private Map<Album, Map<ImageType, Resource>> collectAlbumTargets(
Library library, final ResourceLocator resourceLocator, Collection<Album> changedAlbums) {
Map<Album, Map<ImageType, Resource>> result = new HashMap<>();
for (Album album : library.getAlbums()) {
Resource artworkAssetResource = album.artworkAssetResource();
if (artworkAssetResource != null) {
Map<ImageType, Resource> targets = new HashMap<ImageType, Resource>();
for (ImageType type : ImageType.values()) {
String imagePath = resourceLocator.getAlbumImagePath(album, type);
if (imagePath != null) {
Resource resource = resourceLocator.getResource(imagePath);
try {
if (changedAlbums.contains(album) || !resource.exists()) {
resource.getParent().mkdirs();
targets.put(type, resource);
}
} catch (IOException e) {
LOGGER.warning("Could not write image file: " + resource.getPath().toAbsolutePath());
}
}
}
if (!targets.isEmpty()) {
result.put(album, targets);
}
}
}
return result;
}
private void deleteIfExists(Resource imageResource) {
try {
if (imageResource.exists()) {
imageResource.delete();
}
} catch (IOException e) {
LOGGER.warning("Could not delete image file: " + imageResource.getPath().toAbsolutePath());
}
}
private void formatImages(BufferedImage image, Map<ImageType, Resource> targets) {
for (Map.Entry<ImageType, Resource> targetEntry : targets.entrySet()) {
ImageType imageType = targetEntry.getKey();
Resource imageResource = targetEntry.getValue();
try (OutputStream output = imageResource.getOutputStream()) {
writeImage(image, imageType, output);
} catch (IOException e) {
LOGGER.log(
Level.WARNING,
"Could not write image file: " + imageResource.getPath().toAbsolutePath(),
e);
deleteIfExists(imageResource);
}
}
}