/**
* Writes a file to disk to be read for hashing.
*
* @throws IOException
*/
public static void generateHashFunctions() throws IOException {
File hashFile = new File(hashFunctionsFileName);
if (!hashFile.exists()) {
ObjectOutputStream oos =
new ObjectOutputStream(new GZIPOutputStream(new FileOutputStream(hashFile)));
oos.writeInt(bits);
oos.writeInt(dimensions);
oos.writeInt(numFunctionBundles);
for (int c = 0; c < numFunctionBundles; c++) {
for (int i = 0; i < bits; i++) {
for (int j = 0; j < dimensions; j++) {
oos.writeFloat((float) (Math.random() * w - w / 2));
}
}
}
oos.close();
} else {
System.err.println(
"Hashes could not be written: " + hashFunctionsFileName + " already exists");
}
}
private void writeObject(ObjectOutputStream out) throws IOException {
out.writeShort(VERSION);
out.writeFloat(value);
}