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.activemq.artemis.utils.collections;
  
  import java.util.function.Consumer;
  
  public class RepeatableIteratorWrapper<E> implements RepeatableIterator<E>, ResettableIterator<E> {
  
     private ResettableIterator<E> iterator;
     private E last;
     private boolean repeat;
  
     public RepeatableIteratorWrapper(ResettableIterator<E> iterator) {
        this.iterator = iterator;
     }
  
     @Override
     public void repeat() {
        if (last != null) {
           repeat = true;
        }
     }
  
     @Override
     public void removed(E removed) {
        if (last == removed) {
           last = null;
        }
     }
  
     @Override
     public boolean hasNext() {
        return repeat || iterator.hasNext();
     }
  
     @Override
     public E next() {
        if (repeat) {
           repeat = false;
           return last;
        }
        return last = iterator.next();
     }
  
     @Override
     public void remove() {
        iterator.remove();
     }
  
     @Override
     public void forEachRemaining(Consumer<? super E> action) {
        iterator.forEachRemaining(action);
     }
  
     @Override
     public void reset() {
        iterator.reset();
     }
  }
  