size_t avro_schema_union_size(const avro_schema_t union_schema)
{
check_param(EINVAL, is_avro_schema(union_schema), "union schema");
check_param(EINVAL, is_avro_union(union_schema), "union schema");
struct avro_union_schema_t *unionp = avro_schema_to_union(union_schema);
return unionp->branches->num_entries;
}
static int
avro_datum_value_get_current_branch(const avro_value_iface_t *iface,
const void *vself, avro_value_t *branch)
{
AVRO_UNUSED(iface);
const avro_datum_t self = (const avro_datum_t) vself;
check_param(EINVAL, self, "datum instance");
if (!is_avro_union(self)) {
avro_set_error("Can only get current branch of union");
return EINVAL;
}
avro_datum_t child_datum = avro_union_current_branch(self);
return avro_datum_as_child_value(branch, child_datum);
}
static int
avro_datum_value_get_discriminant(const avro_value_iface_t *iface,
const void *vself, int *out)
{
AVRO_UNUSED(iface);
const avro_datum_t self = (const avro_datum_t) vself;
check_param(EINVAL, self, "datum instance");
if (!is_avro_union(self)) {
avro_set_error("Can only get discriminant of union");
return EINVAL;
}
*out = avro_union_discriminant(self);
return 0;
}
int
avro_schema_union_append(const avro_schema_t union_schema,
const avro_schema_t schema)
{
check_param(EINVAL, is_avro_schema(union_schema), "union schema");
check_param(EINVAL, is_avro_union(union_schema), "union schema");
check_param(EINVAL, is_avro_schema(schema), "schema");
struct avro_union_schema_t *unionp = avro_schema_to_union(union_schema);
int new_index = unionp->branches->num_entries;
st_insert(unionp->branches, new_index, (st_data_t) schema);
const char *name = avro_schema_type_name(schema);
st_insert(unionp->branches_byname, (st_data_t) name,
(st_data_t) new_index);
avro_schema_incref(schema);
return 0;
}
static int
avro_datum_value_set_branch(const avro_value_iface_t *iface,
void *vself, int discriminant,
avro_value_t *branch)
{
AVRO_UNUSED(iface);
const avro_datum_t self = (const avro_datum_t) vself;
check_param(EINVAL, self, "datum instance");
if (!is_avro_union(self)) {
avro_set_error("Can only set branch of union");
return EINVAL;
}
int rval;
avro_datum_t child_datum;
check(rval, avro_union_set_discriminant(self, discriminant, &child_datum));
return avro_datum_as_child_value(branch, child_datum);
}
int avro_schema_equal(avro_schema_t a, avro_schema_t b)
{
if (!a || !b) {
/*
* this is an error. protecting from segfault.
*/
return 0;
} else if (a == b) {
/*
* an object is equal to itself
*/
return 1;
} else if (avro_typeof(a) != avro_typeof(b)) {
return 0;
} else if (is_avro_record(a)) {
return schema_record_equal(avro_schema_to_record(a),
avro_schema_to_record(b));
} else if (is_avro_enum(a)) {
return schema_enum_equal(avro_schema_to_enum(a),
avro_schema_to_enum(b));
} else if (is_avro_fixed(a)) {
return schema_fixed_equal(avro_schema_to_fixed(a),
avro_schema_to_fixed(b));
} else if (is_avro_map(a)) {
return schema_map_equal(avro_schema_to_map(a),
avro_schema_to_map(b));
} else if (is_avro_array(a)) {
return schema_array_equal(avro_schema_to_array(a),
avro_schema_to_array(b));
} else if (is_avro_union(a)) {
return schema_union_equal(avro_schema_to_union(a),
avro_schema_to_union(b));
} else if (is_avro_link(a)) {
return schema_link_equal(avro_schema_to_link(a),
avro_schema_to_link(b));
}
return 1;
}
const char *avro_schema_type_name(const avro_schema_t schema)
{
