java - Java 中 MetaMap 的正则表达式

Question

MetaMap 文件具有以下行:

mappings([map(-1000,[ev(-1000,'C0018017','Objective','Goals',[objective],[inpr],[[[1,1],[1,1],0]],yes,no)])]).

格式解释为

mappings(
      [map(negated overall score for this mapping, 
            [ev(negated candidate score,'UMLS concept ID','UMLS concept','preferred name for concept - may or may not be different',
                 [matched word or words lowercased that this candidate matches in the phrase - comma separated list],
                 [semantic type(s) - comma separated list],
                 [match map list - see below],candidate involved with head of phrase - yes or no,
                 is this an overmatch - yes or no
               )
            ]
          )
      ]
    ).

我想在 java 中运行 RegEx 查询，它为我提供字符串“UMLS 概念 ID”、语义类型和匹配映射列表。RegEx 是正确的工具吗？或者在 Java 中实现此目的最有效的方法是什么？

Answer 1

这是我对正则表达式解决方案的尝试。我正在尝试这种replace“元正则表达式”方法；我希望它能读取出更具可读性的代码。

String line = "mappings([map(-1000,[ev(-1000,'C0018017','Objective','Goals',[objective],[inpr],[[[1,1],[1,1],0]],yes,no)])]).";
String regex = 
    "mappings([map(number,[ev(number,<quoted>,quoted,quoted,[csv],[<csv>],[<matchmap>],yesno,yesno)])])."
    .replaceAll("([\\.\\(\\)\\[\\]])", "\\\\$1") // escape metacharacters
    .replace("<", "(").replace(">", ")") // set up capture groups
    .replace("number", "-?\\d+")
    .replace("quoted", "'[^']*'")
    .replace("yesno", "(?:yes|no)")
    .replace("csv", "[^\\]]*")
    .replace("matchmap", ".*?")
;
System.out.println(regex);
// prints "mappings\(\[map\(-?\d+,\[ev\(-?\d+,('[^']*'),'[^']*','[^']*',\[[^\]]*\],\[([^\]]*)\],\[(.*?)\],(?:yes|no),(?:yes|no)\)\]\)\]\)\."

Matcher m = Pattern.compile(regex).matcher(line);
if (m.find()) {
    System.out.println(m.group(1)); // prints "'C0018017'"
    System.out.println(m.group(2)); // prints "inpr"
    System.out.println(m.group(3)); // prints "[[1,1],[1,1],0]"
}

此replace元正则表达式允许您通过设置适当的replace轻松地容纳符号之间的空格(而不是将其全部散布成一团难以阅读的困惑)。