private void dropUnregisteredIndices() {
final Set<String> indicesToDrop =
new HashSet<String>(
myPreviouslyRegistered != null
? myPreviouslyRegistered.registeredIndices
: Collections.<String>emptyList());
for (ID<?, ?> key : myIndices.keySet()) {
indicesToDrop.remove(key.toString());
}
for (String s : indicesToDrop) {
FileUtil.delete(IndexInfrastructure.getIndexRootDir(ID.create(s)));
}
}
public static boolean canHaveStub(@NotNull VirtualFile file) {
final FileType fileType = file.getFileType();
if (fileType instanceof LanguageFileType) {
Language l = ((LanguageFileType) fileType).getLanguage();
ParserDefinition parserDefinition = LanguageParserDefinitions.INSTANCE.forLanguage(l);
if (parserDefinition == null) return false;
final IFileElementType elementType = parserDefinition.getFileNodeType();
return elementType instanceof IStubFileElementType
&& (((IStubFileElementType) elementType).shouldBuildStubFor(file)
|| IndexingStamp.isFileIndexed(
file, INDEX_ID, IndexInfrastructure.getIndexCreationStamp(INDEX_ID)));
}
if (fileType.isBinary()) {
final BinaryFileStubBuilder builder = BinaryFileStubBuilders.INSTANCE.forFileType(fileType);
return builder != null && builder.acceptsFile(file);
}
return false;
}
private <K> boolean registerIndexer(
final StubIndexExtension<K, ?> extension, final boolean forceClean) throws IOException {
final StubIndexKey<K, ?> indexKey = extension.getKey();
final int version = extension.getVersion();
myIndexIdToVersionMap.put(indexKey, version);
final File versionFile = IndexInfrastructure.getVersionFile(indexKey);
final boolean versionFileExisted = versionFile.exists();
final File indexRootDir = IndexInfrastructure.getIndexRootDir(indexKey);
boolean needRebuild = false;
if (forceClean || IndexInfrastructure.versionDiffers(versionFile, version)) {
final String[] children = indexRootDir.list();
// rebuild only if there exists what to rebuild
needRebuild = !forceClean && (versionFileExisted || children != null && children.length > 0);
if (needRebuild) {
LOG.info(
"Version has changed for stub index "
+ extension.getKey()
+ ". The index will be rebuilt.");
}
FileUtil.delete(indexRootDir);
IndexInfrastructure.rewriteVersion(versionFile, version);
}
for (int attempt = 0; attempt < 2; attempt++) {
try {
final MapIndexStorage<K, TIntArrayList> storage =
new MapIndexStorage<K, TIntArrayList>(
IndexInfrastructure.getStorageFile(indexKey),
extension.getKeyDescriptor(),
new StubIdExternalizer(),
2 * 1024);
final MemoryIndexStorage<K, TIntArrayList> memStorage =
new MemoryIndexStorage<K, TIntArrayList>(storage);
myIndices.put(indexKey, new MyIndex<K>(memStorage));
break;
} catch (IOException e) {
LOG.info(e);
needRebuild = true;
FileUtil.delete(indexRootDir);
IndexInfrastructure.rewriteVersion(versionFile, version);
}
}
return needRebuild;
}