DATAMONGO-2210 - Add support to persist URI instances out of the box.

We now register Converter implementations that persist a URI as String by default to avoid the reflection inspection of URI instances.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MongoConverters.java

@@ -15,9 +15,12 @@
  */
 package org.springframework.data.mongodb.core.convert;
 
+import static org.springframework.data.convert.ConverterBuilder.*;
+
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.net.MalformedURLException;
+import java.net.URI;
 import java.net.URL;
 import java.time.Instant;
 import java.util.ArrayList;
@@ -90,6 +93,8 @@ abstract class MongoConverters {
 		converters.add(BinaryToByteArrayConverter.INSTANCE);
 		converters.add(BsonTimestampToInstantConverter.INSTANCE);
 
+		converters.add(reading(String.class, URI.class, URI::create).andWriting(URI::toString));
+
 		return converters;
 	}
 

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/MongoConvertersUnitTests.java

@@ -18,6 +18,7 @@ package org.springframework.data.mongodb.core.convert;
 import static org.assertj.core.api.Assertions.*;
 
 import java.math.BigDecimal;
+import java.net.URI;
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
 import java.util.Currency;
@@ -28,6 +29,8 @@ import org.assertj.core.data.TemporalUnitLessThanOffset;
 import org.bson.BsonTimestamp;
 import org.bson.Document;
 import org.junit.Test;
+import org.springframework.core.convert.support.ConfigurableConversionService;
+import org.springframework.core.convert.support.DefaultConversionService;
 import org.springframework.data.geo.Box;
 import org.springframework.data.geo.Circle;
 import org.springframework.data.geo.Point;
@@ -156,4 +159,17 @@ public class MongoConvertersUnitTests {
 				.isCloseTo(Instant.ofEpochSecond(1540384327), new TemporalUnitLessThanOffset(100, ChronoUnit.MILLIS));
 	}
 
+	@Test // DATAMONGO-2210
+	public void convertsUrisToString() {
+
+		MongoCustomConversions conversions = new MongoCustomConversions();
+
+		assertThat(conversions.getSimpleTypeHolder().isSimpleType(URI.class)).isTrue();
+
+		ConfigurableConversionService conversionService = new DefaultConversionService();
+		conversions.registerConvertersIn(conversionService);
+
+		assertThat(conversionService.convert(URI.create("/segment"), String.class)).isEqualTo("/segment");
+		assertThat(conversionService.convert("/segment", URI.class)).isEqualTo(URI.create("/segment"));
+	}
 }