| /* NamingManager.java -- |
| Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.naming.spi; |
| |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.StringTokenizer; |
| |
| import javax.naming.CannotProceedException; |
| import javax.naming.Context; |
| import javax.naming.Name; |
| import javax.naming.NamingException; |
| import javax.naming.NoInitialContextException; |
| import javax.naming.RefAddr; |
| import javax.naming.Reference; |
| import javax.naming.Referenceable; |
| import javax.naming.StringRefAddr; |
| |
| public class NamingManager |
| { |
| public static final String CPE = "java.naming.spi.CannotProceedException"; |
| |
| private static InitialContextFactoryBuilder icfb; |
| |
| // Package private so DirectoryManager can access it. |
| static ObjectFactoryBuilder ofb; |
| |
| // This class cannot be instantiated. |
| NamingManager () |
| { |
| } |
| |
| public static boolean hasInitialContextFactoryBuilder () |
| { |
| return icfb != null; |
| } |
| |
| public static Context getInitialContext (Hashtable environment) |
| throws NamingException |
| { |
| InitialContextFactory icf = null; |
| |
| if (icfb != null) |
| icf = icfb.createInitialContextFactory(environment); |
| else |
| { |
| String java_naming_factory_initial = null; |
| if (environment != null) |
| java_naming_factory_initial |
| = (String) environment.get (Context.INITIAL_CONTEXT_FACTORY); |
| if (java_naming_factory_initial == null) |
| java_naming_factory_initial = |
| System.getProperty (Context.INITIAL_CONTEXT_FACTORY); |
| if (java_naming_factory_initial == null) |
| throw new |
| NoInitialContextException ("Can't find property: " |
| + Context.INITIAL_CONTEXT_FACTORY); |
| |
| try |
| { |
| icf = (InitialContextFactory)Class.forName |
| (java_naming_factory_initial, true, |
| Thread.currentThread().getContextClassLoader()) |
| .newInstance (); |
| } |
| catch (Exception exception) |
| { |
| NoInitialContextException e |
| = new NoInitialContextException |
| ("Can't load InitialContextFactory class: " |
| + java_naming_factory_initial); |
| e.setRootCause(exception); |
| throw e; |
| } |
| } |
| |
| return icf.getInitialContext (environment); |
| } |
| |
| static Context getURLContext (Object refInfo, |
| Name name, |
| Context nameCtx, |
| String scheme, |
| Hashtable environment) |
| throws NamingException |
| { |
| String prefixes = null; |
| if (environment != null) |
| prefixes = (String) environment.get (Context.URL_PKG_PREFIXES); |
| if (prefixes == null) |
| prefixes = System.getProperty (Context.URL_PKG_PREFIXES); |
| if (prefixes == null) |
| { |
| // Specified as the default in the docs. Unclear if this is |
| // right for us. |
| prefixes = "com.sun.jndi.url"; |
| } |
| |
| scheme = scheme + "." + scheme + "URLContextFactory"; |
| |
| StringTokenizer tokens = new StringTokenizer (prefixes, ":"); |
| while (tokens.hasMoreTokens ()) |
| { |
| String aTry = tokens.nextToken (); |
| try |
| { |
| Class factoryClass = Class.forName (aTry + "." + scheme, |
| true, |
| Thread.currentThread().getContextClassLoader()); |
| ObjectFactory factory = |
| (ObjectFactory) factoryClass.newInstance (); |
| Object obj = factory.getObjectInstance (refInfo, name, |
| nameCtx, environment); |
| Context ctx = (Context) obj; |
| if (ctx != null) |
| return ctx; |
| } |
| catch (ClassNotFoundException _1) |
| { |
| // Ignore it. |
| } |
| catch (ClassCastException _2) |
| { |
| // This means that the class we found was not an |
| // ObjectFactory or that the factory returned something |
| // which was not a Context. |
| } |
| catch (InstantiationException _3) |
| { |
| // If we couldn't instantiate the factory we might get |
| // this. |
| } |
| catch (IllegalAccessException _4) |
| { |
| // Another possibility when instantiating. |
| } |
| catch (NamingException _5) |
| { |
| throw _5; |
| } |
| catch (Exception _6) |
| { |
| // Anything from getObjectInstance. |
| } |
| } |
| |
| return null; |
| } |
| |
| public static Context getURLContext (String scheme, |
| Hashtable environment) |
| throws NamingException |
| { |
| return getURLContext (null, null, null, scheme, environment); |
| } |
| |
| public static void setObjectFactoryBuilder (ObjectFactoryBuilder builder) |
| throws NamingException |
| { |
| SecurityManager sm = System.getSecurityManager (); |
| if (sm != null) |
| sm.checkSetFactory (); |
| // Once the builder is installed it cannot be replaced. |
| if (ofb != null) |
| throw new IllegalStateException ("builder already installed"); |
| if (builder != null) |
| ofb = builder; |
| } |
| |
| static StringTokenizer getPlusPath (String property, Hashtable env, |
| Context nameCtx) |
| throws NamingException |
| { |
| String path = (String) env.get (property); |
| if (nameCtx == null) |
| nameCtx = getInitialContext (env); |
