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 }