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validation.rs
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validation.rs
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use std::collections::{hash_map, HashMap, HashSet};
use std::fmt::Debug;
use std::hash::Hash;
use crate::ast;
use crate::diagnostic::{self, Diagnostic, DiagnosticKind};
use crate::parser::ParseFileResult;
use crate::traverse;
pub(crate) fn validate<ID>(
keys: HashMap<String, ast::ResolvedItemKind>,
lalrpop_results: HashMap<ID, ParseFileResult<ID>>,
) -> HashMap<ID, ParseFileResult<ID>>
where
ID: Eq + Hash + Clone + Debug,
{
// Defined imports: all the imported item keys + add the Android built-in (as unknown)
let defined = keys;
lalrpop_results
.into_iter()
.map(|(id, mut fr)| {
let mut ast = match fr.ast {
Some(f) => f,
None => return (id, ParseFileResult { ast: None, ..fr }),
};
// Imports as qualified names
let imports: HashSet<String> =
ast.imports.iter().map(|i| i.get_qualified_name()).collect();
// Declared parcelables as qualified names
let declared_parcelables: HashSet<String> = ast
.declared_parcelables
.iter()
.map(|i| i.get_qualified_name())
.collect();
// Resolve types (check custom types and set definition if found in imports)
let resolved = resolve_types(
&mut ast,
&imports,
&declared_parcelables,
&defined,
&mut fr.diagnostics,
);
// Check imports (e.g. unresolved, unused, duplicated)
let import_map = check_imports(&ast.imports, &resolved, &defined, &mut fr.diagnostics);
// Check declared parcelables
check_declared_parcelables(
&ast.declared_parcelables,
&import_map,
&resolved,
&mut fr.diagnostics,
);
// Check containers (e.g.: map parameters)
check_containers(&ast, &mut fr.diagnostics);
if let ast::Item::Interface(ref mut interface) = ast.item {
// Set up oneway interface (adjust methods to be oneway)
set_up_oneway_interface(interface, &mut fr.diagnostics);
}
// Check methods (e.g.: return type of async methods)
check_methods(&ast, &mut fr.diagnostics);
// Sort diagnostics by line
fr.diagnostics.sort_by_key(|d| d.range.start.line_col.0);
(
id,
ParseFileResult {
ast: Some(ast),
..fr
},
)
})
.collect()
}
fn set_up_oneway_interface(interface: &mut ast::Interface, diagnostics: &mut Vec<Diagnostic>) {
if !interface.oneway {
return;
}
interface
.elements
.iter_mut()
.filter_map(|el| match el {
ast::InterfaceElement::Const(_) => None,
ast::InterfaceElement::Method(m) => Some(m),
})
.for_each(|method| {
if method.oneway {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
range: method.oneway_range.clone(),
message: format!(
"Method `{}` of oneway interface does not need to be marked as oneway",
method.name
),
context_message: Some("redundant oneway".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
message: "oneway interface".to_owned(),
range: interface.symbol_range.clone(),
}]),
});
} else {
// Force me
method.oneway = true;
}
});
}
fn resolve_types(
ast: &mut ast::Aidl,
imports: &HashSet<String>,
declared_parcelables: &HashSet<String>,
defined: &HashMap<String, ast::ResolvedItemKind>,
diagnostics: &mut Vec<Diagnostic>,
) -> HashSet<String> {
let mut resolved = HashSet::new();
traverse::walk_types_mut(ast, |type_: &mut ast::Type| {
resolve_type(type_, imports, declared_parcelables, defined, diagnostics);
match &type_.kind {
ast::TypeKind::ResolvedItem(key, _) => {
resolved.insert(key.clone());
}
ast::TypeKind::CharSequence => {
resolved.insert("java.lang.CharSequence".to_owned());
}
ast::TypeKind::String => {
resolved.insert("java.lang.String".to_owned());
}
ast::TypeKind::AndroidType(a) => {
resolved.insert(a.get_qualified_name().to_owned());
}
_ => (),
}
});
resolved
}
fn resolve_type(
type_: &mut ast::Type,
imports: &HashSet<String>,
declared_parcelables: &HashSet<String>,
defined: &HashMap<String, ast::ResolvedItemKind>,
diagnostics: &mut Vec<Diagnostic>,
) {
if type_.kind != ast::TypeKind::Unresolved {
return;
}
// Unresolved type has the full qualification of a built-in Android type (e.g. android.os.IBinder)?
