public static boolean nameCanBeImported(@NotNull String fqName, @NotNull PsiElement context) {
final PsiClass containingClass = PsiTreeUtil.getParentOfType(context, PsiClass.class);
if (containingClass != null) {
if (fqName.equals(containingClass.getQualifiedName())) {
return true;
}
final String shortName = ClassUtil.extractClassName(fqName);
final PsiClass[] innerClasses = containingClass.getAllInnerClasses();
for (PsiClass innerClass : innerClasses) {
if (innerClass.hasModifierProperty(PsiModifier.PRIVATE)) {
continue;
}
if (innerClass.hasModifierProperty(PsiModifier.PACKAGE_LOCAL)) {
if (!ClassUtils.inSamePackage(innerClass, containingClass)) {
continue;
}
}
final String className = innerClass.getName();
if (shortName.equals(className)) {
return false;
}
}
PsiField field = containingClass.findFieldByName(shortName, false);
if (field != null) {
return false;
}
field = containingClass.findFieldByName(shortName, true);
if (field != null
&& PsiUtil.isAccessible(containingClass.getProject(), field, containingClass, null)) {
return false;
}
}
final PsiJavaFile file = PsiTreeUtil.getParentOfType(context, PsiJavaFile.class);
if (file == null) {
return false;
}
if (hasExactImportConflict(fqName, file)) {
return false;
}
if (hasOnDemandImportConflict(fqName, file, true)) {
return false;
}
if (containsConflictingReference(file, fqName)) {
return false;
}
if (containsConflictingClass(fqName, file)) {
return false;
}
return !containsConflictingClassName(fqName, file);
}
private void checkExpression(@NotNull PsiExpression expression) {
if (expression.getParent() instanceof PsiParenthesizedExpression) {
return;
}
final PsiType expressionType = expression.getType();
if (expressionType == null
|| expressionType.equals(PsiType.VOID)
|| !TypeConversionUtil.isPrimitiveAndNotNull(expressionType)) {
return;
}
final PsiPrimitiveType primitiveType = (PsiPrimitiveType) expressionType;
final PsiClassType boxedType = primitiveType.getBoxedType(expression);
if (boxedType == null) {
return;
}
final PsiType expectedType = ExpectedTypeUtils.findExpectedType(expression, false);
if (expectedType == null || ClassUtils.isPrimitive(expectedType)) {
return;
}
if (!expectedType.isAssignableFrom(boxedType)) {
// JLS 5.2 Assignment Conversion
// check if a narrowing primitive conversion is applicable
if (!(expectedType instanceof PsiClassType) || !PsiUtil.isConstantExpression(expression)) {
return;
}
final PsiClassType classType = (PsiClassType) expectedType;
final String className = classType.getCanonicalText();
if (!convertableBoxedClassNames.contains(className)) {
return;
}
if (!PsiType.BYTE.equals(expressionType)
&& !PsiType.CHAR.equals(expressionType)
&& !PsiType.SHORT.equals(expressionType)
&& !PsiType.INT.equals(expressionType)) {
return;
}
}
if (ignoreAddedToCollection && isAddedToCollection(expression)) {
return;
}
registerError(expression);
}