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.utils;
  
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  // so we can instantiate anonymous classes implementing both interfaces
  public interface CloseableIterator<T> extends Iterator<T>, Closeable
  {
      public static <T> CloseableIterator<T> wrap(Iterator<T> iter)
      {
          return new CloseableIterator<T>()
          {
              public void close()
              {
                  // noop
              }
  
              public boolean hasNext()
              {
                  return iter.hasNext();
              }
  
              public T next()
              {
                  return iter.next();
              }
          };
      }
  
      public static <T> CloseableIterator<T> empty()
      {
          return new CloseableIterator<T>()
          {
              public void close()
              {
                  // noop
              }
  
              public boolean hasNext()
              {
                  return false;
              }
  
              public T next()
              {
                  throw new NoSuchElementException();
              }
          };
      }
  }
  