Android Open Source - unknown-pleasures Palette Factory

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Java Source Code

/**
 * PaletteFactory.java/*  www  .j  a  v  a2s  .c  o  m*/
 * Author: marek.brodziak@gmail.com
 * Created: May 6, 2014
 * Copyright 2014 by miniti
 */

package pl.miniti.android.pleasures.palette;

import android.util.Log;

/**
 * Factory of the {@see Palette} implementations
 */
public class PaletteFactory {

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

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

    /**
     * Default implementation for this factory
     */
    DEFAULT(WhitePalette.class),
    /**
     * White on black
     */
    WHITE(WhitePalette.class),
    /**
     * Black on white
     */
    BLACK(BlackPalette.class),
    /**
     * Retro palette #1
     */
    RETRO1(Retro1Palette.class),
    /**
     * Retro palette #2
     */
    RETRO2(Retro2Palette.class),
    /**
     * Retro blue on white background
     */
    BLUE(BluePalette.class),
    /**
     * Sundown palette on black background
     */
    SUNDOWN(PinkPalette.class);

    private Class<? extends Palette> paletteClass;

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

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

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

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

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

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

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

Java Source Code List