private static void checkSillyAssignment(
PsiAssignmentExpression assignment, ProblemsHolder holder) {
if (assignment.getOperationTokenType() != JavaTokenType.EQ) return;
PsiExpression lExpression = assignment.getLExpression();
PsiExpression rExpression = assignment.getRExpression();
if (rExpression == null) return;
lExpression = PsiUtil.deparenthesizeExpression(lExpression);
rExpression = PsiUtil.deparenthesizeExpression(rExpression);
if (!(lExpression instanceof PsiReferenceExpression)) return;
PsiReferenceExpression rRef;
if (!(rExpression instanceof PsiReferenceExpression)) {
if (!(rExpression instanceof PsiAssignmentExpression)) return;
final PsiAssignmentExpression rAssignmentExpression = (PsiAssignmentExpression) rExpression;
final PsiExpression assignee =
PsiUtil.deparenthesizeExpression(rAssignmentExpression.getLExpression());
if (!(assignee instanceof PsiReferenceExpression)) return;
rRef = (PsiReferenceExpression) assignee;
} else {
rRef = (PsiReferenceExpression) rExpression;
}
PsiReferenceExpression lRef = (PsiReferenceExpression) lExpression;
PsiManager manager = assignment.getManager();
if (!sameInstanceReferences(lRef, rRef, manager)) return;
final PsiVariable variable = (PsiVariable) lRef.resolve();
if (variable == null) return;
holder.registerProblem(
assignment,
InspectionsBundle.message("assignment.to.itself.problem.descriptor", variable.getName()),
ProblemHighlightType.LIKE_UNUSED_SYMBOL);
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
PsiElement element = descriptor.getStartElement();
if (!(element instanceof PsiLoopStatement)) return;
PsiLoopStatement loop = (PsiLoopStatement) element;
IteratorDeclaration declaration;
declaration = IteratorDeclaration.fromLoop(loop);
if (declaration == null) return;
PsiStatement body = loop.getBody();
if (!(body instanceof PsiBlockStatement)) return;
PsiStatement[] statements = ((PsiBlockStatement) body).getCodeBlock().getStatements();
PsiElementFactory factory = JavaPsiFacade.getElementFactory(project);
String replacement = null;
CommentTracker ct = new CommentTracker();
if (statements.length == 2 && statements[1] instanceof PsiIfStatement) {
PsiVariable variable = declaration.getNextElementVariable(statements[0]);
if (variable == null) return;
PsiExpression condition = ((PsiIfStatement) statements[1]).getCondition();
if (condition == null) return;
replacement = generateRemoveIf(declaration, ct, condition, variable.getName());
} else if (statements.length == 1 && statements[0] instanceof PsiIfStatement) {
PsiExpression condition = ((PsiIfStatement) statements[0]).getCondition();
if (condition == null) return;
PsiElement ref = declaration.findOnlyIteratorRef(condition);
if (ref != null) {
PsiElement call = ref.getParent().getParent();
if (!declaration.isIteratorMethodCall(call, "next")) return;
PsiType type = ((PsiExpression) call).getType();
JavaCodeStyleManager javaCodeStyleManager = JavaCodeStyleManager.getInstance(project);
SuggestedNameInfo info =
javaCodeStyleManager.suggestVariableName(VariableKind.PARAMETER, null, null, type);
if (info.names.length == 0) {
info =
javaCodeStyleManager.suggestVariableName(
VariableKind.PARAMETER, "value", null, type);
}
String paramName =
javaCodeStyleManager.suggestUniqueVariableName(info, condition, true).names[0];
ct.replace(call, factory.createIdentifier(paramName));
replacement = generateRemoveIf(declaration, ct, condition, paramName);
}
}
if (replacement == null) return;
ct.delete(declaration.getIterator());
PsiElement result = ct.replaceAndRestoreComments(loop, replacement);
LambdaCanBeMethodReferenceInspection.replaceAllLambdasWithMethodReferences(result);
CodeStyleManager.getInstance(project).reformat(result);
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
