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 org.apache.kafka.common.requests;
  
  import org.apache.kafka.common.network.TransferableChannel;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  
  public class ByteBufferChannel implements TransferableChannel {
      private final ByteBuffer buf;
      private boolean closed = false;
  
      public ByteBufferChannel(long size) {
          if (size > Integer.MAX_VALUE)
              throw new IllegalArgumentException("size should be not be greater than Integer.MAX_VALUE");
          this.buf = ByteBuffer.allocate((int) size);
      }
  
      @Override
      public long write(ByteBuffer[] srcs, int offset, int length) {
          if ((offset < 0) || (length < 0) || (offset > srcs.length - length))
              throw new IndexOutOfBoundsException();
          int position = buf.position();
          int count = offset + length;
          for (int i = offset; i < count; i++) buf.put(srcs[i].duplicate());
          return buf.position() - position;
      }
  
      @Override
      public long write(ByteBuffer[] srcs) {
          return write(srcs, 0, srcs.length);
      }
  
      @Override
      public int write(ByteBuffer src) {
          return (int) write(new ByteBuffer[]{src});
      }
  
      @Override
      public boolean isOpen() {
          return !closed;
      }
  
      @Override
      public void close() {
          buf.flip();
          closed = true;
      }
  
      public ByteBuffer buffer() {
          return buf;
      }
  
      @Override
      public boolean hasPendingWrites() {
          return false;
      }
  
      @Override
      public long transferFrom(FileChannel fileChannel, long position, long count) throws IOException {
          return fileChannel.transferTo(position, count, this);
      }
  }
  