@NotNull
private static String get(@NotNull String type, @NotNull String subType) {
Util.checkNotNull(type, subType);
assert subType.length() > 0;
assert !subType.startsWith("/") && !subType.startsWith("\\");
return type + "/" + subType.toLowerCase(Locale.ENGLISH);
}
private ResultPage(
@NotNull List<ResultDocument> resultDocuments, int pageIndex, int pageCount, int hitCount) {
this.resultDocuments = Util.checkNotNull(resultDocuments);
this.pageIndex = pageIndex;
this.pageCount = pageCount;
this.hitCount = hitCount;
}
public Path(@NotNull String path) {
Util.checkNotNull(path);
this.path = normalizePath(path);
this.canonicalFile = getCanonicalFile();
/*
* If the file is a root, such as '/' or 'C:', then File.getName() will
* return an empty string. In that case, use toString() instead, which
* will return '/' and 'C:', respectively. We don't want an empty string
* as name because it will be used for display on the GUI.
*/
this.name = getDisplayName(canonicalFile);
}
// Given deletions should not be in the registry anymore, since the receiver
// will retrieve a fresh set of indexes from the registry before approval
@ThreadSafe
@VisibleForPackageGroup
public void approveDeletions(@NotNull List<PendingDeletion> deletions) {
Util.checkNotNull(deletions);
if (deletions.isEmpty()) return;
/*
* If the deletion thread is not available anymore, approve of deletions
* immediately. - Otherwise the given deletion objects would just hang
* around in the queue until program shutdown and never receive
* approval, thus the associated indexes would never get deleted.
*/
synchronized (this) {
if (deletionThread.isInterrupted()) {
for (PendingDeletion pendingDeletion : deletions) pendingDeletion.setApprovedBySearcher();
} else {
deletionQueue.add(deletions);
}
}
}
// Caller must close returned searcher
@NotNull
@NotThreadSafe
private List<CorruptedIndex> setLuceneSearcher(@NotNull List<LuceneIndex> indexes)
throws IOException {
this.indexes = Util.checkNotNull(indexes);
Searchable[] searchables = new Searchable[indexes.size()];
LazyList<CorruptedIndex> corrupted = new LazyList<CorruptedIndex>();
for (int i = 0; i < indexes.size(); i++) {
LuceneIndex index = indexes.get(i);
try {
searchables[i] = new IndexSearcher(index.getLuceneDir());
} catch (IOException e) {
Util.printErr(e);
searchables[i] = new DummySearchable();
corrupted.add(new CorruptedIndex(index, e));
}
}
luceneSearcher = new MultiSearcher(searchables);
return corrupted;
}
private QueryWrapper(@NotNull Query query, boolean isPhraseQuery) {
this.query = Util.checkNotNull(query);
this.isPhraseQuery = isPhraseQuery;
}
/**
* For the given query, returns the requested page of results. This method should not be called
* anymore after {@link #shutdown()} has been called, otherwise an IOException will be thrown.
*/
@NotNull
@ThreadSafe
public ResultPage search(@NotNull WebQuery webQuery)
throws IOException, SearchException, CheckedOutOfMemoryError {
Util.checkNotNull(webQuery);
if (ioException != null) throw ioException;
List<Filter> filters = new ArrayList<Filter>(3);
// Add size filter to filter chain
if (webQuery.minSize != null || webQuery.maxSize != null) {
filters.add(
NumericRangeFilter.newLongRange(
Fields.SIZE.key(), webQuery.minSize, webQuery.maxSize, true, true));
}
// Add type filter to filter chain
if (webQuery.parsers != null) {
TermsFilter typeFilter = new TermsFilter();
String fieldName = Fields.PARSER.key();
typeFilter.addTerm(new Term(fieldName, Fields.EMAIL_PARSER));
for (Parser parser : webQuery.parsers) {
String parserName = parser.getClass().getSimpleName();
typeFilter.addTerm(new Term(fieldName, parserName));
}
filters.add(typeFilter);
}
// Add location filter to filter chain
if (webQuery.indexes != null) {
Filter[] indexFilters = new Filter[webQuery.indexes.size()];
int i = 0;
for (LuceneIndex index : webQuery.indexes) {
Path path = index.getRootFolder().getPath();
String uid = index.getDocumentType().createUniqueId(path);