if (is_avro_record(schema)) {
return (avro_schema_to_record(schema))->name;
} else if (is_avro_enum(schema)) {
return (avro_schema_to_enum(schema))->name;
} else if (is_avro_fixed(schema)) {
return (avro_schema_to_fixed(schema))->name;
} else if (is_avro_union(schema)) {
return "union";
} else if (is_avro_array(schema)) {
return "array";
} else if (is_avro_map(schema)) {
return "map";
} else if (is_avro_int32(schema)) {
return "int";
} else if (is_avro_int64(schema)) {
return "long";
} else if (is_avro_float(schema)) {
return "float";
} else if (is_avro_double(schema)) {
return "double";
} else if (is_avro_boolean(schema)) {
return "boolean";
} else if (is_avro_null(schema)) {
return "null";
} else if (is_avro_string(schema)) {
return "string";
} else if (is_avro_bytes(schema)) {
return "bytes";
} else if (is_avro_link(schema)) {
avro_schema_t target = avro_schema_link_target(schema);
return avro_schema_type_name(target);
}
avro_set_error("Unknown schema type");
return NULL;
}
avro_schema_t avro_schema_get_subschema(const avro_schema_t schema,
const char *name)
{
if (is_avro_record(schema)) {
const struct avro_record_schema_t *rschema =
avro_schema_to_record(schema);
union {
st_data_t data;
struct avro_record_field_t *field;
} field;
if (st_lookup(rschema->fields_byname,
(st_data_t) name, &field.data))
{
return field.field->type;
}
avro_set_error("No record field named %s", name);
return NULL;
} else if (is_avro_union(schema)) {
const struct avro_union_schema_t *uschema =
avro_schema_to_union(schema);
long i;
for (i = 0; i < uschema->branches->num_entries; i++) {
union {
st_data_t data;
avro_schema_t schema;
} val;
st_lookup(uschema->branches, i, &val.data);
if (strcmp(avro_schema_type_name(val.schema),
name) == 0)
{
return val.schema;
}
}
avro_set_error("No union branch named %s", name);
return NULL;
} else if (is_avro_array(schema)) {
if (strcmp(name, "[]") == 0) {
const struct avro_array_schema_t *aschema =
avro_schema_to_array(schema);
return aschema->items;
}
avro_set_error("Array subschema must be called \"[]\"");
return NULL;
} else if (is_avro_map(schema)) {
if (strcmp(name, "{}") == 0) {
const struct avro_map_schema_t *mschema =
avro_schema_to_map(schema);
return mschema->values;
}
avro_set_error("Map subschema must be called \"{}\"");
return NULL;
}
avro_set_error("Can only retrieve subschemas from record, union, array, or map");
return NULL;
}
avro_schema_t avro_schema_string(void)
{
static struct avro_obj_t obj = {
.type = AVRO_STRING,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_bytes(void)
{
static struct avro_obj_t obj = {
.type = AVRO_BYTES,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_int(void)
{
static struct avro_obj_t obj = {
.type = AVRO_INT32,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_long(void)
{
static struct avro_obj_t obj = {
.type = AVRO_INT64,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_float(void)
{
static struct avro_obj_t obj = {
.type = AVRO_FLOAT,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_double(void)
{
static struct avro_obj_t obj = {
.type = AVRO_DOUBLE,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_boolean(void)
{
static struct avro_obj_t obj = {
.type = AVRO_BOOLEAN,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_null(void)
{
static struct avro_obj_t obj = {
.type = AVRO_NULL,
.class_type = AVRO_SCHEMA,
.refcount = 1
};
