/**
* Create a new loading task. This task is meant to be executed concurrently. It will request the
* required textures from the parent texture manager once the loading is progressed to this point.
*
* @param parserFactory the parser factory
* @param atlasName the name of the atlas files
* @param textureManager the parent texture manager
* @param progressMonitor the monitor of the loading progress
* @param taskExecutor the executor that takes care for executing further tasks.
*/
public TextureAtlasListXmlLoadingTask(
@Nonnull final XmlPullParserFactory parserFactory,
@Nonnull final String atlasName,
@Nonnull final AbstractTextureManager<T> textureManager,
@Nonnull final ProgressMonitor progressMonitor,
@Nullable final Executor taskExecutor) {
this.parserFactory = parserFactory;
this.atlasName = atlasName;
this.textureManager = textureManager;
this.progressMonitor = progressMonitor;
this.taskExecutor = taskExecutor;
done = false;
progressMonitor.setProgress(0.f);
}
@Override
public void run() {
InputStream xmlStream = null;
try {
final XmlPullParser parser = parserFactory.newPullParser();
final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
xmlStream = classLoader.getResourceAsStream(atlasName + "-atlas.xml");
parser.setInput(xmlStream, "UTF-8");
int currentEvent = parser.nextTag();
int expectedAtlasCount = 0;
@Nullable TextureAtlasFinalizeTask<T> currentTextureTask = null;
while (currentEvent != XmlPullParser.END_DOCUMENT) {
if (currentEvent == XmlPullParser.START_TAG) {
final String tagName = parser.getName();
switch (tagName) {
case "atlasList":
expectedAtlasCount = getExpectedAtlasCount(parser, expectedAtlasCount);
if (expectedAtlasCount > 0) {
progressMonitor.setWeight(expectedAtlasCount);
}
break;
case "atlas":
@Nullable final String currentAtlasName = getAtlasTextureName(parser);
if (currentAtlasName != null) {
final FutureTask<T> preLoadTask =
new FutureTask<>(
new TextureAtlasPreLoadTask<>(textureManager, currentAtlasName));
if (taskExecutor == null) {
preLoadTask.run();
} else {
taskExecutor.execute(preLoadTask);
}
final float progressToAdd =
(expectedAtlasCount == 0) ? 0.f : (1.f / expectedAtlasCount);
currentTextureTask =
new TextureAtlasFinalizeTask<>(
preLoadTask,
currentAtlasName,
textureManager,
progressMonitor,
progressToAdd);
}
break;
case "sprite":
if (currentTextureTask != null) {
transferSpriteData(parser, currentTextureTask);
}
break;
}
} else if (currentEvent == XmlPullParser.END_TAG) {
final String tagName = parser.getName();
if ("atlas".equals(tagName)) {
if (currentTextureTask != null) {
textureManager.addUpdateTask(currentTextureTask);
textureManager.addLoadingTask(currentTextureTask);
currentTextureTask = null;
}
} else if ("atlasList".equals(tagName)) {
break;
}
}
currentEvent = parser.nextTag();
}
} catch (@Nonnull final XmlPullParserException e) {
LOGGER.error("Failed to load requested texture atlas: " + atlasName, e);
} catch (@Nonnull final IOException e) {
LOGGER.error("Reading error while loading texture atlas: " + atlasName, e);
} finally {
done = true;
if (xmlStream != null) {
try {
xmlStream.close();
} catch (@Nonnull final IOException ignored) {
}
}
}
}