108 lines
3.2 KiB
Java
108 lines
3.2 KiB
Java
/* ControlFactory.java --
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Copyright (C) 2001, 2004 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 javax.naming.ldap;
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import java.util.Hashtable;
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import java.util.StringTokenizer;
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import javax.naming.Context;
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import javax.naming.NamingException;
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/**
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* @author Tom Tromey (tromey@redhat.com)
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* @date June 22, 2001
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*/
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public abstract class ControlFactory
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{
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protected ControlFactory ()
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{
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}
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public abstract Control getControlInstance (Control control)
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throws NamingException;
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public static Control getControlInstance (Control control,
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Context ctx,
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Hashtable env)
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throws NamingException
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{
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String path = (String) env.get (LdapContext.CONTROL_FACTORIES);
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String path2 = null;
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if (ctx != null)
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path2 = (String) ctx.getEnvironment ().get (LdapContext.CONTROL_FACTORIES);
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if (path == null)
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path = path2;
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else if (path2 != null)
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path += ":" + path2;
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StringTokenizer tokens = new StringTokenizer (path, ":");
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while (tokens.hasMoreTokens ())
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{
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String name = tokens.nextToken ();
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try
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{
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Class k = Class.forName (name);
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ControlFactory cf = (ControlFactory) k.newInstance ();
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Control ctrl = cf.getControlInstance (control);
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if (ctrl != null)
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return ctrl;
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}
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catch (ClassNotFoundException _1)
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{
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// Ignore it.
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}
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catch (ClassCastException _2)
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{
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// Ignore it.
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}
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catch (InstantiationException _3)
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{
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// If we couldn't instantiate the factory we might get
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// this.
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}
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catch (IllegalAccessException _4)
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{
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// Another possibility when instantiating.
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}
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}
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return control;
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}
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}
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