private static PsiType getNormalizedType(PsiParameter parameter) {
final PsiType type = parameter.getType();
if (type instanceof PsiEllipsisType) {
return ((PsiEllipsisType) type).getComponentType();
}
return type;
}
private static PsiClassType createDefaultConsumerType(Project project, PsiParameter parameter) {
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiClass consumerClass =
psiFacade.findClass("java.util.function.Consumer", GlobalSearchScope.allScope(project));
return consumerClass != null
? psiFacade.getElementFactory().createType(consumerClass, parameter.getType())
: null;
}
@Nullable
private static PsiType getFunctionalType(
int functionalTypeIdx, @NotNull CandidateInfo candidateInfo) {
final PsiMethod psiMethod = (PsiMethod) candidateInfo.getElement();
LOG.assertTrue(true);
final PsiParameter[] methodParameters = psiMethod.getParameterList().getParameters();
if (methodParameters.length == 0) return null;
final PsiParameter param =
functionalTypeIdx < methodParameters.length
? methodParameters[functionalTypeIdx]
: methodParameters[methodParameters.length - 1];
return ((MethodCandidateInfo) candidateInfo).getSiteSubstitutor().substitute(param.getType());
}
public static boolean isMethodEquivalentTo(@NotNull PsiMethod method1, PsiElement another) {
if (method1 == another) return true;
if (!(another instanceof PsiMethod)) return false;
PsiMethod method2 = (PsiMethod) another;
if (!another.isValid()) return false;
if (!method1.getName().equals(method2.getName())) return false;
PsiClass aClass1 = method1.getContainingClass();
PsiClass aClass2 = method2.getContainingClass();
PsiManager manager = method1.getManager();
if (!(aClass1 != null && aClass2 != null && manager.areElementsEquivalent(aClass1, aClass2)))
return false;
PsiParameter[] parameters1 = method1.getParameterList().getParameters();
PsiParameter[] parameters2 = method2.getParameterList().getParameters();
if (parameters1.length != parameters2.length) return false;
for (int i = 0; i < parameters1.length; i++) {
PsiParameter parameter1 = parameters1[i];
PsiParameter parameter2 = parameters2[i];
PsiType type1 = parameter1.getType();
PsiType type2 = parameter2.getType();
if (!compareParamTypes(manager, type1, type2)) return false;
}
return true;
}
private static String createMapperFunctionalExpressionText(
PsiParameter parameter, PsiExpression expression) {
String iteration = "";
if (!isIdentityMapping(parameter, expression)) {
iteration += ".map(";
iteration +=
compoundLambdaOrMethodReference(
parameter,
expression,
"java.util.function.Function",
new PsiType[] {parameter.getType(), expression.getType()});
iteration += ")";
}
return iteration;
}
private static void fixExceptions(PsiElement ref, PsiClassType[] newExceptions)
throws IncorrectOperationException {
// methods' throws lists are already modified, may use ExceptionUtil.collectUnhandledExceptions
newExceptions = filterCheckedExceptions(newExceptions);
PsiElement context = PsiTreeUtil.getParentOfType(ref, PsiTryStatement.class, PsiMethod.class);
if (context instanceof PsiTryStatement) {
PsiTryStatement tryStatement = (PsiTryStatement) context;
PsiCodeBlock tryBlock = tryStatement.getTryBlock();
// Remove unused catches
Collection<PsiClassType> classes =
ExceptionUtil.collectUnhandledExceptions(tryBlock, tryBlock);
PsiParameter[] catchParameters = tryStatement.getCatchBlockParameters();
for (PsiParameter parameter : catchParameters) {
final PsiType caughtType = parameter.getType();
if (!(caughtType instanceof PsiClassType)) continue;
if (ExceptionUtil.isUncheckedExceptionOrSuperclass((PsiClassType) caughtType)) continue;
if (!isCatchParameterRedundant((PsiClassType) caughtType, classes)) continue;
parameter.getParent().delete(); // delete catch section
}
PsiClassType[] exceptionsToAdd = filterUnhandledExceptions(newExceptions, tryBlock);
addExceptions(exceptionsToAdd, tryStatement);
adjustPossibleEmptyTryStatement(tryStatement);
} else {
newExceptions = filterUnhandledExceptions(newExceptions, ref);
if (newExceptions.length > 0) {
// Add new try statement
PsiElementFactory elementFactory = JavaPsiFacade.getElementFactory(ref.getProject());
PsiTryStatement tryStatement =
(PsiTryStatement)
elementFactory.createStatementFromText("try {} catch (Exception e) {}", null);
