108 lines
3.5 KiB
Java
108 lines
3.5 KiB
Java
/* DelegateFactory.java --
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Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.rmi.CORBA;
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import gnu.CORBA.ObjectCreator;
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/**
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* This class produces delegates, using the system properties. If not
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* corresponding property is specified, returns default implementations.
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*
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* @author Wu Gansha (gansha.wu@intel.com)
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* @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
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*/
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public class DelegateFactory
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{
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/**
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* The name to get a stub delegate.
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*/
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public static final String STUB = "Stub";
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/**
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* The name to get the util delegate.
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*/
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public static final String UTIL = "Util";
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/**
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* The name to get the ValueHandler delegate.
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*/
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public static final String VALUEHANDLER = "ValueHandler";
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/**
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* The name to get the PortableRemoteObject delegate.
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*/
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public static final String PORTABLE_REMOTE_OBJECT = "PortableRemoteObject";
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/**
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* Get an instance of the given delegate. As in all cases the singleton
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* instance is used, the caching here would be redundant.
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*
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* @param type a delegate type.
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*
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* @return the associated delegate.
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*
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* @throws InternalError if the delegate class, indicated in the system
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* properties, cannot be instantiated.
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*/
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public static Object getInstance(String type)
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throws InternalError
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{
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String propertyName = "javax.rmi.CORBA." + type + "Class";
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String dcname = System.getProperty(propertyName);
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if (dcname == null)
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{
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// // No javax.rmi.CORBA.XXXClass property sepcified.
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dcname = "gnu.javax.rmi.CORBA." + type + "DelegateImpl";
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}
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try
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{
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Class dclass = ObjectCreator.forName(dcname);
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return dclass.newInstance();
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}
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catch (Exception e)
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{
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InternalError ierr = new InternalError("Exception when trying to get "
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+ type + "delegate instance:" + dcname);
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ierr.initCause(e);
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throw ierr;
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}
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}
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}
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