Android Open Source - itude-mobile-android-util Converted List

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License

The source code is released under:

Apache License

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Java Source Code

package com.itude.mobile.android.util;
/*from w w w.java2s  . com*/
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * Utility class to handle converting lists.
 * 
 * @param <From> {@link List} from 
 * @param <To> {@link List} to
 */
public class ConvertedList<From, To> extends AbstractList<To>
{
  public static interface Converter<From, To>
  {
    public To convert(From from);
  }

  private final List<From>          _backing;
  private final Converter<From, To> _converter;

  /**
   *  Constructor for ConvertedList.
   * 
   * @param backing {@link Collection} from
   * @param converter {@link Converter}
   */
  public ConvertedList(Collection<From> backing, Converter<From, To> converter)
  {
    _backing = backing instanceof List ? (List<From>) backing : new ArrayList<From>(backing);
    _converter = converter;
  }

  /**
   * @see java.util.AbstractList#get(int)
   */
  @Override
  public To get(int location)
  {
    return _converter.convert(_backing.get(location));
  }

  /**
   * @see java.util.AbstractCollection#size()
   */
  @Override
  public int size()
  {
    return _backing.size();
  }
}

Java Source Code List