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/*
* Copyright 2024 The Netty Project
*
* The Netty Project 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:
*
* https://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.netty.handler.codec.compression;
import com.github.luben.zstd.ZstdInputStreamNoFinalizer;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
/**
* Decompresses a compressed block {@link ByteBuf} using the Zstandard algorithm.
* See Zstandard.
*/
public final class ZstdDecoder extends ByteToMessageDecoder {
// Don't use static here as we want to still allow to load the classes.
{
try {
Zstd.ensureAvailability();
} catch (Throwable throwable) {
throw new ExceptionInInitializerError(throwable);
}
}
private final MutableByteBufInputStream inputStream = new MutableByteBufInputStream();
private ZstdInputStreamNoFinalizer zstdIs;
private State currentState = State.DECOMPRESS_DATA;
/**
* Current state of stream.
*/
private enum State {
DECOMPRESS_DATA,
CORRUPTED
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List
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