private static void checkMethodCall(RefElement refWhat, final PsiElement element) {
if (!(refWhat instanceof RefMethod)) return;
final RefMethod refMethod = (RefMethod) refWhat;
final PsiElement psiElement = refMethod.getElement();
if (!(psiElement instanceof PsiMethod)) return;
final PsiMethod psiMethod = (PsiMethod) psiElement;
if (!PsiType.BOOLEAN.equals(psiMethod.getReturnType())) return;
element.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitMethodCallExpression(PsiMethodCallExpression call) {
super.visitMethodCallExpression(call);
final PsiReferenceExpression methodExpression = call.getMethodExpression();
if (methodExpression.isReferenceTo(psiMethod)) {
if (isInvertedMethodCall(methodExpression)) return;
refMethod.putUserData(ALWAYS_INVERTED, Boolean.FALSE);
}
}
@Override
public void visitMethodReferenceExpression(PsiMethodReferenceExpression expression) {
super.visitMethodReferenceExpression(expression);
if (expression.isReferenceTo(psiElement)) {
refMethod.putUserData(ALWAYS_INVERTED, Boolean.FALSE);
}
}
});
}
private static boolean hasNonInvertedCalls(final RefMethod refMethod) {
final Boolean alwaysInverted = refMethod.getUserData(ALWAYS_INVERTED);
if (alwaysInverted == null) return true;
if (refMethod.isExternalOverride()) return true;
if (refMethod.isReferenced() && !alwaysInverted.booleanValue()) return true;
final Collection<RefMethod> superMethods = refMethod.getSuperMethods();
for (RefMethod superMethod : superMethods) {
if (hasNonInvertedCalls(superMethod)) return true;
}
return false;
}
@Override
public void onInitialize(RefElement refElement) {
((RefElementImpl) refElement).setFlag(true, CAN_BE_FINAL_MASK);
if (refElement instanceof RefClass) {
final RefClass refClass = (RefClass) refElement;
final PsiClass psiClass = refClass.getElement();
if (refClass.isEntry()) {
((RefClassImpl) refClass).setFlag(false, CAN_BE_FINAL_MASK);
return;
}
if (refClass.isAbstract() || refClass.isAnonymous() || refClass.isInterface()) {
((RefClassImpl) refClass).setFlag(false, CAN_BE_FINAL_MASK);
return;
}
if (!refClass.isSelfInheritor(psiClass)) {
for (PsiClass psiSuperClass : psiClass.getSupers()) {
if (myManager.belongsToScope(psiSuperClass)) {
RefClass refSuperClass = (RefClass) myManager.getReference(psiSuperClass);
if (refSuperClass != null) {
((RefClassImpl) refSuperClass).setFlag(false, CAN_BE_FINAL_MASK);
}
}
}
}
} else if (refElement instanceof RefMethod) {
final RefMethod refMethod = (RefMethod) refElement;
final PsiElement element = refMethod.getElement();
if (element instanceof PsiMethod) {
PsiMethod psiMethod = (PsiMethod) element;
if (refMethod.isConstructor()
|| refMethod.isAbstract()
|| refMethod.isStatic()
|| PsiModifier.PRIVATE.equals(refMethod.getAccessModifier())
|| refMethod.getOwnerClass().isAnonymous()
|| refMethod.getOwnerClass().isInterface()) {
((RefMethodImpl) refMethod).setFlag(false, CAN_BE_FINAL_MASK);
}
if (PsiModifier.PRIVATE.equals(refMethod.getAccessModifier())
&& refMethod.getOwner() != null
&& !(refMethod.getOwnerClass().getOwner() instanceof RefElement)) {
((RefMethodImpl) refMethod).setFlag(false, CAN_BE_FINAL_MASK);
}
for (PsiMethod psiSuperMethod : psiMethod.findSuperMethods()) {
if (myManager.belongsToScope(psiSuperMethod)) {
RefMethod refSuperMethod = (RefMethod) myManager.getReference(psiSuperMethod);
if (refSuperMethod != null) {
((RefMethodImpl) refSuperMethod).setFlag(false, CAN_BE_FINAL_MASK);
}
}
}
}
}
}
public void appendDerivedMethods(StringBuffer buf, RefMethod refMethod) {
if (refMethod.getDerivedMethods().size() > 0) {