let opt_android = ast::AndroidTypeKind::from_qualified_name(&type_.name);
if let Some(android) = opt_android {
if android.can_be_qualified() || imports.contains(&type_.name) {
type_.kind = ast::TypeKind::AndroidType(android);
return;
}
}
// Unresolved type is in import path?
if let Some(import_path) = imports.iter().find(|import_path| {
&type_.name == *import_path || import_path.ends_with(&format!(".{}", type_.name))
}) {
if let Some(item_kind) = defined.get(import_path) {
// Imported type is defined => set resolved item
type_.kind = ast::TypeKind::ResolvedItem(import_path.to_owned(), item_kind.clone());
return;
}
// Imported but not defined => set resolved item as unknown import
type_.kind = ast::TypeKind::ResolvedItem(
import_path.to_owned(),
ast::ResolvedItemKind::UnknownImport,
);
return;
}
// Unresolved type is forward-declared?
// Note: it is supposed to only work with path
if let Some(import_path) = declared_parcelables
.iter()
.find(|import_path| &type_.name == *import_path && !import_path.contains('.'))
{
// Set resolved item as forward-declared parcelable
type_.kind = ast::TypeKind::ResolvedItem(
import_path.to_owned(),
ast::ResolvedItemKind::ForwardDeclaredParcelable,
);
return;
}
// Unresolved type has the full qualification of a built-in Android type (e.g. android.os.IBinder)?
let opt_android = ast::AndroidTypeKind::from_qualified_name(&type_.name);
if let Some(android) = opt_android {
if android.can_be_qualified() {
type_.kind = ast::TypeKind::AndroidType(android);
return;
}
} else {
// Unresolved type has the name of a built-in Android type (e.g. aIBinder)?
let opt_android = ast::AndroidTypeKind::from_name(&type_.name);
if let Some(android) = opt_android {
type_.kind = ast::TypeKind::AndroidType(android);
return;
}
}
// Unresolved type
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: type_.symbol_range.clone(),
message: format!("Unknown type `{}`", type_.name),
context_message: Some("unknown type".to_owned()),
hint: None,
related_infos: Vec::new(),
});
}
fn check_imports<'a>(
imports: &'a [ast::Import],
resolved: &'a HashSet<String>,
defined: &'a HashMap<String, ast::ResolvedItemKind>,
diagnostics: &mut Vec<Diagnostic>,
) -> HashMap<String, &'a ast::Import> {
// - detect duplicated imports
// - create map of "qualified name" -> Import
let imports: HashMap<String, &ast::Import> =
imports.iter().fold(HashMap::new(), |mut map, import| {
match map.entry(import.get_qualified_name()) {
hash_map::Entry::Occupied(previous) => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: import.symbol_range.clone(),
message: format!("Duplicated import `{}`", import.get_qualified_name()),
context_message: Some("duplicated import".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
message: "previous location".to_owned(),
range: previous.get().symbol_range.clone(),
}]),
});
}
hash_map::Entry::Vacant(v) => {
v.insert(import);
}
}
map
});
// - generate diagnostics for unused and unresolved imports
for (qualified_import, import) in imports.iter() {
if !defined.contains_key(qualified_import)
&& ast::AndroidTypeKind::from_qualified_name(qualified_import).is_none()
{
// No item can be found with the given import path
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
range: import.symbol_range.clone(),
message: format!("Unresolved import `{qualified_import}`"),
context_message: Some("unresolved import".to_owned()),
hint: Some(
"Note: this is fine if your client is able to import the same item".to_owned(),
),
related_infos: Vec::new(),
});
} else if !resolved.contains(qualified_import) {
// No type resolved for this import
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
range: import.symbol_range.clone(),
message: format!("Unused import `{qualified_import}`"),
context_message: Some("unused import".to_owned()),
hint: None,
related_infos: Vec::new(),
});
}
}
imports
}
fn check_declared_parcelables(
declared_parcelables: &[ast::Import],
imports: &HashMap<String, &ast::Import>,
resolved: &HashSet<String>,
diagnostics: &mut Vec<Diagnostic>,
) {
// - detect duplicated parcelables (or name which was already imported)
// - create map "qualified name" -> Import
let declared_parcelables: HashMap<String, &ast::Import> =
declared_parcelables
