Jetty example source code file (NamingUtil.java)

This example Jetty source code file (NamingUtil.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

binding, context, context, hashmap, map, name, name, namenotfoundexception, naming, namingexception, namingexception, object, string, string, subcontext, util

The Jetty NamingUtil.java source code

// ========================================================================
// $Id: NamingUtil.java 231 2006-02-19 15:09:58Z janb $
// Copyright 1999-2006 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

package org.mortbay.naming;

import java.util.HashMap;
import java.util.Map;

import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameNotFoundException;
import javax.naming.NameParser;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;

import org.mortbay.log.Log;


/**
 * Util.java
 *
 *
 * Created: Tue Jul  1 18:26:17 2003
 *
 * @author <a href="mailto:janb@mortbay.com">Jan Bartel
 * @version 1.0
 */
public class NamingUtil 
{

    /* ------------------------------------------------------------ */
    /**
     * Bind an object to a context ensuring all subcontexts 
     * are created if necessary
     *
     * @param ctx the context into which to bind
     * @param name the name relative to context to bind
     * @param obj the object to be bound
     * @exception NamingException if an error occurs
     */
    public static void bind (Context ctx, String nameStr, Object obj)
        throws NamingException
    {
        Name name = ctx.getNameParser("").parse(nameStr);

        //no name, nothing to do 
        if (name.size() == 0)
            return;

        Context subCtx = ctx;
        
        //last component of the name will be the name to bind
        for (int i=0; i < name.size() - 1; i++)
        {
            try
            {
                subCtx = (Context)subCtx.lookup (name.get(i));
                if(Log.isDebugEnabled())Log.debug("Subcontext "+name.get(i)+" already exists");
            }
            catch (NameNotFoundException e)
            {
                subCtx = subCtx.createSubcontext(name.get(i));
                if(Log.isDebugEnabled())Log.debug("Subcontext "+name.get(i)+" created");
            }
        }

        subCtx.rebind (name.get(name.size() - 1), obj);
        if(Log.isDebugEnabled())Log.debug("Bound object to "+name.get(name.size() - 1));
    } 
    
    
    /**
     * Do a deep listing of the bindings for a context.
     * @param ctx the context containing the name for which to list the bindings
     * @param name the name in the context to list
     * @return map: key is fully qualified name, value is the bound object 
     * @throws NamingException
     */
    public static Map flattenBindings (Context ctx, String name)
    throws NamingException
    {
        HashMap map = new HashMap();

        //the context representation of name arg
        Context c = (Context)ctx.lookup (name);
        NameParser parser = c.getNameParser("");
        NamingEnumeration enm = ctx.listBindings(name);
        while (enm.hasMore())
        {
            Binding b = (Binding)enm.next();

            if (b.getObject() instanceof Context)
            {
                map.putAll(flattenBindings (c, b.getName()));
            }
            else
            {
                Name compoundName = parser.parse (c.getNameInNamespace());
                compoundName.add(b.getName());
                map.put (compoundName.toString(), b.getObject());
            }
            
        }
        
        return map;
    }
    
}