From 30ad70f2eca08d0be6046b984000ed8269ffbe76 Mon Sep 17 00:00:00 2001
From: Caideyipi <87789683+Caideyipi@users.noreply.github.com>
Date: Wed, 22 Apr 2026 16:32:03 +0800
Subject: [PATCH] none

---
 .../main/java/org/apache/tsfile/utils/Constants.java   |  8 ++++++++
 .../java/org/apache/tsfile/utils/ReadWriteIOUtils.java | 10 +++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/java/common/src/main/java/org/apache/tsfile/utils/Constants.java b/java/common/src/main/java/org/apache/tsfile/utils/Constants.java
index cbdb26af1..fd89d14a9 100644
--- a/java/common/src/main/java/org/apache/tsfile/utils/Constants.java
+++ b/java/common/src/main/java/org/apache/tsfile/utils/Constants.java
@@ -102,4 +102,12 @@ private Constants() {} // can't construct
       JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 9);
   public static final boolean JRE_IS_MINIMUM_JAVA11 =
       JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 11);
+
+  public static class None {
+    private None() {
+      // Singleton
+    }
+  }
+
+  public static final None NONE = new None();
 }
diff --git a/java/tsfile/src/main/java/org/apache/tsfile/utils/ReadWriteIOUtils.java b/java/tsfile/src/main/java/org/apache/tsfile/utils/ReadWriteIOUtils.java
index e6b72e40d..c7c7a54fa 100644
--- a/java/tsfile/src/main/java/org/apache/tsfile/utils/ReadWriteIOUtils.java
+++ b/java/tsfile/src/main/java/org/apache/tsfile/utils/ReadWriteIOUtils.java
@@ -48,6 +48,7 @@
 import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.FLOAT;
 import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.INTEGER;
 import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.LONG;
+import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.NONE;
 import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.NULL;
 import static org.apache.tsfile.utils.ReadWriteIOUtils.ClassSerializeId.STRING;
 
@@ -1168,7 +1169,8 @@ public enum ClassSerializeId {
     BOOLEAN,
     STRING,
     TAG,
-    NULL
+    NULL,
+    NONE,
   }
 
   public static void writeObject(Object value, DataOutputStream outputStream) {
@@ -1195,6 +1197,8 @@ public static void writeObject(Object value, DataOutputStream outputStream) {
         outputStream.write(Boolean.TRUE.equals(value) ? 1 : 0);
       } else if (value == null) {
         outputStream.write(NULL.ordinal());
+      } else if (value == Constants.NONE) {
+        outputStream.write(NONE.ordinal());
       } else {
         outputStream.write(STRING.ordinal());
         byte[] bytes = value.toString().getBytes();
@@ -1229,6 +1233,8 @@ public static void writeObject(Object value, ByteBuffer byteBuffer) {
       byteBuffer.put(Boolean.TRUE.equals(value) ? (byte) 1 : (byte) 0);
     } else if (value == null) {
       byteBuffer.putInt(NULL.ordinal());
+    } else if (value == Constants.NONE) {
+      byteBuffer.putInt(NONE.ordinal());
     } else {
       byteBuffer.putInt(STRING.ordinal());
       byte[] bytes = value.toString().getBytes();
@@ -1257,6 +1263,8 @@ public static Object readObject(ByteBuffer buffer) {
         return new Binary(bytes);
       case NULL:
         return null;
+      case NONE:
+        return Constants.NONE;
       case STRING:
       default:
         length = buffer.getInt();