Term prefix = new Term(Fields.UID.key(), uid + "/");
indexFilters[i++] = new PrefixFilter(prefix);
}
filters.add(new ChainedFilter(indexFilters, ChainedFilter.OR));
}
// Construct filter chain
Filter filter =
filters.size() == 0
? null
: new ChainedFilter(filters.toArray(new Filter[filters.size()]), ChainedFilter.AND);
// Create query
QueryWrapper queryWrapper = createQuery(webQuery.query);
Query query = queryWrapper.query;
boolean isPhraseQuery = queryWrapper.isPhraseQuery;
readLock.lock();
try {
checkIndexesExist();
// Perform search; might throw OutOfMemoryError
int maxResults = (webQuery.pageIndex + 1) * PAGE_SIZE;
TopDocs topDocs = luceneSearcher.search(query, filter, maxResults);
ScoreDoc[] scoreDocs = topDocs.scoreDocs;
// Compute start and end indices of returned page
int start;
int end = scoreDocs.length;
if (end <= PAGE_SIZE) {
start = 0;
} else {
int r = end % PAGE_SIZE;
start = end - (r == 0 ? PAGE_SIZE : r);
}
// Create and fill list of result documents to return
ResultDocument[] results = new ResultDocument[end - start];
for (int i = start; i < end; i++) {
Document doc = luceneSearcher.doc(scoreDocs[i].doc);
float score = scoreDocs[i].score;
LuceneIndex index = indexes.get(luceneSearcher.subSearcher(i));
IndexingConfig config = index.getConfig();
results[i - start] =
new ResultDocument(
doc, score, query, isPhraseQuery, config, fileFactory, outlookMailFactory);
}
int hitCount = topDocs.totalHits;
int newPageIndex = start / PAGE_SIZE;
int pageCount = (int) Math.ceil((float) hitCount / PAGE_SIZE);
return new ResultPage(Arrays.asList(results), newPageIndex, pageCount, hitCount);
} catch (IllegalArgumentException e) {
throw wrapEmptyIndexException(e);
} catch (OutOfMemoryError e) {
throw new CheckedOutOfMemoryError(e);
} finally {
readLock.unlock();
}
}
/**
* This method should not be called by clients. Use {@link IndexRegistry#getSearcher()} instead.
*
* @param corruptedIndexes A list that will be filled by this constructor with indexes that
* couldn't be loaded.
*/
@VisibleForPackageGroup
public Searcher(
@NotNull IndexRegistry indexRegistry,
@NotNull FileFactory fileFactory,
@NotNull OutlookMailFactory outlookMailFactory,
@NotNull final List<CorruptedIndex> corruptedIndexes)
throws IOException {
Util.checkNotNull(indexRegistry, fileFactory, outlookMailFactory);
this.indexRegistry = indexRegistry;
this.fileFactory = fileFactory;
this.outlookMailFactory = outlookMailFactory;
readLock = indexRegistry.getReadLock();
writeLock = indexRegistry.getWriteLock();
// Handler for index additions
addedListener =
new Event.Listener<LuceneIndex>() {
public void update(LuceneIndex eventData) {
replaceLuceneSearcher();
}
};
/*
* This lock could be moved into the indexes handler, but we'll put it
* here to avoid releasing and reacquiring it.
*/
writeLock.lock();
try {
indexRegistry.addListeners(
new ExistingIndexesHandler() {
// Handle existing indexes
public void handleExistingIndexes(List<LuceneIndex> indexes) {
try {
corruptedIndexes.addAll(setLuceneSearcher(indexes));
} catch (IOException e) {
ioException = e;
}
}
},
addedListener,
null); // removedListener is null, see deletion thread below
} finally {
writeLock.unlock();
}
if (ioException != null) throw ioException;
// Handler for index removals
deletionThread =
new Thread(Searcher.class.getName() + " (Approve pending deletions)") {
public void run() {
while (true) {
try {
List<PendingDeletion> deletions = deletionQueue.take();
replaceLuceneSearcher();
for (PendingDeletion deletion : deletions) deletion.setApprovedBySearcher();
} catch (InterruptedException e) {
break;
}
}
}
};
deletionThread.start();
}
public Attachment(@NotNull String filename, @NotNull FileResource fileResource) {
this.filename = Util.checkNotNull(filename);
this.fileResource = Util.checkNotNull(fileResource);
}
protected ComboEditSupport(@NotNull Class<EN> choiceClass) {
this.choiceClass = Util.checkNotNull(choiceClass);
}
