Use Integer return type for Number return types except Double and Float.

Lettuce's ValueOutput doesn't RESP 3 long values so we must use IntegerOutput instead.

Closes #3090

Author: mp911de

src/main/java/org/springframework/data/redis/connection/ReturnType.java

@@ -73,7 +73,11 @@ public static ReturnType fromJavaType(@Nullable Class<?> javaType) {
 			return ReturnType.BOOLEAN;
 		}
 
-		if (ClassUtils.isAssignable(Long.class, javaType)) {
+		if (ClassUtils.isAssignable(Double.class, javaType) || ClassUtils.isAssignable(Float.class, javaType)) {
+			return ReturnType.VALUE;
+		}
+
+		if (ClassUtils.isAssignable(Number.class, javaType)) {
 			return ReturnType.INTEGER;
 		}
 

src/test/java/org/springframework/data/redis/connection/ReturnTypeUnitTests.java

@@ -34,8 +34,19 @@ class ReturnTypeUnitTests {
 	@ParameterizedTest // DATAREDIS-1245
 	@ValueSource(classes = { List.class, ArrayList.class, LinkedList.class })
 	void shouldConsiderListsAsMultiType(Class<?> listClass) {
-
 		assertThat(ReturnType.fromJavaType(listClass)).isEqualTo(ReturnType.MULTI);
 	}
 
+	@ParameterizedTest // GH-3090
+	@ValueSource(classes = { Integer.class, Long.class, Number.class })
+	void shouldConsiderIntegerType(Class<?> listClass) {
+		assertThat(ReturnType.fromJavaType(listClass)).isEqualTo(ReturnType.INTEGER);
+	}
+
+	@ParameterizedTest // GH-3090
+	@ValueSource(classes = { Double.class, Float.class, String.class })
+	void shouldConsiderValueType(Class<?> listClass) {
+		assertThat(ReturnType.fromJavaType(listClass)).isEqualTo(ReturnType.VALUE);
+	}
+
 }