BSON 串行器/解串器

发布于 2024-09-24 05:29:34 字数 44 浏览 5 评论 0 原文

是否有适用于 PHP 或 Java 的 BSON 序列化器/反序列化器库？

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星軌x 2024-10-01 05:29:34

另一种可能性是 BSON4Jackson 扩展rel="nofollow">Jackson，增加了对 BSON 读/写的支持。

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云淡月浅 2024-10-01 05:29:34

Java 中的 BSON 编码器/解码器非常简单。以下代码片段来自我的应用程序，因此位于 Scala 中。我相信您可以轻松地从它构建 Java 实现。

import org.bson.BSON
import com.mongodb.{DBObject, DBDecoder, DefaultDBDecoder}

def convert(dbo: DBObject): Array[Byte] =
  BSON.encode(dbo)

// NB! this is a stateful object and thus it's not thread-safe, so have
// to create one per decoding
def decoder: DBDecoder = DefaultDBDecoder.FACTORY.create

def convert(data: Array[Byte]): DBObject =
  // NOTE: we do not support Ref in input, that's why "null" for DBCollection
  decoder.decode(data, null)

def convert(is: InputStream): DBObject =
  // NOTE: we do not support Ref in input, that's why "null" for DBCollection
  decoder.decode(is, null)

唯一值得注意的是，DBEncoder 实例有一个在解码期间（重新）使用的内部状态，因此它不是线程安全的。如果您逐一解码对象应该没问题，但否则您最好为每个解码会话创建一个实例。

BSON encoder/decoder in Java is pretty trivial. The following snippet of code is from my app, so it's in Scala. I am sure you could build a Java implementation from it easily.

import org.bson.BSON
import com.mongodb.{DBObject, DBDecoder, DefaultDBDecoder}

def convert(dbo: DBObject): Array[Byte] =
  BSON.encode(dbo)

// NB! this is a stateful object and thus it's not thread-safe, so have
// to create one per decoding
def decoder: DBDecoder = DefaultDBDecoder.FACTORY.create

def convert(data: Array[Byte]): DBObject =
  // NOTE: we do not support Ref in input, that's why "null" for DBCollection
  decoder.decode(data, null)

def convert(is: InputStream): DBObject =
  // NOTE: we do not support Ref in input, that's why "null" for DBCollection
  decoder.decode(is, null)

The only significant note is that DBEncoder instance has an internal state it (re)uses during decoding, so it's not thread-safe. It should be ok if you decode objects one by one, but otherwise you'd better create an instance per decoding session.

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