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 accord.utils;
  
  import java.util.AbstractSet;
  import java.util.Iterator;
  import java.util.Map;
  
  public class WrapAroundSet<T> extends AbstractSet<T>
  {
      final Map<T, Integer> lookup;
      final WrapAroundList<T> list;
  
      public WrapAroundSet(Map<T, Integer> lookup, WrapAroundList<T> list)
      {
          this.lookup = lookup;
          this.list = list;
      }
  
      @Override
      public boolean contains(Object o)
      {
          Integer i = lookup.get(o);
          if (i == null) return false;
          if (list.end > list.start)
              return i >= list.start && i < list.end;
          else
              return i >= list.start || i < list.end;
      }
  
      @Override
      public Iterator<T> iterator()
      {
          return list.iterator();
      }
  
      @Override
      public int size()
      {
          return list.size;
      }
  }
  