schema_from_json(schema_json, 0, &self->schema, NULL);
if (rval != 0 || self->schema == NULL) {
PyErr_Format(PyExc_IOError, "Error reading schema: %s",
avro_strerror());
return -1;
}
self->flags |= DESERIALIZER_SCHEMA_OK;
self->iface = avro_generic_class_from_schema(self->schema);
if (self->iface == NULL) {
PyErr_SetString(PyExc_IOError,
"Error creating generic class interface");
return -1;
}
self->datum_reader = avro_reader_memory(0, 0);
if (!self->datum_reader) {
PyErr_NoMemory();
return -1;
}
self->flags |= DESERIALIZER_READER_OK;
/* copied verbatim from filereader */
if (types != NULL && PyObject_IsTrue(types)) {
/* we still haven't incref'ed types here */
if (Py_TYPE(types) == get_avro_types_type()) {
Py_INCREF(types);
self->info.types = types;
} else {
self->info.types = PyObject_CallFunctionObjArgs(
(PyObject *) get_avro_types_type(), NULL);
if (self->info.types == NULL) {
return -1;
}
declare_types(&self->info, self->schema);
}
} else {
self->info.types = NULL;
}
return 0;
}
PyObject *
declare_types(ConvertInfo *info, avro_schema_t schema)
{
avro_type_t type = schema->type;
switch (type) {
case AVRO_NULL:
/* PyNone_Type is not publicly visible */
return (PyObject *)Py_TYPE(Py_None);
case AVRO_BOOLEAN:
return (PyObject *)&PyBool_Type;
case AVRO_BYTES:
case AVRO_STRING:
case AVRO_FIXED:
return (PyObject *)&PyString_Type;
case AVRO_DOUBLE:
case AVRO_FLOAT:
return (PyObject *)&PyFloat_Type;
case AVRO_INT32:
return (PyObject *)&PyInt_Type;
case AVRO_ENUM:
return get_python_enum_type(info->types, schema);
case AVRO_INT64:
return (PyObject *)&PyLong_Type;
case AVRO_ARRAY:
declare_types(info, avro_schema_array_items(schema));
return (PyObject *)&PyList_Type;
case AVRO_MAP:
declare_types(info, avro_schema_map_values(schema));
return (PyObject *)&PyDict_Type;
case AVRO_UNION:
{
size_t union_size = avro_schema_union_size(schema);
size_t i;
for (i = 0; i < union_size; i++) {
declare_types(info, avro_schema_union_branch(schema, i));
}
}
return (PyObject *)&PyBaseObject_Type; /* XXX list of types might be better */
case AVRO_RECORD:
{
size_t field_count = avro_schema_record_size(schema);
size_t i;
const char *record_name = avro_schema_name(schema);
PyObject *record_type = PyObject_GetAttrString(info->types, record_name);
PyObject *field_types;
if (record_type != NULL) {
/* already declared this record type */
Py_DECREF(record_type);
return record_type;
}
/* create the Python type for this schema */
record_type = get_python_obj_type(info->types, schema);
field_types = PyObject_GetAttrString(record_type, "_fieldtypes");
for (i = 0; i < field_count; i++) {
PyObject *field_type = declare_types(info, avro_schema_record_field_get_by_index(schema, i));
/* this will INCREF, so takes hold of the object */
PyMapping_SetItemString(field_types, (char*)avro_schema_record_field_name(schema, i), field_type);
}
Py_DECREF(field_types);
return record_type;
}
case AVRO_LINK:
return declare_types(info, avro_schema_link_target(schema));
default:
/* other types don't hold records */
break;
}
return NULL;
}
static int
AvroFileReader_init(AvroFileReader *self, PyObject *args, PyObject *kwds)
{
int rval;
PyObject *pyfile;
PyObject *types = NULL;
FILE *file;
char *schema_json;
avro_writer_t schema_json_writer;
size_t len;
static char *kwlist[] = {"file", "types", NULL};
self->pyfile = NULL;
self->flags = 0;
self->iface = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O", kwlist,
&pyfile, &types)) {
return -1;
}
file = PyFile_AsFile(pyfile);
if (file == NULL) {
return -1;
}
self->pyfile = pyfile;
Py_INCREF(pyfile);
if (avro_file_reader_fp(file, "pyfile", 0, &self->reader)) {
PyErr_Format(PyExc_IOError, "Error opening file: %s", avro_strerror());
return -1;
}
self->flags |= AVROFILE_READER_OK;
self->schema = avro_file_reader_get_writer_schema(self->reader);
if (self->schema == NULL) {
PyErr_Format(PyExc_IOError, "Error reading schema: %s", avro_strerror());
return -1;
}
len = 256;
do {
/* XXX horrible loop to get a big enough buffer for schema. */
len *= 2;
schema_json = (char *)PyMem_Malloc(len);
schema_json_writer = avro_writer_memory(schema_json, len);
rval = avro_schema_to_json(self->schema, schema_json_writer);
if (!rval) {
rval = avro_write(schema_json_writer, (void *)"", 1); /* zero terminate */
if (!rval) {
self->schema_json = PyString_FromString(schema_json);
}
}
avro_writer_free(schema_json_writer);
PyMem_Free(schema_json);
} while (rval == ENOSPC);
if (rval) {
PyErr_Format(PyExc_IOError, "Error saving schema: %s", avro_strerror());
return -1;
}
self->flags |= AVROFILE_SCHEMA_OK;
self->iface = avro_generic_class_from_schema(self->schema);
if (self->iface == NULL) {
PyErr_SetString(PyExc_IOError, "Error creating generic class interface");
return -1;
}
if (types != NULL && PyObject_IsTrue(types)) {
/* we still haven't incref'ed types here */
if (Py_TYPE(types) == get_avro_types_type()) {
Py_INCREF(types);
self->info.types = types;
} else {
self->info.types = PyObject_CallFunctionObjArgs((PyObject *)get_avro_types_type(), NULL);
if (self->info.types == NULL) {
return -1;
}
declare_types(&self->info, self->schema);
}
} else {
self->info.types = NULL;
}
return 0;
}
