1 files changed, 38 insertions, 25 deletions
diff --git a/java/src/main/java/com/google/protobuf/nano/UnknownFieldData.java b/java/src/main/java/com/google/protobuf/nano/UnknownFieldData.java
index 833ed2a..2032e1a 100644
--- a/java/src/main/java/com/google/protobuf/nano/UnknownFieldData.java
+++ b/java/src/main/java/com/google/protobuf/nano/UnknownFieldData.java
@@ -30,42 +30,55 @@
 
 package com.google.protobuf.nano;
 
+import java.io.IOException;
 import java.util.Arrays;
 
 /**
- * Stores unknown fields. These might be extensions or fields that the generated API doesn't
- * know about yet.
+ * Stores unknown fields. These might be extensions or fields that the generated
+ * API doesn't know about yet.
  *
  * @author bduff@google.com (Brian Duff)
  */
-public final class UnknownFieldData {
+final class UnknownFieldData {
 
-  final int tag;
-  final byte[] bytes;
+    final int tag;
+    final byte[] bytes;
 
-  UnknownFieldData(int tag, byte[] bytes) {
-    this.tag = tag;
-    this.bytes = bytes;
-  }
+    UnknownFieldData(int tag, byte[] bytes) {
+        this.tag = tag;
+        this.bytes = bytes;
+    }
 
-  @Override
-  public boolean equals(Object o) {
-    if (o == this) {
-      return true;
+    int computeSerializedSize() {
+        int size = 0;
+        size += CodedOutputByteBufferNano.computeRawVarint32Size(tag);
+        size += bytes.length;
+        return size;
     }
-    if (!(o instanceof UnknownFieldData)) {
-      return false;
+
+    void writeTo(CodedOutputByteBufferNano output) throws IOException {
+        output.writeRawVarint32(tag);
+        output.writeRawBytes(bytes);
     }
 
-    UnknownFieldData other = (UnknownFieldData) o;
-    return tag == other.tag && Arrays.equals(bytes, other.bytes);
-  }
+    @Override
+    public boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof UnknownFieldData)) {
+            return false;
+        }
 
-  @Override
-  public int hashCode() {
-    int result = 17;
-    result = 31 * result + tag;
-    result = 31 * result + Arrays.hashCode(bytes);
-    return result;
-  }
+        UnknownFieldData other = (UnknownFieldData) o;
+        return tag == other.tag && Arrays.equals(bytes, other.bytes);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = 17;
+        result = 31 * result + tag;
+        result = 31 * result + Arrays.hashCode(bytes);
+        return result;
+    }
 }