@Override
public synchronized InputStream getWritebackFilter(
InputStream in, String key, int pos, final Callback<Boolean> complete) throws IOException {
validate(key);
DiskLruCacheEntry entry = lruEntries.get(key);
if (entry == null) {
entry = new DiskLruCacheEntry(this, key);
lruEntries.put(key, entry);
}
boolean readable = entry.isReadable();
InputStream wrapper = entry.getWritebackFilter(in, pos, complete);
// flush the index before creating files to prevent file leaks
if (wrapper != null) {
writeIndex(readable ? UPDATE : WRITE, entry);
return wrapper; //
}
return in;
}
