J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.jndi.url.rmi; |
| 27 | |
| 28 | |
| 29 | import java.util.Hashtable; |
| 30 | |
| 31 | import javax.naming.*; |
| 32 | import javax.naming.spi.ObjectFactory; |
| 33 | |
| 34 | |
| 35 | /** |
| 36 | * An RMI URL context factory creates contexts that can resolve names |
| 37 | * that are RMI URLs as defined by rmiURLContext. |
| 38 | * In addition, if given a specific RMI URL (or an array of them), the |
| 39 | * factory will resolve all the way to the named registry or object. |
| 40 | * |
| 41 | * @author Scott Seligman |
| 42 | * |
| 43 | * @see rmiURLContext |
| 44 | */ |
| 45 | |
| 46 | |
| 47 | public class rmiURLContextFactory implements ObjectFactory { |
| 48 | |
| 49 | public Object getObjectInstance(Object urlInfo, Name name, |
| 50 | Context nameCtx, Hashtable<?,?> env) |
| 51 | throws NamingException |
| 52 | { |
| 53 | if (urlInfo == null) { |
| 54 | return (new rmiURLContext(env)); |
| 55 | } else if (urlInfo instanceof String) { |
| 56 | return getUsingURL((String)urlInfo, env); |
| 57 | } else if (urlInfo instanceof String[]) { |
| 58 | return getUsingURLs((String[])urlInfo, env); |
| 59 | } else { |
| 60 | throw (new ConfigurationException( |
| 61 | "rmiURLContextFactory.getObjectInstance: " + |
| 62 | "argument must be an RMI URL String or an array of them")); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | private static Object getUsingURL(String url, Hashtable env) |
| 67 | throws NamingException |
| 68 | { |
| 69 | rmiURLContext urlCtx = new rmiURLContext(env); |
| 70 | try { |
| 71 | return urlCtx.lookup(url); |
| 72 | } finally { |
| 73 | urlCtx.close(); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * Try each URL until lookup() succeeds for one of them. |
| 79 | * If all URLs fail, throw one of the exceptions arbitrarily. |
| 80 | * Not pretty, but potentially more informative than returning null. |
| 81 | */ |
| 82 | private static Object getUsingURLs(String[] urls, Hashtable env) |
| 83 | throws NamingException |
| 84 | { |
| 85 | if (urls.length == 0) { |
| 86 | throw (new ConfigurationException( |
| 87 | "rmiURLContextFactory: empty URL array")); |
| 88 | } |
| 89 | rmiURLContext urlCtx = new rmiURLContext(env); |
| 90 | try { |
| 91 | NamingException ne = null; |
| 92 | for (int i = 0; i < urls.length; i++) { |
| 93 | try { |
| 94 | return urlCtx.lookup(urls[i]); |
| 95 | } catch (NamingException e) { |
| 96 | ne = e; |
| 97 | } |
| 98 | } |
| 99 | throw ne; |
| 100 | } finally { |
| 101 | urlCtx.close(); |
| 102 | } |
| 103 | } |
| 104 | } |