public String calcGenerics(@NotNull PsiElement context, InsertionContext insertionContext) {
if (insertionContext.getCompletionChar() == '<') {
return "";
}
assert context.isValid();
if (myDiamond) {
return "<>";
}
if (getObject() instanceof PsiClass) {
PsiClass psiClass = (PsiClass) getObject();
PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(psiClass.getProject()).getResolveHelper();
PsiSubstitutor substitutor = getSubstitutor();
StringBuilder builder = new StringBuilder();
for (PsiTypeParameter parameter : psiClass.getTypeParameters()) {
PsiType substitute = substitutor.substitute(parameter);
if (substitute == null
|| (PsiUtil.resolveClassInType(substitute) == parameter
&& resolveHelper.resolveReferencedClass(parameter.getName(), context)
!= CompletionUtil.getOriginalOrSelf(parameter))) {
return "";
}
if (builder.length() > 0) {
builder.append(", ");
}
builder.append(substitute.getCanonicalText());
}
if (builder.length() > 0) {
return "<" + builder + ">";
}
}
return "";
}
private static boolean isSafeToShortenReference(
final String referenceText, final PsiElement psiReference, final PsiClass refClass) {
final PsiManager manager = refClass.getManager();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(manager.getProject());
final PsiResolveHelper helper = facade.getResolveHelper();
if (manager.areElementsEquivalent(
refClass, helper.resolveReferencedClass(referenceText, psiReference))) {
PsiElement parent = psiReference.getParent();
if (parent instanceof PsiJavaCodeReferenceElement
&& parent.getParent() instanceof PsiNewExpression) return true;
return helper.resolveReferencedVariable(referenceText, psiReference) == null;
}
return false;
}
public TreeElement process(TreeElement element, boolean addImports, boolean uncompleteCode) {
IElementType elementType = element.getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| elementType == JavaElementType.REFERENCE_EXPRESSION) {
final IElementType parentElementType = element.getTreeParent().getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| parentElementType == JavaElementType.REFERENCE_EXPRESSION
|| parentElementType == JavaElementType.METHOD_REF_EXPRESSION
|| uncompleteCode) {
final PsiJavaCodeReferenceElement ref =
(PsiJavaCodeReferenceElement) SourceTreeToPsiMap.treeElementToPsi(element);
final PsiReferenceParameterList parameterList = ref.getParameterList();
if (parameterList != null) {
final PsiTypeElement[] typeParameters = parameterList.getTypeParameterElements();
for (PsiTypeElement typeParameter : typeParameters) {
process(
(TreeElement) SourceTreeToPsiMap.psiElementToTree(typeParameter),
addImports,
uncompleteCode);
}
}
boolean rightKind = true;
if (elementType == JavaElementType.JAVA_CODE_REFERENCE) {
int kind = ((PsiJavaCodeReferenceElementImpl) element).getKind();
rightKind =
kind == PsiJavaCodeReferenceElementImpl.CLASS_NAME_KIND
|| kind == PsiJavaCodeReferenceElementImpl.CLASS_OR_PACKAGE_NAME_KIND;
}
if (rightKind) {
boolean isInsideDocComment =
TreeUtil.findParent(element, JavaDocElementType.DOC_COMMENT) != null;
boolean isShort = !((SourceJavaCodeReference) element).isQualified();
if (!makeFQ(isInsideDocComment)) {
if (isShort) return element; // short name already, no need to change
}
PsiElement refElement;
if (!uncompleteCode) {
refElement = ref.resolve();
} else {
PsiResolveHelper helper =
JavaPsiFacade.getInstance(element.getManager().getProject()).getResolveHelper();
refElement =
helper.resolveReferencedClass(
((SourceJavaCodeReference) element).getClassNameText(),
SourceTreeToPsiMap.treeElementToPsi(element));
}
if (refElement instanceof PsiClass) {
if (makeFQ(isInsideDocComment)) {
String qName = ((PsiClass) refElement).getQualifiedName();
if (qName == null) return element;
PsiImportHolder file =
(PsiImportHolder)
SourceTreeToPsiMap.treeElementToPsi(element).getContainingFile();
if (file instanceof PsiJavaFile
&& ImportHelper.isImplicitlyImported(qName, (PsiJavaFile) file)) {
if (isShort) return element;
return (TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
}
if (file instanceof PsiJavaFile) {
String thisPackageName = ((PsiJavaFile) file).getPackageName();
if (ImportHelper.hasPackage(qName, thisPackageName)) {
if (!isShort) {
return (TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
}
}
}
return (TreeElement) replaceReferenceWithFQ(element, (PsiClass) refElement);
} else {
int oldLength = element.getTextLength();
TreeElement treeElement =
(TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
if (treeElement.getTextLength() == oldLength
&& ((PsiClass) refElement).getContainingClass() != null) {
PsiElement qualifier = ref.getQualifier();
if (qualifier instanceof PsiJavaCodeReferenceElement
&& ((PsiJavaCodeReferenceElement) qualifier).resolve() instanceof PsiClass) {
process((TreeElement) qualifier.getNode(), addImports, uncompleteCode);
}
}
return treeElement;
}
}
}
}
}
for (TreeElement child = element.getFirstChildNode();
child != null;
child = child.getTreeNext()) {
child = process(child, addImports, uncompleteCode);
}
return element;
}
@Override
public ASTNode process(
@NotNull ASTNode element,
boolean addImports,
boolean incompleteCode,
boolean useFqInJavadoc,
boolean useFqInCode) {
IElementType elementType = element.getElementType();
if ((elementType == JavaElementType.JAVA_CODE_REFERENCE
|| elementType == JavaElementType.REFERENCE_EXPRESSION)
&& !isAnnotated(element)) {
IElementType parentType = element.getTreeParent().getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| incompleteCode
|| parentType == JavaElementType.REFERENCE_EXPRESSION
|| parentType == JavaElementType.METHOD_REF_EXPRESSION) {
PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) element.getPsi();
PsiReferenceParameterList parameterList = ref.getParameterList();
if (parameterList != null) {
PsiTypeElement[] typeParameters = parameterList.getTypeParameterElements();
for (PsiTypeElement typeParameter : typeParameters) {
process(
typeParameter.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
}
boolean rightKind = true;
if (elementType == JavaElementType.JAVA_CODE_REFERENCE) {
PsiJavaCodeReferenceElementImpl impl = (PsiJavaCodeReferenceElementImpl) element;
int kind = impl.getKind(impl.getContainingFile());
rightKind =
kind == PsiJavaCodeReferenceElementImpl.CLASS_NAME_KIND
|| kind == PsiJavaCodeReferenceElementImpl.CLASS_OR_PACKAGE_NAME_KIND;
}
if (rightKind) {
// annotations may jump out of reference (see PsiJavaCodeReferenceImpl#setAnnotations())
// so they should be processed first
List<PsiAnnotation> annotations =
PsiTreeUtil.getChildrenOfTypeAsList(ref, PsiAnnotation.class);
for (PsiAnnotation annotation : annotations) {
process(annotation.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
boolean isInsideDocComment =
TreeUtil.findParent(element, JavaDocElementType.DOC_COMMENT) != null;
boolean isShort = !ref.isQualified();
if (isInsideDocComment ? !useFqInJavadoc : !useFqInCode) {
if (isShort) return element; // short name already, no need to change
}
PsiElement refElement;
if (!incompleteCode) {
refElement = ref.resolve();
} else {
PsiResolveHelper helper =
JavaPsiFacade.getInstance(ref.getManager().getProject()).getResolveHelper();
final SourceJavaCodeReference reference = (SourceJavaCodeReference) element;
refElement = helper.resolveReferencedClass(reference.getClassNameText(), ref);
}
if (refElement instanceof PsiClass) {
PsiClass psiClass = (PsiClass) refElement;
if (isInsideDocComment ? useFqInJavadoc : useFqInCode) {
String qName = psiClass.getQualifiedName();
if (qName == null) return element;
PsiFile file = ref.getContainingFile();
if (file instanceof PsiJavaFile) {
if (ImportHelper.isImplicitlyImported(qName, (PsiJavaFile) file)) {
if (isShort) return element;
return makeShortReference((CompositeElement) element, psiClass, addImports);
}
String thisPackageName = ((PsiJavaFile) file).getPackageName();
if (ImportHelper.hasPackage(qName, thisPackageName)) {
if (!isShort) {
return makeShortReference((CompositeElement) element, psiClass, addImports);
}
}
}
return replaceReferenceWithFQ(element, psiClass);
} else {
int oldLength = element.getTextLength();
ASTNode treeElement =
makeShortReference((CompositeElement) element, psiClass, addImports);
if (treeElement.getTextLength() == oldLength
&& psiClass.getContainingClass() != null) {
PsiElement qualifier = ref.getQualifier();
if (qualifier instanceof PsiJavaCodeReferenceElement
&& ((PsiJavaCodeReferenceElement) qualifier).resolve() instanceof PsiClass) {
process(
qualifier.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
}
return treeElement;
}
}
}
}
}
for (ASTNode child = element.getFirstChildNode(); child != null; child = child.getTreeNext()) {
//noinspection AssignmentToForLoopParameter
child = process(child, addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
return element;
}
/**
* 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;
}