@Override
@Nullable
public Collection<PsiImportStatementBase> findRedundantImports(final PsiJavaFile file) {
final PsiImportList importList = file.getImportList();
if (importList == null) return null;
final PsiImportStatementBase[] imports = importList.getAllImportStatements();
if (imports.length == 0) return null;
Set<PsiImportStatementBase> allImports =
new THashSet<PsiImportStatementBase>(Arrays.asList(imports));
final Collection<PsiImportStatementBase> redundant;
if (FileTypeUtils.isInServerPageFile(file)) {
// remove only duplicate imports
redundant = ContainerUtil.newIdentityTroveSet();
ContainerUtil.addAll(redundant, imports);
redundant.removeAll(allImports);
for (PsiImportStatementBase importStatement : imports) {
if (importStatement instanceof JspxImportStatement
&& importStatement.isForeignFileImport()) {
redundant.remove(importStatement);
}
}
} else {
redundant = allImports;
final List<PsiFile> roots = file.getViewProvider().getAllFiles();
for (PsiElement root : roots) {
root.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitReferenceElement(PsiJavaCodeReferenceElement reference) {
if (!reference.isQualified()) {
final JavaResolveResult resolveResult = reference.advancedResolve(false);
if (!inTheSamePackage(file, resolveResult.getElement())) {
final PsiElement resolveScope = resolveResult.getCurrentFileResolveScope();
if (resolveScope instanceof PsiImportStatementBase) {
final PsiImportStatementBase importStatementBase =
(PsiImportStatementBase) resolveScope;
redundant.remove(importStatementBase);
}
}
}
super.visitReferenceElement(reference);
}
private boolean inTheSamePackage(PsiJavaFile file, PsiElement element) {
if (element instanceof PsiClass
&& ((PsiClass) element).getContainingClass() == null) {
final PsiFile containingFile = element.getContainingFile();
if (containingFile instanceof PsiJavaFile) {
return Comparing.strEqual(
file.getPackageName(), ((PsiJavaFile) containingFile).getPackageName());
}
}
return false;
}
});
}
}
return redundant;
}
@NotNull
private static Import importToImport(@NotNull PsiImportStatementBase i) {
PsiJavaCodeReferenceElement reference = i.getImportReference();
if (reference != null) {
return new Import(quoteKeywords(reference.getQualifiedName()) + (i.isOnDemand() ? ".*" : ""));
}
return new Import("");
}
public ASTNode getDefaultAnchor(
@NotNull PsiImportList list, @NotNull PsiImportStatementBase statement) {
PsiJavaCodeReferenceElement ref = statement.getImportReference();
if (ref == null) return null;
int entryIndex = findEntryIndex(statement);
PsiImportStatementBase[] allStatements = list.getAllImportStatements();
int[] entries = ArrayUtil.newIntArray(allStatements.length);
List<PsiImportStatementBase> statements = new ArrayList<PsiImportStatementBase>();
for (int i = 0; i < allStatements.length; i++) {
PsiImportStatementBase statement1 = allStatements[i];
int entryIndex1 = findEntryIndex(statement1);
entries[i] = entryIndex1;
if (entryIndex1 == entryIndex) {
statements.add(statement1);
}
}
if (statements.isEmpty()) {
int index;
for (index = entries.length - 1; index >= 0; index--) {
if (entries[index] < entryIndex) break;
}
index++;
return index < entries.length
? SourceTreeToPsiMap.psiElementToTree(allStatements[index])
: null;
} else {
String refText = ref.getCanonicalText();
if (statement.isOnDemand()) {
refText += ".";
}
PsiImportStatementBase insertBefore = null;
PsiImportStatementBase insertAfter = null;
for (PsiImportStatementBase statement1 : statements) {
PsiJavaCodeReferenceElement ref1 = statement1.getImportReference();
if (ref1 == null) {
continue;
}
String refTextThis = ref1.getCanonicalText();
if (statement1.isOnDemand()) {
refTextThis += ".";
}
int comp = Comparing.compare(refText, refTextThis);
if (comp < 0 && insertBefore == null) {
insertBefore = statement1;
}
if (comp > 0) {
insertAfter = statement1;
}
}
if (insertBefore != null) return insertBefore.getNode();
if (insertAfter != null) return insertAfter.getNode().getTreeNext();
return null;
}
}
public int findEntryIndex(@NotNull PsiImportStatementBase statement) {
PsiJavaCodeReferenceElement ref = statement.getImportReference();
if (ref == null) return -1;
String packageName;
if (statement.isOnDemand()) {
packageName = ref.getCanonicalText();
} else {
String className = ref.getCanonicalText();
packageName = getPackageOrClassName(className);
}
return findEntryIndex(packageName);
}
@Override
public void removeRedundantImports(@NotNull final PsiJavaFile file)
throws IncorrectOperationException {
final Collection<PsiImportStatementBase> redundant = findRedundantImports(file);
if (redundant == null) return;
for (final PsiImportStatementBase importStatement : redundant) {
final PsiJavaCodeReferenceElement ref = importStatement.getImportReference();
// Do not remove non-resolving refs
if (ref == null || ref.resolve() == null) {
continue;
}
importStatement.delete();
}
}
private static void addUnresolvedImportNames(
@NotNull Set<String> set,
@NotNull PsiJavaFile file,
@NotNull Set<String> namesToImportStaticly) {
PsiImportStatementBase[] imports = file.getImportList().getAllImportStatements();
for (PsiImportStatementBase anImport : imports) {
PsiJavaCodeReferenceElement ref = anImport.getImportReference();
if (ref == null) continue;
JavaResolveResult[] results = ref.multiResolve(false);
if (results.length == 0) {
String text = ref.getCanonicalText();
if (anImport.isOnDemand()) {
text += ".*";
}
if (anImport instanceof PsiImportStaticStatement) {
namesToImportStaticly.add(text);
}
set.add(text);
}
}
}