private static boolean isNullLiteralExpression(PsiElement expr) {
if (expr instanceof PsiLiteralExpression) {
final PsiLiteralExpression literalExpression = (PsiLiteralExpression) expr;
return PsiType.NULL.equals(literalExpression.getType());
}
return false;
}
public static PsiType getType(@NotNull PsiClassObjectAccessExpression classAccessExpression) {
GlobalSearchScope resolveScope = classAccessExpression.getResolveScope();
PsiManager manager = classAccessExpression.getManager();
final PsiClass classClass =
JavaPsiFacade.getInstance(manager.getProject()).findClass("java.lang.Class", resolveScope);
if (classClass == null) {
return new PsiClassReferenceType(
new LightClassReference(manager, "Class", "java.lang.Class", resolveScope), null);
}
if (!PsiUtil.isLanguageLevel5OrHigher(classAccessExpression)) {
// Raw java.lang.Class
return JavaPsiFacade.getInstance(manager.getProject())
.getElementFactory()
.createType(classClass);
}
PsiSubstitutor substitutor = PsiSubstitutor.EMPTY;
PsiType operandType = classAccessExpression.getOperand().getType();
if (operandType instanceof PsiPrimitiveType && !PsiType.NULL.equals(operandType)) {
if (PsiType.VOID.equals(operandType)) {
operandType =
JavaPsiFacade.getInstance(manager.getProject())
.getElementFactory()
.createTypeByFQClassName("java.lang.Void", classAccessExpression.getResolveScope());
} else {
operandType = ((PsiPrimitiveType) operandType).getBoxedType(classAccessExpression);
}
}
final PsiTypeParameter[] typeParameters = classClass.getTypeParameters();
if (typeParameters.length == 1) {
substitutor = substitutor.put(typeParameters[0], operandType);
}
return new PsiImmediateClassType(classClass, substitutor);
}
@NotNull
@Override
public PsiDeclarationStatement createVariableDeclarationStatement(
@NotNull String name, @NotNull PsiType type, @Nullable PsiExpression initializer)
throws IncorrectOperationException {
if (!isIdentifier(name)) {
throw new IncorrectOperationException("\"" + name + "\" is not an identifier.");
}
if (PsiType.NULL.equals(type)) {
throw new IncorrectOperationException("Cannot create variable with type \"null\".");
}
String text = "X " + name + (initializer != null ? " = x" : "") + ";";
PsiDeclarationStatement statement =
(PsiDeclarationStatement) createStatementFromText(text, null);
PsiVariable variable = (PsiVariable) statement.getDeclaredElements()[0];
replace(variable.getTypeElement(), createTypeElement(type), text);
boolean generateFinalLocals =
JavaCodeStyleSettingsFacade.getInstance(myManager.getProject()).isGenerateFinalLocals();
PsiUtil.setModifierProperty(variable, PsiModifier.FINAL, generateFinalLocals);
if (initializer != null) {
replace(variable.getInitializer(), initializer, text);
}
GeneratedMarkerVisitor.markGenerated(statement);
return statement;
}
/* Guesswork
*/
@Nullable
private static PsiSubstitutor getInheritorSubstitutorForNewExpression(
final PsiClass baseClass,
final PsiClass inheritor,
final PsiSubstitutor baseSubstitutor,
final PsiElement context) {
final Project project = baseClass.getProject();
JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
final PsiResolveHelper resolveHelper = facade.getResolveHelper();
PsiSubstitutor superSubstitutor =
TypeConversionUtil.getClassSubstitutor(baseClass, inheritor, PsiSubstitutor.EMPTY);
if (superSubstitutor == null) return null;
PsiSubstitutor inheritorSubstitutor = PsiSubstitutor.EMPTY;
for (PsiTypeParameter inheritorParameter : PsiUtil.typeParametersIterable(inheritor)) {
for (PsiTypeParameter baseParameter : PsiUtil.typeParametersIterable(baseClass)) {
final PsiType substituted = superSubstitutor.substitute(baseParameter);
PsiType arg = baseSubstitutor.substitute(baseParameter);
if (arg instanceof PsiWildcardType) arg = ((PsiWildcardType) arg).getBound();
PsiType substitution =
resolveHelper.getSubstitutionForTypeParameter(
inheritorParameter, substituted, arg, true, PsiUtil.getLanguageLevel(context));
if (PsiType.NULL.equals(substitution)) continue;
if (substitution == null) {
return facade.getElementFactory().createRawSubstitutor(inheritor);
}
inheritorSubstitutor = inheritorSubstitutor.put(inheritorParameter, substitution);
break;
}
}
return inheritorSubstitutor;
}
@NotNull
@Override
public PsiMethod createMethod(@NotNull final String name, final PsiType returnType)
throws IncorrectOperationException {
PsiUtil.checkIsIdentifier(myManager, name);
if (PsiType.NULL.equals(returnType)) {
throw new IncorrectOperationException("Cannot create method with type \"null\".");
}
final String canonicalText = returnType.getCanonicalText();
final PsiJavaFile aFile =
createDummyJavaFile("class _Dummy_ { public " + canonicalText + " " + name + "() {} }");
