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.record;
  
  import org.apache.kafka.common.network.TransferableChannel;
  import org.apache.kafka.common.utils.Utils;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.Objects;
  
  /**
   * Represents a memory record set which is not necessarily offset-aligned
   */
  public class UnalignedMemoryRecords implements UnalignedRecords {
      private static final UnalignedMemoryRecords EMPTY = new UnalignedMemoryRecords(ByteBuffer.allocate(0));
  
      private final ByteBuffer buffer;
  
      public UnalignedMemoryRecords(ByteBuffer buffer) {
          this.buffer = Objects.requireNonNull(buffer);
      }
  
      public ByteBuffer buffer() {
          return buffer.duplicate();
      }
  
      @Override
      public int sizeInBytes() {
          return buffer.remaining();
      }
  
      @Override
      public int writeTo(TransferableChannel channel, int position, int length) throws IOException {
          if (((long) position) + length > buffer.limit())
              throw new IllegalArgumentException("position+length should not be greater than buffer.limit(), position: "
                      + position + ", length: " + length + ", buffer.limit(): " + buffer.limit());
          return Utils.tryWriteTo(channel, position, length, buffer);
      }
  
      public static UnalignedMemoryRecords empty() {
          return EMPTY;
      }
  }
  