.iter()
.fold(HashMap::new(), |mut map, declared_parcelable| {
let qualified_name = declared_parcelable.get_qualified_name();
if let Some((_, conflicting_import)) = imports
.iter()
.find(|(_, import)| import.name == declared_parcelable.name)
{
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: declared_parcelable.symbol_range.clone(),
message: format!(
"Declared parcelable conflicts with import `{}`",
conflicting_import.get_qualified_name()
),
context_message: Some("conflicting declaration".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
message: "location of conflicting import".to_owned(),
range: conflicting_import.symbol_range.clone(),
}]),
});
return map;
}
match map.entry(qualified_name.clone()) {
hash_map::Entry::Occupied(previous) => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: declared_parcelable.symbol_range.clone(),
message: format!("Multiple parcelable declarations `{qualified_name}`"),
context_message: Some("duplicated declaration".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
message: "previous location".to_owned(),
range: previous.get().symbol_range.clone(),
}]),
});
}
hash_map::Entry::Vacant(v) => {
v.insert(declared_parcelable);
}
}
map
});
// - generate diagnostics for unrecommended usage and for unused declared parcelables
for (qualified_import, declared_parcelable) in declared_parcelables.into_iter() {
if !resolved.contains(&qualified_import) {
// No type resolved for this import
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
range: declared_parcelable.symbol_range.clone(),
message: format!("Unused declared parcelable `{}`", declared_parcelable.name),
context_message: Some("unused declared parcelable".to_owned()),
hint: None,
related_infos: Vec::new(),
});
} else {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
range: declared_parcelable.full_range.clone(),
message: format!("Usage of declared parcelable `{}`", declared_parcelable.name),
context_message: Some(String::from("declared parcelable")),
hint: Some(String::from("It is recommended to define parcelables in AIDL to garantee compatilibity between languages")),
related_infos: Vec::new(),
});
}
}
}
fn check_containers(ast: &ast::Aidl, diagnostics: &mut Vec<Diagnostic>) {
traverse::walk_types(ast, |type_: &ast::Type| check_container(type_, diagnostics));
}
fn check_container(type_: &ast::Type, diagnostics: &mut Vec<Diagnostic>) {
match &type_.kind {
ast::TypeKind::Array => {
let value_type = &type_.generic_types[0];
check_array_element(value_type, diagnostics);
}
ast::TypeKind::List => {
// Handle wrong number of generics
match type_.generic_types.len() {
0 => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
message: String::from("Declaring a non-generic list is not recommended"),
context_message: Some("non-generic list".to_owned()),
range: type_.symbol_range.clone(),
hint: Some("consider adding a parameter (e.g.: List<String>)".to_owned()),
related_infos: Vec::new(),
});
return;
}
1 => (),
_ => unreachable!(), // handled via lalrpop rule
}
let value_type = &type_.generic_types[0];
check_list_element(value_type, diagnostics);
}
ast::TypeKind::Map => {
// Handle wrong number of generics
match type_.generic_types.len() {
0 => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Warning,
message: String::from("Declaring a non-generic map is not recommended"),
context_message: Some("non-generic map".to_owned()),
range: type_.symbol_range.clone(),
hint: Some(
"consider adding key and value parameters (e.g.: Map<String, String>)"
.to_owned(),
),
related_infos: Vec::new(),
});
return;
}
2 => (),
_ => unreachable!(), // handled via lalrpop rule
}
// Handle invalid generic types
check_map_key(&type_.generic_types[0], diagnostics);
check_map_value(&type_.generic_types[1], diagnostics);
}
_ => {}
};
}
fn check_methods(file: &ast::Aidl, diagnostics: &mut Vec<Diagnostic>) {
let mut method_names: HashMap<String, &ast::Method> = HashMap::new();
let mut first_method_without_id: Option<&ast::Method> = None;
let mut first_method_with_id: Option<&ast::Method> = None;
let mut method_ids: HashMap<u32, &ast::Method> = HashMap::new();
traverse::walk_methods(file, |method: &ast::Method| {
// Check individual method (e.g. return value, args, ...)
