private final boolean isCoerceableFromParameterizedType(ResolvedType other) {
if (!other.isParameterizedType()) return false;
ResolvedType myRawType = (ResolvedType) getRawType();
ResolvedType theirRawType = (ResolvedType) other.getRawType();
if (myRawType == theirRawType) {
if (getTypeParameters().length == other.getTypeParameters().length) {
// there's a chance it can be done
ResolvedType[] myTypeParameters = getResolvedTypeParameters();
ResolvedType[] theirTypeParameters = other.getResolvedTypeParameters();
for (int i = 0; i < myTypeParameters.length; i++) {
if (myTypeParameters[i] != theirTypeParameters[i]) {
// thin ice now... but List<String> may still be coerceable from e.g. List<T>
if (myTypeParameters[i].isGenericWildcard()) {
BoundedReferenceType wildcard = (BoundedReferenceType) myTypeParameters[i];
if (!wildcard.canBeCoercedTo(theirTypeParameters[i])) return false;
} else if (myTypeParameters[i].isTypeVariableReference()) {
TypeVariableReferenceType tvrt = (TypeVariableReferenceType) myTypeParameters[i];
TypeVariable tv = tvrt.getTypeVariable();
tv.resolve(world);
if (!tv.canBeBoundTo(theirTypeParameters[i])) return false;
} else if (theirTypeParameters[i].isTypeVariableReference()) {
TypeVariableReferenceType tvrt = (TypeVariableReferenceType) theirTypeParameters[i];
TypeVariable tv = tvrt.getTypeVariable();
tv.resolve(world);
if (!tv.canBeBoundTo(myTypeParameters[i])) return false;
} else {
return false;
}
}
}
return true;
}
} else {
// we do this walk for situations like the following:
// Base<T>, Sub<S,T> extends Base<S>
// is Sub<Y,Z> coerceable from Base<X> ???
for (Iterator i = getDirectSupertypes(); i.hasNext(); ) {
ReferenceType parent = (ReferenceType) i.next();
if (parent.isCoerceableFromParameterizedType(other)) return true;
}
}
return false;
}
