001/* CommandInfo.java -- Description of the result of a command request. 002 Copyright (C) 2004 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package javax.activation; 039 040import java.beans.Beans; 041import java.io.Externalizable; 042import java.io.InputStream; 043import java.io.IOException; 044import 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 */ 052public 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}