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.cassandra.sidecar.restore;
  
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  import org.apache.cassandra.sidecar.common.utils.HttpRange;
  import org.apache.cassandra.sidecar.common.utils.Preconditions;
  
  /**
   * Iterator over the produced http ranges
   */
  public class HttpRangesIterator implements Iterator<HttpRange>
  {
      private final long totalBytes;
      private final int rangeSize;
      private long offset = 0;
  
      public HttpRangesIterator(long totalBytes, int rangeSize)
      {
          Preconditions.checkArgument(totalBytes > 0, "totalBytes must be positive");
          Preconditions.checkArgument(rangeSize > 0, "rangeSize must be positive");
          this.totalBytes = totalBytes;
          this.rangeSize = rangeSize;
      }
  
      @Override
      public boolean hasNext()
      {
          return offset < totalBytes;
      }
  
      @Override
      public HttpRange next()
      {
          if (!hasNext())
          {
              throw new NoSuchElementException("No more HttpRanges");
          }
          long end = Math.min(offset + rangeSize, totalBytes) - 1;
          HttpRange range = HttpRange.of(offset, end);
          offset = end + 1;
          return range;
      }
  }
  