| /* |
| * 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.internal.CurrentState; |
| import io.opencensus.implcore.internal.CurrentState.State; |
| import io.opencensus.implcore.tags.TagContextImpl; |
| import io.opencensus.tags.TagContext; |
| import io.opencensus.tags.propagation.TagContextBinarySerializer; |
| import io.opencensus.tags.propagation.TagContextDeserializationException; |
| import io.opencensus.tags.propagation.TagContextSerializationException; |
| |
| final class TagContextBinarySerializerImpl extends TagContextBinarySerializer { |
| private static final byte[] EMPTY_BYTE_ARRAY = {}; |
| |
| private final CurrentState state; |
| |
| TagContextBinarySerializerImpl(CurrentState state) { |
| this.state = state; |
| } |
| |
| @Override |
| public byte[] toByteArray(TagContext tags) throws TagContextSerializationException { |
| return state.getInternal() == State.DISABLED |
| ? EMPTY_BYTE_ARRAY |
| : SerializationUtils.serializeBinary(tags); |
| } |
| |
| @Override |
| public TagContext fromByteArray(byte[] bytes) throws TagContextDeserializationException { |
| return state.getInternal() == State.DISABLED |
| ? TagContextImpl.EMPTY |
| : SerializationUtils.deserializeBinary(bytes); |
| } |
| } |