Classifier PriorityQueue returns erroneous results
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Key: MAHOUT-186
URL: https://issues.apache.org/jira/browse/MAHOUT-186
Project: Mahout
Issue Type: Bug
Affects Versions: 0.1, 0.2
Reporter: Robin Anil
Assignee: Robin Anil
Fix For: 0.2
A simple test fails
import org.apache.hadoop.util.PriorityQueue;
PriorityQueue<ClassifierResult> queue = new ClassifierResultPriorityQueue(3);
queue.insert(new ClassifierResult("label1", 5));
queue.insert(new ClassifierResult("label2", 4));
queue.insert(new ClassifierResult("label3", 3));
queue.insert(new ClassifierResult("label4", 2));
queue.insert(new ClassifierResult("label5", 1));
assertEquals("Incorrect Size", 3, queue.size());
log.info(queue.pop().toString());
log.info(queue.pop().toString());
log.info(queue.pop().toString());
09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest:
ClassifierResult{category='label3', score=3.0}
09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest:
ClassifierResult{category='label4', score=2.0}
09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest:
ClassifierResult{category='label5', score=1.0}
Expected label1 and label2 at the top
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