Fix qdrant vector store value factory (#3173)

- Fix the QdrantValueFactory to handle "java.util.List" type
 - Update the integration test to use List type values

Resolves #3164

Signed-off-by: Ilayaperumal Gopinathan <ilayaperumal.gopinathan@broadcom.com>

Author: ilayaperumalg

vector-stores/spring-ai-qdrant-store/src/main/java/org/springframework/ai/vectorstore/qdrant/QdrantValueFactory.java

@@ -32,6 +32,7 @@
  * Utility methods for building io.qdrant.client.grpc.JsonWithInt.Value from Java objects.
  *
  * @author Anush Shetty
+ * @author Ilayaperumal Gopinathan
  * @since 0.8.1
  */
 final class QdrantValueFactory {
@@ -65,6 +66,10 @@ private static Value value(Object value) {
 			return value((Map<String, Object>) value);
 		}
 
+		if (value instanceof List) {
+			return value((List<Object>) value);
+		}
+
 		switch (value.getClass().getSimpleName()) {
 			case "String":
 				return ValueFactory.value((String) value);
@@ -81,6 +86,16 @@ private static Value value(Object value) {
 		}
 	}
 
+	private static Value value(List<Object> elements) {
+		List<Value> values = new ArrayList<Value>(elements.size());
+
+		for (Object element : elements) {
+			values.add(value(element));
+		}
+
+		return ValueFactory.list(values);
+	}
+
 	private static Value value(Object[] elements) {
 		List<Value> values = new ArrayList<Value>(elements.length);
 

vector-stores/spring-ai-qdrant-store/src/test/java/org/springframework/ai/vectorstore/qdrant/QdrantVectorStoreIT.java

@@ -79,10 +79,11 @@ public class QdrantVectorStoreIT extends BaseVectorStoreTests {
 	List<Document> documents = List.of(
 			new Document("Spring AI rocks!! Spring AI rocks!! Spring AI rocks!! Spring AI rocks!! Spring AI rocks!!",
 					Collections.singletonMap("meta1", "meta1")),
-			new Document("Hello World Hello World Hello World Hello World Hello World Hello World Hello World"),
+			new Document("Hello World Hello World Hello World Hello World Hello World Hello World Hello World",
+					Collections.singletonMap("meta1", List.of("meta-list"))),
 			new Document(
 					"Great Depression Great Depression Great Depression Great Depression Great Depression Great Depression",
-					Collections.singletonMap("meta2", "meta2")));
+					Collections.singletonMap("meta2", List.of("meta-list"))));
 
 	@BeforeAll
 	static void setup() throws InterruptedException, ExecutionException {