check_method(method, diagnostics);
if let Some(previous) = method_names.get(&method.name) {
// Found already exists => ERROR
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: method.symbol_range.clone(),
message: format!("Duplicated method name `{}`", method.name),
context_message: Some("duplicated method name".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
message: "previous location".to_owned(),
range: previous.symbol_range.clone(),
}]),
});
return;
}
method_names.insert(method.name.clone(), method);
let is_mixed_now_with_id = first_method_with_id.is_none()
&& first_method_without_id.is_some()
&& method.transact_code.is_some();
let is_mixed_now_without_id = first_method_without_id.is_none()
&& !method_ids.is_empty()
&& method.transact_code.is_none();
if is_mixed_now_with_id || is_mixed_now_without_id {
let info_previous = if is_mixed_now_with_id {
diagnostic::RelatedInfo {
message: "method without id".to_owned(),
range: first_method_without_id
.as_ref()
.unwrap()
.transact_code_range
.clone(),
}
} else {
diagnostic::RelatedInfo {
message: "method with id".to_owned(),
range: first_method_with_id
.as_ref()
.unwrap()
.transact_code_range
.clone(),
}
};
// Methods are mixed (with/without id)
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: method.transact_code_range.clone(),
message: String::from("Mixed usage of method ids"),
context_message: None,
hint: Some(String::from(
"Either all methods should have an id or none of them",
)),
related_infos: Vec::from([info_previous]),
});
}
if method.transact_code.is_some() {
// First method with id
if first_method_with_id.is_none() {
first_method_with_id = Some(method);
}
} else {
// First method without id
if first_method_without_id.is_none() {
first_method_without_id = Some(method);
}
}
if let Some(id) = method.transact_code {
match method_ids.entry(id) {
hash_map::Entry::Occupied(oe) => {
// Method id already defined
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
range: method.transact_code_range.clone(),
message: String::from("Duplicated method id"),
context_message: Some("duplicated import".to_owned()),
hint: None,
related_infos: Vec::from([diagnostic::RelatedInfo {
range: oe.get().transact_code_range.clone(),
message: String::from("previous method"),
}]),
});
}
hash_map::Entry::Vacant(ve) => {
// First method with this id
ve.insert(method);
}
}
}
});
}
fn check_method(method: &ast::Method, diagnostics: &mut Vec<Diagnostic>) {
if method.oneway && method.return_type.kind != ast::TypeKind::Void {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!(
"Invalid return type of async method `{}`",
method.return_type.name,
),
context_message: Some("must be void".to_owned()),
range: method.return_type.symbol_range.clone(),
hint: Some("return type of async methods must be `void`".to_owned()),
related_infos: Vec::new(),
});
}
check_method_args(method, diagnostics);
}
// Check arg direction (e.g. depending on type or method being oneway)
fn check_method_args(method: &ast::Method, diagnostics: &mut Vec<Diagnostic>) {
for arg in &method.args {
// Range of direction (or position of arg type)
let range = match &arg.direction {
ast::Direction::In(range)
| ast::Direction::Out(range)
| ast::Direction::InOut(range) => range.clone(),
ast::Direction::Unspecified => ast::Range {
start: arg.arg_type.symbol_range.start.clone(),
end: arg.arg_type.symbol_range.start.clone(),
},
};
match get_requirement_for_arg_direction(&arg.arg_type) {
RequirementForArgDirection::DirectionRequired(for_elements) => {
if arg.direction == ast::Direction::Unspecified {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Missing direction for `{}`", arg.arg_type.name,),
context_message: Some("missing direction".to_owned()),
range: range.clone(),
hint: Some(format!("direction is required for {for_elements}")),
related_infos: Vec::new(),
});
}
}
RequirementForArgDirection::CanOnlyBeInOrUnspecified(for_elements) => {
