| /* |
| * 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.flink.table.typeutils.ordered; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.common.typeutils.base.TypeSerializerSingleton; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| |
| import java.io.IOException; |
| |
| /** |
| * A serializer for byte. The serialized value maintains the sort order of the original value. |
| */ |
| @Internal |
| public final class OrderedByteSerializer extends TypeSerializerSingleton<Byte> { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public static final OrderedByteSerializer ASC_INSTANCE = new OrderedByteSerializer(OrderedBytes.Order.ASCENDING); |
| |
| public static final OrderedByteSerializer DESC_INSTANCE = new OrderedByteSerializer(OrderedBytes.Order.DESCENDING); |
| |
| private static final Byte ZERO = (byte) 0; |
| |
| private static final OrderedBytes orderedBytes = new OrderedBytes(); |
| |
| private final OrderedBytes.Order ord; |
| |
| private OrderedByteSerializer(OrderedBytes.Order ord) { |
| this.ord = ord; |
| } |
| |
| @Override |
| public boolean isImmutableType() { |
| return true; |
| } |
| |
| @Override |
| public Byte createInstance() { |
| return ZERO; |
| } |
| |
| @Override |
| public Byte copy(Byte from) { |
| return from; |
| } |
| |
| @Override |
| public Byte copy(Byte from, Byte reuse) { |
| return from; |
| } |
| |
| @Override |
| public int getLength() { |
| return 1; |
| } |
| |
| @Override |
| public void serialize(Byte record, DataOutputView target) throws IOException { |
| orderedBytes.encodeByte(target, record, ord); |
| } |
| |
| @Override |
| public Byte deserialize(DataInputView source) throws IOException { |
| return orderedBytes.decodeByte(source, ord); |
| } |
| |
| @Override |
| public Byte deserialize(Byte reuse, DataInputView source) throws IOException { |
| return deserialize(source); |
| } |
| |
| @Override |
| public void copy(DataInputView source, DataOutputView target) throws IOException { |
| orderedBytes.encodeByte(target, orderedBytes.decodeByte(source, ord), ord); |
| } |
| |
| @Override |
| public boolean canEqual(Object obj) { |
| return obj instanceof OrderedByteSerializer; |
| } |
| } |