In version 0.9.36, RoaringBitmap fixed compatibility issues with CRoaring

Author: wzqiang1332

clickhouse-client/src/main/java/com/clickhouse/client/data/ClickHouseBitmap.java

@@ -177,11 +177,16 @@ public void serialize(ByteBuffer buffer) {
                 }
 
                 byte[] bytes = bas.toByteArray();
-                for (int i = 4; i > 0; i--) {
-                    buffer.put(bytes[i]);
+                if (Roaring64NavigableMap.SERIALIZATION_MODE == Roaring64NavigableMap.SERIALIZATION_MODE_PORTABLE) {
+                    // In Roaring64NavigableMap SERIALIZATION_MODE_PORTABLE mode, binary serialization data consistent with the CRoaring. No other special processing is required
+                    buffer.put(bytes, 0, size);
+                } else {
+                    for (int i = 4; i > 0; i--) {
+                        buffer.put(bytes[i]);
+                    }
+                    buffer.putInt(0);
+                    buffer.put(bytes, 5, size - 5);
                 }
-                buffer.putInt(0);
-                buffer.put(bytes, 5, size - 5);
             } catch (IOException e) {
                 throw new IllegalStateException("Failed to serialize given bitmap", e);
             }
@@ -362,18 +367,23 @@ public static ClickHouseBitmap deserialize(DataInputStream in, ClickHouseDataTyp
                 b.deserialize(flip(newBuffer(len).put(bytes)));
                 rb = ClickHouseBitmap.wrap(b, innerType);
             } else {
-                // TODO implement a wrapper of DataInput to get rid of byte array here
-                bytes[0] = (byte) 0; // always unsigned
-                // read map size in big-endian byte order
-                for (int i = 4; i > 0; i--) {
-                    bytes[i] = in.readByte();
+                if (Roaring64NavigableMap.SERIALIZATION_MODE == Roaring64NavigableMap.SERIALIZATION_MODE_PORTABLE) {
+                    // In Roaring64NavigableMap SERIALIZATION_MODE_PORTABLE mode, binary serialization data consistent with the CRoaring
+                    in.readFully(bytes, 0 ,len);
+                } else {
+                    // TODO implement a wrapper of DataInput to get rid of byte array here
+                    bytes[0] = (byte) 0; // always unsigned
+                    // read map size in big-endian byte order
+                    for (int i = 4; i > 0; i--) {
+                        bytes[i] = in.readByte();
+                    }
+                    if (in.readByte() != 0 || in.readByte() != 0 || in.readByte() != 0 || in.readByte() != 0) {
+                        throw new IllegalStateException(
+                                "Not able to deserialize ClickHouseBitmap for too many bitmaps(>" + 0xFFFFFFFFL + ")!");
+                    }
+                    // read the rest
+                    in.readFully(bytes, 5, len - 8);
                 }
-                if (in.readByte() != 0 || in.readByte() != 0 || in.readByte() != 0 || in.readByte() != 0) { // NOSONAR
-                    throw new IllegalStateException(
-                            "Not able to deserialize ClickHouseBitmap for too many bitmaps(>" + 0xFFFFFFFFL + ")!");
-                }
-                // read the rest
-                in.readFully(bytes, 5, len - 8);
                 Roaring64NavigableMap b = new Roaring64NavigableMap();
                 b.deserialize(new DataInputStream(new ByteArrayInputStream(bytes)));
                 rb = ClickHouseBitmap.wrap(b, innerType);
@@ -593,12 +603,18 @@ public ByteBuffer toByteBuffer() {
             BinaryStreamUtils.writeVarInt(buf, size);
             serialize(buf);
         } else { // 64
-            // 1) deduct one to exclude the leading byte - boolean flag, see below:
-            // https://github.com/RoaringBitmap/RoaringBitmap/blob/0.9.9/RoaringBitmap/src/main/java/org/roaringbitmap/longlong/Roaring64NavigableMap.java#L1107
-            // 2) add 4 bytes because CRoaring uses long to store count of 32-bit bitmaps,
-            // while Java uses int - see
-            // https://github.com/RoaringBitmap/CRoaring/blob/v0.2.66/cpp/roaring64map.hh#L597
-            long size = serializedSizeInBytesAsLong() - 1 + 4;
+            long size = 0;
+            if (Roaring64NavigableMap.SERIALIZATION_MODE == Roaring64NavigableMap.SERIALIZATION_MODE_PORTABLE) {
+                // In Roaring64NavigableMap SERIALIZATION_MODE_PORTABLE mode, binary serialization data consistent with the CRoaring
+                size = serializedSizeInBytesAsLong();
+            } else {
+                // 1) deduct one to exclude the leading byte - boolean flag, see below:
+                // https://github.com/RoaringBitmap/RoaringBitmap/blob/0.9.9/RoaringBitmap/src/main/java/org/roaringbitmap/longlong/Roaring64NavigableMap.java#L1107
+                // 2) add 4 bytes because CRoaring uses long to store count of 32-bit bitmaps,
+                // while Java uses int - see
+                // https://github.com/RoaringBitmap/CRoaring/blob/v0.2.66/cpp/roaring64map.hh#L597
+                size = serializedSizeInBytesAsLong() - 1 + 4;
+            }
             int varIntSize = BinaryStreamUtils.getVarLongSize(size);
             // TODO add serialize(DataOutput) to handle more
             int intSize = (int) size;