private Property getLeftmostProp(QualifiedName qname) {
String objName = qname.getLeftmostName();
Property p = props.get(objName);
if (p != null) {
return p;
}
if (nominalType != null) {
return nominalType.getProp(objName);
}
return builtinObject == null ? null : builtinObject.getProp(objName);
}
private static PersistentMap<String, Property> meetPropsHelper(
boolean specializeProps1,
NominalType resultNominalType,
PersistentMap<String, Property> props1,
PersistentMap<String, Property> props2) {
PersistentMap<String, Property> newProps = props1;
if (resultNominalType != null) {
for (Map.Entry<String, Property> propsEntry : props1.entrySet()) {
String pname = propsEntry.getKey();
Property nomProp = resultNominalType.getProp(pname);
if (nomProp != null) {
newProps =
addOrRemoveProp(specializeProps1, newProps, pname, nomProp, propsEntry.getValue());
if (newProps == BOTTOM_MAP) {
return BOTTOM_MAP;
}
}
}
}
for (Map.Entry<String, Property> propsEntry : props2.entrySet()) {
String pname = propsEntry.getKey();
Property prop2 = propsEntry.getValue();
Property newProp;
if (!props1.containsKey(pname)) {
newProp = prop2;
} else {
Property prop1 = props1.get(pname);
if (prop1.equals(prop2)) {
continue;
}
newProp = specializeProps1 ? prop1.specialize(prop2) : Property.meet(prop1, prop2);
}
if (resultNominalType != null && resultNominalType.getProp(pname) != null) {
Property nomProp = resultNominalType.getProp(pname);
newProps = addOrRemoveProp(specializeProps1, newProps, pname, nomProp, newProp);
if (newProps == BOTTOM_MAP) {
return BOTTOM_MAP;
}
} else {
if (newProp.getType().isBottom()) {
return BOTTOM_MAP;
}
newProps = newProps.with(pname, newProp);
}
}
return newProps;
}
private static Property getProp(Map<String, Property> props, NominalType nom, String pname) {
if (props.containsKey(pname)) {
return props.get(pname);
} else if (nom != null) {
return nom.getProp(pname);
}
return null;
}
private boolean isStructuralSubtypeOf(NominalType other, SubtypeCache subSuperMap) {
Preconditions.checkArgument(other.isStructuralInterface());
for (String pname : other.getAllPropsOfInterface()) {
Property prop2 = other.getProp(pname);
Property prop1 = this.getProp(pname);
if (prop2.isOptional()) {
if (prop1 != null && !prop1.getType().isSubtypeOf(prop2.getType(), subSuperMap)) {
return false;
}
} else if (prop1 == null
|| prop1.isOptional()
|| !prop1.getType().isSubtypeOf(prop2.getType(), subSuperMap)) {
return false;
}
}
return true;
}