JsonValueProcessor

[wbrian]

Hi there,

my situation is that of converting a json string into a bean. using JSONOjbect.toBean(jsonString, myBean.class) works well;

however, one when the json object is stringified one of the fields is set as a Json array.

I'd like to convert that array into a string during the conversion from json string into java bean coz the corresponding bean field is a string.

I thought that something like the following might work (this does compile):

JsonConfig jsonConfig = new JsonConfig();
jsonConfig.registerJsonValueProcessor("myJsonArrayKey", new JsonArrayValueProcessor());
JSONObject jsonObject = JSONObject.fromObject(myJsonString, jsonConfig);
MyBean c = (MyBean)JSONObject.toBean(jsonObject, MyBean.class);

JsonArrayValueProcessor() implements JsonValueProcessor and is supposed to be the class that converts the array key into a string key; the result of the conversion is held in the intermediary object jsonObject.

is this approach correct?
and, how do I implement the two methods of JsonValueProcessor and their parameters?

any assistance that you might be able to provide would be greatly appreciated.

thank you,
Brian

[aalmiray]

Hi Brian,
Your assumptions are correct, the code will work provided that you implement processObjectValue(String key, Object value, JsonConfig jsonConfig) with your custom logic. That is the method used to transform a value in an object context, the other is used when in an array context. The way you are registering the JsonValueProcessor will work for any bean that has a property named 'myJsonArrayKey', you may however be more restrictive and register it with

registerJsonValueProcessor(MyBean.class, "myJsonArrayKey", new JsonArrayValueProcessor());

Cheers,
Andres