private void clearCache(IJavaProject project, Set<PackageFragmentRootData> toBeKept) {
Collection<PackageFragmentRootData> values;
synchronized (cachedPackageFragmentRootData) {
values = newArrayList(cachedPackageFragmentRootData.values());
}
List<PackageFragmentRootData> toBeRemoved = newArrayList();
for (PackageFragmentRootData data : values) {
if (toBeKept.contains(data)) {
continue;
}
// create a copy of the known associated roots to avoid concurrent modification
// and conflicts with other readers
Map<String, IPackageFragmentRoot> copy = newLinkedHashMap(data.associatedRoots);
Iterator<IPackageFragmentRoot> i = copy.values().iterator();
IPackageFragmentRoot someRoot = null;
boolean didChange = false;
while (i.hasNext()) {
IPackageFragmentRoot root = i.next();
if (project.equals(root.getJavaProject())) {
i.remove();
didChange = true;
} else if (someRoot == null) {
someRoot = root;
}
}
if (copy.size() == 0) {
toBeRemoved.add(data);
} else if (didChange) {
// get rid of cached storages that still point to roots / projects that are no longer
// available
// and recompute them lazily on demand
data.associatedRoots = copy;
final IPackageFragmentRoot rootToProcess = someRoot;
data.uri2Storage =
new ForwardingMap<URI, IStorage>() {
Map<URI, IStorage> delegate;
@Override
protected Map<URI, IStorage> delegate() {
if (delegate == null) {
PackageFragmentRootData newlyCollected = initializeData(rootToProcess);
return delegate = newlyCollected.uri2Storage;
}
return delegate;
}
};
}
}
if (!toBeRemoved.isEmpty()) {
synchronized (cachedPackageFragmentRootData) {
cachedPackageFragmentRootData.values().removeAll(toBeRemoved);
}
}
}
/* @NonNull */
@Override
public Iterable<Pair<IStorage, IProject>> getStorages(/* @NonNull */ URI uri) {
List<Pair<IStorage, IProject>> result = newArrayListWithCapacity(1);
List<PackageFragmentRootData> packageFragmentRootDatas;
synchronized (cachedPackageFragmentRootData) {
packageFragmentRootDatas = newArrayList(cachedPackageFragmentRootData.values());
}
Iterator<PackageFragmentRootData> iterator = packageFragmentRootDatas.iterator();
while (iterator.hasNext()) {
PackageFragmentRootData data = iterator.next();
if (data.exists()) {
if (data.uriPrefix == null || uri.toString().startsWith(data.uriPrefix.toString())) {
IStorage storage = data.uri2Storage.get(uri);
if (storage != null) {
for (IPackageFragmentRoot root : data.associatedRoots.values()) {
result.add(Tuples.create(storage, root.getJavaProject().getProject()));
}
}
}
} else {
iterator.remove();
}
}
if (result.isEmpty() && uri.isArchive()) {
String authority = uri.authority();
authority = authority.substring(0, authority.length() - 1);
URI archiveURI = URI.createURI(authority);
if (archiveURI.isFile() || archiveURI.isPlatformResource()) {
IPath archivePath =
new Path(
archiveURI.isPlatformResource()
? archiveURI.toPlatformString(true)
: archiveURI.toFileString());
for (PackageFragmentRootData data : packageFragmentRootDatas) {
if (data.uriPrefix != null && archivePath.equals(data.getPath())) {
// prefixes have an empty last segment.
URI prefix =
data.uriPrefix.lastSegment().length() == 0
? data.uriPrefix.trimSegments(1)
: data.uriPrefix;
URI expectedURI = prefix.appendSegments(uri.segments());
IStorage storage = data.uri2Storage.get(expectedURI);
if (storage != null) {
for (IPackageFragmentRoot root : data.associatedRoots.values()) {
result.add(Tuples.create(storage, root.getJavaProject().getProject()));
}
}
}
}
}
}
return result;
}
/** @since 2.4 */
protected PackageFragmentRootData initializeData(final IPackageFragmentRoot root) {
final PackageFragmentRootData data =
new PackageFragmentRootData(computeModificationStamp(root));
data.addRoot(root);
try {
final SourceAttachmentPackageFragmentRootWalker<Void> walker =
new SourceAttachmentPackageFragmentRootWalker<Void>() {
@Override
protected URI getURI(
IFile file,
org.eclipse.xtext.ui.resource.PackageFragmentRootWalker.TraversalState state) {
if (!uriValidator.isPossiblyManaged(file)) return null;
return super.getURI(file, state);
}
@Override
protected URI getURI(
IJarEntryResource jarEntry,
org.eclipse.xtext.ui.resource.PackageFragmentRootWalker.TraversalState state) {
if (!uriValidator.isPossiblyManaged(jarEntry)) return null;
final URI uri = locator.getURI(root, jarEntry, state);
if (!uriValidator.isValid(uri, jarEntry)) return null;
return uri;
}
@Override
protected Void handle(
URI uri,
IStorage storage,
org.eclipse.xtext.ui.resource.PackageFragmentRootWalker.TraversalState state) {
data.uri2Storage.put(uri, storage);
return null;
}
};
walker.traverse(root, false);
if (walker.getBundleSymbolicName() != null)
data.uriPrefix = URI.createPlatformResourceURI(walker.getBundleSymbolicName() + "/", true);
} catch (RuntimeException e) {
log.error(e.getMessage(), e);
} catch (JavaModelException e) {
log.debug(e.getMessage(), e);
}
return data;
}
private PackageFragmentRootData getCachedData(IPackageFragmentRoot root) {
final String path = root.getPath().toString();
synchronized (cachedPackageFragmentRootData) {
if (cachedPackageFragmentRootData.containsKey(path)) {
final PackageFragmentRootData data = cachedPackageFragmentRootData.get(path);
if (isUpToDate(data, root)) {
data.addRoot(root);
return data;
} else {
cachedPackageFragmentRootData.remove(path);
}
}
}
PackageFragmentRootData data = initializeData(root);
synchronized (cachedPackageFragmentRootData) {
cachedPackageFragmentRootData.put(path, data);
}
return data;
}