[SalesForce] Deserialize JSON Root Array

I'm having so trouble deserializing a JSON stream that contains an array as the root:

[
    {
        "object": {
                     "property1":"000000",
                     "property2":"000000"
                  }
    },
    {
        "object": {
                     "property1":"000000",
                     "property2":"000000"
                  }
    }
]

I tried using JSON.deserializeUntyped and assigning to a Map, but I keep getting a "invalid conversion runtime type LIST to MAP". This method worked fine when I was dealing with single JSON objects, but loading multiples into an array trips this error. Should I be using a different type for deserialization?

Best Answer

You have to cast it into a List<Object>, and for each element in the list, you can access the values as a Map<Object,Object>.

Related Solutions

[SalesForce] How to store and JSON-serialize Map of Objects AND SObjects

Try adding this instead of your last line of code:

String jsonstr = (String)JSON.serialize(parameters.get('SObject'));
SObject restoredAcme = (Account)JSON.deserialize(jsonstr, Account.class);

The problem with what you're currently trying to do is that you're essentially trying to cast a Map to an Account - which as you've seen, you cannot do.

As a workaround, you can serialize the Map to String and then deserialize that String to an Account.

[SalesForce] JSON.deserializeUntyped() not parsing the whole JSON

You can make the code work with an extra step:

String s = '{"totalResults": 2, "startIndex":0, "pricing":[{"price":10.80,"cost":9.22,"gp":12},{"price":5.50,"cost":4.00,"gp":24}]}';
Map<String, Object> m = (Map<String, Object>) JSON.deserializeUntyped(s);
List<Object> pricing = (List<Object>) m.get('pricing');
for (Object o : pricing) {
    Map<String, Object> p = (Map<String, Object>) o;
    System.debug('>>> ' + p);
}

Best Answer

Related Solutions

[SalesForce] How to store and JSON-serialize Map of Objects AND SObjects

[SalesForce] JSON.deserializeUntyped() not parsing the whole JSON

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