Corda-NULL_PARTY的目的 [英] Corda - Purpose of NULL_PARTY

问题描述

NullKeys.NULL_PARTY 的目的是什么?

例如，我什么时候应该使用

For example, when should I use

party: AbstractParty = NullKeys.NULL_PATRY

而不是

party: AbstractParty? = null

推荐答案

party: AbstractParty? = null

上面定义了一个可为空的变量，即party将是 AbstractParty 或它将是 null

The above defines a nullable variable i.e. party will either be an AbstractParty or it will be null

party: AbstractParty = NullKeys.NULL_PARTY

另一方面，以上内容永远不会导致聚会为 null ，但是最终您会得到一个 AnonymousParty 和一个 null code>公钥.

The above on the other hand, will never result in party being null, but rather you'll end up with an AnonymousParty with a null public key.

NULL_PARTY 在单元测试期间可能会很有用，特别是在进行相等性测试时，但不建议将其用于生产代码.

NULL_PARTY could come in useful during unit testing, particularly when testing for equality, but it's not advised to use it for production code.

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