Android Open Source - unknown-pleasures Animator Factory

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Java Source Code

/**
 * AnimatorFactory.java//  w w w  .  j  a v  a  2  s  .  c o  m
 * Author: marek.brodziak@gmail.com
 * Created: May 6, 2014
 * Copyright 2014 by miniti
 */

package pl.miniti.android.pleasures.animation;

import android.util.Log;

/**
 * Factory of the {@see Animator} implementations
 */
public class AnimatorFactory {

  /**
   * Tag name for the logger
   */
  private static final String T = AnimatorFactory.class.getSimpleName();

  /**
   * Enumeration of available implementations
   */
  private enum Impl {

    /**
     * Default implementation for this factory
     */
    DEFAULT(ScrollableOriginalCoverAnimator.class),
    /**
     */
    VERTICAL(ScrollableOriginalCoverAnimator.class),
    /**
     */
    STRECH(StrechOriginalCoverAnimator.class),
    /**
     */
    HORIZONTAL(HorizontalScrollAnimator.class);

    private Class<? extends Animator> animatorClass;

    private Impl(Class<? extends Animator> ac) {
      if (ac == null) {
        throw new IllegalArgumentException(
            "null is not a valid Animator implementation");
      }
      animatorClass = ac;
    }
  }

  /**
   * Construct a new instance based on the configuration
   * 
   * @param value
   *            configuration value
   * @return object instance
   */
  public static Animator newInstance(String value) {
    Log.d(T, String.format("Searching for Animator %s", value));
    try {

      if (value == null) {
        Log.d(T, String.format(
            "Constructing a default Animator implementation %s",
            Impl.DEFAULT.animatorClass.getSimpleName()));
        return Impl.DEFAULT.animatorClass.newInstance();
      }

      for (Impl a : Impl.values()) {
        if (a.animatorClass.getName().equals(value)) {
          Log.d(T, "Match found");
          return a.animatorClass.newInstance();
        }
      }

      Log.w(T, String.format("%s is not a registered Animator", value));
      Log.d(T, String.format(
          "Constructing a default Animator implementation %s",
          Impl.DEFAULT.animatorClass.getSimpleName()));
      return Impl.DEFAULT.animatorClass.newInstance();

    } catch (InstantiationException e) {
      Log.e(T, "Error while creating an Animator", e);
    } catch (IllegalAccessException e) {
      Log.e(T, "Error raised while creating an Animator", e);
    }

    Log.d(T, "Fall back to constructing from code");
    return new ScrollableOriginalCoverAnimator();
  }

  /**
   * Construct a new default instance
   * 
   * @return object instance
   */
  public static Animator newInstance() {
    return newInstance(null);
  }
}

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