net.sf.staccatocommons.collections.stream.internal.DequeStream Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of staccatissimo-collections Show documentation

Collections library of the Staccatissimo project, focused on providing new abstractions that mix object oriented and functional programming style for dealing with iterable objects.

The newest version!

/**
 *  Copyright (c) 2010-2012, The StaccatoCommons 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.internal;

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

import net.sf.staccatocommons.collections.iterable.internal.IterablesInternal;
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 head() {
    IterablesInternal.checkNotEmpty(this);
    return getCollection().getFirst();
  }

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

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

}