// TODO Implementation pending
public Bucket readBucketFromFile(String path, Long offset, String datatype) {
// If offset is -1 , return null
// Since the bucket cannot be read.
if (offset == -1) return null;
RandomAccessFile raf;
Bucket temp = new Bucket(this.maxSize, (long) -1);
byte[] tempData = new byte[4];
byte[] tempOffsetAddress = new byte[8];
long tempOffset = 0;
Comparer comparer = new Comparer();
try {
raf = new RandomAccessFile(new File(path), "rw");
raf.seek(offset);
raf.read(tempData);
temp.maxSize = Helper.toInt(tempData);
raf.read(tempData);
temp.currentSize = Helper.toInt(tempData);
raf.read(tempData);
temp.numberOfOverflowBuckets = Helper.toInt(tempData);
raf.read(tempOffsetAddress);
temp.overflowOffset = Helper.toLong(tempOffsetAddress);
tempOffset = raf.getFilePointer();
raf.close();
for (int i = 0; i < this.maxSize; i++) {
if (datatype.contains("c")) {
temp.data[i][0] =
comparer.compare_functions[6].readString(
path, (int) tempOffset, Integer.parseInt(datatype.substring(1)));
} else
temp.data[i][0] =
comparer.compare_functions[comparer.mapper.indexOf(datatype)].readString(
path, (int) tempOffset, Integer.parseInt(datatype.substring(1)));
tempOffset += Integer.parseInt(datatype.substring(1));
temp.data[i][1] = comparer.compare_functions[3].readString(path, (int) tempOffset, 8);
tempOffset += 8;
}
return temp;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
