/**
* finds tasks that match the given pattern string
*
* @param patternString the pattern string, used to match tasks
* @param collector the collector that receives tasks
* @param resultsLimit the maximum number of tasks to find. Specifying a limit enables the index
* to be more efficient since it can skip over matching tasks that do not score highly enough.
* Specify {@link Integer#MAX_VALUE} if there should be no limit.
*/
public void find(String patternString, TaskCollector collector, int resultsLimit) {
Assert.isNotNull(patternString);
Assert.isNotNull(collector);
Assert.isTrue(resultsLimit > 0);
Lock readLock = indexReaderLock.readLock();
readLock.lock();
try {
IndexReader indexReader = getIndexReader();
if (indexReader != null) {
IndexSearcher indexSearcher = new IndexSearcher(indexReader);
try {
Query query = computeQuery(patternString);
TopDocs results = indexSearcher.search(query, resultsLimit);
for (ScoreDoc scoreDoc : results.scoreDocs) {
Document document = indexReader.document(scoreDoc.doc);
String taskIdentifier = document.get(FIELD_IDENTIFIER.getIndexKey());
AbstractTask task = taskList.getTask(taskIdentifier);
if (task != null) {
collector.collect(task);
}
}
} catch (IOException e) {
StatusHandler.log(
new Status(
IStatus.ERROR,
TasksIndexCore.ID_PLUGIN,
"Unexpected failure within task list index",
e)); //$NON-NLS-1$
} finally {
try {
indexSearcher.close();
} catch (IOException e) {
// ignore
}
}
}
} finally {
readLock.unlock();
}
}
