GH-2488 - Use default database selection.

Fixes #2488.

Author: michael-simons

src/main/java/org/springframework/data/neo4j/core/Neo4jTemplate.java

@@ -129,7 +129,7 @@ public Neo4jTemplate(Neo4jClient neo4jClient, Neo4jMappingContext neo4jMappingCo
 
 		this(neo4jClient, neo4jMappingContext, EntityCallbacks.create());
 
-		if (databaseSelectionProvider != neo4jClient.getDatabaseSelectionProvider()) {
+		if (!Objects.equals(databaseSelectionProvider, neo4jClient.getDatabaseSelectionProvider())) {
 			throw new IllegalStateException(
 					"The provided database selection provider differs from the Neo4jClient's one.");
 		}
@@ -141,7 +141,7 @@ public Neo4jTemplate(Neo4jClient neo4jClient, Neo4jMappingContext neo4jMappingCo
 
 		this(neo4jClient, neo4jMappingContext, entityCallbacks);
 
-		if (databaseSelectionProvider != neo4jClient.getDatabaseSelectionProvider()) {
+		if (!Objects.equals(databaseSelectionProvider, neo4jClient.getDatabaseSelectionProvider())) {
 			throw new IllegalStateException(
 					"The provided database selection provider differs from the Neo4jClient's one.");
 		}

src/main/java/org/springframework/data/neo4j/core/ReactiveNeo4jTemplate.java

@@ -36,6 +36,7 @@
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicReference;
@@ -131,7 +132,7 @@ public ReactiveNeo4jTemplate(ReactiveNeo4jClient neo4jClient, Neo4jMappingContex
 								 ReactiveDatabaseSelectionProvider databaseSelectionProvider) {
 
 		this(neo4jClient, neo4jMappingContext);
-		if (databaseSelectionProvider != neo4jClient.getDatabaseSelectionProvider()) {
+		if (!Objects.equals(databaseSelectionProvider, neo4jClient.getDatabaseSelectionProvider())) {
 			throw new IllegalStateException("The provided database selection provider differs from the ReactiveNeo4jClient's one.");
 		}
 	}