if !matches!(
arg.direction,
ast::Direction::Unspecified | ast::Direction::In(_)
) {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid direction for `{}`", arg.arg_type.name),
context_message: Some("invalid direction".to_owned()),
range: range.clone(),
hint: Some(format!("{for_elements} can only be `in` or omitted")),
related_infos: Vec::new(),
});
}
}
RequirementForArgDirection::CanOnlyBeInOrInOut(for_elements) => {
if !matches!(
arg.direction,
ast::Direction::In(_) | ast::Direction::InOut(_)
) {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid direction for `{}`", arg.arg_type.name),
context_message: Some("invalid direction".to_owned()),
range: range.clone(),
hint: Some(if matches!(arg.direction, ast::Direction::Out(_)) {
format!("{for_elements} cannot be out")
} else {
format!("{for_elements} must be specified")
}),
related_infos: Vec::new(),
});
}
}
RequirementForArgDirection::CannotBeAnArg(for_elements) => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid argument `{}`", arg.arg_type.name,),
context_message: Some("invalid argument".to_owned()),
range: range.clone(),
hint: Some(format!("{for_elements} cannot be an argument")),
related_infos: Vec::new(),
});
}
RequirementForArgDirection::NoRequirement => (),
}
if method.oneway
&& matches!(
arg.direction,
ast::Direction::Out(_) | ast::Direction::InOut(_)
)
{
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid direction for `{}`", arg.arg_type.name),
context_message: Some("invalid direction".to_owned()),
range,
hint: Some(
"arguments of oneway methods can be neither `out` nor `inout`".to_owned(),
),
related_infos: Vec::new(),
});
}
}
}
// Parameters describe for which elements the requirement applies
enum RequirementForArgDirection {
DirectionRequired(&'static str),
CanOnlyBeInOrUnspecified(&'static str),
CanOnlyBeInOrInOut(&'static str),
CannotBeAnArg(&'static str),
NoRequirement,
}
fn get_requirement_for_arg_direction(type_: &ast::Type) -> RequirementForArgDirection {
match type_.kind {
ast::TypeKind::Primitive => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("primitives")
}
ast::TypeKind::Void => RequirementForArgDirection::CanOnlyBeInOrUnspecified("void"),
ast::TypeKind::Array => RequirementForArgDirection::DirectionRequired("arrays"),
ast::TypeKind::Map | ast::TypeKind::List => {
RequirementForArgDirection::DirectionRequired("maps")
}
ast::TypeKind::String => RequirementForArgDirection::CanOnlyBeInOrUnspecified("strings"),
ast::TypeKind::CharSequence => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("CharSequence")
}
ast::TypeKind::AndroidType(ast::AndroidTypeKind::IBinder) => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("IBinder")
}
ast::TypeKind::AndroidType(ast::AndroidTypeKind::FileDescriptor) => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("FileDescriptor")
}
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelFileDescriptor) => {
RequirementForArgDirection::CanOnlyBeInOrInOut("ParcelFileDescriptor")
} // because it is not default-constructible
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelableHolder) => {
RequirementForArgDirection::CannotBeAnArg("ParcelableHolder")
}
ast::TypeKind::ResolvedItem(
_,
ast::ResolvedItemKind::Parcelable | ast::ResolvedItemKind::ForwardDeclaredParcelable,
) => RequirementForArgDirection::DirectionRequired("parcelables"),
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Interface) => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("interfaces")
}
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Enum) => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("enums")
}
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::UnknownImport) => {
RequirementForArgDirection::CanOnlyBeInOrUnspecified("objects")
}
ast::TypeKind::Unresolved => RequirementForArgDirection::NoRequirement,
}
}
// Can only have one dimensional arrays
// "Binder" type cannot be an array (with interface element...)
