namingcontext.java

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                }
                catch (NamingException e)
                {
                    throw e;
                }
                catch (Exception e)
                {
                    Log.warn("",e);
                    throw new NamingException (e.getMessage());
                }
            }
        }
        
        if (ctx instanceof Context)
        {
            return ((Context)ctx).createSubcontext (cname.getSuffix(1));
        }
        else
            throw new NotContextException (firstComponent +" is not a Context");
    }


    /*------------------------------------------------*/
    /**
     * Create a Context as a child of this one
     *
     * @param name a <code>String</code> value
     * @return a <code>Context</code> value
     * @exception NamingException if an error occurs
     */
    public Context createSubcontext (String name)
        throws NamingException
    {
        return createSubcontext(_parser.parse(name));
    }



    /*------------------------------------------------*/
    /**
     * Not supported
     *
     * @param name name of subcontext to remove
     * @exception NamingException if an error occurs
     */
    public void destroySubcontext (String name)
        throws NamingException
    {
        removeBinding(_parser.parse(name));
    }



    /*------------------------------------------------*/
    /**
     * Not supported
     *
     * @param name name of subcontext to remove
     * @exception NamingException if an error occurs
     */
    public void destroySubcontext (Name name)
        throws NamingException
    {
         removeBinding(name);
    }

    /*------------------------------------------------*/
    /**
     * Lookup a binding by name
     *
     * @param name name of bound object
     * @exception NamingException if an error occurs
     */
    public Object lookup(Name name)
        throws NamingException
    {
        if(Log.isDebugEnabled())Log.debug("Looking up name=\""+name+"\"");
        Name cname = toCanonicalName(name);

        if ((cname == null) || (cname.size() == 0))
        {
            Log.debug("Null or empty name, returning copy of this context");
            NamingContext ctx = new NamingContext (_env, _name, _parent, _parser);
            ctx._bindings = _bindings;
            return ctx;
        }

    
      
        if (cname.size() == 1)
        {
            Binding binding = getBinding (cname);
            if (binding == null)
            {
                NameNotFoundException nnfe = new NameNotFoundException();
                nnfe.setRemainingName(cname);
                throw nnfe;
            }
                

            Object o = binding.getObject();

            //handle links by looking up the link
            if (o instanceof LinkRef)
            {
                //if link name starts with ./ it is relative to current context
                String linkName = ((LinkRef)o).getLinkName();
                if (linkName.startsWith("./"))
                    return this.lookup (linkName.substring(2));
                else
                {
                    //link name is absolute
                    InitialContext ictx = new InitialContext();
                    return ictx.lookup (linkName);
                }
            }
            else if (o instanceof Reference)
            {
                //deference the object
                try
                {
                    return NamingManager.getObjectInstance(o, cname, this, _env);
                }
                catch (NamingException e)
                {
                    throw e;
                }
                catch (Exception e)
                {
                    Log.warn("",e);
                    throw new NamingException (e.getMessage());
                }
            }
            else
                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)
            {
                NameNotFoundException nnfe = new NameNotFoundException();
                nnfe.setRemainingName(cname);
                throw nnfe;
            }
            
            //as we have bound a reference to an object factory 
            //for the component specific contexts
            //at "comp" we need to resolve the reference
            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));
    }


    /*------------------------------------------------*/
    /**
     * Lookup binding of an object by name
     *
     * @param name name of bound object
     * @return object bound to name
     * @exception NamingException if an error occurs
     */
    public Object lookup (String name)
        throws NamingException
    {
        return lookup (_parser.parse(name));
    }



    /*------------------------------------------------*/
    /**
     * 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));
    }


    /*------------------------------------------------*/
    /**
     * 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 (String name)
        throws NamingException
    {
        return lookupLink (_parser.parse(name));
    }


    /*------------------------------------------------*/
    /**
     * List all names bound at Context named by Name
     *
     * @param name a <code>Name</code> value
     * @return a <code>NamingEnumeration</code> value
     * @exception NamingException if an error occurs
     */
    public NamingEnumeration list(Name name)
        throws NamingException
    {
        if(Log.isDebugEnabled())Log.debug("list() on Context="+getName()+" for name="+name);
        Name cname = toCanonicalName(name);

     

        if (cname == null)
        {
            return new NameEnumeration(EMPTY_ENUM);
        }

        
        if (cname.size() == 0)
        {
           return new NameEnumeration (_bindings.elements()); 
        }

      

        //multipart name
        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
                if(Log.isDebugEnabled())Log.debug("Dereferencing Reference for "+name.get(0));
                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).list (cname.getSuffix(1));       
    }


    /*------------------------------------------------*/
    /**
     * List all names bound at Context named by Name
     *
     * @param name a <code>Name</code> value
     * @return a <code>NamingEnumeration</code> value
     * @exception NamingException if an error occurs
     */       
    public NamingEnumeration list(String name)
        throws NamingException
    {
        return list(_parser.parse(name));
    }



    /*------------------------------------------------*/
    /**
     * List all Bindings present at Context named by Name
     *
     * @param name a <code>Name</code> value
     * @return a <code>NamingEnumeration</code> value
     * @exception NamingException if an error occurs
     */
    public NamingEnumeration listBindings(Name name)
        throws NamingException
    {  
        Name cname = toCanonicalName (name);

        if (cname == null)
        {
            return new BindingEnumeration(EMPTY_ENUM);
        }

        if (cname.size() == 0)
        {
           return new BindingEnumeration (_bindings.elements()); 
        }

      
        
        //multipart name
        String firstComponent = cname.get(0);
        Object ctx = null;

        //if a name has a leading "/" it is parsed as "" so ignore it by staying
        //at this level in the tree
        if (firstComponent.equals(""))
            ctx = this;
        else
        {
            //it is a non-empty name component
            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).listBindings (cname.getSuffix(1));
    }



    /*------------------------------------------------*/
    /**
     * List all Bindings at Name
     *
     * @param name a <code>String</code> value
     * @return a <code>NamingEnumeration</code> value
     * @exception NamingException if an error occurs
     */
    public NamingEnumeration listBindings(String name)
        throws NamingException
    {
        return listBindings (_parser.parse(name));
    }