/**
* Rebind val to name in ctx, and make sure that all intermediate contexts exist
*
* @param ctx the parent JNDI Context under which value will be bound
* @param name the name relative to ctx where value will be bound
* @param value the value to bind.
* @throws javax.naming.NamingException for any error
*/
public static void rebind(final Context ctx, final Name name, final Object value)
throws NamingException {
final int size = name.size();
final String atom = name.get(size - 1);
final Context parentCtx = createSubcontext(ctx, name.getPrefix(size - 1));
parentCtx.rebind(atom, value);
}
/**
* Remove leading or trailing empty components from name. Eg "/comp/env/" -> "comp/env"
*
* @param name the name to normalize
* @return normalized name
*/
public Name toCanonicalName(Name name) {
Name canonicalName = name;
if (name != null) {
if (canonicalName.size() > 1) {
if (canonicalName.get(0).equals("")) canonicalName = canonicalName.getSuffix(1);
if (canonicalName.get(canonicalName.size() - 1).equals(""))
canonicalName = canonicalName.getPrefix(canonicalName.size() - 1);
}
}
return canonicalName;
}
/**
* Unbinds a name from ctx, and removes parents if they are empty
*
* @param ctx the parent JNDI Context under which the name will be unbound
* @param name The name to unbind
* @throws javax.naming.NamingException for any error
*/
public static void unbind(Context ctx, Name name) throws NamingException {
ctx.unbind(name); // unbind the end node in the name
int sz = name.size();
// walk the tree backwards, stopping at the domain
while (--sz > 0) {
Name pname = name.getPrefix(sz);
try {
ctx.destroySubcontext(pname);
} catch (NamingException e) {
// log.trace("Unable to remove context " + pname, e);
break;
}
}
}
/**
* Lookup link bound to name
*
* @param name name of link binding
* @return LinkRef or plain object bound at name
* @exception NamingException if an error occurs
*/
public Object lookupLink(Name name) throws NamingException {
Name cname = toCanonicalName(name);
if (cname == null) {
NamingContext ctx = new NamingContext(_env, _name, _parent, _parser);
ctx._bindings = _bindings;
return ctx;
}
if (cname.size() == 0) throw new NamingException("Name is empty");
if (cname.size() == 1) {
Binding binding = getBinding(cname);
if (binding == null) throw new NameNotFoundException();
Object o = binding.getObject();
// handle links by looking up the link
if (o instanceof Reference) {
// deference the object
try {
return NamingManager.getObjectInstance(o, cname.getPrefix(1), this, _env);
} catch (NamingException e) {
throw e;
} catch (Exception e) {
__log.warn("", e);
throw new NamingException(e.getMessage());
}
} else {
// object is either a LinkRef which we don't dereference
// or a plain object in which case spec says we return it
return o;
}
}
// it is a multipart name, recurse to the first subcontext
String firstComponent = cname.get(0);
Object ctx = null;
if (firstComponent.equals("")) ctx = this;
else {
Binding binding = getBinding(firstComponent);
if (binding == null) throw new NameNotFoundException();
ctx = binding.getObject();
if (ctx instanceof Reference) {
// deference the object
try {
ctx =
NamingManager.getObjectInstance(
ctx, getNameParser("").parse(firstComponent), this, _env);
} catch (NamingException e) {
throw e;
} catch (Exception e) {
__log.warn("", e);
throw new NamingException(e.getMessage());
}
}
}
if (!(ctx instanceof Context)) throw new NotContextException();
return ((Context) ctx).lookup(cname.getSuffix(1));
}
