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/*
 * Copyright 2020 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.incubator.codec.quic;

import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.DefaultChannelConfig;
import io.netty.channel.MessageSizeEstimator;
import io.netty.channel.RecvByteBufAllocator;
import io.netty.channel.WriteBufferWaterMark;
import org.jetbrains.annotations.Nullable;

import java.util.Map;

/**
 * Default {@link QuicChannelConfig} implementation.
 */
final class QuicheQuicChannelConfig extends DefaultChannelConfig implements QuicChannelConfig {

    private volatile QLogConfiguration qLogConfiguration;
    private volatile SegmentedDatagramPacketAllocator segmentedDatagramPacketAllocator =
            SegmentedDatagramPacketAllocator.NONE;

    QuicheQuicChannelConfig(Channel channel) {
        super(channel);
    }

    @Override
    public Map, Object> getOptions() {
        return getOptions(super.getOptions(),
                QuicChannelOption.QLOG, QuicChannelOption.SEGMENTED_DATAGRAM_PACKET_ALLOCATOR);
    }

    @SuppressWarnings("unchecked")
    @Override
    public  T getOption(ChannelOption option) {
        if (option == QuicChannelOption.QLOG) {
            return (T) getQLogConfiguration();
        }
        if (option == QuicChannelOption.SEGMENTED_DATAGRAM_PACKET_ALLOCATOR) {
            return (T) getSegmentedDatagramPacketAllocator();
        }
        return super.getOption(option);
    }

    @Override
    public  boolean setOption(ChannelOption option, T value) {
        if (option == QuicChannelOption.QLOG) {
            setQLogConfiguration((QLogConfiguration) value);
            return true;
        }
        if (option == QuicChannelOption.SEGMENTED_DATAGRAM_PACKET_ALLOCATOR) {
            setSegmentedDatagramPacketAllocator((SegmentedDatagramPacketAllocator) value);
            return true;
        }
        return super.setOption(option, value);
    }

    @Override
    public QuicChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
        super.setConnectTimeoutMillis(connectTimeoutMillis);
        return this;
    }

    @Override
    @Deprecated
    public QuicChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
        super.setMaxMessagesPerRead(maxMessagesPerRead);
        return this;
    }

    @Override
    public QuicChannelConfig setWriteSpinCount(int writeSpinCount) {
        super.setWriteSpinCount(writeSpinCount);
        return this;
    }

    @Override
    public QuicChannelConfig setAllocator(ByteBufAllocator allocator) {
        super.setAllocator(allocator);
        return this;
    }

    @Override
    public QuicChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
        super.setRecvByteBufAllocator(allocator);
        return this;
    }

    @Override
    public QuicChannelConfig setAutoRead(boolean autoRead) {
        super.setAutoRead(autoRead);
        return this;
    }

    @Override
    public QuicChannelConfig setAutoClose(boolean autoClose) {
        super.setAutoClose(autoClose);
        return this;
    }

    @Override
    public QuicChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
        super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
        return this;
    }

    @Override
    public QuicChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
        super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
        return this;
    }

    @Override
    public QuicChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
        super.setWriteBufferWaterMark(writeBufferWaterMark);
        return this;
    }

    @Override
    public QuicChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
        super.setMessageSizeEstimator(estimator);
        return this;
    }

    @Nullable
    QLogConfiguration getQLogConfiguration() {
        return qLogConfiguration;
    }

    private void setQLogConfiguration(QLogConfiguration qLogConfiguration) {
        if (channel.isRegistered()) {
            throw new IllegalStateException("QLOG can only be enabled before the Channel was registered");
        }
        this.qLogConfiguration = qLogConfiguration;
    }

    SegmentedDatagramPacketAllocator getSegmentedDatagramPacketAllocator() {
        return segmentedDatagramPacketAllocator;
    }

    private void setSegmentedDatagramPacketAllocator(
            SegmentedDatagramPacketAllocator segmentedDatagramPacketAllocator) {
        this.segmentedDatagramPacketAllocator = segmentedDatagramPacketAllocator;
    }
}




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