How Can I Dynamically Create a Typed ArrayList in Gson Using Reflection?

Implementing Dynamic Type ArrayList Using Gson TypeToken and Reflection

In this inquiry, the goal is to create a dynamically typed ArrayList using Gson, where the datatype is determined at runtime using Java reflection.

The initial approach involved using a TypeToken to specify the desired type of the ArrayList. However, it resulted in a runtime error.

To resolve this issue, the revised solution leverages the new TypeToken method getParameterized(Type rawType, Type... typeArguments) introduced in Gson 2.8.0. This method allows you to create a TypeToken for a specific parameterized type.

The updated code:

private <T> Type setModelAndGetCorrespondingList2(Class<T> type) {
    return TypeToken.getParameterized(ArrayList.class, type).getType();
}

With this revised solution, you can dynamically create a TypeToken for the desired ArrayList type at runtime using Java reflection and retrieve the corresponding Type through the getType() method.

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