@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 File fileToFile(PsiJavaFile javaFile, List<String> additionalImports) {
PsiImportList importList = javaFile.getImportList();
List<Import> imports =
importList == null
? Collections.<Import>emptyList()
: importsToImportList(importList.getAllImportStatements());
for (String i : additionalImports) imports.add(new Import(i));
return new File(
quoteKeywords(javaFile.getPackageName()),
imports,
classesToClassList(javaFile.getClasses()),
createMainFunction(javaFile));
}
public static boolean isStaticallyImported(
@NotNull PsiMember member, @NotNull PsiElement context) {
final PsiClass memberClass = member.getContainingClass();
if (memberClass == null) {
return false;
}
final PsiClass containingClass = PsiTreeUtil.getParentOfType(context, PsiClass.class);
if (InheritanceUtil.isInheritorOrSelf(containingClass, memberClass, true)) {
return false;
}
final PsiFile psiFile = context.getContainingFile();
if (!(psiFile instanceof PsiJavaFile)) {
return false;
}
final PsiJavaFile javaFile = (PsiJavaFile) psiFile;
final PsiImportList importList = javaFile.getImportList();
if (importList == null) {
return false;
}
final String memberName = member.getName();
if (memberName == null) {
return false;
}
final PsiImportStatementBase existingImportStatement =
importList.findSingleImportStatement(memberName);
if (existingImportStatement instanceof PsiImportStaticStatement) {
final PsiClass importClass =
((PsiImportStaticStatement) existingImportStatement).resolveTargetClass();
if (InheritanceUtil.isInheritorOrSelf(importClass, memberClass, true)) {
return true;
}
}
final String memberClassName = memberClass.getQualifiedName();
if (memberClassName == null) {
return false;
}
final PsiImportStaticStatement onDemandImportStatement =
findOnDemandImportStaticStatement(importList, memberClassName);
if (onDemandImportStatement != null) {
if (!hasOnDemandImportStaticConflict(memberClassName, memberName, context)) {
return true;
}
}
return false;
}
public static void addImportIfNeeded(@NotNull PsiClass aClass, @NotNull PsiElement context) {
final PsiFile file = context.getContainingFile();
if (!(file instanceof PsiJavaFile)) {
return;
}
final PsiJavaFile javaFile = (PsiJavaFile) file;
final PsiClass outerClass = aClass.getContainingClass();
if (outerClass == null) {
if (PsiTreeUtil.isAncestor(javaFile, aClass, true)) {
return;
}
} else if (PsiTreeUtil.isAncestor(outerClass, context, true)) {
final PsiElement brace = outerClass.getLBrace();
if (brace != null && brace.getTextOffset() < context.getTextOffset()) {
return;
}
}
final String qualifiedName = aClass.getQualifiedName();
if (qualifiedName == null) {
return;
}
final PsiImportList importList = javaFile.getImportList();
if (importList == null) {
return;
}
final String containingPackageName = javaFile.getPackageName();
@NonNls final String packageName = ClassUtil.extractPackageName(qualifiedName);
if (containingPackageName.equals(packageName)
|| importList.findSingleClassImportStatement(qualifiedName) != null) {
return;
}
if (importList.findOnDemandImportStatement(packageName) != null
&& !hasDefaultImportConflict(qualifiedName, javaFile)
&& !hasOnDemandImportConflict(qualifiedName, javaFile)) {
return;
}
final Project project = importList.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiElementFactory elementFactory = psiFacade.getElementFactory();
final PsiImportStatement importStatement = elementFactory.createImportStatement(aClass);
importList.add(importStatement);
}
/**
* @param strict if strict is true this method checks if the conflicting class which is imported
* is actually used in the file. If it isn't the on demand import can be overridden with an
* exact import for the fqName without breaking stuff.