HTMLComposer.appendHeading(
buf, InspectionsBundle.message("inspection.export.results.derived.methods"));
myComposer.startList(buf);
for (RefMethod refDerived : refMethod.getDerivedMethods()) {
myComposer.appendListItem(buf, refDerived);
}
myComposer.doneList(buf);
}
}
public void appendSuperMethods(StringBuffer buf, RefMethod refMethod) {
if (refMethod.getSuperMethods().size() > 0) {
HTMLComposer.appendHeading(
buf, InspectionsBundle.message("inspection.export.results.overrides.implements"));
myComposer.startList(buf);
for (RefMethod refSuper : refMethod.getSuperMethods()) {
myComposer.appendListItem(buf, refSuper);
}
myComposer.doneList(buf);
}
}
private static void clearUsedParameters(
@NotNull RefMethod refMethod, RefParameter[] params, boolean checkDeep) {
RefParameter[] methodParms = refMethod.getParameters();
for (int i = 0; i < methodParms.length; i++) {
if (methodParms[i].isUsedForReading()) params[i] = null;
}
if (checkDeep) {
for (RefMethod refOverride : refMethod.getDerivedMethods()) {
clearUsedParameters(refOverride, params, checkDeep);
}
}
}
@Override
@Nullable
public CommonProblemDescriptor[] checkElement(
@NotNull final RefEntity refEntity,
@NotNull final AnalysisScope scope,
@NotNull final InspectionManager manager,
@NotNull final GlobalInspectionContext globalContext,
@NotNull final ProblemDescriptionsProcessor processor) {
if (refEntity instanceof RefJavaElement) {
final RefJavaElement refElement = (RefJavaElement) refEntity;
if (refElement instanceof RefParameter) return null;
if (!refElement.isReferenced()) return null;
if (refElement.isSyntheticJSP()) return null;
if (refElement.isFinal()) return null;
if (!((RefElementImpl) refElement).checkFlag(CanBeFinalAnnotator.CAN_BE_FINAL_MASK))
return null;
final PsiMember psiMember = (PsiMember) refElement.getElement();
if (psiMember == null || !CanBeFinalHandler.allowToBeFinal(psiMember)) return null;
PsiIdentifier psiIdentifier = null;
if (refElement instanceof RefClass) {
RefClass refClass = (RefClass) refElement;
if (refClass.isInterface() || refClass.isAnonymous() || refClass.isAbstract()) return null;
if (!isReportClasses()) return null;
psiIdentifier = ((PsiClass) psiMember).getNameIdentifier();
} else if (refElement instanceof RefMethod) {
RefMethod refMethod = (RefMethod) refElement;
if (refMethod.getOwnerClass().isFinal()) return null;
if (!isReportMethods()) return null;
psiIdentifier = ((PsiMethod) psiMember).getNameIdentifier();
} else if (refElement instanceof RefField) {
if (!isReportFields()) return null;
psiIdentifier = ((PsiField) psiMember).getNameIdentifier();
}
if (psiIdentifier != null) {
return new ProblemDescriptor[] {
manager.createProblemDescriptor(
psiIdentifier,
InspectionsBundle.message("inspection.export.results.can.be.final.description"),
new AcceptSuggested(globalContext.getRefManager()),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
false)
};
}
}
return null;
}
public static ArrayList<RefParameter> getUnusedParameters(RefMethod refMethod) {
boolean checkDeep = !refMethod.isStatic() && !refMethod.isConstructor();
ArrayList<RefParameter> res = new ArrayList<RefParameter>();
RefParameter[] methodParameters = refMethod.getParameters();
RefParameter[] result = new RefParameter[methodParameters.length];
System.arraycopy(methodParameters, 0, result, 0, methodParameters.length);
clearUsedParameters(refMethod, result, checkDeep);
for (RefParameter parameter : result) {
if (parameter != null) {
res.add(parameter);
}
}
return res;
}
private static void traverseSuperMethods(
RefMethod refMethod,
