JsonStringToMap cannot handle JsonArrays

[aksbhatia]

Error:
Caused by: java.lang.ClassCastException: org.json.simple.JSONArray cannot be cast to org.json.simple.JSONObject
at com.twitter.elephantbird.pig.piggybank.JsonStringToMap.parseStringToMap(JsonStringToMap.java:63)
at com.twitter.elephantbird.pig.piggybank.JsonStringToMap.exec(JsonStringToMap.java:53)

Possible Reason:
protected Map<String, String> parseStringToMap(String line) {
try {
Map<String, String> values = Maps.newHashMap();
_JSONObject jsonObj = (JSONObject) jsonParser.parse(line);_

i.e. Since it is trying to cast JSONArray to JSONObject, it fails.

Eg. Input:
[{"discountLevel":"SUBTOTAL","itemIDs":["2523445"]},{"discountLevel":"SUBTOTAL","itemIDs":["1119882"]}]

My Pig Script:
a = FOREACH applied GENERATE JsonStringToMap(input);

Some googling led me here : https://groups.google.com/forum/#!topic/elephantbird-dev/mxCcAh4WEXY
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