番石榴：Splitter并考虑逃离？ [英] Guava: Splitter and considering Escaping?

问题描述

我对番石榴的分裂可能性感兴趣：

I am interested in the Splitting possibility of Guava:

Splitter.on("|").split("foo|bar|baz");
// => "foo", "bar", "baz"

这是正常的。

如果我想拆分|现在怎么办？但不在[和]之间：

What now if I want to split on "|" but not between "[" and "]":

Splitter.on(something).split("foo|ba[r|ba]z");
// => "foo", "ba[r|ba]z"

根据我的理解，它不是可以在番石榴中定义这个东西。

From what I understood, it is not possible to define this "something" in Guava.

我发现了这个：
问题799：将谷歌转义库添加到番石榴。这是否相关？

I found this: Issue 799: Add google escape library to Guava. Is this related ?

推荐答案

处理此问题的正确方法是创建解析器。现在真的很简单，只需使用解析器组合器，例如JParsec。你会得到这样的结果：

The proper way to deal with this is to make a parser. It's really easy nowadays, just use a parser combinator, such as JParsec. You'll get something like this:

class ParserFactory {

    Parser escapedSequence() {
        return Parsers.between(Scanners.string("["), 
            Scanners.anyCharacterButNot("]"), Scanners.string("]"));
    }

    Parser chunk() {
        return Parsers.or(escapedSequence(), Scanners.anyCharacterButNot("|"));
    }

    Parsers wholeThing() {
        return Parsers.separatedBy(chunk().plus(), Scanners.string("|"));
    }
}

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