GlobalJavaInspectionContext globalContext,
GlobalJavaInspectionContext.UsagesProcessor processor) {
final Collection<RefMethod> superMethods = refMethod.getSuperMethods();
for (RefMethod superMethod : superMethods) {
traverseSuperMethods(superMethod, globalContext, processor);
}
globalContext.enqueueMethodUsagesProcessor(refMethod, processor);
}
@Override
public CommonProblemDescriptor[] checkElement(
@NotNull RefEntity refEntity,
@NotNull AnalysisScope scope,
@NotNull final InspectionManager manager,
@NotNull final GlobalInspectionContext globalContext) {
if (refEntity instanceof RefMethod) {
RefMethod refMethod = (RefMethod) refEntity;
if (!refMethod.isReferenced()) return null;
if (hasNonInvertedCalls(refMethod)) return null;
if (!refMethod.getSuperMethods().isEmpty()) return null;
final PsiMethod psiMethod = (PsiMethod) refMethod.getElement();
final PsiIdentifier psiIdentifier = psiMethod.getNameIdentifier();
if (psiIdentifier != null) {
final Collection<RefElement> inReferences = refMethod.getInReferences();
if (inReferences.size() == 1) {
final RefElement refElement = inReferences.iterator().next();
final PsiElement usagesContainer = refElement.getElement();
if (usagesContainer == null) return null;
if (ReferencesSearch.search(psiMethod, new LocalSearchScope(usagesContainer))
.forEach(
new Processor<PsiReference>() {
private final Set<PsiReference> myFoundRefs = new HashSet<>();
@Override
public boolean process(PsiReference reference) {
myFoundRefs.add(reference);
return myFoundRefs.size() < 2;
}
})) return null;
}
return new ProblemDescriptor[] {
manager.createProblemDescriptor(
psiIdentifier,
InspectionsBundle.message("boolean.method.is.always.inverted.problem.descriptor"),
(LocalQuickFix) getQuickFix(null),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
false)
};
}
}
return null;
}
private boolean isAccessible(
RefJavaElement to, @PsiModifier.ModifierConstant String accessModifier) {
for (RefElement refElement : to.getInReferences()) {
if (!isAccessibleFrom(refElement, to, accessModifier)) return false;
}
if (to instanceof RefMethod) {
RefMethod refMethod = (RefMethod) to;
if (refMethod.isAbstract()
&& (refMethod.getDerivedMethods().isEmpty()
|| refMethod.getAccessModifier() == PsiModifier.PRIVATE)) return false;
for (RefMethod refOverride : refMethod.getDerivedMethods()) {
if (!isAccessibleFrom(refOverride, to, accessModifier)) return false;
}
for (RefMethod refSuper : refMethod.getSuperMethods()) {
if (RefJavaUtil.getInstance().compareAccess(refSuper.getAccessModifier(), accessModifier)
> 0) return false;
}
}
if (to instanceof RefClass) {
RefClass refClass = (RefClass) to;
for (RefClass subClass : refClass.getSubClasses()) {
if (!isAccessibleFrom(subClass, to, accessModifier)) return false;
}
List children = refClass.getChildren();
if (children != null) {
for (Object refElement : children) {
if (!isAccessible((RefJavaElement) refElement, accessModifier)) return false;
}
}
for (final RefElement refElement : refClass.getInTypeReferences()) {
if (!isAccessibleFrom(refElement, refClass, accessModifier)) return false;
}
List<RefJavaElement> classExporters = ((RefClassImpl) refClass).getClassExporters();
if (classExporters != null) {
for (RefJavaElement refExporter : classExporters) {
if (getAccessLevel(accessModifier) < getAccessLevel(refExporter.getAccessModifier()))
return false;
}
}
}
return true;
}
@Nullable
public CommonProblemDescriptor[] checkElement(
RefEntity refEntity,
AnalysisScope scope,
InspectionManager manager,
GlobalInspectionContext globalContext,
