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Special Java 1.8+ Library with extended collection related functionality

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/**
 * Copyright (C) 2014-2020 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * Licensed 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 com.helger.collection;

import java.util.AbstractSet;
import java.util.Comparator;
import java.util.Iterator;
import java.util.SortedSet;

import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.helger.commons.annotation.CodingStyleguideUnaware;
import com.helger.commons.collection.impl.ICommonsSortedSet;
import com.helger.commons.collection.iterate.EmptyIterator;

/**
 * Default implementation of an empty sorted set.
 *
 * @author Philip Helger
 * @param 
 *        Content type
 */
public final class EmptySortedSet  extends AbstractSet  implements ICommonsSortedSet 
{
  public EmptySortedSet ()
  {}

  @Override
  @Nonnull
  public Iterator  iterator ()
  {
    return new EmptyIterator <> ();
  }

  @Override
  @Nonnegative
  public int size ()
  {
    return 0;
  }

  @Override
  public boolean isEmpty ()
  {
    return true;
  }

  @Override
  public boolean contains (final Object obj)
  {
    return false;
  }

  @Nullable
  public Comparator