/**
* Destroys the named context and removes it from the namespace. Any attributes associated with
* the name are also removed. Intermediate contexts are not destroyed.
*
* <p>This method is idempotent. It succeeds even if the terminal atomic name is not bound in the
* target context, but throws NameNotFoundException if any of the intermediate contexts do not
* exist.
*
* <p>In a federated naming system, a context from one naming system may be bound to a name in
* another. One can subsequently look up and perform operations on the foreign context using a
* composite name. However, an attempt destroy the context using this composite name will fail
* with NotContextException, because the foreign context is not a "subcontext" of the context in
* which it is bound. Instead, use unbind() to remove the binding of the foreign context.
* Destroying the foreign context requires that the destroySubcontext() be performed on a context
* from the foreign context's "native" naming system.
*
* @param name the name of the context to be destroyed; may not be empty
* @exception NameNotFoundException if an intermediate context does not exist
* @exception NotContextException if the name is bound but does not name a context, or does not
* name a context of the appropriate type
*/
@Override
public void destroySubcontext(Name name) throws NamingException {
if (!checkWritable()) {
return;
}
while ((!name.isEmpty()) && (name.get(0).length() == 0)) name = name.getSuffix(1);
if (name.isEmpty()) throw new NamingException(sm.getString("namingContext.invalidName"));
NamingEntry entry = bindings.get(name.get(0));
if (entry == null) {
throw new NameNotFoundException(
sm.getString("namingContext.nameNotBound", name, name.get(0)));
}
if (name.size() > 1) {
if (entry.type == NamingEntry.CONTEXT) {
((Context) entry.value).destroySubcontext(name.getSuffix(1));
} else {
throw new NamingException(sm.getString("namingContext.contextExpected"));
}
} else {
if (entry.type == NamingEntry.CONTEXT) {
((Context) entry.value).close();
bindings.remove(name.get(0));
} else {
throw new NotContextException(sm.getString("namingContext.contextExpected"));
}
}
}
/**
* Retrieves the named object.
*
* @param name the name of the object to look up
* @param resolveLinks If true, the links will be resolved
* @return the object bound to name
* @exception NamingException if a naming exception is encountered
*/
protected Object lookup(Name name, boolean resolveLinks) throws NamingException {
// Removing empty parts
while ((!name.isEmpty()) && (name.get(0).length() == 0)) name = name.getSuffix(1);
if (name.isEmpty()) {
// If name is empty, a newly allocated naming context is returned
return new NamingContext(env, this.name, bindings);
}
NamingEntry entry = bindings.get(name.get(0));
if (entry == null) {
throw new NameNotFoundException(
sm.getString("namingContext.nameNotBound", name, name.get(0)));
}
if (name.size() > 1) {
// If the size of the name is greater that 1, then we go through a
// number of subcontexts.
if (entry.type != NamingEntry.CONTEXT) {
throw new NamingException(sm.getString("namingContext.contextExpected"));
}
return ((Context) entry.value).lookup(name.getSuffix(1));
} else {
if ((resolveLinks) && (entry.type == NamingEntry.LINK_REF)) {
String link = ((LinkRef) entry.value).getLinkName();
if (link.startsWith(".")) {
// Link relative to this context
return lookup(link.substring(1));
} else {
return (new InitialContext(env)).lookup(link);
}
} else if (entry.type == NamingEntry.REFERENCE) {
try {
// TODO ÐèѧϰNamingManager
Object obj = NamingManager.getObjectInstance(entry.value, name, this, env);
if (entry.value instanceof ResourceRef) {
boolean singleton =
Boolean.parseBoolean(
(String) ((ResourceRef) entry.value).get("singleton").getContent());
if (singleton) {
entry.type = NamingEntry.ENTRY;
entry.value = obj;
}
}
return obj;
} catch (NamingException e) {
throw e;
} catch (Exception e) {
log.warn(sm.getString("namingContext.failResolvingReference"), e);
throw new NamingException(e.getMessage());
}
} else {
return entry.value;
}
}
}
/**
* Binds a name to an object. All intermediate contexts and the target context (that named by all
* but terminal atomic component of the name) must already exist.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param rebind if true, then perform a rebind (ie, overwrite)
* @exception NameAlreadyBoundException if name is already bound
* @exception javax.naming.directory.InvalidAttributesException if object did not supply all
* mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
protected void bind(Name name, Object obj, boolean rebind) throws NamingException {
if (!checkWritable()) {
return;
}
while ((!name.isEmpty()) && (name.get(0).length() == 0)) name = name.getSuffix(1);
if (name.isEmpty()) throw new NamingException(sm.getString("namingContext.invalidName"));