*/
private static boolean hasOnDemandImportConflict(
@NotNull String fqName, @NotNull PsiJavaFile file, boolean strict) {
final PsiImportList imports = file.getImportList();
if (imports == null) {
return false;
}
final PsiImportStatement[] importStatements = imports.getImportStatements();
final String shortName = ClassUtil.extractClassName(fqName);
final String packageName = ClassUtil.extractPackageName(fqName);
for (final PsiImportStatement importStatement : importStatements) {
if (!importStatement.isOnDemand()) {
continue;
}
final PsiJavaCodeReferenceElement importReference = importStatement.getImportReference();
if (importReference == null) {
continue;
}
final String packageText = importReference.getText();
if (packageText.equals(packageName)) {
continue;
}
final PsiElement element = importReference.resolve();
if (!(element instanceof PsiPackage)) {
continue;
}
final PsiPackage aPackage = (PsiPackage) element;
if (!strict && aPackage.containsClassNamed(shortName)) {
return true;
} else {
final PsiClass[] classes = aPackage.findClassByShortName(shortName, file.getResolveScope());
for (final PsiClass aClass : classes) {
final String qualifiedClassName = aClass.getQualifiedName();
if (qualifiedClassName == null || fqName.equals(qualifiedClassName)) {
continue;
}
return containsConflictingReference(file, qualifiedClassName);
}
}
}
return hasJavaLangImportConflict(fqName, file);
}
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);
}
}
}
private static boolean hasExactImportConflict(String fqName, PsiJavaFile file) {
final PsiImportList imports = file.getImportList();
if (imports == null) {
return false;
}
final PsiImportStatement[] importStatements = imports.getImportStatements();
final int lastDotIndex = fqName.lastIndexOf((int) '.');
final String shortName = fqName.substring(lastDotIndex + 1);
final String dottedShortName = '.' + shortName;
for (final PsiImportStatement importStatement : importStatements) {
if (importStatement.isOnDemand()) {
continue;
}
final String importName = importStatement.getQualifiedName();
if (importName == null) {
return false;
}
if (!importName.equals(fqName) && importName.endsWith(dottedShortName)) {
return true;
}
}
return false;
}
private static boolean hasExactImportStaticConflict(
String qualifierClass, String memberName, PsiElement context) {
final PsiFile file = context.getContainingFile();
if (!(file instanceof PsiJavaFile)) {
return false;
}
final PsiJavaFile javaFile = (PsiJavaFile) file;
final PsiImportList importList = javaFile.getImportList();
if (importList == null) {
return false;
}
final PsiImportStaticStatement[] importStaticStatements =
importList.getImportStaticStatements();
for (PsiImportStaticStatement importStaticStatement : importStaticStatements) {
if (importStaticStatement.isOnDemand()) {
continue;
}
final String name = importStaticStatement.getReferenceName();
if (!memberName.equals(name)) {
continue;
}
final PsiJavaCodeReferenceElement importReference =
importStaticStatement.getImportReference();
if (importReference == null) {
continue;
}
final PsiElement qualifier = importReference.getQualifier();
if (qualifier == null) {
continue;
}
final String qualifierText = qualifier.getText();
if (!qualifierClass.equals(qualifierText)) {
return true;
}
}
return false;
}
private static boolean hasOnDemandImportStaticConflict(
String fqName, String memberName, PsiElement context, boolean strict) {
final PsiFile file = context.getContainingFile();
if (!(file instanceof PsiJavaFile)) {
return false;
}
final PsiJavaFile javaFile = (PsiJavaFile) file;
final PsiImportList importList = javaFile.getImportList();
if (importList == null) {
return false;
}
final PsiImportStaticStatement[] importStaticStatements =
importList.getImportStaticStatements();
for (PsiImportStaticStatement importStaticStatement : importStaticStatements) {
if (!importStaticStatement.isOnDemand()) {
continue;
}
final PsiClass targetClass = importStaticStatement.resolveTargetClass();
if (targetClass == null) {
continue;
}
final String name = targetClass.getQualifiedName();
if (fqName.equals(name)) {
continue;
}
final PsiField field = targetClass.findFieldByName(memberName, true);
if (field != null && (!strict || memberReferenced(field, javaFile))) {
return true;
}
final PsiMethod[] methods = targetClass.findMethodsByName(memberName, true);
if (methods.length > 0 && (!strict || membersReferenced(methods, javaFile))) {
return true;
}
}
return false;
}
public static boolean addStaticImport(
@NotNull String qualifierClass,
@NonNls @NotNull String memberName,
@NotNull PsiElement context) {
if (!nameCanBeStaticallyImported(qualifierClass, memberName, context)) {
return false;
}
final PsiClass containingClass = PsiTreeUtil.getParentOfType(context, PsiClass.class);
if (InheritanceUtil.isInheritor(containingClass, qualifierClass)) {
return true;
}
final PsiFile psiFile = context.getContainingFile();
if (!(psiFile instanceof PsiJavaFile)) {
return false;
}
