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[avro-c] 关于 schema

2011-02-16 11:57:42| 分类： serialize_avro | 标签： |举报 |字号大中小订阅

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avro_obj_t (avro_schema_t)

|

avro_xxx_schema_t

sturct avro_obj_t {}

struct avro_xxx_schema_t {

struct avro_obj_t obj;

...

};

通过这样来实现'多态'。

支持如下的 field type：

string

bytes

int32

int64

float

double

boolean

null

record, structure

enum

fixed, 固定大小的string

map

array

union

link

// 从 jsontext 中，创建 schema。不支持直接从文件中读 jsontext，这个要自己写代码支持。

int avro_schema_from_json(const char *jsontext, const int32_t len, avro_schema_t * schema, avro_schema_error_t * e)

// 从 schema 生成 json，写入 out 中。out 可能是 file or memory。

int avro_schema_to_json(avro_schema_t schema, avro_writer_t out)

// 对比两个 schema 是否相同

int avro_schema_equal(avro_schema_t a, avro_schema_t b)

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