return &obj;
}
avro_schema_t avro_schema_fixed(const char *name, const int64_t size)
{
struct avro_fixed_schema_t *fixed =
malloc(sizeof(struct avro_fixed_schema_t));
if (!fixed) {
return NULL;
}
if (!is_avro_id(name)) {
return NULL;
}
fixed->name = strdup(name);
fixed->size = size;
avro_schema_init(&fixed->obj, AVRO_FIXED);
return &fixed->obj;
}
avro_schema_t avro_schema_union(void)
{
struct avro_union_schema_t *schema =
malloc(sizeof(struct avro_union_schema_t));
if (!schema) {
return NULL;
}
schema->branches = st_init_numtable_with_size(DEFAULT_TABLE_SIZE);
if (!schema->branches) {
free(schema);
return NULL;
}
avro_schema_init(&schema->obj, AVRO_UNION);
return &schema->obj;
}
int
avro_schema_union_append(const avro_schema_t union_schema,
const avro_schema_t schema)
{
struct avro_union_schema_t *unionp;
if (!union_schema || !schema || !is_avro_union(union_schema)) {
return EINVAL;
}
unionp = avro_schema_to_union(union_schema);
st_insert(unionp->branches, unionp->branches->num_entries,
(st_data_t) schema);
avro_schema_incref(schema);
return 0;
}
avro_schema_t avro_schema_array(const avro_schema_t items)
{
struct avro_array_schema_t *array =
malloc(sizeof(struct avro_array_schema_t));
if (!array) {
return NULL;
}
array->items = avro_schema_incref(items);
avro_schema_init(&array->obj, AVRO_ARRAY);
return &array->obj;
}
avro_schema_t avro_schema_map(const avro_schema_t values)
{
struct avro_map_schema_t *map =
malloc(sizeof(struct avro_map_schema_t));
if (!map) {
return NULL;
}
map->values = avro_schema_incref(values);
avro_schema_init(&map->obj, AVRO_MAP);
return &map->obj;
}
avro_schema_t avro_schema_enum(const char *name)
{
struct avro_enum_schema_t *enump;
if (!is_avro_id(name)) {
return NULL;
}
enump = malloc(sizeof(struct avro_enum_schema_t));
if (!enump) {
return NULL;
}
enump->name = strdup(name);
if (!enump->name) {
free(enump);
return NULL;
}
enump->symbols = st_init_numtable_with_size(DEFAULT_TABLE_SIZE);
if (!enump->symbols) {
free(enump->name);
free(enump);
return NULL;
}
enump->symbols_byname = st_init_strtable_with_size(DEFAULT_TABLE_SIZE);
if (!enump->symbols_byname) {
st_free_table(enump->symbols);
free(enump->name);
free(enump);
return NULL;
}
avro_schema_init(&enump->obj, AVRO_ENUM);
return &enump->obj;
}
int
avro_schema_enum_symbol_append(const avro_schema_t enum_schema,
const char *symbol)
{
struct avro_enum_schema_t *enump;
char *sym;
long idx;
if (!enum_schema || !symbol || !is_avro_enum(enum_schema)) {
return EINVAL;
}
enump = avro_schema_to_enum(enum_schema);
sym = strdup(symbol);
if (!sym) {
return ENOMEM;
}
idx = enump->symbols->num_entries;
st_insert(enump->symbols, (st_data_t) idx, (st_data_t) sym);
st_insert(enump->symbols_byname, (st_data_t) sym, (st_data_t) idx);
return 0;
}
int
avro_schema_record_field_append(const avro_schema_t record_schema,
const char *field_name,
const avro_schema_t field_schema)
{
struct avro_record_schema_t *record;
struct avro_record_field_t *new_field;
if (!field_name || !field_schema || !is_avro_schema(record_schema)
|| !is_avro_record(record_schema) || record_schema == field_schema
|| !is_avro_id(field_name)) {
return EINVAL;
}
record = avro_schema_to_record(record_schema);
new_field = malloc(sizeof(struct avro_record_field_t));
if (!new_field) {
return ENOMEM;
}
new_field->name = strdup(field_name);
new_field->type = avro_schema_incref(field_schema);