final PsiElement element = descriptor.getPsiElement();
final PsiModifierListOwner psiElement =
PsiTreeUtil.getParentOfType(element, PsiModifierListOwner.class);
if (psiElement != null) {
RefJavaElement refElement =
(RefJavaElement) (myManager != null ? myManager.getReference(psiElement) : null);
try {
if (psiElement instanceof PsiVariable) {
((PsiVariable) psiElement).normalizeDeclaration();
}
final PsiModifierList modifierList = psiElement.getModifierList();
LOG.assertTrue(modifierList != null);
modifierList.setModifierProperty(PsiModifier.FINAL, true);
modifierList.setModifierProperty(PsiModifier.VOLATILE, false);
} catch (IncorrectOperationException e) {
LOG.error(e);
}
if (refElement != null) {
RefJavaUtil.getInstance().setIsFinal(refElement, true);
}
}
}
private static String getConstantValueText(Object value, @Nullable PsiVariable constant) {
if (constant != null) {
return constant instanceof PsiMember
? PsiUtil.getMemberQualifiedName((PsiMember) constant)
: constant.getName();
}
return value instanceof String
? "\"" + StringUtil.escapeStringCharacters((String) value) + "\""
: String.valueOf(value);
}
/**
* @return true if both expressions resolve to the same variable/class or field in the same
* instance of the class
*/
private static boolean sameInstanceReferences(
@Nullable PsiJavaCodeReferenceElement lRef,
@Nullable PsiJavaCodeReferenceElement rRef,
PsiManager manager) {
if (lRef == null && rRef == null) return true;
if (lRef == null || rRef == null) return false;
PsiElement lResolved = lRef.resolve();
PsiElement rResolved = rRef.resolve();
if (!manager.areElementsEquivalent(lResolved, rResolved)) return false;
if (!(lResolved instanceof PsiVariable)) return false;
final PsiVariable variable = (PsiVariable) lResolved;
if (variable.hasModifierProperty(PsiModifier.STATIC)) return true;
final PsiElement lQualifier = lRef.getQualifier();
final PsiElement rQualifier = rRef.getQualifier();
if (lQualifier instanceof PsiJavaCodeReferenceElement
&& rQualifier instanceof PsiJavaCodeReferenceElement) {
return sameInstanceReferences(
(PsiJavaCodeReferenceElement) lQualifier,
(PsiJavaCodeReferenceElement) rQualifier,
manager);
}
if (Comparing.equal(lQualifier, rQualifier)) return true;
boolean lThis =
lQualifier == null
|| lQualifier instanceof PsiThisExpression
|| lQualifier instanceof PsiSuperExpression;
boolean rThis =
rQualifier == null
|| rQualifier instanceof PsiThisExpression
|| rQualifier instanceof PsiSuperExpression;
if (lThis && rThis) {
final PsiJavaCodeReferenceElement llQualifier = getQualifier(lQualifier);
final PsiJavaCodeReferenceElement rrQualifier = getQualifier(rQualifier);
return sameInstanceReferences(llQualifier, rrQualifier, manager);
}
return false;
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
if (!FileModificationService.getInstance()
.preparePsiElementForWrite(descriptor.getPsiElement())) return;
final PsiModifierListOwner element =
PsiTreeUtil.getParentOfType(descriptor.getPsiElement(), PsiModifierListOwner.class);
if (element != null) {
RefElement refElement = null;
if (myManager != null) {
refElement = myManager.getReference(element);
}
try {
if (element instanceof PsiVariable) {
((PsiVariable) element).normalizeDeclaration();
}
PsiModifierList list = element.getModifierList();
LOG.assertTrue(list != null);
if (element instanceof PsiMethod) {
PsiMethod psiMethod = (PsiMethod) element;
PsiClass containingClass = psiMethod.getContainingClass();
if (containingClass != null
&& containingClass.getParent() instanceof PsiFile
&& myHint == PsiModifier.PRIVATE
&& list.hasModifierProperty(PsiModifier.FINAL)) {
list.setModifierProperty(PsiModifier.FINAL, false);
}
}
list.setModifierProperty(myHint, true);
if (refElement instanceof RefJavaElement) {