ProblemDescriptionsProcessor processor) {
ArrayList<ProblemDescriptor> problems = null;
if (refEntity instanceof RefMethod) {
final RefMethod refMethod = (RefMethod) refEntity;
if (refMethod.hasSuperMethods()) return null;
if (refMethod.isEntry()) return null;
RefParameter[] parameters = refMethod.getParameters();
for (RefParameter refParameter : parameters) {
String value = refParameter.getActualValueIfSame();
if (value != null) {
if (problems == null) problems = new ArrayList<ProblemDescriptor>(1);
final String paramName = refParameter.getName();
problems.add(
manager.createProblemDescriptor(
refParameter.getElement(),
InspectionsBundle.message(
"inspection.same.parameter.problem.descriptor",
"<code>" + paramName + "</code>",
"<code>" + value + "</code>"),
new InlineParameterValueFix(paramName, value),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
false));
}
}
}
return problems == null ? null : problems.toArray(new CommonProblemDescriptor[problems.size()]);
}
@Nullable
public CommonProblemDescriptor[] checkElement(
final RefEntity refEntity,
final AnalysisScope scope,
final InspectionManager manager,
final GlobalInspectionContext globalContext,
final ProblemDescriptionsProcessor processor) {
if (refEntity instanceof RefMethod) {
final RefMethod refMethod = (RefMethod) refEntity;
if (refMethod.isSyntheticJSP()) return null;
if (refMethod.isExternalOverride()) return null;
if (!(refMethod.isStatic() || refMethod.isConstructor())
&& !refMethod.getSuperMethods().isEmpty()) return null;
if ((refMethod.isAbstract() || refMethod.getOwnerClass().isInterface())
&& refMethod.getDerivedMethods().isEmpty()) return null;
if (RefUtil.isEntryPoint(refMethod)) return null;
if (refMethod.isAppMain()) return null;
final ArrayList<RefParameter> unusedParameters = getUnusedParameters(refMethod);
if (unusedParameters.isEmpty()) return null;
final List<ProblemDescriptor> result = new ArrayList<ProblemDescriptor>();
for (RefParameter refParameter : unusedParameters) {
final PsiIdentifier psiIdentifier = refParameter.getElement().getNameIdentifier();
if (psiIdentifier != null) {
result.add(
manager.createProblemDescriptor(
psiIdentifier,
refMethod.isAbstract()
? InspectionsBundle.message("inspection.unused.parameter.composer")
: InspectionsBundle.message("inspection.unused.parameter.composer1"),
new AcceptSuggested(
globalContext.getRefManager(), processor, refParameter.toString()),
ProblemHighlightType.LIKE_UNUSED_SYMBOL,
false));
}
}
return result.toArray(new CommonProblemDescriptor[result.size()]);
}
return null;
}
@Override
public void onReferencesBuild(RefElement refElement) {
if (refElement instanceof RefClass) {
final PsiClass psiClass = (PsiClass) refElement.getElement();
if (psiClass != null) {
if (refElement.isEntry()) {
((RefClassImpl) refElement).setFlag(false, CAN_BE_FINAL_MASK);
}
PsiMethod[] psiMethods = psiClass.getMethods();
PsiField[] psiFields = psiClass.getFields();
HashSet<PsiVariable> allFields = new HashSet<PsiVariable>();
ContainerUtil.addAll(allFields, psiFields);
ArrayList<PsiVariable> instanceInitializerInitializedFields = new ArrayList<PsiVariable>();
boolean hasInitializers = false;
for (PsiClassInitializer initializer : psiClass.getInitializers()) {
PsiCodeBlock body = initializer.getBody();
hasInitializers = true;
ControlFlow flow;
try {
flow =
ControlFlowFactory.getInstance(body.getProject())
.getControlFlow(
body, LocalsOrMyInstanceFieldsControlFlowPolicy.getInstance(), false);
} catch (AnalysisCanceledException e) {
flow = ControlFlow.EMPTY;
}
Collection<PsiVariable> writtenVariables = new ArrayList<PsiVariable>();
