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.tries;
  
  import java.util.Iterator;
  
  /**
   * Ordered iterator of trie content.
   */
  class TrieValuesIterator<T> implements Iterator<T>
  {
      private final Trie.Cursor<T> cursor;
      T next;
      boolean gotNext;
  
      protected TrieValuesIterator(Trie<T> trie)
      {
          cursor = trie.cursor(Direction.FORWARD);
          assert cursor.depth() == 0;
          next = cursor.content();
          gotNext = next != null;
      }
  
      public boolean hasNext()
      {
          if (!gotNext)
          {
              next = cursor.advanceToContent(null);
              gotNext = true;
          }
  
          return next != null;
      }
  
      public T next()
      {
          gotNext = false;
          T v = next;
          next = null;
          return v;
      }
  }
  