| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.kafka.streams.kstream.internals; |
| |
| import org.apache.kafka.common.serialization.Deserializer; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| |
| public class ChangedDeserializer<T> implements Deserializer<Change<T>> { |
| |
| private static final int NEWFLAG_SIZE = 1; |
| |
| private Deserializer<T> inner; |
| |
| public ChangedDeserializer(Deserializer<T> inner) { |
| this.inner = inner; |
| } |
| |
| public Deserializer<T> inner() { |
| return inner; |
| } |
| |
| public void setInner(Deserializer<T> inner) { |
| this.inner = inner; |
| } |
| |
| @Override |
| public void configure(Map<String, ?> configs, boolean isKey) { |
| // do nothing |
| } |
| |
| @Override |
| public Change<T> deserialize(String topic, byte[] data) { |
| |
| byte[] bytes = new byte[data.length - NEWFLAG_SIZE]; |
| |
| System.arraycopy(data, 0, bytes, 0, bytes.length); |
| |
| if (ByteBuffer.wrap(data).get(data.length - NEWFLAG_SIZE) != 0) { |
| return new Change<>(inner.deserialize(topic, bytes), null); |
| } else { |
| return new Change<>(null, inner.deserialize(topic, bytes)); |
| } |
| } |
| |
| |
| @Override |
| public void close() { |
| inner.close(); |
| } |
| } |