ControlFlowUtil.getWrittenVariables(flow, 0, flow.getSize(), false, writtenVariables);
for (PsiVariable psiVariable : writtenVariables) {
if (allFields.contains(psiVariable)) {
if (instanceInitializerInitializedFields.contains(psiVariable)) {
allFields.remove(psiVariable);
instanceInitializerInitializedFields.remove(psiVariable);
} else {
instanceInitializerInitializedFields.add(psiVariable);
}
}
}
for (PsiVariable psiVariable : writtenVariables) {
if (!instanceInitializerInitializedFields.contains(psiVariable)) {
allFields.remove(psiVariable);
}
}
}
for (PsiMethod psiMethod : psiMethods) {
if (psiMethod.isConstructor()) {
PsiCodeBlock body = psiMethod.getBody();
if (body != null) {
hasInitializers = true;
ControlFlow flow;
try {
flow =
ControlFlowFactory.getInstance(body.getProject())
.getControlFlow(
body, LocalsOrMyInstanceFieldsControlFlowPolicy.getInstance(), false);
} catch (AnalysisCanceledException e) {
flow = ControlFlow.EMPTY;
}
Collection<PsiVariable> writtenVariables =
ControlFlowUtil.getWrittenVariables(flow, 0, flow.getSize(), false);
for (PsiVariable psiVariable : writtenVariables) {
if (instanceInitializerInitializedFields.contains(psiVariable)) {
allFields.remove(psiVariable);
instanceInitializerInitializedFields.remove(psiVariable);
}
}
List<PsiMethod> redirectedConstructors =
HighlightControlFlowUtil.getChainedConstructors(psiMethod);
if (redirectedConstructors == null || redirectedConstructors.isEmpty()) {
List<PsiVariable> ssaVariables = ControlFlowUtil.getSSAVariables(flow);
ArrayList<PsiVariable> good = new ArrayList<PsiVariable>(ssaVariables);
good.addAll(instanceInitializerInitializedFields);
allFields.retainAll(good);
} else {
allFields.removeAll(writtenVariables);
}
}
}
}
for (PsiField psiField : psiFields) {
if ((!hasInitializers || !allFields.contains(psiField))
&& psiField.getInitializer() == null) {
final RefFieldImpl refField = (RefFieldImpl) myManager.getReference(psiField);
if (refField != null) {
refField.setFlag(false, CAN_BE_FINAL_MASK);
}
}
}
}
} else if (refElement instanceof RefMethod) {
final RefMethod refMethod = (RefMethod) refElement;
if (refMethod.isEntry()) {
((RefMethodImpl) refMethod).setFlag(false, CAN_BE_FINAL_MASK);
}
}
}
public void appendReferencePresentation(
RefEntity refElement, final StringBuffer buf, final boolean isPackageIncluded) {
if (refElement instanceof RefImplicitConstructor) {
buf.append(InspectionsBundle.message("inspection.export.results.implicit.constructor"));
refElement = ((RefImplicitConstructor) refElement).getOwnerClass();
}
buf.append(HTMLComposerImpl.CODE_OPENING);
if (refElement instanceof RefField) {
RefField field = (RefField) refElement;
PsiField psiField = field.getElement();
buf.append(psiField.getType().getPresentableText());
buf.append(HTMLComposerImpl.NBSP);
} else if (refElement instanceof RefMethod) {
RefMethod method = (RefMethod) refElement;
PsiMethod psiMethod = (PsiMethod) method.getElement();
PsiType returnType = psiMethod.getReturnType();
if (returnType != null) {
buf.append(returnType.getPresentableText());
buf.append(HTMLComposerImpl.NBSP);
}
}
buf.append(HTMLComposerImpl.A_HREF_OPENING);
if (myComposer.myExporter == null) {
buf.append(((RefElementImpl) refElement).getURL());
} else {
buf.append(myComposer.myExporter.getURL(refElement));
}
buf.append("\">");
if (refElement instanceof RefClass && ((RefClass) refElement).isAnonymous()) {
buf.append(InspectionsBundle.message("inspection.reference.anonymous"));
} else if (refElement instanceof RefJavaElement
