[英]Parse JSON without knowing format (can be one of two different objects)
I have two concrete objects with a known schema (totally different). 我有两个具有已知架构的具体对象(完全不同)。 Then I get JSON from a client and want to map it into one of this object.
然后,我从客户端获取JSON,并希望将其映射到该对象之一。
Is it possible to somehow check type before conversion, or I have to try to convert it into each of object and check if parsing was correct? 是否可以在转换之前以某种方式检查类型,或者我必须尝试将其转换为每个对象并检查解析是否正确?
EDIT: In example: 编辑:例如:
{"id":"1","name":"oneone"}
and second 第二
{"age":50,"type":"elephant"}
Personally, I would parse the JSON using GSON or something similar and look for the key that is unique to one of the JSON formats, for instance "age". 就个人而言,我将使用GSON或类似方法解析JSON,然后寻找一种JSON格式所独有的密钥,例如“年龄”。 In reality, you could probably do this as a String as @user743414 mentioned as well.
实际上,您也可以像@ user743414一样将其作为String进行。
UPDATE: 更新:
Here is some code to reflect what I'm talking about 这是一些代码来反映我在说什么
JsonParser jsonParser = new JsonParser();
JsonObject jsonObject = jsonParser.parse(jsonString).getAsJsonObject();
Set<String> keys = jsonObject.keySet();
if(keys.contains("age")){
//Map to one object
} else {
//Map to the other object
}
If you are sure schema is constant for both JSON's, then simply take a unique parameter like age in this example and check if it exists in the JSON. 如果确定两个JSON的模式都是恒定的,则只需在此示例中使用一个唯一的参数(例如age),然后检查它是否存在于JSON中。
If (String.contains(“age”)) {
//then it’s 2nd JSON
} else {
//then it’s 1st JSON
}
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