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HADOOP-6150. Users should be able to instantiate comparator using TFile

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API. (Hong Tang via rangadi)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@797274 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Raghu Angadi 2009-07-24 00:11:20 +00:00
parent 53c127013c
commit e4450e5487
2 changed files with 15 additions and 1 deletions
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3
CHANGES.txt
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@ -891,6 +891,9 @@ Trunk (unreleased changes)
HADOOP-6132. RPC client create an extra connection because of incorrect HADOOP-6132. RPC client create an extra connection because of incorrect
key for connection cache. (Kan Zhang via rangadi) key for connection cache. (Kan Zhang via rangadi)
HADOOP-6150. Users should be able to instantiate comparator using TFile
API. (Hong Tang via rangadi)
Release 0.20.1 - Unreleased Release 0.20.1 - Unreleased
INCOMPATIBLE CHANGES INCOMPATIBLE CHANGES

13
src/java/org/apache/hadoop/io/file/tfile/TFile.java
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@ -161,6 +161,17 @@ static int getFSOutputBufferSize(Configuration conf) {
/** comparator prefix: java class */ /** comparator prefix: java class */
public static final String COMPARATOR_JCLASS = "jclass:"; public static final String COMPARATOR_JCLASS = "jclass:";
/**
* Make a raw comparator from a string name.
*
* @param name
* Comparator name
* @return A RawComparable comparator.
*/
static public Comparator<RawComparable> makeComparator(String name) {
return TFileMeta.makeComparator(name);
}
// Prevent the instantiation of TFiles // Prevent the instantiation of TFiles
private TFile() { private TFile() {
// nothing // nothing
@ -1947,7 +1958,7 @@ public TFileMeta(DataInput in) throws IOException {
} }
@SuppressWarnings("unchecked") @SuppressWarnings("unchecked")
private static BytesComparator makeComparator(String comparator) { static BytesComparator makeComparator(String comparator) {
if (comparator.length() == 0) { if (comparator.length() == 0) {
// unsorted keys // unsorted keys
return null; return null;