Add metadataFormatIsEmpty in TarantoolTuple

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 - Remove config request timeout as default parameter in crud client
 - Add details for the case of space metadata fetching failure ([#200](https://github.com/tarantool/cartridge-java/issues/200))
+- Add metadataFormatIsEmpty in TarantoolTuple
 - Close public access to TarantoolResult*Impl ([#326](https://github.com/tarantool/cartridge-java/issues/326))
 - Split retrying into more detailed modules ([#341](https://github.com/tarantool/cartridge-java/issues/341))
 - Add deep copy instead of shallow copy in default message pack mapper ([#166](https://github.com/tarantool/cartridge-java/issues/166))

src/main/java/io/tarantool/driver/api/tuple/TarantoolTuple.java

@@ -14,6 +14,13 @@
  * @author Alexey Kuzin
  */
 public interface TarantoolTuple extends Iterable<TarantoolField>, Packable {
+    /**
+     * Check whether this tuple includes information about space format
+     *
+     * @return true if we can obtain the tuple fields by names
+     */
+    boolean hasMetadata();
+
     /**
      * Get a tuple field by its position
      *

src/main/java/io/tarantool/driver/core/tuple/TarantoolTupleImpl.java

@@ -136,6 +136,12 @@ public TarantoolTupleImpl(ArrayValue value, MessagePackMapper mapper, TarantoolS
         }
     }
 
+    @Override
+    public boolean hasMetadata() {
+        return spaceMetadata == null || spaceMetadata.getSpaceFormatMetadata() == null ||
+                   spaceMetadata.getSpaceFormatMetadata().isEmpty();
+    }
+
     @Override
     public Optional<TarantoolField> getField(int fieldPosition) {
         Assert.state(fieldPosition >= 0, "Field position starts with 0");

src/test/java/io/tarantool/driver/integration/ClusterTarantoolTupleClientIT.java

@@ -22,7 +22,7 @@
 import io.tarantool.driver.mappers.TarantoolTupleResultMapperFactory;
 import io.tarantool.driver.mappers.TarantoolTupleResultMapperFactoryImpl;
 import io.tarantool.driver.mappers.factories.DefaultMessagePackMapperFactory;
-import io.tarantool.driver.mappers.factories.ResultMapperFactoryFactoryImpl;
+
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
@@ -404,7 +404,19 @@ public void callForTarantoolResultTest() throws Exception {
         ).get();
 
         assertTrue(result.size() >= 3);
-        assertEquals(1605, result.get(0).getInteger("year"));
+        TarantoolTuple tuple = result.get(0);
+        assertFalse(tuple.hasMetadata());
+        assertEquals(1605, tuple.getInteger("year"));
+
+        result = client.call(
+            "user_function_complex_query",
+            Collections.singletonList(1000),
+            defaultMapper,
+            factory.withSingleValueArrayToTarantoolTupleResultMapper(defaultMapper, null)
+        ).get();
+        assertTrue(result.size() >= 3);
+        tuple = result.get(0);
+        assertTrue(tuple.hasMetadata());
     }
 
     @Test