st_insert(record->fields, record->fields->num_entries,
(st_data_t) new_field);
st_insert(record->fields_byname, (st_data_t) new_field->name,
(st_data_t) new_field);
return 0;
}
avro_schema_t avro_schema_record(const char *name, const char *space)
{
struct avro_record_schema_t *record;
if (!is_avro_id(name)) {
return NULL;
}
record = malloc(sizeof(struct avro_record_schema_t));
if (!record) {
return NULL;
}
record->name = strdup(name);
if (!record->name) {
free(record);
return NULL;
}
record->space = space ? strdup(space) : NULL;
if (space && !record->space) {
free(record->name);
free(record);
return NULL;
}
record->fields = st_init_numtable_with_size(DEFAULT_TABLE_SIZE);
if (!record->fields) {
if (record->space) {
free(record->space);
}
free(record->name);
free(record);
return NULL;
}
record->fields_byname = st_init_strtable_with_size(DEFAULT_TABLE_SIZE);
if (!record->fields_byname) {
st_free_table(record->fields);
free(record->name);
free(record);
return NULL;
}
avro_schema_init(&record->obj, AVRO_RECORD);
return &record->obj;
}
static int
save_named_schemas(const char *name, avro_schema_t schema,
avro_schema_error_t * error)
{
st_table *st = (*error)->named_schemas;
return st_insert(st, (st_data_t) name, (st_data_t) schema);
}
static avro_schema_t
find_named_schemas(const char *name, avro_schema_error_t * error)
{
st_table *st = (*error)->named_schemas;
union {
avro_schema_t schema;
st_data_t data;
} val;
if (st_lookup(st, (st_data_t) name, &(val.data))) {
return val.schema;
}
return NULL;
};
avro_schema_t avro_schema_link(avro_schema_t to)
{
struct avro_link_schema_t *link;
if (!is_avro_named_type(to)) {
return NULL;
}
link = malloc(sizeof(struct avro_link_schema_t));
if (!link) {
return NULL;
}
link->to = avro_schema_incref(to);
avro_schema_init(&link->obj, AVRO_LINK);
return &link->obj;
}
static int
avro_type_from_json_t(json_t * json, avro_type_t * type,
avro_schema_error_t * error, avro_schema_t * named_type)
{
json_t *json_type;
const char *type_str;
if (json_is_array(json)) {
*type = AVRO_UNION;
return 0;
} else if (json_is_object(json)) {
json_type = json_object_get(json, "type");
} else {
json_type = json;
}
if (!json_is_string(json_type)) {
return EINVAL;
}
type_str = json_string_value(json_type);
if (!type_str) {
return EINVAL;
}
/*
* TODO: gperf/re2c this
*/
if (strcmp(type_str, "string") == 0) {
*type = AVRO_STRING;
} else if (strcmp(type_str, "bytes") == 0) {
*type = AVRO_BYTES;
} else if (strcmp(type_str, "int") == 0) {
*type = AVRO_INT32;
} else if (strcmp(type_str, "long") == 0) {
*type = AVRO_INT64;
} else if (strcmp(type_str, "float") == 0) {
*type = AVRO_FLOAT;
} else if (strcmp(type_str, "double") == 0) {
*type = AVRO_DOUBLE;
} else if (strcmp(type_str, "boolean") == 0) {
*type = AVRO_BOOLEAN;
} else if (strcmp(type_str, "null") == 0) {
*type = AVRO_NULL;
} else if (strcmp(type_str, "record") == 0) {
*type = AVRO_RECORD;
} else if (strcmp(type_str, "enum") == 0) {
*type = AVRO_ENUM;
} else if (strcmp(type_str, "array") == 0) {
*type = AVRO_ARRAY;
} else if (strcmp(type_str, "map") == 0) {
*type = AVRO_MAP;
} else if (strcmp(type_str, "fixed") == 0) {
*type = AVRO_FIXED;
} else if ((*named_type = find_named_schemas(type_str, error))) {
*type = AVRO_LINK;
} else {
return EINVAL;
}
return 0;
}
static int
avro_schema_from_json_t(json_t * json, avro_schema_t * schema,
avro_schema_error_t * error)
{