final PsiClass[] classes = aFile.getClasses();
if (classes.length < 1) {
throw new IncorrectOperationException(
"Class was not created. Method name: " + name + "; return type: " + canonicalText);
}
final PsiMethod[] methods = classes[0].getMethods();
if (methods.length < 1) {
throw new IncorrectOperationException(
"Method was not created. Method name: " + name + "; return type: " + canonicalText);
}
PsiMethod method = methods[0];
method =
(PsiMethod)
JavaCodeStyleManager.getInstance(myManager.getProject()).shortenClassReferences(method);
return (PsiMethod) CodeStyleManager.getInstance(myManager.getProject()).reformat(method);
}
@NotNull
@Override
public PsiField createField(@NotNull final String name, @NotNull final PsiType type)
throws IncorrectOperationException {
PsiUtil.checkIsIdentifier(myManager, name);
if (PsiType.NULL.equals(type)) {
throw new IncorrectOperationException("Cannot create field with type \"null\".");
}
@NonNls
final String text = "class _Dummy_ { private " + type.getCanonicalText() + " " + name + "; }";
final PsiJavaFile aFile = createDummyJavaFile(text);
final PsiClass[] classes = aFile.getClasses();
if (classes.length < 1) {
throw new IncorrectOperationException("Class was not created " + text);
}
final PsiClass psiClass = classes[0];
final PsiField[] fields = psiClass.getFields();
if (fields.length < 1) {
throw new IncorrectOperationException("Field was not created " + text);
}
PsiField field = fields[0];
field =
(PsiField)
JavaCodeStyleManager.getInstance(myManager.getProject()).shortenClassReferences(field);
return (PsiField) CodeStyleManager.getInstance(myManager.getProject()).reformat(field);
}
private static boolean isGoodExpression(
PsiExpression expression,
@NotNull AllowedValues allowedValues,
@NotNull PsiElement scope,
@NotNull PsiManager manager) {
expression = PsiUtil.deparenthesizeExpression(expression);
if (expression == null) return true;
if (expression instanceof PsiConditionalExpression) {
PsiExpression thenExpression = ((PsiConditionalExpression) expression).getThenExpression();
boolean thenAllowed =
thenExpression == null || isAllowed(scope, thenExpression, allowedValues, manager);
if (!thenAllowed) return false;
PsiExpression elseExpression = ((PsiConditionalExpression) expression).getElseExpression();
return elseExpression == null || isAllowed(scope, elseExpression, allowedValues, manager);
}
if (isOneOf(expression, allowedValues, manager)) return true;
if (allowedValues.canBeOred) {
PsiExpression zero = getLiteralExpression(expression, manager, "0");
if (same(expression, zero, manager)) return true;
PsiExpression mOne = getLiteralExpression(expression, manager, "-1");
if (same(expression, mOne, manager)) return true;
if (expression instanceof PsiPolyadicExpression) {
IElementType tokenType = ((PsiPolyadicExpression) expression).getOperationTokenType();
if (JavaTokenType.OR.equals(tokenType) || JavaTokenType.AND.equals(tokenType)) {
for (PsiExpression operand : ((PsiPolyadicExpression) expression).getOperands()) {
if (!isAllowed(scope, operand, allowedValues, manager)) return false;
}
return true;
}
}
if (expression instanceof PsiPrefixExpression
&& JavaTokenType.TILDE.equals(
((PsiPrefixExpression) expression).getOperationTokenType())) {
PsiExpression operand = ((PsiPrefixExpression) expression).getOperand();
return operand == null || isAllowed(scope, operand, allowedValues, manager);
}
}
PsiElement resolved = null;
if (expression instanceof PsiReference) {
resolved = ((PsiReference) expression).resolve();
} else if (expression instanceof PsiCallExpression) {
resolved = ((PsiCallExpression) expression).resolveMethod();
}
AllowedValues allowedForRef;
if (resolved instanceof PsiModifierListOwner
&& (allowedForRef =
getAllowedValues(
(PsiModifierListOwner) resolved,
getType((PsiModifierListOwner) resolved),
null))
!= null
&& allowedForRef.isSubsetOf(allowedValues, manager)) return true;
return PsiType.NULL.equals(expression.getType());
}
@Override
public String handleEmptyLookup(
@NotNull final CompletionParameters parameters, final Editor editor) {
if (!(parameters.getOriginalFile() instanceof PsiJavaFile)) return null;
final String ad = advertise(parameters);
final String suffix = ad == null ? "" : "; " + StringUtil.decapitalize(ad);
if (parameters.getCompletionType() == CompletionType.SMART) {
if (!ApplicationManager.getApplication().isUnitTestMode()) {
final Project project = parameters.getPosition().getProject();
final PsiFile file = parameters.getOriginalFile();
PsiExpression expression =
PsiTreeUtil.getContextOfType(parameters.getPosition(), PsiExpression.class, true);
