/**
* @return if given unqualified {@link SearchMatch} intersects with visibility range of {@link
* LocalElement}.
*/
protected static boolean isReferenceInLocalRange(
LocalElement localElement, SearchMatch reference) {
if (reference.isQualified()) {
return false;
}
Source localSource = localElement.getSource();
Source referenceSource = reference.getElement().getSource();
SourceRange localRange = localElement.getVisibleRange();
SourceRange referenceRange = reference.getSourceRange();
return Objects.equal(referenceSource, localSource) && referenceRange.intersects(localRange);
}
/**
* @return {@code true} if two given {@link Element}s are {@link LocalElement}s and have
* intersecting with visibility ranges.
*/
protected static boolean haveIntersectingRanges(LocalElement localElement, Element element) {
if (!(element instanceof LocalElement)) {
return false;
}
LocalElement localElement2 = (LocalElement) element;
Source localSource = localElement.getSource();
Source localSource2 = localElement2.getSource();
SourceRange localRange = localElement.getVisibleRange();
SourceRange localRange2 = localElement2.getVisibleRange();
return Objects.equal(localSource2, localSource)
&& localRange != null
&& localRange2 != null
&& localRange2.intersects(localRange);
}
private RefactoringStatus analyzePossibleConflicts(ProgressMonitor pm) {
pm.beginTask("Analyze possible conflicts", 1);
try {
final RefactoringStatus result = new RefactoringStatus();
// checks the resolved CompilationUnit(s)
Source unitSource = element.getSource();
Source[] librarySources = context.getLibrariesContaining(unitSource);
for (Source librarySource : librarySources) {
analyzePossibleConflicts_inLibrary(result, unitSource, librarySource);
}
pm.worked(1);
// done
return result;
} finally {
pm.done();
}
}
private void analyzePossibleConflicts_inLibrary(
final RefactoringStatus result, Source unitSource, Source librarySource) {
// prepare resolved unit
CompilationUnit unit = null;
try {
unit = context.resolveCompilationUnit(unitSource, librarySource);
} catch (AnalysisException e) {
}
if (unit == null) {
return;
}
// check for conflicts in the unit
final SourceRange elementRange = element.getVisibleRange();
unit.accept(
new RecursiveAstVisitor<Void>() {
@Override
public Void visitSimpleIdentifier(SimpleIdentifier node) {
Element nameElement = node.getBestElement();
if (nameElement != null && nameElement.getName().equals(newName)) {
// duplicate declaration
if (haveIntersectingRanges(element, nameElement)) {
String message =
MessageFormat.format(
"Duplicate local {0} ''{1}''.", getElementKindName(nameElement), newName);
result.addError(message, new RefactoringStatusContext(nameElement));
return null;
}
// shadowing referenced element
if (elementRange.contains(node.getOffset()) && !node.isQualified()) {
nameElement = HierarchyUtils.getSyntheticAccessorVariable(nameElement);
String nameElementSourceName = nameElement.getSource().getShortName();
String message =
MessageFormat.format(
"Usage of {0} ''{1}'' declared in ''{2}'' will be shadowed by renamed {3}.",
getElementKindName(nameElement),
getElementQualifiedName(nameElement),
nameElementSourceName,
getElementKindName(element));
result.addError(message, new RefactoringStatusContext(node));
}
}
return null;
}
});
}
@Override
public Change createChange(ProgressMonitor pm) throws Exception {
pm = checkProgressMonitor(pm);
SourceChangeManager changeManager = new SourceChangeManager();
// update declaration
{
Source source = element.getSource();
SourceChange change = changeManager.get(source);
addDeclarationEdit(change, element);
}
// update references
List<SearchMatch> refMatches = searchEngine.searchReferences(element, null, null);
List<SourceReference> references = getSourceReferences(refMatches);
for (SourceReference reference : references) {
SourceChange refChange = changeManager.get(reference.source);
addReferenceEdit(refChange, reference);
}
// prepare change
return new CompositeChange(getRefactoringName(), changeManager.getChanges());
}
@Override
public boolean shouldReportUnsafeRefactoringSource(AnalysisContext context, Source source) {
return element.getSource().equals(source);
}