avro_type_t type = 0;
unsigned int i;
avro_schema_t named_schemas = NULL;
if (avro_type_from_json_t(json, &type, error, &named_schemas)) {
return EINVAL;
}
switch (type) {
case AVRO_LINK:
*schema = avro_schema_link(named_schemas);
break;
case AVRO_STRING:
*schema = avro_schema_string();
break;
case AVRO_BYTES:
*schema = avro_schema_bytes();
break;
case AVRO_INT32:
*schema = avro_schema_int();
break;
case AVRO_INT64:
*schema = avro_schema_long();
break;
case AVRO_FLOAT:
*schema = avro_schema_float();
break;
case AVRO_DOUBLE:
*schema = avro_schema_double();
break;
case AVRO_BOOLEAN:
*schema = avro_schema_boolean();
break;
case AVRO_NULL:
*schema = avro_schema_null();
break;
case AVRO_RECORD:
{
json_t *json_name = json_object_get(json, "name");
json_t *json_namespace =
json_object_get(json, "namespace");
json_t *json_fields = json_object_get(json, "fields");
unsigned int num_fields;
const char *record_name;
const char *record_namespace;
if (!json_is_string(json_name)) {
return EINVAL;
}
if (!json_is_array(json_fields)) {
return EINVAL;
}
num_fields = json_array_size(json_fields);
if (num_fields == 0) {
return EINVAL;
}
record_name = json_string_value(json_name);
if (!record_name) {
return EINVAL;
}
if (json_is_string(json_namespace)) {
record_namespace =
json_string_value(json_namespace);
} else {
record_namespace = NULL;
}
*schema =
avro_schema_record(record_name, record_namespace);
if (save_named_schemas(record_name, *schema, error)) {
return ENOMEM;
}
for (i = 0; i < num_fields; i++) {
json_t *json_field =
json_array_get(json_fields, i);
json_t *json_field_name;
json_t *json_field_type;
avro_schema_t json_field_type_schema;
int field_rval;
if (!json_is_object(json_field)) {
avro_schema_decref(*schema);
return EINVAL;
}
json_field_name =
json_object_get(json_field, "name");
if (!json_field_name) {
avro_schema_decref(*schema);
return EINVAL;
}
json_field_type =
json_object_get(json_field, "type");
if (!json_field_type) {
avro_schema_decref(*schema);
return EINVAL;
}
field_rval =
avro_schema_from_json_t(json_field_type,
&json_field_type_schema,
error);
if (field_rval) {
avro_schema_decref(*schema);
return field_rval;
}
field_rval =
avro_schema_record_field_append(*schema,
json_string_value
(json_field_name),
json_field_type_schema);
avro_schema_decref(json_field_type_schema);
if (field_rval != 0) {
avro_schema_decref(*schema);
return field_rval;
}
}
}
break;
case AVRO_ENUM:
{
json_t *json_name = json_object_get(json, "name");
json_t *json_symbols = json_object_get(json, "symbols");
const char *name;
unsigned int num_symbols;
if (!json_is_string(json_name)) {
return EINVAL;
}
if (!json_is_array(json_symbols)) {
return EINVAL;
}
name = json_string_value(json_name);
if (!name) {
return EINVAL;
}
num_symbols = json_array_size(json_symbols);
if (num_symbols == 0) {
return EINVAL;
}
*schema = avro_schema_enum(name);
if (save_named_schemas(name, *schema, error)) {
return ENOMEM;
}
for (i = 0; i < num_symbols; i++) {
int enum_rval;
json_t *json_symbol =
json_array_get(json_symbols, i);
const char *symbol;
if (!json_is_string(json_symbol)) {
avro_schema_decref(*schema);
return EINVAL;
}
symbol = json_string_value(json_symbol);
enum_rval =
avro_schema_enum_symbol_append(*schema,
symbol);
if (enum_rval != 0) {
avro_schema_decref(*schema);
return enum_rval;
}
}
}
break;
case AVRO_ARRAY:
{
int items_rval;
json_t *json_items = json_object_get(json, "items");
