content: /*
   * 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 com.datastax.oss.driver.internal.core.protocol;
  
  import com.datastax.oss.protocol.internal.Frame;
  import com.datastax.oss.protocol.internal.FrameCodec;
  import com.datastax.oss.protocol.internal.PrimitiveCodec;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelOutboundHandlerAdapter;
  import io.netty.channel.ChannelPromise;
  import net.jcip.annotations.NotThreadSafe;
  
  @NotThreadSafe
  public class FrameToSegmentEncoder extends ChannelOutboundHandlerAdapter {
  
    private final PrimitiveCodec<ByteBuf> primitiveCodec;
    private final FrameCodec<ByteBuf> frameCodec;
    private final String logPrefix;
  
    private ByteBufSegmentBuilder segmentBuilder;
  
    public FrameToSegmentEncoder(
        @NonNull PrimitiveCodec<ByteBuf> primitiveCodec,
        @NonNull FrameCodec<ByteBuf> frameCodec,
        @NonNull String logPrefix) {
      this.primitiveCodec = primitiveCodec;
      this.frameCodec = frameCodec;
      this.logPrefix = logPrefix;
    }
  
    @Override
    public void handlerAdded(@NonNull ChannelHandlerContext ctx) {
      segmentBuilder = new ByteBufSegmentBuilder(ctx, primitiveCodec, frameCodec, logPrefix);
    }
  
    @Override
    public void write(
        @NonNull ChannelHandlerContext ctx, @NonNull Object msg, @NonNull ChannelPromise promise)
        throws Exception {
      if (msg instanceof Frame) {
        segmentBuilder.addFrame(((Frame) msg), promise);
      } else {
        super.write(ctx, msg, promise);
      }
    }
  
    @Override
    public void flush(@NonNull ChannelHandlerContext ctx) throws Exception {
      segmentBuilder.flush();
      super.flush(ctx);
    }
  }
  