/**
* Implements resolving a NameComponent in this context and narrowing it to
* CosNaming::NamingContext. It will throw appropriate exceptions if not found or not narrowable.
*
* @param impl an implementation of NamingContextDataStore
* @param n a NameComponents which is the name to be found.
* @exception org.omg.CosNaming.NamingContextPackage.NotFound The first component could not be
* resolved.
* @exception org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving
* the first component of the supplied name.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
* @see resolve
*/
protected static NamingContext resolveFirstAsContext(
NamingContextDataStore impl, NameComponent[] n)
throws org.omg.CosNaming.NamingContextPackage.NotFound {
org.omg.CORBA.Object topRef = null;
BindingTypeHolder bth = new BindingTypeHolder();
NamingContext context = null;
synchronized (impl) {
// Resolve first - must be resolveable
topRef = impl.Resolve(n[0], bth);
if (topRef == null) {
// It was not bound
throw new NotFound(NotFoundReason.missing_node, n);
}
}
// Was it bound as a context?
if (bth.value != BindingType.ncontext) {
// It was not a context
throw new NotFound(NotFoundReason.not_context, n);
}
// Narrow to a naming context
try {
context = NamingContextHelper.narrow(topRef);
} catch (org.omg.CORBA.BAD_PARAM ex) {
// It was not a context
throw new NotFound(NotFoundReason.not_context, n);
}
// Hmm. must be ok
return context;
}
/**
* Implements resolving names in this NamingContext. The first component of the supplied name is
* resolved in this NamingContext by calling Resolve(). If there are no more components in the
* name, the resulting object reference is returned. Otherwise, the resulting object reference
* must have been bound as a context and be narrowable to a NamingContext. If this is the case,
* the remaining components of the name is resolved in the resulting NamingContext. This method is
* static for maximal reuse - even for extended naming context implementations where the recursive
* semantics still apply.
*
* @param impl an implementation of NamingContextDataStore
* @param n a sequence of NameComponents which is the name to be resolved.
* @return the object reference bound under the supplied name.
* @exception org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
* supplied, but the first component could not be resolved.
* @exception org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving
* the first component of the supplied name.
* @exception org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid
* (i.e., has length less than 1).
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
* @see resolve
*/
public static org.omg.CORBA.Object doResolve(NamingContextDataStore impl, NameComponent[] n)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName {
org.omg.CORBA.Object obj = null;
BindingTypeHolder bth = new BindingTypeHolder();
// Length must be greater than 0
if (n.length < 1) throw new InvalidName();
// The identifier must be set
if (n.length == 1) {
synchronized (impl) {
// Resolve first level in this context
obj = impl.Resolve(n[0], bth);
}
if (obj == null) {
// Object was not found
throw new NotFound(NotFoundReason.missing_node, n);
}
return obj;
} else {
// n.length > 1
if ((n[1].id.length() == 0) && (n[1].kind.length() == 0)) {
throw new InvalidName();
}
NamingContext context = resolveFirstAsContext(impl, n);
// Compute restOfName = name[1..length]
NameComponent[] tail = new NameComponent[n.length - 1];
System.arraycopy(n, 1, tail, 0, n.length - 1);
// Resolve rest of name in context
try {
// First try to resolve using the local call, this should work
// most of the time unless there are federated naming contexts.
Servant servant = impl.getNSPOA().reference_to_servant(context);
return doResolve(((NamingContextDataStore) servant), tail);
} catch (Exception e) {
return context.resolve(tail);
}
}
}
/**
* Implements all four flavors of binding. It uses Resolve() to check if a binding already exists
* (for bind and bind_context), and unbind() to ensure that a binding does not already exist. If
* the length of the name is 1, then Bind() is called with the name and the object to bind.
* Otherwise, the first component of the name is resolved in this NamingContext and the
* appropriate form of bind passed to the resulting NamingContext. This method is static for
* maximal reuse - even for extended naming context implementations where the recursive semantics
* still apply.
*
* @param impl an implementation of NamingContextDataStore
* @param n a sequence of NameComponents which is the name under which the object will be bound.
* @param obj the object reference to be bound.
* @param rebind Replace an existing binding or not.
* @param bt Type of binding (as object or as context).
* @exception org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
* supplied, but the first component could not be resolved.
* @exception org.omg.CosNaming.NamingContextPackage.CannotProceed Could not * proceed in
* resolving the first component of the supplied name.
* @exception org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid
* (i.e., has length less than 1).
* @exception org.omg.CosNaming.NamingContextPackage.AlreadyBound An object is already bound under
* the supplied name.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
* @see resolve
* @see unbind
* @see bind
* @see bind_context
* @see rebind
* @see rebind_context
*/
public static void doBind(
NamingContextDataStore impl,
NameComponent[] n,
org.omg.CORBA.Object obj,
boolean rebind,
org.omg.CosNaming.BindingType bt)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName,
org.omg.CosNaming.NamingContextPackage.AlreadyBound {
// Valid name?
if (n.length < 1) throw new InvalidName();
// At bottom level?
if (n.length == 1) {
// The identifier must be set
if ((n[0].id.length() == 0) && (n[0].kind.length() == 0)) {
throw new InvalidName();
}
// Ensure synchronization of backend
synchronized (impl) {
// Yes: bind object in this context under the name
BindingTypeHolder bth = new BindingTypeHolder();
if (rebind) {
org.omg.CORBA.Object objRef = impl.Resolve(n[0], bth);
if (objRef != null) {
// Refer Naming Service Doc:00-11-01 section 2.2.3.4
// If there is an object already bound with the name
// and the binding type is not ncontext a NotFound
// Exception with a reason of not a context has to be
// raised.
// Fix for bug Id: 4384628
if (bth.value.value() == BindingType.nobject.value()) {
if (bt.value() == BindingType.ncontext.value()) {
throw new NotFound(NotFoundReason.not_context, n);
}
} else {
// Previously a Context was bound and now trying to
// bind Object. It is invalid.
if (bt.value() == BindingType.nobject.value()) {
throw new NotFound(NotFoundReason.not_object, n);
}
}
impl.Unbind(n[0]);
}
} else {
if (impl.Resolve(n[0], bth) != null)
// "Resistence is futile." [Borg pickup line]
throw new AlreadyBound();
}
// Now there are no other bindings under this name
impl.Bind(n[0], obj, bt);
}
} else {
// No: bind in a different context
NamingContext context = resolveFirstAsContext(impl, n);
// Compute tail
NameComponent[] tail = new NameComponent[n.length - 1];
System.arraycopy(n, 1, tail, 0, n.length - 1);
// How should we propagate the bind
switch (bt.value()) {
case BindingType._nobject:
{
// Bind as object
if (rebind) context.rebind(tail, obj);
else context.bind(tail, obj);
}
break;
case BindingType._ncontext:
{
// Narrow to a naming context using Java casts. It must
// work.
NamingContext objContext = (NamingContext) obj;
// Bind as context
if (rebind) context.rebind_context(tail, objContext);
else context.bind_context(tail, objContext);
}
break;
default:
// This should not happen
throw staticWrapper.namingCtxBadBindingtype();
}
}
}