@NotNull
public static Object[] getReferenceVariantsByFilter(
@NotNull PsiJavaCodeReferenceElement reference, @NotNull ElementFilter filter) {
FilterScopeProcessor processor = new FilterScopeProcessor(filter);
PsiScopesUtil.resolveAndWalk(processor, reference, null, true);
return processor.getResults().toArray();
}
private static void addAvailableMethodsOfType(
final PsiClassType type,
final PsiLiteralExpression context,
final Collection<String> result) {
PsiScopesUtil.treeWalkUp(
new PsiScopeProcessor() {
@Override
public boolean execute(@NotNull PsiElement element, @NotNull ResolveState state) {
if (element instanceof PsiMethod) {
PsiMethod method = (PsiMethod) element;
PsiType returnType = method.getReturnType();
if (returnType != null
&& TypeConversionUtil.isAssignable(type, returnType)
&& method.getParameterList().getParametersCount() == 0) {
result.add(method.getName() + "()");
}
}
return true;
}
@Override
public <T> T getHint(@NotNull Key<T> hintKey) {
return null;
}
@Override
public void handleEvent(@NotNull Event event, Object associated) {}
},
context,
null);
}
@Nullable
public static PsiType getQualifiedMemberReferenceType(
@Nullable PsiType qualifierType, @NotNull final PsiMember member) {
final Ref<PsiSubstitutor> subst = Ref.create(PsiSubstitutor.EMPTY);
class MyProcessor extends BaseScopeProcessor implements NameHint, ElementClassHint {
@Override
public boolean execute(@NotNull PsiElement element, @NotNull ResolveState state) {
if (element == member) {
subst.set(state.get(PsiSubstitutor.KEY));
}
return true;
}
@Override
public String getName(@NotNull ResolveState state) {
return member.getName();
}
@Override
public boolean shouldProcess(DeclarationKind kind) {
return member instanceof PsiEnumConstant
? kind == DeclarationKind.ENUM_CONST
: member instanceof PsiField
? kind == DeclarationKind.FIELD
: kind == DeclarationKind.METHOD;
}
@Override
public <T> T getHint(@NotNull Key<T> hintKey) {
return hintKey == NameHint.KEY || hintKey == ElementClassHint.KEY ? (T) this : null;
}
}
PsiScopesUtil.processTypeDeclarations(qualifierType, member, new MyProcessor());
PsiType rawType =
member instanceof PsiField
? ((PsiField) member).getType()
: member instanceof PsiMethod
? ((PsiMethod) member).getReturnType()
: JavaPsiFacade.getElementFactory(member.getProject())
.createType((PsiClass) member);
return subst.get().substitute(rawType);
}
@Nullable
private static PsiExpression createDefaultValue(
JavaChangeInfo changeInfo,
final PsiElementFactory factory,
final JavaParameterInfo info,
final PsiExpressionList list)
throws IncorrectOperationException {
if (info.isUseAnySingleVariable()) {
final PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(list.getProject()).getResolveHelper();
final PsiType type = info.getTypeWrapper().getType(changeInfo.getMethod(), list.getManager());
final VariablesProcessor processor =
new VariablesProcessor(false) {
protected boolean check(PsiVariable var, ResolveState state) {
if (var instanceof PsiField
&& !resolveHelper.isAccessible((PsiField) var, list, null)) return false;
if (var instanceof PsiLocalVariable
&& list.getTextRange().getStartOffset() <= var.getTextRange().getStartOffset())
return false;
if (PsiTreeUtil.isAncestor(var, list, false)) return false;
final PsiType varType = state.get(PsiSubstitutor.KEY).substitute(var.getType());
return type.isAssignableFrom(varType);
}
public boolean execute(PsiElement pe, ResolveState state) {
super.execute(pe, state);
return size() < 2;
}
};
PsiScopesUtil.treeWalkUp(processor, list, null);
if (processor.size() == 1) {
final PsiVariable result = processor.getResult(0);
return factory.createExpressionFromText(result.getName(), list);
}
if (processor.size() == 0) {
final PsiClass parentClass = PsiTreeUtil.getParentOfType(list, PsiClass.class);
if (parentClass != null) {
PsiClass containingClass = parentClass;
final Set<PsiClass> containingClasses = new HashSet<PsiClass>();
while (containingClass != null) {
if (type.isAssignableFrom(factory.createType(containingClass, PsiSubstitutor.EMPTY))) {
containingClasses.add(containingClass);
}
containingClass = PsiTreeUtil.getParentOfType(containingClass, PsiClass.class);
}
if (containingClasses.size() == 1) {
return RefactoringUtil.createThisExpression(
parentClass.getManager(),
containingClasses.contains(parentClass)
? null
: containingClasses.iterator().next());
}
}
}
}
final PsiCallExpression callExpression =
PsiTreeUtil.getParentOfType(list, PsiCallExpression.class);
final String defaultValue = info.getDefaultValue();
return callExpression != null
? info.getValue(callExpression)
: defaultValue.length() > 0 ? factory.createExpressionFromText(defaultValue, list) : null;
}
protected boolean processUnqualifiedVariants(final PsiScopeProcessor processor) {
return PsiScopesUtil.treeWalkUp(processor, this, null);
}