Java Pattern matching group value containing parantheses

Question

I am trying to group a string expression into three parts using Regex. It works for most cases and getting stuck for one case.

Regex

([\\w.]+?)(:|<|>|<=|>=|%|-|\\(\\))([\\w\\s,.:-]+?)\\|

Code:

private SearchCriteria validateFilterPattern(String filter) {
        final Pattern pattern = Pattern.compile("([\\w.]+?)(:|<|>|<=|>=|%|-|\\(\\))([\\w\\s,.:-]+?)\\|");
        Matcher m = pattern.matcher(filter + "|");
        if (m.find()) {
            return SearchCriteria.builder().key(m.group(1)).operator(m.group(2)).value(m.group(3)).build();
        } else {
            throw new RuntimeException(ErrorMessage.FILTER_FORMAT_INVALID, filter);
        }
    }

Input is having pattern key:value. The above code is using the regex and grouping the input expression into three parts: key,operator and value. Operators can be: , >, <, >=, <=, *, ~, (), % Keys can be any word, value can contain word, letters, dots, colon,some special characters and brackets.

I am able to match following and group it into three parts.

regulatory:Section 740.17 Mass Market
regulatory:Section 740.17

The above two inputs segregate into groups like

key {regulatory} , operator {:} , value {Section 740.17 Mass Market}
key {regulatory} , operator {:} , value {Section 740.17}

But not able to group it for inputs where value contains brackets.

regulatory:Section 740.17(b)(1) Mass Market
regulatory()Section 740.17(b)(1) Mass Market

The above should segregate into groups like

key {regulatory} , operator {:} , value {Section 740.17(b)(1) Mass Market}
key {regulatory} , operator {()} , value {Section 740.17(b)(1) Mass Market}

Answer 1

Able to solve it by using below regex

"([\\w.]+?)(:|<|>|<=|>=|%|-|\\(\\))([\\w\\s,.:\\(\\)-]+?)\\|"