@Override
protected IStructureComparator createStructureComparator(final Object element,
final IDocument document0,
final ISharedDocumentAdapter sharedDocumentAdapter,
final IProgressMonitor monitor) throws CoreException {
IErlModule module = null;
final IErlModel model = ErlangEngine.getInstance().getModel();
String s = "";
IDocument document = document0;
if (element instanceof ResourceNode) {
final ResourceNode rn = (ResourceNode) element;
final IResource r = rn.getResource();
if (r instanceof IFile) {
final IFile f = (IFile) r;
final IErlElement e = model.findElement(r);
if (e instanceof IErlModule) {
module = (IErlModule) e;
}
if (document == null) {
try {
s = readString(f.getContents());
document = new Document(s);
} catch (final CoreException e1) {
}
}
}
} else if (document == null && element instanceof IStreamContentAccessor) {
try {
final InputStream contents = ((IStreamContentAccessor) element)
.getContents();
try {
s = readString(contents);
} finally {
try {
contents.close();
} catch (final IOException e) {
}
}
document = new Document(s);
} catch (final CoreException ex) {
}
} else if (document != null) {
s = document.get();
}
if (module == null) {
String name = "comptemp";
if (element instanceof ITypedElement) {
final ITypedElement typedElement = (ITypedElement) element;
name = typedElement.getName();
}
module = model.getModuleFromText(model, name, s, s);
}
ErlNode root = null;
if (element != null && document != null) {
try {
module.open(null);
root = new RootErlNode(document, element);
recursiveMakeErlNodes(module, root, document);
} catch (final ErlModelException e) {
ErlLogger.warn(e);
}