problem with bytewritable tostring
----------------------------------
Key: HADOOP-3449
URL: https://issues.apache.org/jira/browse/HADOOP-3449
Project: Hadoop Core
Issue Type: Bug
Reporter: kishore gopalakrishna
The BytesWritable toString method is not bidirectional. What it means is we
cannot get back the bytes from the toString form of bytesWritable. Here is the
snippet
public String toString() {
StringBuffer sb = new StringBuffer(3*size);
for (int idx = 0; idx < size; idx++) {
// if not the first, put a blank separator in
if (idx != 0) {
sb.append(' ');
}
*String num = Integer.toHexString((int) bytes[idx]);*
// if it is only one digit, add a leading 0.
if (num.length() < 2) {
sb.append('0');
}
sb.append(num);
}
return sb.toString();
}
This is not the correct way to convert byte to string. This works well for
positive numbers but fails for negative numbers
String num = Integer.toHexString((int) bytes[idx] && 0XFF);
http://forum.java.sun.com/thread.jspa?threadID=252591&messageID=2272668
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