&& ((RefJavaElement) refElement).isSyntheticJSP()) {
buf.append(XmlStringUtil.escapeString(refElement.getName()));
} else if (refElement instanceof RefMethod) {
PsiMethod psiMethod = (PsiMethod) ((RefMethod) refElement).getElement();
buf.append(psiMethod.getName());
} else {
buf.append(refElement.getName());
}
buf.append(HTMLComposerImpl.A_CLOSING);
if (refElement instanceof RefMethod) {
PsiMethod psiMethod = (PsiMethod) ((RefMethod) refElement).getElement();
appendMethodParameters(buf, psiMethod, false);
}
buf.append(HTMLComposerImpl.CODE_CLOSING);
if (refElement instanceof RefClass && ((RefClass) refElement).isAnonymous()) {
buf.append(" ");
buf.append(InspectionsBundle.message("inspection.export.results.anonymous.ref.in.owner"));
buf.append(" ");
myComposer.appendElementReference(
buf, ((RefElement) refElement.getOwner()), isPackageIncluded);
} else if (isPackageIncluded) {
buf.append(" ").append(HTMLComposerImpl.CODE_OPENING).append("(");
myComposer.appendQualifiedName(buf, refElement.getOwner());
// buf.append(RefUtil.getPackageName(refElement));
buf.append(")").append(HTMLComposerImpl.CODE_CLOSING);
}
}
@Override
@Nullable
public CommonProblemDescriptor[] checkElement(
@NotNull final RefEntity refEntity,
@NotNull final AnalysisScope scope,
@NotNull final InspectionManager manager,
@NotNull final GlobalInspectionContext globalContext,
@NotNull final ProblemDescriptionsProcessor processor) {
if (refEntity instanceof RefJavaElement) {
final RefJavaElement refElement = (RefJavaElement) refEntity;
if (refElement instanceof RefParameter) return null;
if (refElement.isSyntheticJSP()) return null;
// ignore entry points.
if (refElement.isEntry()) return null;
// ignore implicit constructors. User should not be able to see them.
if (refElement instanceof RefImplicitConstructor) return null;
if (refElement instanceof RefField
&& ((RefField) refElement).getElement() instanceof PsiEnumConstant) return null;
// ignore library override methods.
if (refElement instanceof RefMethod) {
RefMethod refMethod = (RefMethod) refElement;
if (refMethod.isExternalOverride()) return null;
if (refMethod.isEntry()) return null;
}
// ignore anonymous classes. They do not have access modifiers.
if (refElement instanceof RefClass) {
RefClass refClass = (RefClass) refElement;
if (refClass.isAnonymous()
|| refClass.isEntry()
|| refClass.isTestCase()
|| refClass.isServlet()
|| refClass.isApplet()
|| refClass.isLocalClass()) return null;
if (isTopLevelClass(refClass) && !SUGGEST_PACKAGE_LOCAL_FOR_TOP_CLASSES) return null;
}
// ignore unreferenced code. They could be a potential entry points.
if (refElement.getInReferences().isEmpty()) return null;
// ignore interface members. They always have public access modifier.
if (refElement.getOwner() instanceof RefClass) {
RefClass refClass = (RefClass) refElement.getOwner();
if (refClass.isInterface()) return null;
}
String access = getPossibleAccess(refElement);
if (access != refElement.getAccessModifier() && access != null) {
final PsiElement element = refElement.getElement();
final PsiElement nameIdentifier =
element != null ? HighlightUsagesHandler.getNameIdentifier(element) : null;
if (nameIdentifier != null) {
return new ProblemDescriptor[] {
manager.createProblemDescriptor(
nameIdentifier,
access.equals(PsiModifier.PRIVATE)
? CAN_BE_PRIVATE
: access.equals(PsiModifier.PACKAGE_LOCAL)
? CAN_BE_PACKAGE_LOCAL
: CAN_BE_PROTECTED,
new AcceptSuggestedAccess(globalContext.getRefManager(), access),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
false)
};
}
}
}
return null;
}