1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/jaf_classes/javax/activation/CommandMap.java Tue Mar 06 16:09:35 2012 -0800 1.3 @@ -0,0 +1,220 @@ 1.4 +/* 1.5 + * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. Oracle designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Oracle in the LICENSE file that accompanied this code. 1.13 + * 1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.17 + * version 2 for more details (a copy is included in the LICENSE file that 1.18 + * accompanied this code). 1.19 + * 1.20 + * You should have received a copy of the GNU General Public License version 1.21 + * 2 along with this work; if not, write to the Free Software Foundation, 1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.23 + * 1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.25 + * or visit www.oracle.com if you need additional information or have any 1.26 + * questions. 1.27 + */ 1.28 + 1.29 +package javax.activation; 1.30 + 1.31 + 1.32 +/** 1.33 + * The CommandMap class provides an interface to a registry of 1.34 + * command objects available in the system. 1.35 + * Developers are expected to either use the CommandMap 1.36 + * implementation included with this package (MailcapCommandMap) or 1.37 + * develop their own. Note that some of the methods in this class are 1.38 + * abstract. 1.39 + * 1.40 + * @since 1.6 1.41 + */ 1.42 +public abstract class CommandMap { 1.43 + private static CommandMap defaultCommandMap = null; 1.44 + 1.45 + /** 1.46 + * Get the default CommandMap. 1.47 + * <p> 1.48 + * 1.49 + * <ul> 1.50 + * <li> In cases where a CommandMap instance has been previously set 1.51 + * to some value (via <i>setDefaultCommandMap</i>) 1.52 + * return the CommandMap. 1.53 + * <li> 1.54 + * In cases where no CommandMap has been set, the CommandMap 1.55 + * creates an instance of <code>MailcapCommandMap</code> and 1.56 + * set that to the default, returning its value. 1.57 + * 1.58 + * </ul> 1.59 + * 1.60 + * @return the CommandMap 1.61 + */ 1.62 + public static CommandMap getDefaultCommandMap() { 1.63 + if (defaultCommandMap == null) 1.64 + defaultCommandMap = new MailcapCommandMap(); 1.65 + 1.66 + return defaultCommandMap; 1.67 + } 1.68 + 1.69 + /** 1.70 + * Set the default CommandMap. Reset the CommandMap to the default by 1.71 + * calling this method with <code>null</code>. 1.72 + * 1.73 + * @param commandMap The new default CommandMap. 1.74 + * @exception SecurityException if the caller doesn't have permission 1.75 + * to change the default 1.76 + */ 1.77 + public static void setDefaultCommandMap(CommandMap commandMap) { 1.78 + SecurityManager security = System.getSecurityManager(); 1.79 + if (security != null) { 1.80 + try { 1.81 + // if it's ok with the SecurityManager, it's ok with me... 1.82 + security.checkSetFactory(); 1.83 + } catch (SecurityException ex) { 1.84 + // otherwise, we also allow it if this code and the 1.85 + // factory come from the same class loader (e.g., 1.86 + // the JAF classes were loaded with the applet classes). 1.87 + if (CommandMap.class.getClassLoader() != 1.88 + commandMap.getClass().getClassLoader()) 1.89 + throw ex; 1.90 + } 1.91 + } 1.92 + defaultCommandMap = commandMap; 1.93 + } 1.94 + 1.95 + /** 1.96 + * Get the preferred command list from a MIME Type. The actual semantics 1.97 + * are determined by the implementation of the CommandMap. 1.98 + * 1.99 + * @param mimeType the MIME type 1.100 + * @return the CommandInfo classes that represent the command Beans. 1.101 + */ 1.102 + abstract public CommandInfo[] getPreferredCommands(String mimeType); 1.103 + 1.104 + /** 1.105 + * Get the preferred command list from a MIME Type. The actual semantics 1.106 + * are determined by the implementation of the CommandMap. <p> 1.107 + * 1.108 + * The <code>DataSource</code> provides extra information, such as 1.109 + * the file name, that a CommandMap implementation may use to further 1.110 + * refine the list of commands that are returned. The implementation 1.111 + * in this class simply calls the <code>getPreferredCommands</code> 1.112 + * method that ignores this argument. 1.113 + * 1.114 + * @param mimeType the MIME type 1.115 + * @param ds a DataSource for the data 1.116 + * @return the CommandInfo classes that represent the command Beans. 