/** Is this type exactly the same type as the given type? */
public boolean isExactly(ProducedType type) {
if (getDeclaration() instanceof BottomType) {
return type.getDeclaration() instanceof BottomType;
} else if (getDeclaration() instanceof UnionType) {
List<ProducedType> cases = getCaseTypes();
if (type.getDeclaration() instanceof UnionType) {
List<ProducedType> otherCases = type.getCaseTypes();
if (cases.size() != otherCases.size()) {
return false;
} else {
for (ProducedType c : cases) {
boolean found = false;
for (ProducedType oc : otherCases) {
if (c.isExactly(oc)) {
found = true;
break;
}
}
if (!found) {
return false;
}
}
return true;
}
} else if (cases.size() == 1) {
ProducedType st = cases.get(0);
return st.isExactly(type);
} else {
return false;
}
} else if (getDeclaration() instanceof IntersectionType) {
List<ProducedType> types = getSatisfiedTypes();
if (type.getDeclaration() instanceof IntersectionType) {
List<ProducedType> otherTypes = type.getSatisfiedTypes();
if (types.size() != otherTypes.size()) {
return false;
} else {
for (ProducedType c : types) {
boolean found = false;
for (ProducedType oc : otherTypes) {
if (c.isExactly(oc)) {
found = true;
break;
}
}
if (!found) {
return false;
}
}
return true;
}
} else if (types.size() == 1) {
ProducedType st = types.get(0);
return st.isExactly(type);
} else {
return false;
}
} else if (type.getDeclaration() instanceof UnionType) {
List<ProducedType> otherCases = type.getCaseTypes();
if (otherCases.size() == 1) {
ProducedType st = otherCases.get(0);
return this.isExactly(st);
} else {
return false;
}
} else if (type.getDeclaration() instanceof IntersectionType) {
List<ProducedType> otherTypes = type.getSatisfiedTypes();
if (otherTypes.size() == 1) {
ProducedType st = otherTypes.get(0);
return this.isExactly(st);
} else {
return false;
}
} else {
if (!type.getDeclaration().equals(getDeclaration())) {
return false;
} else {
ProducedType qt = getQualifyingType();
ProducedType tqt = type.getQualifyingType();
if (qt == null) {
if (tqt != null) {
return false;
}
} else {
if (tqt == null) {
return false;
} else {
TypeDeclaration totd = (TypeDeclaration) type.getDeclaration().getContainer();
ProducedType tqts = tqt.getSupertype(totd);
TypeDeclaration otd = (TypeDeclaration) getDeclaration().getContainer();
ProducedType qts = qt.getSupertype(otd);
if (!qts.isExactly(tqts)) {
return false;
}
}
}
for (TypeParameter p : getDeclaration().getTypeParameters()) {
ProducedType arg = getTypeArguments().get(p);
ProducedType otherArg = type.getTypeArguments().get(p);
if (arg == null || otherArg == null) {
return false;
/*throw new RuntimeException(
"Missing type argument for: " +
p.getName() + " of " +
getDeclaration().getName());*/
} else if (!arg.isExactly(otherArg)) {
return false;
}
}
return true;
}
}
}
/** Is this type a subtype of the given type? Ignore a certain self type constraint. */
public boolean isSubtypeOf(ProducedType type, TypeDeclaration selfTypeToIgnore) {
if (getDeclaration() instanceof BottomType) {
return true;
} else if (type.getDeclaration() instanceof BottomType) {
return false;
} else if (getDeclaration() instanceof UnionType) {
for (ProducedType ct : getInternalCaseTypes()) {
if (ct == null || !ct.isSubtypeOf(type, selfTypeToIgnore)) {
return false;
}
}
return true;
} else if (type.getDeclaration() instanceof UnionType) {
for (ProducedType ct : type.getInternalCaseTypes()) {
if (ct != null && isSubtypeOf(ct, selfTypeToIgnore)) {
return true;
}
}
return false;
} else if (type.getDeclaration() instanceof IntersectionType) {
for (ProducedType ct : type.getInternalSatisfiedTypes()) {
if (ct != null && !isSubtypeOf(ct, selfTypeToIgnore)) {
return false;
}
}
return true;
} else if (getDeclaration() instanceof IntersectionType) {
for (ProducedType ct : getInternalSatisfiedTypes()) {
if (ct == null || ct.isSubtypeOf(type, selfTypeToIgnore)) {
return true;
}
}
return false;
} else {
ProducedType st = getSupertype(type.getDeclaration(), selfTypeToIgnore);
if (st == null) {
return false;
} else {
ProducedType stqt = st.getQualifyingType();
ProducedType tqt = type.getQualifyingType();
if (stqt == null) {
if (tqt != null) {
// probably extraneous!
return false;
}
} else {
if (tqt == null) {
// probably extraneous!
return false;
} else {
// note that the qualifying type of the
// given type may be an invariant subtype
// of the type that declares the member
// type, as long as it doesn't refine the
// member type
TypeDeclaration totd = (TypeDeclaration) type.getDeclaration().getContainer();
ProducedType tqts = tqt.getSupertype(totd);
if (!stqt.isSubtypeOf(tqts)) {
return false;
}
}
}
for (TypeParameter p : type.getDeclaration().getTypeParameters()) {
ProducedType arg = st.getTypeArguments().get(p);
ProducedType otherArg = type.getTypeArguments().get(p);
if (arg == null || otherArg == null) {
/*throw new RuntimeException("Missing type argument for type parameter: " +
p.getName() + " of " +
type.getDeclaration().getName());*/
return false;
} else if (p.isCovariant()) {
if (!arg.isSubtypeOf(otherArg)) {
return false;
}
} else if (p.isContravariant()) {
if (!otherArg.isSubtypeOf(arg)) {
return false;
}
} else {
if (!arg.isExactly(otherArg)) {
return false;
}
}
}
return true;
}
}
}
