net.sf.staccatocommons.collections.stream.impl.internal.UndefinedStream Maven / Gradle / Ivy

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/*
 Copyright (c) 2011, The Staccato-Commons Team

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; version 3 of the License.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 */
package net.sf.staccatocommons.collections.stream.impl.internal;

import net.sf.staccatocommons.collections.stream.AbstractStream;
import net.sf.staccatocommons.collections.stream.Stream;
import net.sf.staccatocommons.iterators.thriter.Thriterator;
import net.sf.staccatocommons.iterators.thriter.Thriterators;
import net.sf.staccatocommons.lang.thunk.Thunks;
import net.sf.staccatocommons.restrictions.Constant;

/**
 * @author flbulgarelli
 * 
 */
public final class UndefinedStream extends AbstractStream {

  private static final UndefinedStream INSTANCE = new UndefinedStream();

  public Thriterator iterator() {
    return Thriterators.from(Thunks. undefined());
  }

  /**
   * Answers an undefined stream
   * 
   * @param 
   * @return a undefined {@link Stream}
   */
  @Constant
  public static  Stream undefined() {
    return INSTANCE;
  }

}