NamingEntry entry = bindings.get(name.get(0));
if (name.size() > 1) {
if (entry == null) {
throw new NameNotFoundException(
sm.getString("namingContext.nameNotBound", name, name.get(0)));
}
if (entry.type == NamingEntry.CONTEXT) {
if (rebind) {
((Context) entry.value).rebind(name.getSuffix(1), obj);
} else {
((Context) entry.value).bind(name.getSuffix(1), obj);
}
} else {
throw new NamingException(sm.getString("namingContext.contextExpected"));
}
} else {
if ((!rebind) && (entry != null)) {
throw new NameAlreadyBoundException(
sm.getString("namingContext.alreadyBound", name.get(0)));
} else {
// Getting the type of the object and wrapping it within a new
// NamingEntry
Object toBind = NamingManager.getStateToBind(obj, name, this, env);
if (toBind instanceof Context) {
entry = new NamingEntry(name.get(0), toBind, NamingEntry.CONTEXT);
} else if (toBind instanceof LinkRef) {
entry = new NamingEntry(name.get(0), toBind, NamingEntry.LINK_REF);
} else if (toBind instanceof Reference) {
entry = new NamingEntry(name.get(0), toBind, NamingEntry.REFERENCE);
} else if (toBind instanceof Referenceable) {
toBind = ((Referenceable) toBind).getReference();
entry = new NamingEntry(name.get(0), toBind, NamingEntry.REFERENCE);
} else {
entry = new NamingEntry(name.get(0), toBind, NamingEntry.ENTRY);
}
bindings.put(name.get(0), entry);
}
}
}
/** Throws a naming exception is Context is not writable. */
protected boolean checkWritable() throws NamingException {
if (isWritable()) {
return true;
} else {
if (exceptionOnFailedWrite) {
throw new javax.naming.OperationNotSupportedException(
sm.getString("namingContext.readOnly"));
}
}
return false;
}
/**
* Enumerates the names bound in the named context, along with the objects bound to them. The
* contents of any subcontexts are not included.
*
* <p>If a binding is added to or removed from this context, its effect on an enumeration
* previously returned is undefined.
*
* @param name the name of the context to list
* @return an enumeration of the bindings in this context. Each element of the enumeration is of
* type Binding.
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<Binding> listBindings(Name name) throws NamingException {
// Removing empty parts
while ((!name.isEmpty()) && (name.get(0).length() == 0)) name = name.getSuffix(1);
if (name.isEmpty()) {
return new NamingContextBindingsEnumeration(bindings.values().iterator(), this);
}
NamingEntry entry = bindings.get(name.get(0));
if (entry == null) {
throw new NameNotFoundException(
sm.getString("namingContext.nameNotBound", name, name.get(0)));
}
if (entry.type != NamingEntry.CONTEXT) {
throw new NamingException(sm.getString("namingContext.contextExpected"));
}
return ((Context) entry.value).listBindings(name.getSuffix(1));
}
/**
* Retrieves the parser associated with the named context. In a federation of namespaces,
* different naming systems will parse names differently. This method allows an application to get
* a parser for parsing names into their atomic components using the naming convention of a
* particular naming system. Within any single naming system, NameParser objects returned by this
* method must be equal (using the equals() test).
*
* @param name the name of the context from which to get the parser
* @return a name parser that can parse compound names into their atomic components
* @exception NamingException if a naming exception is encountered
*/
@Override
public NameParser getNameParser(Name name) throws NamingException {
while ((!name.isEmpty()) && (name.get(0).length() == 0)) name = name.getSuffix(1);
if (name.isEmpty()) return nameParser;
if (name.size() > 1) {
Object obj = bindings.get(name.get(0));
if (obj instanceof Context) {
return ((Context) obj).getNameParser(name.getSuffix(1));
} else {
throw new NotContextException(sm.getString("namingContext.contextExpected"));
}
}
return nameParser;
}
/**
* Retrieves the full name of this context within its own namespace.
*
* <p>Many naming services have a notion of a "full name" for objects in their respective
* namespaces. For example, an LDAP entry has a distinguished name, and a DNS record has a fully
* qualified name. This method allows the client application to retrieve this name. The string
* returned by this method is not a JNDI composite name and should not be passed directly to
* context methods. In naming systems for which the notion of full name does not make sense,
* OperationNotSupportedException is thrown.
*
* @return this context's name in its own namespace; never null
* @exception OperationNotSupportedException if the naming system does not have the notion of a
* full name
* @exception NamingException if a naming exception is encountered
*/
@Override
public String getNameInNamespace() throws NamingException {
throw new OperationNotSupportedException(sm.getString("namingContext.noAbsoluteName"));
// FIXME ?
}
