正则表达式完全匹配字符串

Question

I have below string which I split using regex and get id,id,roduct_clinical_studies__rimr,product__rim,product__v in an array. This works for most of the cases. But for below string since clinical contains IN it fails.How can I do an exact match of IN/SELECT etc

 id IN (SELECT id FROM  product_clinical_studies__rimr  WHERE product__rim CONTAINS {{this.product__v}})


String[] parseString(String filterInString) {
    return filterInString.replaceAll("(?i)CONTAINS|IN|SELECT|FROM|WHERE|(this\\.)|[(){}=,]|(\\s{2,})", " ").
            replaceAll("\\s+", " ").split("\\s");
}

Answer 1

If you can't identify by whitespace, then run this as two passes. First pass with all unique objects, second pass for just "IN".

Answer 2

You could either get rid of the (?i) or add a word boundary around
the literals

(?i)\\b(?:CONTAINS|IN|SELECT|FROM|WHERE)\\b|(this\\.)|[(){}=,]|‌​(\\s{2,})

If you need to match keyword/keyword/../.. runs , this probably works
as well

(?i)\\b(?:CONTAINS|IN|SELECT|FROM|WHERE)(?:/(?:CONTAINS|IN|SE‌​LECT|FROM|WHERE))*\\b‌​|(this\\.)|[(){}=,]|(‌​\\s{2,})

Expanded

    (?i)
    \b 
    (?:
         CONTAINS
      |  IN
      |  SELECT
      |  FROM
      |  WHERE
    )
    (?:
         /
         (?:
              CONTAINS
           |  IN
           |  SELECT
           |  FROM
           |  WHERE
         )
    )*
    \b 
 |  ( this\. )                    # (1)
 |  [(){}=,] 
 |  ( \s{2,} )                    # (2)