001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.geronimo.naming.java;
019
020 import java.util.Collections;
021
022 import javax.naming.Context;
023 import javax.naming.NameNotFoundException;
024 import javax.naming.NamingException;
025
026 import org.apache.xbean.naming.context.ImmutableContext;
027
028 /**
029 * The root context for the java: namespace.
030 * Automatically handles switching the "java:comp" sub-context to the
031 * appropriate one for the current thread.
032 *
033 * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
034 */
035 public class RootContext extends ImmutableContext {
036 private static InheritableThreadLocal compContext = new InheritableThreadLocal();
037
038 public RootContext() throws NamingException {
039 super(Collections.EMPTY_MAP);
040 }
041
042 public Object lookup(String name) throws NamingException {
043 if (name.startsWith("java:")) {
044 name = name.substring(5);
045 if (name.length() == 0) {
046 return this;
047 }
048
049 Context compCtx = (Context) compContext.get();
050 if (compCtx == null) {
051 // the component context was not set for this thread
052 throw new NameNotFoundException(name);
053 }
054
055 if ("comp".equals(name)) {
056 return compCtx;
057 } else if (name.startsWith("comp/")) {
058 return compCtx.lookup(name.substring(5));
059 } else if ("/comp".equals(name)) {
060 return compCtx;
061 } else if (name.startsWith("/comp/")) {
062 return compCtx.lookup(name.substring(6));
063 } else {
064 throw new NameNotFoundException("Unrecognized name, does not start with expected 'comp': " + name);
065 }
066 }
067 return super.lookup(name);
068 }
069
070 /**
071 * Set the component context for the current thread. This will be returned
072 * for all lookups of "java:comp"
073 * @param ctx the current components context
074 */
075 public static void setComponentContext(Context ctx) {
076 compContext.set(ctx);
077 }
078
079 /**
080 * Get the component context for the current thread.
081 * @return the current components context
082 */
083 public static Context getComponentContext() {
084 return (Context) compContext.get();
085 }
086 }