// TODO: not allowed for ParcelableHolder, allowed for IBinder, ...
fn check_array_element(type_: &ast::Type, diagnostics: &mut Vec<Diagnostic>) {
let ok = match type_.kind {
// Not OK (custom diagnostic and return)
ast::TypeKind::Array => {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: String::from("Unsupported multi-dimensional array"),
context_message: Some("unsupported array".to_owned()),
range: type_.symbol_range.clone(),
hint: Some("must be one-dimensional".to_owned()),
related_infos: Vec::new(),
});
return;
}
ast::TypeKind::Primitive => true,
ast::TypeKind::String => true,
ast::TypeKind::CharSequence => false,
ast::TypeKind::List => false,
ast::TypeKind::Map => false,
ast::TypeKind::Void => false,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::IBinder) => true,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::FileDescriptor) => true,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelFileDescriptor) => true,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelableHolder) => false,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Parcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Interface) => false,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Enum) => true, // OK: enum is backed by a primitive
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::ForwardDeclaredParcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::UnknownImport) => true, // OK: it is an unknown object
ast::TypeKind::Unresolved => true, // we don't know
};
if !ok {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid array element `{}`", type_.name),
context_message: Some("invalid parameter".to_owned()),
range: type_.symbol_range.clone(),
hint: Some(
"must be a primitive, an enum, a String, a parcelable or a IBinder".to_owned(),
),
related_infos: Vec::new(),
});
}
}
// List<T> supports parcelable/union, String, IBinder, and ParcelFileDescriptor
fn check_list_element(type_: &ast::Type, diagnostics: &mut Vec<Diagnostic>) {
let ok = match type_.kind {
ast::TypeKind::Array => false,
ast::TypeKind::List => false,
ast::TypeKind::Map => false,
ast::TypeKind::Primitive => false,
ast::TypeKind::String => true,
ast::TypeKind::CharSequence => false,
ast::TypeKind::Void => false,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::IBinder) => true,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::FileDescriptor) => false,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelFileDescriptor) => true,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelableHolder) => false,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Parcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Interface) => false,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Enum) => false, // NO: enum is backed by a primitive
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::ForwardDeclaredParcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::UnknownImport) => true, // OK: it is an (unknown) object
ast::TypeKind::Unresolved => true, // we don't know
};
if !ok {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid list element `{}`", type_.name),
context_message: Some("invalid element".to_owned()),
range: type_.symbol_range.clone(),
hint: Some(
"must be a parcelable/enum, a String, a IBinder or a ParcelFileDescriptor"
.to_owned(),
),
related_infos: Vec::new(),
});
}
}
// The type of key in map must be String
fn check_map_key(type_: &ast::Type, diagnostics: &mut Vec<Diagnostic>) {
if !matches!(type_.kind, ast::TypeKind::String if type_.name == "String") {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid map key `{}`", type_.name),
context_message: Some("invalid map key".to_owned()),
range: type_.symbol_range.clone(),
hint: Some(
"must be a parcelable/enum, a String, a IBinder or a ParcelFileDescriptor"
.to_owned(),
),
related_infos: Vec::new(),
});
}
}
// A generic type cannot have any primitive type parameters
fn check_map_value(type_: &ast::Type, diagnostics: &mut Vec<Diagnostic>) {
let ok = match type_.kind {
ast::TypeKind::Array => true,
ast::TypeKind::List => true,
ast::TypeKind::Map => true,
ast::TypeKind::String => true,
ast::TypeKind::CharSequence => true,
ast::TypeKind::Primitive => false,
