001 /**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one or more
004 * contributor license agreements. See the NOTICE file distributed with
005 * this work for additional information regarding copyright ownership.
006 * The ASF licenses this file to You under the Apache License, Version 2.0
007 * (the "License"); you may not use this file except in compliance with
008 * the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package org.apache.geronimo.naming.java;
020
021 import java.util.Collections;
022
023 import javax.naming.Context;
024 import javax.naming.NameNotFoundException;
025 import javax.naming.NamingException;
026
027 import org.apache.xbean.naming.context.ImmutableContext;
028
029 /**
030 * The root context for the java: namespace.
031 * Automatically handles switching the "java:comp" sub-context to the
032 * appropriate one for the current thread.
033 *
034 * @version $Rev: 470597 $ $Date: 2006-11-02 15:30:55 -0800 (Thu, 02 Nov 2006) $
035 */
036 public class RootContext extends ImmutableContext {
037 private static InheritableThreadLocal compContext = new InheritableThreadLocal();
038
039 public RootContext() throws NamingException {
040 super(Collections.EMPTY_MAP);
041 }
042
043 public Object lookup(String name) throws NamingException {
044 if (name.startsWith("java:")) {
045 name = name.substring(5);
046 if (name.length() == 0) {
047 return this;
048 }
049
050 Context compCtx = (Context) compContext.get();
051 if (compCtx == null) {
052 // the component context was not set for this thread
053 throw new NameNotFoundException(name);
054 }
055
056 if ("comp".equals(name)) {
057 return compCtx;
058 } else if (name.startsWith("comp/")) {
059 return compCtx.lookup(name.substring(5));
060 } else if ("/comp".equals(name)) {
061 return compCtx;
062 } else if (name.startsWith("/comp/")) {
063 return compCtx.lookup(name.substring(6));
064 } else {
065 throw new NameNotFoundException("Unrecognized name, does not start with expected 'comp': " + name);
066 }
067 }
068 return super.lookup(name);
069 }
070
071 /**
072 * Set the component context for the current thread. This will be returned
073 * for all lookups of "java:comp"
074 * @param ctx the current components context
075 */
076 public static void setComponentContext(Context ctx) {
077 compContext.set(ctx);
078 }
079
080 /**
081 * Get the component context for the current thread.
082 * @return the current components context
083 */
084 public static Context getComponentContext() {
085 return (Context) compContext.get();
086 }
087 }