RefJavaUtil.getInstance().setAccessModifier((RefJavaElement) refElement, myHint);
}
} catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
private static void reportConstantReferenceValues(
ProblemsHolder holder, StandardInstructionVisitor visitor, Set<PsiElement> reportedAnchors) {
for (Pair<PsiReferenceExpression, DfaConstValue> pair : visitor.getConstantReferenceValues()) {
PsiReferenceExpression ref = pair.first;
if (!reportedAnchors.add(ref)) {
continue;
}
final Object value = pair.second.getValue();
PsiVariable constant = pair.second.getConstant();
final String presentableName = constant != null ? constant.getName() : String.valueOf(value);
final String exprText = getConstantValueText(value, constant);
if (presentableName == null || exprText == null) {
continue;
}
holder.registerProblem(
ref,
"Value <code>#ref</code> #loc is always '" + presentableName + "'",
new LocalQuickFix() {
@NotNull
@Override
public String getName() {
return "Replace with '" + presentableName + "'";
}
@NotNull
@Override
public String getFamilyName() {
return "Replace with constant value";
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
if (!FileModificationService.getInstance()
.preparePsiElementsForWrite(descriptor.getPsiElement())) {
return;
}
JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
PsiElement newElement =
descriptor
.getPsiElement()
.replace(facade.getElementFactory().createExpressionFromText(exprText, null));
newElement =
JavaCodeStyleManager.getInstance(project).shortenClassReferences(newElement);
if (newElement instanceof PsiJavaCodeReferenceElement) {
PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) newElement;
PsiElement target = ref.resolve();
String shortName = ref.getReferenceName();
if (target != null
&& shortName != null
&& ref.isQualified()
&& facade.getResolveHelper().resolveReferencedVariable(shortName, newElement)
== target) {
newElement.replace(
facade.getElementFactory().createExpressionFromText(shortName, null));
}
}
}
});
}
}
private static void reportConstantReferenceValues(
ProblemsHolder holder, StandardInstructionVisitor visitor, Set<PsiElement> reportedAnchors) {
for (Pair<PsiReferenceExpression, DfaConstValue> pair : visitor.getConstantReferenceValues()) {
PsiReferenceExpression ref = pair.first;
if (ref.getParent() instanceof PsiReferenceExpression || !reportedAnchors.add(ref)) {
continue;
}
final Object value = pair.second.getValue();
PsiVariable constant = pair.second.getConstant();
final String presentableName = constant != null ? constant.getName() : String.valueOf(value);
final String exprText = String.valueOf(value);
if (presentableName == null || exprText == null) {
continue;
}
holder.registerProblem(
ref,
"Value <code>#ref</code> #loc is always '" + presentableName + "'",
new LocalQuickFix() {
@NotNull
@Override
public String getName() {
return "Replace with '" + presentableName + "'";
}
@NotNull
@Override
public String getFamilyName() {
return "Replace with constant value";
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
if (!FileModificationService.getInstance()
.preparePsiElementsForWrite(descriptor.getPsiElement())) {
return;
}
PsiElement problemElement = descriptor.getPsiElement();
if (problemElement == null) return;
PsiMethodCallExpression call =
problemElement.getParent() instanceof PsiExpressionList
&& problemElement.getParent().getParent()
instanceof PsiMethodCallExpression
? (PsiMethodCallExpression) problemElement.getParent().getParent()
: null;
PsiMethod targetMethod = call == null ? null : call.resolveMethod();
JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
problemElement.replace(
facade.getElementFactory().createExpressionFromText(exprText, null));
if (targetMethod != null) {
ExtractMethodUtil.addCastsToEnsureResolveTarget(targetMethod, call);
}
}
});
}
}