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.db.partitions;
  
  import java.util.NoSuchElementException;
  
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.db.rows.UnfilteredRowIterator;
  
  public class SingletonUnfilteredPartitionIterator implements UnfilteredPartitionIterator
  {
      private final UnfilteredRowIterator iter;
      private boolean returned;
  
      public SingletonUnfilteredPartitionIterator(UnfilteredRowIterator iter)
      {
          this.iter = iter;
      }
  
      public TableMetadata metadata()
      {
          return iter.metadata();
      }
  
      public boolean hasNext()
      {
          return !returned;
      }
  
      public UnfilteredRowIterator next()
      {
          if (returned)
              throw new NoSuchElementException();
  
          returned = true;
          return iter;
      }
  
      public void remove()
      {
          throw new UnsupportedOperationException();
      }
  
      public void close()
      {
          if (!returned)
              iter.close();
      }
  }
  