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From anandsubbu <...@git.apache.org>
Subject [GitHub] metron pull request #727: METRON-1146: Add ability to parse JSON string into...
Date Tue, 12 Sep 2017 14:22:47 GMT
Github user anandsubbu commented on a diff in the pull request:

    https://github.com/apache/metron/pull/727#discussion_r138362754
  
    --- Diff: metron-stellar/stellar-common/src/main/java/org/apache/metron/stellar/dsl/functions/StringFunctions.java
---
    @@ -550,4 +548,90 @@ else if(var.length() == 0) {
           return new ParseException("Unable to parse JSON string");
         }
       }
    +
    +  @Stellar(name = "JSON_TO_MAP"
    +          , description = "Returns a MAP object for the specified JSON string"
    +          , params = {
    +          "str - the JSON String to convert, may be null"
    +  }
    +          , returns = "a MAP object containing the parsed JSON string"
    +  )
    +  public static class JsonToMap extends BaseStellarFunction {
    +
    +    @Override
    +    public Object apply(List<Object> strings) {
    +
    +      if (strings == null || strings.size() == 0) {
    +        throw new IllegalArgumentException("[JSON_TO_MAP] incorrect arguments. Usage:
JSON_TO_MAP <JSON String>");
    +      }
    --- End diff --
    
    Added check.


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