@Nullable
public final <T extends DomElement> DomFileElementImpl<T> getFileElement(XmlFile file) {
if (file == null) return null;
if (!(file.getFileType() instanceof DomSupportEnabled)) return null;
final VirtualFile virtualFile = file.getVirtualFile();
if (virtualFile != null && virtualFile.isDirectory()) return null;
return this.<T>getOrCreateCachedValueProvider(file).getFileElement();
}
private void processFileOrDirectoryChange(final VirtualFile file) {
if (!ProjectFileIndex.SERVICE.getInstance(myProject).isInContent(file)) return;
if (!file.isDirectory()) {
processFileChange(file);
} else {
processDirectoryChange(file);
}
}
private void processDirectoryChange(final VirtualFile directory) {
for (final VirtualFile file : directory.getChildren()) {
processFileOrDirectoryChange(file);
}
}
private void processFileChange(final VirtualFile file) {
if (StdFileTypes.XML != file.getFileType()) return;
processFileChange(getCachedPsiFile(file));
}