| String path2 = (String) nameCtx.getEnvironment ().get (property); |
| if (path == null) |
| path = path2; |
| else if (path2 != null) |
| path += ":" + path2; |
| return new StringTokenizer (path != null ? path : "", ":"); |
| } |
| |
| public static Object getObjectInstance (Object refInfo, |
| Name name, |
| Context nameCtx, |
| Hashtable environment) |
| throws Exception |
| { |
| ObjectFactory factory = null; |
| |
| if (ofb != null) |
| factory = ofb.createObjectFactory (refInfo, environment); |
| else |
| { |
| // First see if we have a Reference or a Referenceable. If so |
| // we do some special processing. |
| Object ref2 = refInfo; |
| if (refInfo instanceof Referenceable) |
| ref2 = ((Referenceable) refInfo).getReference (); |
| if (ref2 instanceof Reference) |
| { |
| Reference ref = (Reference) ref2; |
| |
| // If we have a factory class name then we use that. |
| String fClass = ref.getFactoryClassName (); |
| if (fClass != null) |
| { |
| // Exceptions here are passed to the caller. |
| Class k = Class.forName (fClass, |
| true, |
| Thread.currentThread().getContextClassLoader()); |
| factory = (ObjectFactory) k.newInstance (); |
| } |
| else |
| { |
| // There's no factory class name. If the address is a |
| // StringRefAddr with address type `URL', then we try |
| // the URL's context factory. |
| Enumeration e = ref.getAll (); |
| while (e.hasMoreElements ()) |
| { |
| RefAddr ra = (RefAddr) e.nextElement (); |
| if (ra instanceof StringRefAddr |
| && "URL".equals (ra.getType ())) |
| { |
| factory |
| = (ObjectFactory) getURLContext (refInfo, |
| name, |
| nameCtx, |
| (String) ra.getContent (), |
| environment); |
| Object obj = factory.getObjectInstance (refInfo, |
| name, |
| nameCtx, |
| environment); |
| if (obj != null) |
| return obj; |
| } |
| } |
| |
| // Have to try the next step. |
| factory = null; |
| } |
| } |
| |
| // Now look at OBJECT_FACTORIES to find the factory. |
| if (factory == null) |
| { |
| StringTokenizer tokens = getPlusPath (Context.OBJECT_FACTORIES, |
| environment, nameCtx); |
| |
| while (tokens.hasMoreTokens ()) |
| { |
| String klassName = tokens.nextToken (); |
| Class k = Class.forName (klassName, |
| true, |
| Thread.currentThread().getContextClassLoader()); |
| factory = (ObjectFactory) k.newInstance (); |
| Object obj = factory.getObjectInstance (refInfo, name, |
| nameCtx, environment); |
| if (obj != null) |
| return obj; |
| } |
| |
| // Failure. |
| return refInfo; |
| } |
| } |
| |
| if (factory == null) |
| return refInfo; |
| Object obj = factory.getObjectInstance (refInfo, name, |
| nameCtx, environment); |
| return obj == null ? refInfo : obj; |
| } |
| |
| public static void setInitialContextFactoryBuilder (InitialContextFactoryBuilder builder) |
| throws NamingException |
| { |
| SecurityManager sm = System.getSecurityManager (); |
| if (sm != null) |
| sm.checkSetFactory (); |
| // Once the builder is installed it cannot be replaced. |
| if (icfb != null) |
| throw new IllegalStateException ("builder already installed"); |
| if (builder != null) |
| icfb = builder; |
| } |
| |
| public static Context getContinuationContext (CannotProceedException cpe) |
| throws NamingException |
| { |
| Hashtable env = cpe.getEnvironment (); |
| if (env != null) |
| env.put (CPE, cpe); |
| |
| // It is really unclear to me if this is right. |
| try |
| { |
| Object obj = getObjectInstance (cpe.getResolvedObj(), |
| cpe.getAltName (), |
| cpe.getAltNameCtx (), |
| env); |
| if (obj != null) |
| return (Context) obj; |
| } |
| catch (Exception _) |
| { |
| } |
| |
| // fix stack trace for re-thrown exception (message confusing otherwise) |
| cpe.fillInStackTrace(); |
| |
| throw cpe; |
| } |
| |
| public static Object getStateToBind (Object obj, Name name, |
| Context nameCtx, Hashtable environment) |
| throws NamingException |
| { |
| StringTokenizer tokens = getPlusPath (Context.STATE_FACTORIES, |
| environment, nameCtx); |
| while (tokens.hasMoreTokens ()) |
| { |
| String klassName = tokens.nextToken (); |
| try |
| { |
| Class k = Class.forName (klassName, |
| true, |
| Thread.currentThread().getContextClassLoader()); |
| StateFactory factory = (StateFactory) k.newInstance (); |
| Object o = factory.getStateToBind (obj, name, nameCtx, |
| environment); |
| if (o != null) |
| return o; |
| } |
| catch (ClassNotFoundException _1) |
| { |
| // Ignore it. |
| } |
| catch (ClassCastException _2) |
| { |
| // This means that the class we found was not an |
| // ObjectFactory or that the factory returned something |
| // which was not a Context. |
| } |
| catch (InstantiationException _3) |
| { |
| // If we couldn't instantiate the factory we might get |
| // this. |
| } |
| catch (IllegalAccessException _4) |
| { |
| // Another possibility when instantiating. |
| } |
| } |
| |
| return obj; |
| } |
| } |