[JDBC] Connection#createArray & Connection#createStruct

client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java

@@ -32,6 +32,7 @@
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.TimeZone;
 import java.util.UUID;
@@ -667,7 +668,7 @@ public static class ArrayValue {
 
         int nextPos = 0;
 
-        ArrayValue(Class<?> itemType, int length) {
+        public ArrayValue(Class<?> itemType, int length) {
             this.itemType = itemType;
             this.length = length;
 
@@ -721,6 +722,34 @@ public synchronized <T> List<T> asList() {
             }
             return (List<T>) list;
         }
+
+        /**
+         * Returns internal array. This method is only useful to work with array of primitives (int[], boolean[]).
+         * Otherwise use {@link #getArrayOfObjects()}
+         *
+         * @return
+         */
+        public Object getArray() {
+            return array;
+        }
+
+        /**
+         * Returns array of objects.
+         * If item type is primitive then all elements will be converted into objects.
+         *
+         * @return
+         */
+        public Object[] getArrayOfObjects() {
+            if (itemType.isPrimitive()) {
+                Object[] result = new Object[length];
+                for (int i = 0; i < length; i++) {
+                    result[i] = Array.get(array, i);
+                }
+                return result;
+            } else {
+                return (Object[]) array;
+            }
+        }
     }
 
     public static class EnumValue extends Number {

client-v2/src/test/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReaderTests.java

@@ -3,9 +3,11 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.lang.reflect.Array;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
+import java.util.Arrays;
 import java.util.TimeZone;
 
 import org.testng.Assert;
@@ -176,4 +178,16 @@ private Object[][] provideDateTimeTestData() {
         };
     }
 
+    @Test
+    public void testArrayValue() throws Exception {
+        BinaryStreamReader.ArrayValue array = new BinaryStreamReader.ArrayValue(int.class, 10);
+
+        for (int i = 0; i < array.length(); i++) {
+            array.set(i, i);
+        }
+
+        int[] array1 = (int[]) array.getArray();
+        Object[] array2 = array.getArrayOfObjects();
+        Assert.assertEquals(array1.length, array2.length);
+    }
 }