PsiStatement anchor = PsiTreeUtil.getParentOfType(ref, PsiStatement.class);
LOG.assertTrue(anchor != null);
tryStatement.getTryBlock().add(anchor);
tryStatement = (PsiTryStatement) anchor.getParent().addAfter(tryStatement, anchor);
addExceptions(newExceptions, tryStatement);
anchor.delete();
tryStatement.getCatchSections()[0].delete(); // Delete dummy catch section
}
}
}
private static void checkCall(
@NotNull PsiCallExpression methodCall, @NotNull ProblemsHolder holder) {
PsiMethod method = methodCall.resolveMethod();
if (method == null) return;
PsiParameter[] parameters = method.getParameterList().getParameters();
PsiExpression[] arguments = methodCall.getArgumentList().getExpressions();
for (int i = 0; i < parameters.length; i++) {
PsiParameter parameter = parameters[i];
AllowedValues values = getAllowedValues(parameter, parameter.getType(), null);
if (values == null) continue;
if (i >= arguments.length) break;
PsiExpression argument = arguments[i];
argument = PsiUtil.deparenthesizeExpression(argument);
if (argument == null) continue;
checkMagicParameterArgument(parameter, argument, values, holder);
}
}
private static String createFiltersChainText(
PsiStatement body, PsiParameter parameter, PsiIfStatement ifStatement) {
final List<String> filters = new ArrayList<String>();
while (ifStatement != null && PsiTreeUtil.isAncestor(body, ifStatement, false)) {
final PsiExpression condition = ifStatement.getCondition();
if (condition != null) {
filters.add(
".filter("
+ compoundLambdaOrMethodReference(
parameter,
condition,
"java.util.function.Predicate",
new PsiType[] {parameter.getType()})
+ ")");
}
ifStatement = PsiTreeUtil.getParentOfType(ifStatement, PsiIfStatement.class);
}
Collections.reverse(filters);
return StringUtil.join(filters, "");
}
public static boolean isFreeFromTypeInferenceArgs(
final PsiParameter[] methodParameters,
final PsiLambdaExpression lambdaExpression,
final PsiExpression expression,
final PsiSubstitutor subst,
final PsiType functionalInterfaceType,
final PsiTypeParameter typeParam) {
if (expression instanceof PsiCallExpression
&& ((PsiCallExpression) expression).getTypeArguments().length > 0) return true;
if (expression instanceof PsiNewExpression) {
final PsiJavaCodeReferenceElement classReference =
((PsiNewExpression) expression).getClassOrAnonymousClassReference();
if (classReference != null) {
final PsiReferenceParameterList parameterList = classReference.getParameterList();
if (parameterList != null) {
final PsiTypeElement[] typeParameterElements = parameterList.getTypeParameterElements();
if (typeParameterElements.length > 0) {
if (!(typeParameterElements[0].getType() instanceof PsiDiamondType)) {
return true;
}
}
}
}
}
final PsiParameter[] lambdaParams = lambdaExpression.getParameterList().getParameters();
if (lambdaParams.length != methodParameters.length) return false;
final boolean[] independent = {true};
final PsiMethod interfaceMethod = getFunctionalInterfaceMethod(functionalInterfaceType);
if (interfaceMethod == null) return false;
final TypeParamsChecker paramsChecker = new TypeParamsChecker(lambdaExpression);
for (PsiParameter parameter : interfaceMethod.getParameterList().getParameters()) {
subst.substitute(parameter.getType()).accept(paramsChecker);
}
paramsChecker.myUsedTypeParams.add(typeParam);
expression.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitConditionalExpression(PsiConditionalExpression expression) {
final PsiExpression thenExpression = expression.getThenExpression();
if (thenExpression != null) {
thenExpression.accept(this);
}
final PsiExpression elseExpression = expression.getElseExpression();
if (elseExpression != null) {
elseExpression.accept(this);
}
}
@Override
public void visitReferenceExpression(PsiReferenceExpression expression) {
super.visitReferenceExpression(expression);
int usedParamIdx = -1;
for (int i = 0; i < lambdaParams.length; i++) {
PsiParameter param = lambdaParams[i];
if (expression.isReferenceTo(param)) {
usedParamIdx = i;
break;
}
}
if (usedParamIdx > -1
&& dependsOnTypeParams(
subst.substitute(methodParameters[usedParamIdx].getType()),
functionalInterfaceType,
lambdaExpression,
paramsChecker.myUsedTypeParams.toArray(
new PsiTypeParameter[paramsChecker.myUsedTypeParams.size()]))) {
independent[0] = false;
}
}
});
return independent[0];
}