final PsiJavaFile javaFile = (PsiJavaFile) psiFile;
final PsiImportList importList = javaFile.getImportList();
if (importList == null) {
return false;
}
final PsiImportStatementBase existingImportStatement =
importList.findSingleImportStatement(memberName);
if (existingImportStatement != null) {
if (existingImportStatement instanceof PsiImportStaticStatement) {
final PsiImportStaticStatement importStaticStatement =
(PsiImportStaticStatement) existingImportStatement;
if (!memberName.equals(importStaticStatement.getReferenceName())) {
return false;
}
final PsiClass targetClass = importStaticStatement.resolveTargetClass();
return targetClass != null && qualifierClass.equals(targetClass.getQualifiedName());
}
return false;
}
final PsiImportStaticStatement onDemandImportStatement =
findOnDemandImportStaticStatement(importList, qualifierClass);
if (onDemandImportStatement != null
&& !hasOnDemandImportStaticConflict(qualifierClass, memberName, context)) {
return true;
}
final Project project = context.getProject();
final GlobalSearchScope scope = context.getResolveScope();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiClass aClass = psiFacade.findClass(qualifierClass, scope);
if (aClass == null) {
return false;
}
final String qualifiedName = aClass.getQualifiedName();
if (qualifiedName == null) {
return false;
}
final List<PsiImportStaticStatement> imports = getMatchingImports(importList, qualifiedName);
final int onDemandCount =
JavaCodeStyleSettingsFacade.getInstance(project).getNamesCountToUseImportOnDemand();
final PsiElementFactory elementFactory = psiFacade.getElementFactory();
if (imports.size() < onDemandCount) {
importList.add(elementFactory.createImportStaticStatement(aClass, memberName));
} else {
for (PsiImportStaticStatement importStatement : imports) {
importStatement.delete();
}
importList.add(elementFactory.createImportStaticStatement(aClass, "*"));
}
return true;
}
public PsiImportList prepareOptimizeImportsResult(@NotNull final PsiJavaFile file) {
CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(file.getProject());
final Set<String> namesToImportStaticly = new THashSet<String>();
String[] names =
collectNamesToImport(
file,
namesToImportStaticly); // Note: this array may contain "<packageOrClassName>.*" for
// unresolved imports!
Arrays.sort(names);
ArrayList<String> namesList = new ArrayList<String>();
ImportLayoutTable table = mySettings.IMPORT_LAYOUT_TABLE;
if (table != null) {
int[] entriesForName = ArrayUtil.newIntArray(names.length);
for (int i = 0; i < names.length; i++) {
entriesForName[i] = findEntryIndex(names[i]);
}
Entry[] entries = table.getEntries();
for (int i = 0; i < entries.length; i++) {
Entry entry = entries[i];
if (entry instanceof PackageEntry) {
for (int j = 0; j < names.length; j++) {
if (entriesForName[j] == i) {
namesList.add(names[j]);
names[j] = null;
}
}
}
}
}
for (String name : names) {
if (name != null) namesList.add(name);
}
names = ArrayUtil.toStringArray(namesList);
TObjectIntHashMap<String> packageToCountMap = new TObjectIntHashMap<String>();
TObjectIntHashMap<String> classToCountMap = new TObjectIntHashMap<String>();
for (String name : names) {
String packageOrClassName = getPackageOrClassName(name);
if (packageOrClassName.length() == 0) continue;
if (namesToImportStaticly.contains(name)) {
int count = classToCountMap.get(packageOrClassName);
classToCountMap.put(packageOrClassName, count + 1);
} else {
int count = packageToCountMap.get(packageOrClassName);
packageToCountMap.put(packageOrClassName, count + 1);
}
}
final Set<String> classesOrPackagesToImportOnDemand = new THashSet<String>();
class MyVisitorProcedure implements TObjectIntProcedure<String> {
private final boolean myIsVisitingPackages;
MyVisitorProcedure(boolean isVisitingPackages) {
myIsVisitingPackages = isVisitingPackages;
}
public boolean execute(final String packageOrClassName, final int count) {
if (isToUseImportOnDemand(packageOrClassName, count, !myIsVisitingPackages)) {
classesOrPackagesToImportOnDemand.add(packageOrClassName);
}
return true;
}
}
classToCountMap.forEachEntry(new MyVisitorProcedure(false));
packageToCountMap.forEachEntry(new MyVisitorProcedure(true));
Set<String> classesToUseSingle =
findSingleImports(file, names, classesOrPackagesToImportOnDemand, namesToImportStaticly);
try {
final String text =
buildImportListText(
names, classesOrPackagesToImportOnDemand, classesToUseSingle, namesToImportStaticly);
String ext = StdFileTypes.JAVA.getDefaultExtension();
final PsiJavaFile dummyFile =
(PsiJavaFile)
PsiFileFactory.getInstance(file.getProject())
.createFileFromText("_Dummy_." + ext, StdFileTypes.JAVA, text);
codeStyleManager.reformat(dummyFile);
PsiImportList resultList = dummyFile.getImportList();
PsiImportList oldList = file.getImportList();
if (oldList.isReplaceEquivalent(resultList)) return null;
return resultList;
} catch (IncorrectOperationException e) {
LOG.error(e);
return null;
}
}
/**
* Adds import if it is needed.
