ColorPool.java

/*******************************************************************************
 * Copyright (c) 2013, Daniel Murphy All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met: * Redistributions of source code must retain the
 * above copyright notice, this list of conditions and the following disclaimer. * Redistributions
 * in binary form must reproduce the above copyright notice, this list of conditions and the
 * following disclaimer in the documentation and/or other materials provided with the distribution.
 * 
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 ******************************************************************************/
/**
 * Created at 3:29:28 AM Jul 17, 2010
 */
package org.jbox2d.testbed.pooling;

import java.util.HashMap;

/**
 * Sun just HAD to make {@link Color} immutable, so now I have to make another stupid pool and now
 * I'm all hot and bothered. Also, this pool isn't thread safe!
 * 
 * @author Daniel Murphy
 */
public abstract class ColorPool<C> {

  private HashMap<ColorKey, C> colorMap = new HashMap<ColorKey, C>();

  private final ColorKey queryKey = new ColorKey();

  public C getColor(float r, float g, float b, float alpha) {

    queryKey.set(r, g, b, alpha);
    if (colorMap.containsKey(queryKey)) {
      return colorMap.get(queryKey);
    } else {
      C c = newColor(r, g, b, alpha);
      ColorKey ck = new ColorKey();
      ck.set(r, g, b, alpha);
      colorMap.put(ck, c);
      return c;
    }
  }

  protected abstract C newColor(float r, float g, float b, float alpha);

  public C getColor(float r, float g, float b) {
    return getColor(r, g, b, 1);
  }
}


class ColorKey {
  float r, g, b, a;

  public void set(float argR, float argG, float argB) {
    set(argR, argG, argB, 1);
  }

  public void set(float argR, float argG, float argB, float argA) {
    r = argR;
    g = argG;
    b = argB;
    a = argA;
  }

  /**
   * generated by eclipse! woooo!
   * 
   * @see java.lang.Object#hashCode()
   */
  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + Float.floatToIntBits(a);
    result = prime * result + Float.floatToIntBits(b);
    result = prime * result + Float.floatToIntBits(g);
    result = prime * result + Float.floatToIntBits(r);
    return result;
  }

  /**
   * generated by eclipse! woooo!
   * 
   * @see java.lang.Object#equals(java.lang.Object)
   */
  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    ColorKey other = (ColorKey) obj;
    if (Float.floatToIntBits(a) != Float.floatToIntBits(other.a))
      return false;
    if (Float.floatToIntBits(b) != Float.floatToIntBits(other.b))
      return false;
    if (Float.floatToIntBits(g) != Float.floatToIntBits(other.g))
      return false;
    if (Float.floatToIntBits(r) != Float.floatToIntBits(other.r))
      return false;
    return true;
  }
}