src/main/java/charactermanaj/graphics/ColorConvertedImageCachedLoader.java

   1 package charactermanaj.graphics;
   2
   3 import java.io.IOException;
   4
   5 import charactermanaj.graphics.colormodel.ColorModel;
   6 import charactermanaj.graphics.filters.ColorConvertParameter;
   7 import charactermanaj.graphics.io.ImageCache;
   8 import charactermanaj.graphics.io.ImageCachedLoader;
   9 import charactermanaj.graphics.io.ImageLoader;
  10 import charactermanaj.graphics.io.ImageResource;
  11 import charactermanaj.graphics.io.LoadedImage;
  12
  13 /**
  14  * 画像リソースに対する色変換後の画像イメージを返します.<br>
  15  * 一度読み込まれ色変換された画像は、画像ファイルの更新日が同一であり、且つ、色パラメータに変更がなければ
  16  * 読み込み済みの画像イメージを返します.<br>
  17  * @author seraphy
  18  *
  19  */
  20 public class ColorConvertedImageCachedLoader extends ColorConvertedImageLoaderImpl {
  21
  22         private ImageCache<ColorConvertedImageKey> caches = new ImageCache<ColorConvertedImageKey>();
  23
  24         public ColorConvertedImageCachedLoader() {
  25                 this(new ImageCachedLoader());
  26         }
  27
  28         public ColorConvertedImageCachedLoader(ImageLoader imageLoader) {
  29                 super(imageLoader);
  30         }
  31
  32         @Override
  33         public LoadedImage load(ImageResource file,
  34                         ColorConvertParameter colorConvParam, ColorModel colorModel)
  35                         throws IOException {
  36                 if (file == null) {
  37                         throw new IllegalArgumentException();
  38                 }
  39
  40                 ColorConvertParameter param;
  41                 if (colorConvParam == null) {
  42                         param = new ColorConvertParameter();
  43                 } else {
  44                         param = colorConvParam.clone();
  45                 }
  46                 ColorConvertedImageKey key = new ColorConvertedImageKey(param, file);
  47
  48                 synchronized (caches) {
  49                         LoadedImage loadedImage = caches.get(key);
  50                         if (loadedImage == null) {
  51                                 loadedImage = super.load(file, param, colorModel);
  52                                 caches.set(key, loadedImage);
  53                         }
  54                         return loadedImage;
  55                 }
  56         }
  57
  58         @Override
  59         public void close() {
  60             caches.clear();
  61             super.close();
  62         }
  63
  64         public void unlockImages() {
  65                 caches.unlockImages();
  66         }
  67
  68 }
  69
  70 final class ColorConvertedImageKey {
  71
  72         private final ColorConvertParameter colorConvParameter;
  73
  74         private final ImageResource imageResource;
  75
  76         private final long lastModified;
  77
  78         private final int hashCode;
  79
  80         public ColorConvertedImageKey(ColorConvertParameter colorConvParameter, ImageResource imageResource) {
  81                 if (colorConvParameter == null || imageResource == null) {
  82                         throw new IllegalArgumentException();
  83                 }
  84                 this.colorConvParameter = colorConvParameter;
  85                 this.imageResource = imageResource;
  86                 this.lastModified = imageResource.lastModified();
  87                 this.hashCode = imageResource.hashCode()
  88                                 ^ colorConvParameter.hashCode() ^ (int) this.lastModified;
  89         }
  90
  91         @Override
  92         public int hashCode() {
  93                 return this.hashCode;
  94         }
  95
  96         @Override
  97         public boolean equals(Object obj) {
  98                 if (obj == this) {
  99                         return true;
 100                 }
 101                 if (obj != null && obj instanceof ColorConvertedImageKey) {
 102                         ColorConvertedImageKey other = (ColorConvertedImageKey) obj;
 103                         return lastModified == other.lastModified
 104                                         && imageResource.equals(other.imageResource)
 105                                         && colorConvParameter.equals(other.colorConvParameter);
 106                 }
 107                 return false;
 108         }
 109 }