Java Reflection Generic Return Type getGenericType(Type returnType, int index)

Description

get Generic Type

License

Open Source License

Declaration

public static Class getGenericType(Type returnType, int index) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.lang.reflect.*;

public class Main {
    public static Class getGenericType(Type returnType, int index) {
        if (returnType instanceof ParameterizedType) {
            ParameterizedType type = (ParameterizedType) returnType;
            Type[] typeArguments = type.getActualTypeArguments();
            if (index >= typeArguments.length || index < 0) {
                throw new RuntimeException("invalid index : " + index);
            }/*  www.  j ava  2 s.c  o m*/
            return (Class) typeArguments[index];
        }
        return (Class) returnType;
    }
}

Related

1. getGenericReturnClass(Method method)
2. getGenericReturnType(Method m)
3. getGenericReturnTypeMap(Method method, boolean isAllowNull)
4. getGenericReturnTypeOfGenericInterfaceMethod( Class clazz, Method method)
5. getGenericReturnTypeOfGenericInterfaceMethod(Class clazz, Method method)