ast::TypeKind::Void => false,
ast::TypeKind::AndroidType(_) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Parcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Interface) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::Enum) => false,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::ForwardDeclaredParcelable) => true,
ast::TypeKind::ResolvedItem(_, ast::ResolvedItemKind::UnknownImport) => true,
ast::TypeKind::Unresolved => true, // we don't know
};
if !ok {
diagnostics.push(Diagnostic {
kind: DiagnosticKind::Error,
message: format!("Invalid map value `{}`", type_.name),
context_message: Some("invalid map value".to_owned()),
range: type_.symbol_range.clone(),
hint: Some("cannot not be a primitive".to_owned()),
related_infos: Vec::new(),
});
}
}
#[cfg(test)]
#[allow(clippy::single_element_loop)]
mod tests {
use self::utils::create_method_with_name_and_id;
use super::*;
use crate::ast;
#[test]
fn test_check_resolve_type() {
let defined = HashMap::from([]);
{
// IBinder properly resolved
let mut t = utils::create_unresolved_type(
ast::AndroidTypeKind::IBinder.get_name(),
1,
);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&HashSet::new(),
&defined,
&mut diagnostics,
);
assert_eq!(
t.kind,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::IBinder)
);
assert_eq!(diagnostics.len(), 0);
}
{
// android.os.IBinder not properly resolved
let mut t = utils::create_unresolved_type(
ast::AndroidTypeKind::IBinder.get_qualified_name(),
1,
);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&HashSet::new(),
&defined,
&mut diagnostics,
);
assert_eq!(t.kind, ast::TypeKind::Unresolved);
assert_eq!(diagnostics.len(), 1); // Error because type is not resolved
}
{
// android.os.ParcelFileDescriptor
let mut t = utils::create_unresolved_type(
ast::AndroidTypeKind::ParcelFileDescriptor.get_qualified_name(),
1,
);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&HashSet::new(),
&defined,
&mut diagnostics,
);
assert_eq!(
t.kind,
ast::TypeKind::AndroidType(ast::AndroidTypeKind::ParcelFileDescriptor)
);
assert_eq!(diagnostics.len(), 0);
}
{
// UnknownType
let mut t = utils::create_unresolved_type("UnknownType", 1);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&HashSet::new(),
&defined,
&mut diagnostics,
);
assert_eq!(t.kind, ast::TypeKind::Unresolved);
assert_eq!(diagnostics.len(), 1);
}
{
// UnknownType but imported
let mut t = utils::create_unresolved_type("UnknownType", 1);
let imports = HashSet::from(["path.to.UnknownType".to_owned()]);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&imports,
&HashSet::new(),
&defined,
&mut diagnostics,
);
assert_eq!(
t.kind,
ast::TypeKind::ResolvedItem(
"path.to.UnknownType".to_owned(),
ast::ResolvedItemKind::UnknownImport
)
);
assert_eq!(diagnostics.len(), 0);
}
{
// Forward-declared parcelable
let mut t = utils::create_unresolved_type("ForwardDeclaredParcelable", 1);
let declared_parcelables = HashSet::from(["ForwardDeclaredParcelable".to_owned()]);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&declared_parcelables,
&defined,
&mut diagnostics,
);
assert_eq!(
t.kind,
ast::TypeKind::ResolvedItem(
"ForwardDeclaredParcelable".to_owned(),
ast::ResolvedItemKind::ForwardDeclaredParcelable
)
);
assert_eq!(diagnostics.len(), 0);
}
{
// Forward-declared parcelable (with path, which is not supposed to work)
let mut t = utils::create_unresolved_type("ForwardDeclaredParcelable", 1);
let declared_parcelables =
HashSet::from(["path.to.ForwardDeclaredParcelable".to_owned()]);
let mut diagnostics = Vec::new();
resolve_type(
&mut t,
&HashSet::new(),
&declared_parcelables,
&defined,
&mut diagnostics,
);
assert_eq!(t.kind, ast::TypeKind::Unresolved);
assert_eq!(diagnostics.len(), 1);
}
}
#[test]
fn test_check_imports() {
let imports = Vec::from([
utils::create_import("test.path", "TestParcelable", 1),
utils::create_import("test.path", "TestParcelable", 2),
utils::create_import("test.path", "TestInterface", 3),
utils::create_import("test.path", "UnusedEnum", 4),
utils::create_import("test.path", "NonExisting", 5),
utils::create_import("android.os", "IBinder", 6),
utils::create_import("android.os", "ParcelFileDescriptor", 7),
]);
let resolved = HashSet::from([
"test.path.TestParcelable".into(),