avro_schema_t items_schema;
if (!json_items) {
return EINVAL;
}
items_rval =
avro_schema_from_json_t(json_items, &items_schema,
error);
if (items_rval) {
return items_rval;
}
*schema = avro_schema_array(items_schema);
avro_schema_decref(items_schema);
}
break;
case AVRO_MAP:
{
int values_rval;
json_t *json_values = json_object_get(json, "values");
avro_schema_t values_schema;
if (!json_values) {
return EINVAL;
}
values_rval =
avro_schema_from_json_t(json_values, &values_schema,
error);
if (values_rval) {
return values_rval;
}
*schema = avro_schema_map(values_schema);
avro_schema_decref(values_schema);
}
break;
case AVRO_UNION:
{
unsigned int num_schemas = json_array_size(json);
avro_schema_t s;
if (num_schemas == 0) {
return EINVAL;
}
*schema = avro_schema_union();
for (i = 0; i < num_schemas; i++) {
int schema_rval;
json_t *schema_json = json_array_get(json, i);
if (!schema_json) {
return EINVAL;
}
schema_rval =
avro_schema_from_json_t(schema_json, &s,
error);
if (schema_rval != 0) {
avro_schema_decref(*schema);
return schema_rval;
}
schema_rval =
avro_schema_union_append(*schema, s);
avro_schema_decref(s);
if (schema_rval != 0) {
avro_schema_decref(*schema);
return schema_rval;
}
}
}
break;
case AVRO_FIXED:
{
json_t *json_size = json_object_get(json, "size");
json_t *json_name = json_object_get(json, "name");
int size;
const char *name;
if (!json_is_integer(json_size)) {
return EINVAL;
}
if (!json_is_string(json_name)) {
return EINVAL;
}
size = json_integer_value(json_size);
name = json_string_value(json_name);
*schema = avro_schema_fixed(name, size);
if (save_named_schemas(name, *schema, error)) {
return ENOMEM;
}
}
break;
default:
return EINVAL;
}
return 0;
}
int
avro_schema_from_json(const char *jsontext, const int32_t len,
avro_schema_t * schema, avro_schema_error_t * e)
{
json_t *root;
int rval = 0;
avro_schema_error_t error;
AVRO_UNUSED(len);
if (!jsontext || !schema) {
return EINVAL;
}
error = malloc(sizeof(struct avro_schema_error_t_));
if (!error) {
return ENOMEM;
}
*e = error;
error->named_schemas = st_init_strtable_with_size(DEFAULT_TABLE_SIZE);
if (!error->named_schemas) {
free(error);
return ENOMEM;
}
root = json_loads(jsontext, &error->json_error);
if (!root) {
st_free_table(error->named_schemas);
free(error);
return EINVAL;
}
/*
* json_dumpf(root, stderr, 0);
*/
rval = avro_schema_from_json_t(root, schema, e);
json_decref(root);
st_free_table(error->named_schemas);
if (rval == 0) {
/* no need for an error return */
free(error);
}
return rval;
}
avro_schema_t avro_schema_copy(avro_schema_t schema)
{
long i;
avro_schema_t new_schema = NULL;
if (!schema) {
return NULL;
}
switch (avro_typeof(schema)) {
case AVRO_STRING:
case AVRO_BYTES:
case AVRO_INT32:
case AVRO_INT64:
case AVRO_FLOAT:
case AVRO_DOUBLE:
case AVRO_BOOLEAN:
case AVRO_NULL:
/*
* No need to copy primitives since they're static
*/
new_schema = schema;
break;
case AVRO_RECORD:
{
struct avro_record_schema_t *record_schema =
avro_schema_to_record(schema);
new_schema =
avro_schema_record(record_schema->name,
record_schema->space);
for (i = 0; i < record_schema->fields->num_entries; i++) {
union {
st_data_t data;
struct avro_record_field_t *field;
} val;
st_lookup(record_schema->fields, i, &val.data);
avro_schema_t type_copy =
avro_schema_copy(val.field->type);
avro_schema_record_field_append(new_schema,
val.field->name,
