001 /* CommandInfo.java -- Description of the result of a command request.
002 Copyright (C) 2004 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.activation;
039
040 import java.beans.Beans;
041 import java.io.Externalizable;
042 import java.io.InputStream;
043 import java.io.IOException;
044 import java.io.ObjectInputStream;
045
046 /**
047 * Description of the result of a command request.
048 *
049 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
050 * @version 1.1
051 */
052 public class CommandInfo
053 {
054
055 private final String verb;
056 private final String className;
057
058 /**
059 * Constructor.
060 * @param verb the command verb
061 * @param className the command class name
062 */
063 public CommandInfo(String verb, String className)
064 {
065 this.verb = verb;
066 this.className = className;
067 }
068
069 /**
070 * Returns the command verb.
071 */
072 public String getCommandName()
073 {
074 return verb;
075 }
076
077 /**
078 * Returns the command class name.
079 */
080 public String getCommandClass()
081 {
082 return className;
083 }
084
085 /**
086 * Returns the instantiated bean.
087 * If the bean implements <code>CommandObject</code>, its
088 * <code>setCommandContext</code> method will be called.
089 * @param dh the data handler describing the command data
090 * @param loader the class loader used to instantiate the bean
091 */
092 public Object getCommandObject(DataHandler dh, ClassLoader loader)
093 throws IOException, ClassNotFoundException
094 {
095 Object object = Beans.instantiate(loader, className);
096 if (object != null)
097 {
098 if (object instanceof CommandObject)
099 {
100 CommandObject command = (CommandObject)object;
101 command.setCommandContext(verb, dh);
102 }
103 else if (dh != null && (object instanceof Externalizable))
104 {
105 InputStream in = dh.getInputStream();
106 if (in != null)
107 {
108 Externalizable externalizable = (Externalizable)object;
109 externalizable.readExternal(new ObjectInputStream(in));
110 }
111 }
112 }
113 return object;
114 }
115
116 }