| /* StubLocator.java -- |
| Copyright (C) 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 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 gnu.CORBA; |
| |
| import org.omg.CORBA.ORB; |
| import org.omg.CORBA.portable.ObjectImpl; |
| |
| /** |
| * Finds a stub class like "_HelloStub" that can be instantiated |
| * from IOR reference. The returned object can be casted to the |
| * used type like "Hello" without using the helper .narrow method, |
| * and the object is not unnsecessarily re - instantiated if |
| * the .narrow method is used anyway. If no stub, matching the naming |
| * conventions, is available, the returned stub replacement can still be used |
| * to get the valid request, add parameter and invoke the method by name. |
| * |
| * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) |
| */ |
| public class StubLocator |
| { |
| /** |
| * Search for the possibly available default stub. |
| * |
| * @param orb the current ORB. It is not required to find the binding |
| * classes, but is needed to instantiate the default implementation |
| * if no binding classes are found. |
| * |
| * @param ior the IOR, possibly containing the information about the |
| * correct implementation class. |
| */ |
| public static ObjectImpl search(ORB orb, IOR ior) |
| { |
| try |
| { |
| int a = ior.Id.indexOf(':'); |
| int b = ior.Id.lastIndexOf(':'); |
| |
| String s = ior.Id.substring(a + 1, b).replace('/', '.'); |
| |
| String path; |
| |
| b = s.lastIndexOf('.'); |
| if (b > 0) |
| path = s.substring(0, b + 1); |
| else |
| path = ""; |
| |
| String stub = "_" + s.substring(b + 1) + "Stub"; |
| |
| Class stubClass = ObjectCreator.forName(path + stub); |
| |
| return (ObjectImpl) stubClass.newInstance(); |
| } |
| catch (Exception failed) |
| { |
| // Various exceptions can be thrown if the Id cannot be parsed, |
| // the class is missing, cannot be instantiated or is not an |
| // instance of the ObjectImpl. |
| return createDefaultStub(orb, ior); |
| } |
| } |
| |
| /** |
| * Return the default stub for the case when the client binding classes |
| * are not locally available. The returned stub can still be used |
| * to get the valid request, add parameter and invoke the method by name. |
| * |
| * @return the default implementation. |
| */ |
| protected static ObjectImpl createDefaultStub(ORB orb, IOR ior) |
| { |
| return new IorObject(orb, ior); |
| } |
| } |