Complete Vavr collection detection on TypeInformation and CustomConversions.

Moved Vavr collection converters into a type in the utility package. Register the converters via CustomConversions.registerConvertersIn(…) to make sure that all the Spring Data object mapping converters automatically benefit from a ConversionService that is capable of translating between Java-native collections and Vavr ones.

Issue #2511.

src/test/java/org/springframework/data/convert/CustomConversionsUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011-2021 the original author or authors.
+ * Copyright 2011-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@ import static org.mockito.Mockito.*;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Date;
+import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.function.Predicate;
@@ -30,7 +31,6 @@ import org.jmolecules.ddd.types.Association;
 import org.jmolecules.ddd.types.Identifier;
 import org.joda.time.DateTime;
 import org.junit.jupiter.api.Test;
-
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConverterFactory;
@@ -46,7 +46,6 @@ import org.springframework.data.convert.Jsr310Converters.LocalDateTimeToDateConv
 import org.springframework.data.convert.ThreeTenBackPortConverters.LocalDateTimeToJavaTimeInstantConverter;
 import org.springframework.data.geo.Point;
 import org.springframework.data.mapping.model.SimpleTypeHolder;
-
 import org.threeten.bp.LocalDateTime;
 
 /**
@@ -292,6 +291,18 @@ class CustomConversionsUnitTests {
 		assertThat(conversions.hasCustomReadTarget(String.class, Identifier.class)).isTrue();
 	}
 
+	@Test // GH-2511
+	void registersVavrConverters() {
+
+		ConfigurableConversionService conversionService = new DefaultConversionService();
+
+		new CustomConversions(StoreConversions.NONE, Collections.emptyList())
+				.registerConvertersIn(conversionService);
+
+		assertThat(conversionService.canConvert(io.vavr.collection.List.class, List.class)).isTrue();
+		assertThat(conversionService.canConvert(List.class, io.vavr.collection.List.class)).isTrue();
+	}
+
 	private static Class<?> createProxyTypeFor(Class<?> type) {
 
 		ProxyFactory factory = new ProxyFactory();