2 * Copyright (c) 2024 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package io.atomix.storage.journal;
18 import io.netty.buffer.ByteBuf;
19 import java.io.IOException;
20 import org.eclipse.jdt.annotation.NonNullByDefault;
23 * Support for mapping of {@link ByteBufJournal} entries to and from {@link ByteBuf}s.
26 public interface ByteBufMapper<T> {
28 * Converts the contents of a {@link ByteBuf} to an object.
30 * @param index entry index
31 * @param bytes entry bytes
32 * @return resulting object
34 T bytesToObject(final long index, ByteBuf bytes);
37 * Converts an object into a series of bytes in the specified {@link ByteBuf}.
39 * @param obj the object
40 * @param buf target buffer
41 * @throws IOException if an I/O error occurs
43 void objectToBytes(T obj, ByteBuf buf) throws IOException;