How to check a given json-path expression is syntactically correct?

Question

I need to validate whether the below json-paths are syntactically correct or not:

$[*].key1.key2[*].key3.key4 // valid
$[*].key1/key2[*].key3"key4 // invalid

Is there any API which can check the above json-path expressions and return true/false in Java ?

Answer 1

Try importing Jayway JsonPath https://github.com/json-path/JsonPath then JsonPath.read("{}", yourJsonPath); and if it doesn't explode the path is valid.

Answer 2

Use a JSON parser like JSON.parse:

function IsJsonString(str) 
  {
      try 
      {
        JSON.parse(str);
      }
      catch (e) 
      {
        return false;
      }
    return true;
  }