/** Tests whether t1 is a subtype of t2, with respect to IGJ Subtyping rules */
@Override
public boolean isSubtype(AnnotatedTypeMirror sup, AnnotatedTypeMirror sub) {
// TODO: Check that they are up to the same base
// Err... cannot handle type variables quite yet
if (sup.getKind() == TypeKind.TYPEVAR
|| sup.getKind() == TypeKind.WILDCARD
|| sub.getKind() == TypeKind.TYPEVAR
|| sub.getKind() == TypeKind.WILDCARD) return true;
AnnotatedTypes annoUtils = new AnnotatedTypes(env, factory);
AnnotatedTypeMirror valueBaseType = annoUtils.asSuper(sub, sup);
if (valueBaseType == null)
// For now
valueBaseType = sub;
boolean isSubtype = isSubtypeOneLevel(sup, valueBaseType);
boolean typeArgShouldBeSame = sup.hasAnnotation(MUTABLE);
if ((sup.getKind() == TypeKind.DECLARED) && (valueBaseType.getKind() == TypeKind.DECLARED)) {
AnnotatedDeclaredType supDecl = (AnnotatedDeclaredType) sup;
AnnotatedDeclaredType subDecl = (AnnotatedDeclaredType) valueBaseType;
// if (supDecl.getTypeArguments().size() != subDecl.getTypeArguments().size())
// System.out.println("Investigate this " + supDecl + " " + subDecl);
for (int i = 0;
i < supDecl.getTypeArguments().size() && i < subDecl.getTypeArguments().size();
++i) {
AnnotatedTypeMirror supArg = supDecl.getTypeArguments().get(i);
AnnotatedTypeMirror subArg = subDecl.getTypeArguments().get(i);
if (typeArgShouldBeSame) isSubtype &= isSameImmutability(supArg, subArg);
else isSubtype &= isSubtype(supArg, subArg);
}
} else if ((sup.getKind() == TypeKind.ARRAY) && (valueBaseType.getKind() == TypeKind.ARRAY)) {
AnnotatedArrayType supArr = (AnnotatedArrayType) sup;
AnnotatedArrayType subArr = (AnnotatedArrayType) valueBaseType;
if (typeArgShouldBeSame)
isSubtype &= isSameImmutability(supArr.getComponentType(), subArr.getComponentType());
else isSubtype &= isSubtype(supArr.getComponentType(), subArr.getComponentType());
}
return isSubtype;
}
@Override
public final R visitArray(AnnotatedArrayType type, AnnotatedTypeMirror p) {
assert p instanceof AnnotatedArrayType : p;
R r = scan(type.getComponentType(), ((AnnotatedArrayType) p).getComponentType());
return r;
}