Spring/spring-data-mongodb
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DATAMONGO-1831 - Fix array type conversion for empty source.

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We now make sure that we convert empty sources to the corresponding target type. This prevents entity instantiation from failing due to incorrect argument types when invoking the constructor.

Original pull request: #520.
This commit is contained in:
Christoph Strobl
2017-12-01 10:40:15 +01:00
committed by Mark Paluch
parent 1bb4324b2e
commit f86447bd04
2 changed files with 26 additions and 1 deletions
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2
spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MappingMongoConverter.java
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@@ -954,7 +954,7 @@ public class MappingMongoConverter extends AbstractMongoConverter implements App
: CollectionFactory.createCollection(collectionType, rawComponentType, sourceValue.size());
if (sourceValue.isEmpty()) {
return getPotentiallyConvertedSimpleRead(items, collectionType);
return getPotentiallyConvertedSimpleRead(items, targetType.getType());
}
if (!DBRef.class.equals(rawComponentType) && isCollectionOfDbRefWhereBulkFetchIsPossible(sourceValue)) {

25
spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/MappingMongoConverterUnitTests.java
View File

@@ -21,6 +21,8 @@ import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import static org.springframework.data.mongodb.core.DocumentTestUtils.*;
import lombok.RequiredArgsConstructor;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URL;
@@ -1803,6 +1805,22 @@ public class MappingMongoConverterUnitTests {
converter.read(TypeWithMapOfLongValues.class, source);
}
@Test // DATAMONGO-1831
public void shouldConvertArrayInConstructorCorrectly() {
org.bson.Document source = new org.bson.Document("array", Collections.emptyList());
assertThat(converter.read(WithArrayInConstructor.class, source).array, is(emptyArray()));
}
@Test // DATAMONGO-1831
public void shouldConvertNullForArrayInConstructorCorrectly() {
org.bson.Document source = new org.bson.Document();
assertThat(converter.read(WithArrayInConstructor.class, source).array, is(nullValue()));
}
static class GenericType<T> {
T content;
}
@@ -2157,4 +2175,11 @@ public class MappingMongoConverterUnitTests {
static class TypeWithMapOfLongValues {
Map<String, Long> map;
}
@RequiredArgsConstructor
static class WithArrayInConstructor {
final String[] array;
}
}