[SalesForce] How to deserialize json properties that are reserved words in apex

Is there any way to deserialize JSON into an object using JSON.deserialize if some of the property names in the JSON are reserved words in apex? I want to do something like this:

string jsonString = '{"currency" : "ABC"}';
public class JSONResult
{
    public string currency;
}
JSONResult res = (JSONResult) JSON.deserialize(jsonString, JSONResult.class);
system.debug(res);

but of course I get an error that the identifier name is reserved.

Best Answer

There are 2 ways that you could solve this problem, neither of them is exactly what you're looking for, but I think it's the best apex offers.

Perform a string replace on the json string, the implications of this is unintended replacement of valid text inside a string, but this could be mitigated if the form of the json is as you've supplied "currency": "ABC" you could string replace:

jsonString.replace('"currency":', '"currency_x":');
The other is a lot more painful, it would require you to parse the json yourself using the JSON Parser methods. This will be a lot more accurate, but if the definition of the json changes you will have to rewrite your solution

Related Solutions

[SalesForce] APEX ENUM Serialize to and Deserialize from JSON

Declare your member transient and the JSON serializer will ignore it. A quick validation in an anonymous block (yes, you can declare classes inside anonymous blocks!)

public enum Obscurity{ OBVIOUS, OPAQUE, WTF }
public class Thing{
    public Obscurity obscurityLevel;
    public transient Obscurity notSerialized;
}

Thing t = new Thing();
t.obscurityLevel = Obscurity.OBVIOUS;
t.notSerialized = Obscurity.OPAQUE;

System.debug(LoggingLevel.Error,JSON.serialize(t));

The debug log generated will be along the lines of:

11:24:33.092 (92520000)|USER_DEBUG|[11]|ERROR|{"obscurityLevel":{}}

Note that this will also prevent the enum from being kept in viewstate, and I believe also has some impact on Database.Batchable's state.

Another option is to coerce your object into a Map, which can be done with the builtin JSON methods, and then mutate the Map before re-serializing it with the desired state. This can be used to handle the bulk of the object via the standard JSON methods, but then specially handle the enum. I've found this much easier than using the JSONGenerator and JSONParser classes.

[SalesForce] How to deserialize JSON to a class where the same variable name has different data types

So I decided the easiest way is to do a find and replace on the JSON string and change the names of one of the duplicate variables.

String s2 = geoJSON.replace('"coordinates":[[[', '"polygonCoordinates":[[[');

Then I updated my classes to look like this

public class geometryCollection
{
   String type;   
   List<geometry> geometries; 
}

public class geometry
{
   String type;
   List<Decimal> coordinates;
   List<List<List<Decimal>>> polygonCoordinates;
}

Then once I have serialized the JOSN I can change it back.

Best Answer

Related Solutions

[SalesForce] APEX ENUM Serialize to and Deserialize from JSON

[SalesForce] How to deserialize JSON to a class where the same variable name has different data types

Related Topic