@Nullable
private static String getTypeName(PsiType type, boolean withIndices) {
type = type.getDeepComponentType();
if (type instanceof PsiClassType) {
final PsiClassType classType = (PsiClassType) type;
final String className = classType.getClassName();
if (className != null || !withIndices) return className;
final PsiClass aClass = classType.resolve();
return aClass instanceof PsiAnonymousClass
? ((PsiAnonymousClass) aClass).getBaseClassType().getClassName()
: null;
} else if (type instanceof PsiPrimitiveType) {
return type.getPresentableText();
} else if (type instanceof PsiWildcardType) {
return getTypeName(((PsiWildcardType) type).getExtendsBound(), withIndices);
} else if (type instanceof PsiIntersectionType) {
return getTypeName(((PsiIntersectionType) type).getRepresentative(), withIndices);
} else if (type instanceof PsiCapturedWildcardType) {
return getTypeName(((PsiCapturedWildcardType) type).getWildcard(), withIndices);
} else if (type instanceof PsiDisjunctionType) {
return getTypeName(((PsiDisjunctionType) type).getLeastUpperBound(), withIndices);
} else {
return null;
}
}
@Nullable
private PsiType extractListTypeFromContainingClass(
PsiElement element) {
PsiClass listClass = PsiTreeUtil.getParentOfType(element,
PsiClass.class);
if (listClass == null) {
return null;
}
final PsiMethod[] getMethods =
listClass.findMethodsByName("get", true);
if (getMethods.length == 0) {
return null;
}
final PsiType type = getMethods[0].getReturnType();
if (!(type instanceof PsiClassType)) {
return null;
}
final PsiClassType classType = (PsiClassType)type;
final PsiClass parameterClass = classType.resolve();
if (parameterClass == null) {
return null;
}
PsiClass subClass = null;
while (listClass != null && !listClass.hasTypeParameters()) {
subClass = listClass;
listClass = listClass.getSuperClass();
}
if (listClass == null || subClass == null) {
return TypeUtils.getObjectType(element);
}
final PsiTypeParameter[] typeParameters =
listClass.getTypeParameters();
if (!parameterClass.equals(typeParameters[0])) {
return TypeUtils.getObjectType(element);
}
final PsiReferenceList extendsList = subClass.getExtendsList();
if (extendsList == null) {
return null;
}
final PsiJavaCodeReferenceElement[] referenceElements =
extendsList.getReferenceElements();
if (referenceElements.length == 0) {
return null;
}
final PsiType[] types =
referenceElements[0].getTypeParameters();
if (types.length == 0) {
return TypeUtils.getObjectType(element);
}
return types[0];
}