private void pageToFileStream() throws IOException {
flush();
ByteArrayOutputStream bout = (ByteArrayOutputStream) currentStream;
tempFile = FileUtil.createTempFile("cos", ".tmp", strategy.getSpoolDirectory());
LOG.trace("Creating temporary stream cache file: {}", tempFile);
try {
currentStream = createOutputStream(tempFile);
bout.writeTo(currentStream);
} finally {
// ensure flag is flipped to file based
inMemory = false;
}
}
/** Creates a new {@link StreamCache} from the data cached in this {@link OutputStream}. */
public StreamCache newStreamCache() throws IOException {
flush();
if (inMemory) {
if (currentStream instanceof CachedByteArrayOutputStream) {
return ((CachedByteArrayOutputStream) currentStream).newInputStreamCache();
} else {
throw new IllegalStateException(
"CurrentStream should be an instance of CachedByteArrayOutputStream but is: "
+ currentStream.getClass().getName());
}
} else {
try {
if (fileInputStreamCache == null) {
fileInputStreamCache = new FileInputStreamCache(tempFile, ciphers);
}
return fileInputStreamCache;
} catch (FileNotFoundException e) {
throw new IOException("Cached file " + tempFile + " not found", e);
}
}
}