| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * 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.apache.naming.resources; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.net.URLStreamHandler; |
| import java.util.Hashtable; |
| |
| import javax.naming.directory.DirContext; |
| |
| /** |
| * Stream handler to a JNDI directory context. |
| * |
| * @author <a href="mailto:remm@apache.org">Remy Maucherat</a> |
| * @version $Revision$ |
| */ |
| public class DirContextURLStreamHandler |
| extends URLStreamHandler { |
| |
| |
| // ----------------------------------------------------------- Constructors |
| |
| |
| public DirContextURLStreamHandler() { |
| } |
| |
| |
| public DirContextURLStreamHandler(DirContext context) { |
| this.context = context; |
| } |
| |
| |
| // -------------------------------------------------------------- Variables |
| |
| |
| /** |
| * Bindings class loader - directory context. Keyed by CL id. |
| */ |
| private static Hashtable clBindings = new Hashtable(); |
| |
| |
| /** |
| * Bindings thread - directory context. Keyed by thread id. |
| */ |
| private static Hashtable threadBindings = new Hashtable(); |
| |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| |
| /** |
| * Directory context. |
| */ |
| protected DirContext context = null; |
| |
| |
| // ------------------------------------------------------------- Properties |
| |
| |
| // ----------------------------------------------- URLStreamHandler Methods |
| |
| |
| /** |
| * Opens a connection to the object referenced by the <code>URL</code> |
| * argument. |
| */ |
| protected URLConnection openConnection(URL u) |
| throws IOException { |
| DirContext currentContext = this.context; |
| if (currentContext == null) |
| currentContext = get(); |
| return new DirContextURLConnection(currentContext, u); |
| } |
| |
| |
| // --------------------------------------------------------- Public Methods |
| |
| |
| /** |
| * Set the java.protocol.handler.pkgs system property. |
| */ |
| public static void setProtocolHandler() { |
| String value = System.getProperty(Constants.PROTOCOL_HANDLER_VARIABLE); |
| if (value == null) { |
| value = Constants.Package; |
| System.setProperty(Constants.PROTOCOL_HANDLER_VARIABLE, value); |
| } else if (value.indexOf(Constants.Package) == -1) { |
| value += "|" + Constants.Package; |
| System.setProperty(Constants.PROTOCOL_HANDLER_VARIABLE, value); |
| } |
| } |
| |
| |
| /** |
| * Returns true if the thread or the context class loader of the current |
| * thread is bound. |
| */ |
| public static boolean isBound() { |
| return (clBindings.containsKey |
| (Thread.currentThread().getContextClassLoader())) |
| || (threadBindings.containsKey(Thread.currentThread())); |
| } |
| |
| |
| /** |
| * Binds a directory context to a class loader. |
| */ |
| public static void bind(DirContext dirContext) { |
| ClassLoader currentCL = |
| Thread.currentThread().getContextClassLoader(); |
| if (currentCL != null) |
| clBindings.put(currentCL, dirContext); |
| } |
| |
| |
| /** |
| * Unbinds a directory context to a class loader. |
| */ |
| public static void unbind() { |
| ClassLoader currentCL = |
| Thread.currentThread().getContextClassLoader(); |
| if (currentCL != null) |
| clBindings.remove(currentCL); |
| } |
| |
| |
| /** |
| * Binds a directory context to a thread. |
| */ |
| public static void bindThread(DirContext dirContext) { |
| threadBindings.put(Thread.currentThread(), dirContext); |
| } |
| |
| |
| /** |
| * Unbinds a directory context to a thread. |
| */ |
| public static void unbindThread() { |
| threadBindings.remove(Thread.currentThread()); |
| } |
| |
| |
| /** |
| * Get the bound context. |
| */ |
| public static DirContext get() { |
| |
| DirContext result = null; |
| |
| Thread currentThread = Thread.currentThread(); |
| ClassLoader currentCL = currentThread.getContextClassLoader(); |
| |
| // Checking CL binding |
| result = (DirContext) clBindings.get(currentCL); |
| if (result != null) |
| return result; |
| |
| // Checking thread biding |
| result = (DirContext) threadBindings.get(currentThread); |
| |
| // Checking parent CL binding |
| currentCL = currentCL.getParent(); |
| while (currentCL != null) { |
| result = (DirContext) clBindings.get(currentCL); |
| if (result != null) |
| return result; |
| currentCL = currentCL.getParent(); |
| } |
| |
| if (result == null) |
| throw new IllegalStateException("Illegal class loader binding"); |
| |
| return result; |
| |
| } |
| |
| |
| /** |
| * Binds a directory context to a class loader. |
| */ |
| public static void bind(ClassLoader cl, DirContext dirContext) { |
| clBindings.put(cl, dirContext); |
| } |
| |
| |
| /** |
| * Unbinds a directory context to a class loader. |
| */ |
| public static void unbind(ClassLoader cl) { |
| clBindings.remove(cl); |
| } |
| |
| |
| /** |
| * Get the bound context. |
| */ |
| public static DirContext get(ClassLoader cl) { |
| return (DirContext) clBindings.get(cl); |
| } |
| |
| |
| /** |
| * Get the bound context. |
| */ |
| public static DirContext get(Thread thread) { |
| return (DirContext) threadBindings.get(thread); |
| } |
| |
| |
| } |