net.sf.staccatocommons.collections.stream.impl.DequeStream 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;

import java.util.Collection;
import java.util.Deque;

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;

/**
 * @author flbulgarelli
 * 
 */
public class DequeStream extends CollectionStream {

  /**
   * Creates a new {@link DequeStream}
   */
  public DequeStream(Collection collection) {
    super(collection);
  }

  public Stream reverse() {
    return new AbstractStream() {
      public Thriterator iterator() {
        return Thriterators.from(getCollection().descendingIterator());
      }

      public boolean contains(A element) {
        return DequeStream.this.contains(element);
      }

      public boolean isEmpty() {
        return DequeStream.this.isEmpty();
      }

      public Stream reverse() {
        return DequeStream.this;
      }
    };
  }

  public final A first() {
    return getCollection().getFirst();
  }

  public final A last() {
    return getCollection().getLast();
  }

  protected Deque getCollection() {
    return (Deque) super.getCollection();
  }

}