/**
* Resolves a type by looking up its first component in the scope, and subsequent components as
* properties. The scope must have been fully parsed and a symbol table constructed.
*
* @return The type of the symbol, or null if the type could not be found.
*/
private JSType lookupViaProperties(ErrorReporter reporter, StaticTypedScope<JSType> enclosing) {
String[] componentNames = reference.split("\\.", -1);
if (componentNames[0].length() == 0) {
return null;
}
StaticTypedSlot<JSType> slot = enclosing.getSlot(componentNames[0]);
if (slot == null) {
return null;
}
// If the first component has a type of 'Unknown', then any type
// names using it should be regarded as silently 'Unknown' rather than be
// noisy about it.
JSType slotType = slot.getType();
if (slotType == null || slotType.isAllType() || slotType.isNoType()) {
return null;
}
JSType value = getTypedefType(reporter, slot);
if (value == null) {
return null;
}
// resolving component by component
for (int i = 1; i < componentNames.length; i++) {
ObjectType parentClass = ObjectType.cast(value);
if (parentClass == null) {
return null;
}
if (componentNames[i].length() == 0) {
return null;
}
value = parentClass.getPropertyType(componentNames[i]);
}
return value;
}
private JSType getTypedefType(ErrorReporter t, StaticTypedSlot<JSType> slot) {
JSType type = slot.getType();
if (type != null) {
return type;
}
handleUnresolvedType(t, true);
return null;
}