1.117 + * @since JAF 1.1 1.118 + */ 1.119 + public CommandInfo[] getPreferredCommands(String mimeType, DataSource ds) { 1.120 + return getPreferredCommands(mimeType); 1.121 + } 1.122 + 1.123 + /** 1.124 + * Get all the available commands for this type. This method 1.125 + * should return all the possible commands for this MIME type. 1.126 + * 1.127 + * @param mimeType the MIME type 1.128 + * @return the CommandInfo objects representing all the commands. 1.129 + */ 1.130 + abstract public CommandInfo[] getAllCommands(String mimeType); 1.131 + 1.132 + /** 1.133 + * Get all the available commands for this type. This method 1.134 + * should return all the possible commands for this MIME type. <p> 1.135 + * 1.136 + * The <code>DataSource</code> provides extra information, such as 1.137 + * the file name, that a CommandMap implementation may use to further 1.138 + * refine the list of commands that are returned. The implementation 1.139 + * in this class simply calls the <code>getAllCommands</code> 1.140 + * method that ignores this argument. 1.141 + * 1.142 + * @param mimeType the MIME type 1.143 + * @param ds a DataSource for the data 1.144 + * @return the CommandInfo objects representing all the commands. 1.145 + * @since JAF 1.1 1.146 + */ 1.147 + public CommandInfo[] getAllCommands(String mimeType, DataSource ds) { 1.148 + return getAllCommands(mimeType); 1.149 + } 1.150 + 1.151 + /** 1.152 + * Get the default command corresponding to the MIME type. 1.153 + * 1.154 + * @param mimeType the MIME type 1.155 + * @param cmdName the command name 1.156 + * @return the CommandInfo corresponding to the command. 1.157 + */ 1.158 + abstract public CommandInfo getCommand(String mimeType, String cmdName); 1.159 + 1.160 + /** 1.161 + * Get the default command corresponding to the MIME type. <p> 1.162 + * 1.163 + * The <code>DataSource</code> provides extra information, such as 1.164 + * the file name, that a CommandMap implementation may use to further 1.165 + * refine the command that is chosen. The implementation 1.166 + * in this class simply calls the <code>getCommand</code> 1.167 + * method that ignores this argument. 1.168 + * 1.169 + * @param mimeType the MIME type 1.170 + * @param cmdName the command name 1.171 + * @param ds a DataSource for the data 1.172 + * @return the CommandInfo corresponding to the command. 1.173 + * @since JAF 1.1 1.174 + */ 1.175 + public CommandInfo getCommand(String mimeType, String cmdName, 1.176 + DataSource ds) { 1.177 + return getCommand(mimeType, cmdName); 1.178 + } 1.179 + 1.180 + /** 1.181 + * Locate a DataContentHandler that corresponds to the MIME type. 1.182 + * The mechanism and semantics for determining this are determined 1.183 + * by the implementation of the particular CommandMap. 1.184 + * 1.185 + * @param mimeType the MIME type 1.186 + * @return the DataContentHandler for the MIME type 1.187 + */ 1.188 + abstract public DataContentHandler createDataContentHandler(String 1.189 + mimeType); 1.190 + 1.191 + /** 1.192 + * Locate a DataContentHandler that corresponds to the MIME type. 1.193 + * The mechanism and semantics for determining this are determined 1.194 + * by the implementation of the particular CommandMap. <p> 1.195 + * 1.196 + * The <code>DataSource</code> provides extra information, such as 1.197 + * the file name, that a CommandMap implementation may use to further 1.198 + * refine the choice of DataContentHandler. The implementation 1.199 + * in this class simply calls the <code>createDataContentHandler</code> 1.200 + * method that ignores this argument. 1.201 + * 1.202 + * @param mimeType the MIME type 1.203 + * @param ds a DataSource for the data 1.204 + * @return the DataContentHandler for the MIME type 1.205 + * @since JAF 1.1 1.206 + */ 1.207 + public DataContentHandler createDataContentHandler(String mimeType, 1.208 + DataSource ds) { 1.209 + return createDataContentHandler(mimeType); 1.210 + } 1.211 + 1.212 + /** 1.213 + * Get all the MIME types known to this command map. 1.214 + * If the command map doesn't support this operation, 1.215 + * null is returned. 1.216 + * 1.217 + * @return array of MIME types as strings, or null if not supported 1.218 + * @since JAF 1.1 1.219 + */ 1.220 + public String[] getMimeTypes() { 1.221 + return null; 1.222 + } 1.223 +}