/**
* Images are normally fetched from storage or network only as needed, however if the download
* must start before the image is drawn this method can be invoked.
*/
public void fetch() {
if (fetching || imageData != null) {
return;
}
fetching = true;
try {
locked = super.isLocked();
if (storageFile != null) {
if (Storage.getInstance().exists(storageFile)) {
unlock();
imageData = new byte[Storage.getInstance().entrySize(storageFile)];
InputStream is = Storage.getInstance().createInputStream(storageFile);
Util.readFully(is, imageData);
resetCache();
fetching = false;
repaintImage = true;
return;
}
if (adapter != null) {
Util.downloadUrlToStorageInBackground(
url, storageFile + IMAGE_SUFFIX, new DownloadCompleted());
} else {
Util.downloadUrlToStorageInBackground(url, storageFile, new DownloadCompleted());
}
} else {
if (FileSystemStorage.getInstance().exists(fileSystemFile)) {
unlock();
imageData = new byte[(int) FileSystemStorage.getInstance().getLength(fileSystemFile)];
InputStream is = FileSystemStorage.getInstance().openInputStream(fileSystemFile);
Util.readFully(is, imageData);
resetCache();
fetching = false;
repaintImage = true;
return;
}
if (adapter != null) {
Util.downloadUrlToFileSystemInBackground(
url, fileSystemFile + IMAGE_SUFFIX, new DownloadCompleted());
} else {
Util.downloadUrlToFileSystemInBackground(
url, fileSystemFile + IMAGE_SUFFIX, new DownloadCompleted());
}
}
} catch (IOException ioErr) {
throw new RuntimeException(ioErr.toString());
}
}
public void actionPerformed(ActionEvent evt) {
if (adapter != null) {
try {
byte[] d;
InputStream is;
if (storageFile != null) {
d = new byte[Storage.getInstance().entrySize(storageFile + IMAGE_SUFFIX)];
is = Storage.getInstance().createInputStream(storageFile + IMAGE_SUFFIX);
} else {
d =
new byte
[(int)
FileSystemStorage.getInstance().getLength(fileSystemFile + IMAGE_SUFFIX)];
is = FileSystemStorage.getInstance().openInputStream(fileSystemFile + IMAGE_SUFFIX);
}
Util.readFully(is, d);
EncodedImage img = EncodedImage.create(d);
EncodedImage adapted;
if (adapter.isAsyncAdapter()) {
adapt = img;
Display.getInstance().invokeAndBlock(this);
adapted = adaptedIns;
adaptedIns = null;
adapt = null;
} else {
adapted = adapter.adaptImage(img, placeholder);
}
if (storageFile != null) {
OutputStream o = Storage.getInstance().createOutputStream(storageFile);
o.write(adapted.getImageData());
o.close();
Storage.getInstance().deleteStorageFile(storageFile + IMAGE_SUFFIX);
} else {
OutputStream o = FileSystemStorage.getInstance().openOutputStream(fileSystemFile);
o.write(adapted.getImageData());
o.close();
FileSystemStorage.getInstance().delete(fileSystemFile + IMAGE_SUFFIX);
}
} catch (IOException ex) {
ex.printStackTrace();
return;
}
}
fetching = false;
// invoke fetch again to load the local files
fetch();
}