1 files changed, 48 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/tags/propagation/TagContextBinarySerializerImpl.java b/impl_core/src/main/java/io/opencensus/implcore/tags/propagation/TagContextBinarySerializerImpl.java
new file mode 100644
index 00000000..eea24a33
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/tags/propagation/TagContextBinarySerializerImpl.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017, OpenCensus Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opencensus.implcore.tags.propagation;
+
+import io.opencensus.implcore.tags.CurrentTaggingState;
+import io.opencensus.implcore.tags.TagContextImpl;
+import io.opencensus.tags.TagContext;
+import io.opencensus.tags.TaggingState;
+import io.opencensus.tags.propagation.TagContextBinarySerializer;
+import io.opencensus.tags.propagation.TagContextDeserializationException;
+
+final class TagContextBinarySerializerImpl extends TagContextBinarySerializer {
+  private static final byte[] EMPTY_BYTE_ARRAY = {};
+
+  private final CurrentTaggingState state;
+
+  TagContextBinarySerializerImpl(CurrentTaggingState state) {
+    this.state = state;
+  }
+
+  @Override
+  public byte[] toByteArray(TagContext tags) {
+    return state.get() == TaggingState.DISABLED
+        ? EMPTY_BYTE_ARRAY
+        : SerializationUtils.serializeBinary(tags);
+  }
+
+  @Override
+  public TagContext fromByteArray(byte[] bytes) throws TagContextDeserializationException {
+    return state.get() == TaggingState.DISABLED
+        ? TagContextImpl.EMPTY
+        : SerializationUtils.deserializeBinary(bytes);
+  }
+}