@Nullable
public <T extends PsiExpression> PsiType getType(
@NotNull T expr, @NotNull Function<T, PsiType> f) {
PsiType type = getCachedType(expr);
if (type == null) {
final RecursionGuard.StackStamp dStackStamp = PsiDiamondType.ourDiamondGuard.markStack();
final RecursionGuard.StackStamp gStackStamp = PsiResolveHelper.ourGraphGuard.markStack();
type = f.fun(expr);
if (!dStackStamp.mayCacheNow() || !gStackStamp.mayCacheNow()) {
return type;
}
if (type == null) type = TypeConversionUtil.NULL_TYPE;
Reference<PsiType> ref = new SoftReference<PsiType>(type);
myCalculatedTypes.put(expr, ref);
if (type instanceof PsiClassReferenceType) {
// convert reference-based class type to the PsiImmediateClassType, since the reference may
// become invalid
PsiClassType.ClassResolveResult result = ((PsiClassReferenceType) type).resolveGenerics();
PsiClass psiClass = result.getElement();
type =
psiClass == null
? type // for type with unresolved reference, leave it in the cache
// for clients still might be able to retrieve its getCanonicalText() from the
// reference text
: new PsiImmediateClassType(
psiClass,
result.getSubstitutor(),
((PsiClassReferenceType) type).getLanguageLevel(),
type.getAnnotations());
}
}
if (!type.isValid()) {
if (expr.isValid()) {
PsiJavaCodeReferenceElement refInside =
type instanceof PsiClassReferenceType
? ((PsiClassReferenceType) type).getReference()
: null;
@NonNls
String typeinfo =
type
+ " ("
+ type.getClass()
+ ")"
+ (refInside == null
? ""
: "; ref inside: "
+ refInside
+ " ("
+ refInside.getClass()
+ ") valid:"
+ refInside.isValid());
LOG.error(
"Type is invalid: "
+ typeinfo
+ "; expr: '"
+ expr
+ "' ("
+ expr.getClass()
+ ") is valid");
} else {
LOG.error("Expression: '" + expr + "' is invalid, must not be used for getType()");
}
}
return type == TypeConversionUtil.NULL_TYPE ? null : type;
}
/**
* 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;
}