This project uses the JSON Path expression parsing logic mentioned in Stefan Goessner's article. I make use of parts of the code from original JSON path implementation in JS found here.

class Example {
    public static void main(String[] args) {
        JsonPathValidator validator = new BasicJsonPathValidator();
        Assert.assertTrue(validator.validate("$.as[?(@.name == 'samba')]"));
        Assert.assertFalse(validator.validate("a['??kangaroo   \"A\"'][??(@.name == 'a')].value"));        
    } 
}

JsonPathValidator is an interface that has a basic implementation BasicJsonPathValidator. If required other sophisticated validators can be added to this library.

Note: This library doesn't really evaluate the path against a JSON object, this is strictly pre-evaluation phase syntax check.

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[1] https://goessner.net/articles/JsonPath/

[2] https://code.google.com/archive/p/jsonpath/