private static AllowedValues getAllowedValuesFromMagic(
@NotNull PsiModifierListOwner element, @NotNull PsiType type, PsiAnnotation magic) {
if (magic == null) return null;
PsiAnnotationMemberValue[] allowedValues;
final boolean canBeOred;
if (TypeConversionUtil.getTypeRank(type) <= TypeConversionUtil.LONG_RANK) {
PsiAnnotationMemberValue intValues = magic.findAttributeValue("intValues");
allowedValues =
intValues instanceof PsiArrayInitializerMemberValue
? ((PsiArrayInitializerMemberValue) intValues).getInitializers()
: PsiAnnotationMemberValue.EMPTY_ARRAY;
if (allowedValues.length == 0) {
PsiAnnotationMemberValue orValue = magic.findAttributeValue("flags");
allowedValues =
orValue instanceof PsiArrayInitializerMemberValue
? ((PsiArrayInitializerMemberValue) orValue).getInitializers()
: PsiAnnotationMemberValue.EMPTY_ARRAY;
canBeOred = true;
} else {
canBeOred = false;
}
} else if (type.equals(
PsiType.getJavaLangString(
element.getManager(), GlobalSearchScope.allScope(element.getProject())))) {
PsiAnnotationMemberValue strValuesAttr = magic.findAttributeValue("stringValues");
allowedValues =
strValuesAttr instanceof PsiArrayInitializerMemberValue
? ((PsiArrayInitializerMemberValue) strValuesAttr).getInitializers()
: PsiAnnotationMemberValue.EMPTY_ARRAY;
canBeOred = false;
} else {
return null; // other types not supported
}
if (allowedValues.length != 0) {
return new AllowedValues(allowedValues, canBeOred);
}
// last resort: try valuesFromClass
PsiAnnotationMemberValue[] values = readFromClass("valuesFromClass", magic, type);
boolean ored = false;
if (values == null) {
values = readFromClass("flagsFromClass", magic, type);
ored = true;
}
if (values == null) return null;
return new AllowedValues(values, ored);
}
private static PsiAnnotationMemberValue[] readFromClass(
@NonNls String attributeName, @NotNull PsiAnnotation magic, PsiType type) {
PsiAnnotationMemberValue fromClassAttr = magic.findAttributeValue(attributeName);
PsiType fromClassType =
fromClassAttr instanceof PsiClassObjectAccessExpression
? ((PsiClassObjectAccessExpression) fromClassAttr).getOperand().getType()
: null;
PsiClass fromClass =
fromClassType instanceof PsiClassType ? ((PsiClassType) fromClassType).resolve() : null;
if (fromClass == null) return null;
String fqn = fromClass.getQualifiedName();
if (fqn == null) return null;
List<PsiAnnotationMemberValue> constants = new ArrayList<PsiAnnotationMemberValue>();
for (PsiField field : fromClass.getFields()) {
if (!field.hasModifierProperty(PsiModifier.PUBLIC)
|| !field.hasModifierProperty(PsiModifier.STATIC)
|| !field.hasModifierProperty(PsiModifier.FINAL)) continue;
PsiType fieldType = field.getType();
if (!Comparing.equal(fieldType, type)) continue;
PsiAssignmentExpression e =
(PsiAssignmentExpression)
JavaPsiFacade.getElementFactory(field.getProject())
.createExpressionFromText("x=" + fqn + "." + field.getName(), field);
PsiReferenceExpression refToField = (PsiReferenceExpression) e.getRExpression();
constants.add(refToField);
}
if (constants.isEmpty()) return null;
return constants.toArray(new PsiAnnotationMemberValue[constants.size()]);
}
static AllowedValues getAllowedValues(
@NotNull PsiModifierListOwner element, PsiType type, Set<PsiClass> visited) {
PsiAnnotation[] annotations = AnnotationUtil.getAllAnnotations(element, true, null);
for (PsiAnnotation annotation : annotations) {
AllowedValues values;
if (type != null && MagicConstant.class.getName().equals(annotation.getQualifiedName())) {
// PsiAnnotation magic = AnnotationUtil.findAnnotationInHierarchy(element,
// Collections.singleton(MagicConstant.class.getName()));
values = getAllowedValuesFromMagic(element, type, annotation);
if (values != null) return values;
}
PsiJavaCodeReferenceElement ref = annotation.getNameReferenceElement();
PsiElement resolved = ref == null ? null : ref.resolve();