*
* @return false when the FQ-name have to be used in code (e.g. when conflicting imports already
* exist)
*/
public boolean addImport(@NotNull PsiJavaFile file, @NotNull PsiClass refClass) {
final JavaPsiFacade facade = JavaPsiFacade.getInstance(file.getProject());
PsiElementFactory factory = facade.getElementFactory();
PsiResolveHelper helper = facade.getResolveHelper();
String className = refClass.getQualifiedName();
if (className == null) return true;
String packageName = getPackageOrClassName(className);
String shortName = PsiNameHelper.getShortClassName(className);
PsiClass conflictSingleRef = findSingleImportByShortName(file, shortName);
if (conflictSingleRef != null) {
return className.equals(conflictSingleRef.getQualifiedName());
}
PsiClass curRefClass = helper.resolveReferencedClass(shortName, file);
if (file.getManager().areElementsEquivalent(refClass, curRefClass)) {
return true;
}
boolean useOnDemand = true;
if (packageName.length() == 0) {
useOnDemand = false;
}
PsiElement conflictPackageRef = findImportOnDemand(file, packageName);
if (conflictPackageRef != null) {
useOnDemand = false;
}
List<PsiElement> classesToReimport = new ArrayList<PsiElement>();
List<PsiJavaCodeReferenceElement> importRefs = getImportsFromPackage(file, packageName);
if (useOnDemand) {
if (mySettings.USE_SINGLE_CLASS_IMPORTS
&& importRefs.size() + 1 < mySettings.CLASS_COUNT_TO_USE_IMPORT_ON_DEMAND
&& !mySettings.PACKAGES_TO_USE_IMPORT_ON_DEMAND.contains(packageName)) {
useOnDemand = false;
}
// name of class we try to import is the same as of the class defined in this file
if (curRefClass != null) {
useOnDemand = true;
}
// check conflicts
if (useOnDemand) {
PsiElement[] onDemandRefs = file.getOnDemandImports(false, true);
if (onDemandRefs.length > 0) {
PsiPackage aPackage = facade.findPackage(packageName);
if (aPackage != null) {
PsiDirectory[] dirs = aPackage.getDirectories();
for (PsiDirectory dir : dirs) {
PsiFile[] files = dir.getFiles(); // do not iterate classes - too slow when not loaded
for (PsiFile aFile : files) {
if (aFile instanceof PsiJavaFile) {
String name = aFile.getVirtualFile().getNameWithoutExtension();
for (PsiElement ref : onDemandRefs) {
String refName =
ref instanceof PsiClass
? ((PsiClass) ref).getQualifiedName()
: ((PsiPackage) ref).getQualifiedName();
String conflictClassName = refName + "." + name;
GlobalSearchScope resolveScope = file.getResolveScope();
PsiClass conflictClass = facade.findClass(conflictClassName, resolveScope);
if (conflictClass != null && helper.isAccessible(conflictClass, file, null)) {
String conflictClassName2 = aPackage.getQualifiedName() + "." + name;
PsiClass conflictClass2 = facade.findClass(conflictClassName2, resolveScope);
if (conflictClass2 != null
&& helper.isAccessible(conflictClass2, file, null)) {
if (ReferencesSearch.search(
conflictClass, new LocalSearchScope(file), false)
.findFirst()
!= null) {
classesToReimport.add(conflictClass);
}
}
}
}
}
}
}
}
}
}
}
try {
PsiImportList importList = file.getImportList();
PsiImportStatement statement;
if (useOnDemand) {
statement = factory.createImportStatementOnDemand(packageName);
} else {
statement = factory.createImportStatement(refClass);
}
importList.add(statement);
if (useOnDemand) {
for (PsiJavaCodeReferenceElement ref : importRefs) {
LOG.assertTrue(ref.getParent() instanceof PsiImportStatement);
if (!ref.isValid()) continue; // todo[dsl] Q?
classesToReimport.add(ref.resolve());
PsiImportStatement importStatement = (PsiImportStatement) ref.getParent();
importStatement.delete();
}
}
for (PsiElement aClassesToReimport : classesToReimport) {
PsiClass aClass = (PsiClass) aClassesToReimport;
if (aClass != null) {
addImport(file, aClass);
}
}
} catch (IncorrectOperationException e) {
LOG.error(e);
}
return true;
}