if (expression != null && expression.getParent() instanceof PsiExpressionList) {
int lbraceOffset = expression.getParent().getTextRange().getStartOffset();
ShowParameterInfoHandler.invoke(project, editor, file, lbraceOffset, null);
}
if (expression instanceof PsiLiteralExpression) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
if (expression instanceof PsiInstanceOfExpression) {
final PsiInstanceOfExpression instanceOfExpression = (PsiInstanceOfExpression) expression;
if (PsiTreeUtil.isAncestor(
instanceOfExpression.getCheckType(), parameters.getPosition(), false)) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
}
}
final Set<PsiType> expectedTypes = JavaCompletionUtil.getExpectedTypes(parameters);
if (expectedTypes != null) {
PsiType type = expectedTypes.size() == 1 ? expectedTypes.iterator().next() : null;
if (type != null) {
final PsiType deepComponentType = type.getDeepComponentType();
if (deepComponentType instanceof PsiClassType) {
if (((PsiClassType) deepComponentType).resolve() != null) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
return CompletionBundle.message("completion.unknown.type", type.getPresentableText())
+ suffix;
}
if (!PsiType.NULL.equals(type)) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
}
}
}
return LangBundle.message("completion.no.suggestions") + suffix;
}
@Nullable
private static PsiReferenceExpression getReferenceFromNullCheck(
PsiBinaryExpression expression) {
final PsiExpression lhs = ParenthesesUtils.stripParentheses(expression.getLOperand());
final PsiExpression rhs = ParenthesesUtils.stripParentheses(expression.getROperand());
if (lhs instanceof PsiReferenceExpression) {
if (!(rhs instanceof PsiLiteralExpression && PsiType.NULL.equals(rhs.getType()))) {
return null;
}
return (PsiReferenceExpression) lhs;
} else if (rhs instanceof PsiReferenceExpression) {
if (!(lhs instanceof PsiLiteralExpression && PsiType.NULL.equals(lhs.getType()))) {
return null;
}
return (PsiReferenceExpression) rhs;
} else {
return null;
}
}
@Override
public void visitThrowStatement(PsiThrowStatement statement) {
super.visitThrowStatement(statement);
final PsiExpression exception = ParenthesesUtils.stripParentheses(statement.getException());
if (!(exception instanceof PsiLiteralExpression)) {
return;
}
final PsiType type = exception.getType();
if (!PsiType.NULL.equals(type)) {
return;
}
registerError(exception);
}
@Nullable
public PsiType fun(GrReferenceExpressionImpl refExpr) {
PsiType result = GrReassignedLocalVarsChecker.checkReassignedVar(refExpr, true);
if (result != null) return result;
if (GrUnresolvedAccessInspection.isClassReference(refExpr)) {
GrExpression qualifier = refExpr.getQualifier();
LOG.assertTrue(qualifier != null);
return TypesUtil.createJavaLangClassType(
qualifier.getType(), refExpr.getProject(), refExpr.getResolveScope());
}
final PsiElement resolved = refExpr.resolve();
final PsiType inferred = getInferredTypes(refExpr, resolved);
final PsiType nominal = refExpr.getNominalType();
if (inferred == null || PsiType.NULL.equals(inferred)) {
if (nominal == null) {
// inside nested closure we could still try to infer from variable initializer. Not sound,
// but makes sense
if (resolved instanceof GrVariable) {
LOG.assertTrue(resolved.isValid());
return ((GrVariable) resolved).getTypeGroovy();
}
}
return nominal;
}
if (nominal == null) return inferred;
if (!TypeConversionUtil.isAssignable(TypeConversionUtil.erasure(nominal), inferred, false)) {
if (resolved instanceof GrVariable
&& ((GrVariable) resolved).getTypeElementGroovy() != null) {
return nominal;
}
}
return inferred;
}
@NotNull
@Override
public PsiParameter createParameter(@NotNull final String name, @NotNull final PsiType type)
throws IncorrectOperationException {
PsiUtil.checkIsIdentifier(myManager, name);
if (PsiType.NULL.equals(type)) {
throw new IncorrectOperationException("Cannot create parameter with type \"null\".");
}
final String text = type.getCanonicalText() + " " + name;
PsiParameter parameter = createParameterFromText(text, null);
final CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(myManager.getProject());
PsiUtil.setModifierProperty(
parameter,
PsiModifier.FINAL,
JavaCodeStyleSettingsFacade.getInstance(myManager.getProject())
.isGenerateFinalParameters());
GeneratedMarkerVisitor.markGenerated(parameter);
parameter =
(PsiParameter)
JavaCodeStyleManager.getInstance(myManager.getProject())
.shortenClassReferences(parameter);
return (PsiParameter) codeStyleManager.reformat(parameter);
}
@Override
public Boolean visitPrimitiveType(PsiPrimitiveType primitiveType) {
return PsiType.VOID.equals(primitiveType) || PsiType.NULL.equals(primitiveType)
? Boolean.FALSE
: Boolean.TRUE;
}