type_copy);
}
}
break;
case AVRO_ENUM:
{
struct avro_enum_schema_t *enum_schema =
avro_schema_to_enum(schema);
new_schema = avro_schema_enum(enum_schema->name);
for (i = 0; i < enum_schema->symbols->num_entries; i++) {
union {
st_data_t data;
char *sym;
} val;
st_lookup(enum_schema->symbols, i, &val.data);
avro_schema_enum_symbol_append(new_schema,
val.sym);
}
}
break;
case AVRO_FIXED:
{
struct avro_fixed_schema_t *fixed_schema =
avro_schema_to_fixed(schema);
new_schema =
avro_schema_fixed(fixed_schema->name,
fixed_schema->size);
}
break;
case AVRO_MAP:
{
struct avro_map_schema_t *map_schema =
avro_schema_to_map(schema);
avro_schema_t values_copy =
avro_schema_copy(map_schema->values);
if (!values_copy) {
return NULL;
}
new_schema = avro_schema_map(values_copy);
}
break;
case AVRO_ARRAY:
{
struct avro_array_schema_t *array_schema =
avro_schema_to_array(schema);
avro_schema_t items_copy =
avro_schema_copy(array_schema->items);
if (!items_copy) {
return NULL;
}
new_schema = avro_schema_array(items_copy);
}
break;
case AVRO_UNION:
{
struct avro_union_schema_t *union_schema =
avro_schema_to_union(schema);
new_schema = avro_schema_union();
for (i = 0; i < union_schema->branches->num_entries;
i++) {
avro_schema_t schema_copy;
union {
st_data_t data;
avro_schema_t schema;
} val;
st_lookup(union_schema->branches, i, &val.data);
schema_copy = avro_schema_copy(val.schema);
if (avro_schema_union_append
(new_schema, schema_copy)) {
avro_schema_decref(new_schema);
return NULL;
}
}
}
break;
case AVRO_LINK:
{
struct avro_link_schema_t *link_schema =
avro_schema_to_link(schema);
/*
* TODO: use an avro_schema_copy of to instead of pointing to
* the same reference
*/
avro_schema_incref(link_schema->to);
new_schema = avro_schema_link(link_schema->to);
}
break;
default:
return NULL;
}
return new_schema;
}
const char *avro_schema_name(const avro_schema_t schema)
{
if (is_avro_record(schema)) {
return (avro_schema_to_record(schema))->name;
} else if (is_avro_enum(schema)) {
return (avro_schema_to_enum(schema))->name;
} else if (is_avro_fixed(schema)) {
return (avro_schema_to_fixed(schema))->name;
}
return NULL;
}
/* simple helper for writing strings */
static int avro_write_str(avro_writer_t out, const char *str)
{
return avro_write(out, (char *)str, strlen(str));
}
static int write_field(avro_writer_t out, struct avro_record_field_t *field)
{
int rval;
check(rval, avro_write_str(out, "{\"name\":\""));
check(rval, avro_write_str(out, field->name));
check(rval, avro_write_str(out, "\",\"type\":"));
check(rval, avro_schema_to_json(field->type, out));
return avro_write_str(out, "}");
}
static int write_record(avro_writer_t out, struct avro_record_schema_t *record)
{
int rval;
long i;
check(rval, avro_write_str(out, "{\"type\":\"record\",\"name\":\""));
check(rval, avro_write_str(out, record->name));
check(rval, avro_write_str(out, "\","));
if (record->space) {
check(rval, avro_write_str(out, "\"namespace\":\""));
check(rval, avro_write_str(out, record->space));
check(rval, avro_write_str(out, "\","));
}
check(rval, avro_write_str(out, "\"fields\":["));
for (i = 0; i < record->fields->num_entries; i++) {
union {
st_data_t data;
struct avro_record_field_t *field;
} val;
st_lookup(record->fields, i, &val.data);
if (i) {
check(rval, avro_write_str(out, ","));
}
check(rval, write_field(out, val.field));
}
return avro_write_str(out, "]}");
}