if (!(resolved instanceof PsiClass) || !((PsiClass) resolved).isAnnotationType()) continue;
PsiClass aClass = (PsiClass) resolved;
if (visited == null) visited = new THashSet<PsiClass>();
if (!visited.add(aClass)) continue;
values = getAllowedValues(aClass, type, visited);
if (values != null) return values;
}
return parseBeanInfo(element);
}
private static AllowedValues parseBeanInfo(@NotNull PsiModifierListOwner owner) {
PsiMethod method = null;
if (owner instanceof PsiParameter) {
PsiParameter parameter = (PsiParameter) owner;
PsiElement scope = parameter.getDeclarationScope();
if (!(scope instanceof PsiMethod)) return null;
PsiElement nav = scope.getNavigationElement();
if (!(nav instanceof PsiMethod)) return null;
method = (PsiMethod) nav;
if (method.isConstructor()) {
// not a property, try the @ConstructorProperties({"prop"})
PsiAnnotation annotation =
AnnotationUtil.findAnnotation(method, "java.beans.ConstructorProperties");
if (annotation == null) return null;
PsiAnnotationMemberValue value = annotation.findAttributeValue("value");
if (!(value instanceof PsiArrayInitializerMemberValue)) return null;
PsiAnnotationMemberValue[] initializers =
((PsiArrayInitializerMemberValue) value).getInitializers();
PsiElement parent = parameter.getParent();
if (!(parent instanceof PsiParameterList)) return null;
int index = ((PsiParameterList) parent).getParameterIndex(parameter);
if (index >= initializers.length) return null;
PsiAnnotationMemberValue initializer = initializers[index];
if (!(initializer instanceof PsiLiteralExpression)) return null;
Object val = ((PsiLiteralExpression) initializer).getValue();
if (!(val instanceof String)) return null;
PsiMethod setter =
PropertyUtil.findPropertySetter(
method.getContainingClass(), (String) val, false, false);
if (setter == null) return null;
// try the @beaninfo of the corresponding setter
method = (PsiMethod) setter.getNavigationElement();
}
} else if (owner instanceof PsiMethod) {
PsiElement nav = owner.getNavigationElement();
if (!(nav instanceof PsiMethod)) return null;
method = (PsiMethod) nav;
}
if (method == null) return null;
PsiClass aClass = method.getContainingClass();
if (aClass == null) return null;
if (PropertyUtil.isSimplePropertyGetter(method)) {
List<PsiMethod> setters =
PropertyUtil.getSetters(aClass, PropertyUtil.getPropertyNameByGetter(method));
if (setters.size() != 1) return null;
method = setters.get(0);
}
if (!PropertyUtil.isSimplePropertySetter(method)) return null;
PsiDocComment doc = method.getDocComment();
if (doc == null) return null;
PsiDocTag beaninfo = doc.findTagByName("beaninfo");
if (beaninfo == null) return null;
String data =
StringUtil.join(
beaninfo.getDataElements(),
new Function<PsiElement, String>() {
@Override
public String fun(PsiElement element) {
return element.getText();
}
},
"\n");
int enumIndex = StringUtil.indexOfSubstringEnd(data, "enum:");
if (enumIndex == -1) return null;
data = data.substring(enumIndex);
int colon = data.indexOf(":");
int last = colon == -1 ? data.length() : data.substring(0, colon).lastIndexOf("\n");
data = data.substring(0, last);
List<PsiAnnotationMemberValue> values = new ArrayList<PsiAnnotationMemberValue>();
for (String line : StringUtil.splitByLines(data)) {
List<String> words = StringUtil.split(line, " ", true, true);
if (words.size() != 2) continue;
String ref = words.get(1);
PsiExpression constRef =
JavaPsiFacade.getElementFactory(aClass.getProject())
.createExpressionFromText(ref, aClass);
if (!(constRef instanceof PsiReferenceExpression)) continue;
PsiReferenceExpression expr = (PsiReferenceExpression) constRef;
values.add(expr);
}
if (values.isEmpty()) return null;
PsiAnnotationMemberValue[] array = values.toArray(new PsiAnnotationMemberValue[values.size()]);
return new AllowedValues(array, false);
}