LeMikaelF

Title: Allow collections with multiple types in Configuration Properties

Motivation

It's not uncommon for libraries or applications that accept configuration properties to need to extend their model. For example, here is a configuration for zalando/logbook, where the logbook.obfuscate.headers property is a list of strings, and is mapped to a List<String> in a @ConfigurationProperties-annotated class:

LeMikaelF

package org.example.springbarebones21;

import java.lang.reflect.Method;

import org.springframework.cglib.core.ReflectUtils;
import org.springframework.cglib.core.Signature;
import org.springframework.cglib.proxy.Callback;
import org.springframework.cglib.proxy.Factory;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;

LeMikaelF

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;

@ExtendWith(MockitoExtension.class)