001/* UtilDelegate.java -- 002 Copyright (C) 2002, 2005 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. */ 037 038 039package javax.rmi.CORBA; 040 041import org.omg.CORBA.Any; 042import org.omg.CORBA.BAD_PARAM; 043import org.omg.CORBA.COMM_FAILURE; 044import org.omg.CORBA.CompletionStatus; 045import org.omg.CORBA.INVALID_TRANSACTION; 046import org.omg.CORBA.INV_OBJREF; 047import org.omg.CORBA.MARSHAL; 048import org.omg.CORBA.NO_PERMISSION; 049import org.omg.CORBA.OBJECT_NOT_EXIST; 050import org.omg.CORBA.OMGVMCID; 051import org.omg.CORBA.ORB; 052import org.omg.CORBA.SystemException; 053import org.omg.CORBA.TRANSACTION_REQUIRED; 054import org.omg.CORBA.TRANSACTION_ROLLEDBACK; 055import org.omg.CORBA.TypeCode; 056import org.omg.CORBA.portable.InputStream; 057import org.omg.CORBA.portable.OutputStream; 058 059import java.rmi.AccessException; 060import java.rmi.MarshalException; 061import java.rmi.NoSuchObjectException; 062import java.rmi.Remote; 063import java.rmi.RemoteException; 064import java.rmi.ServerError; 065import java.rmi.ServerException; 066import java.rmi.UnexpectedException; 067 068import javax.transaction.InvalidTransactionException; 069import javax.transaction.TransactionRequiredException; 070import javax.transaction.TransactionRolledbackException; 071 072/** 073 * A delegate, implementing the functionality, provided by the {@link Util}. 074 * 075 * The default delegate can be altered by setting the system property 076 * "javax.rmi.CORBA.UtilClass" to the name of the alternative class that must 077 * implement this interface. 078 * 079 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) 080 */ 081public interface UtilDelegate 082{ 083 /** 084 * Used by local stubs to create a copy of the object. 085 */ 086 Object copyObject(Object obj, ORB orb) 087 throws RemoteException; 088 089 /** 090 * Used by local stubs to create a multiple copies of the object, preserving 091 * sharing accross the parameters if necessary. 092 */ 093 Object[] copyObjects(Object[] obj, ORB orb) 094 throws RemoteException; 095 096 /** 097 * Get the value handler that Serializes Java objects to and from CDR (GIOP) 098 * streams. 099 */ 100 ValueHandler createValueHandler(); 101 102 String getCodebase(Class clz); 103 104 /** 105 * Checks if the given stub is local. 106 */ 107 boolean isLocal(Stub stub) 108 throws RemoteException; 109 110 Class loadClass(String className, String remoteCodebase, ClassLoader loader) 111 throws ClassNotFoundException; 112 113 /** 114 * Converts CORBA {@link SystemException} into RMI {@link RemoteException}. 115 * The exception is converted as defined in the following table: 116 * <p> 117 * <table border = "1"> 118 * <tr> 119 * <th>CORBA Exception</th> 120 * <th>RMI Exception</th> 121 * </tr> 122 * <tr> 123 * <td>{@link COMM_FAILURE}</td> 124 * <td>{@link MarshalException}</td> 125 * </tr> 126 * <tr> 127 * <td>{@link INV_OBJREF}</td> 128 * <td>{@link NoSuchObjectException}</td> 129 * </tr> 130 * <tr> 131 * <td>{@link NO_PERMISSION}</td> 132 * <td>{@link AccessException}</td> 133 * </tr> 134 * <tr> 135 * <td>{@link MARSHAL}</td> 136 * <td>{@link MarshalException}</td> 137 * </tr> 138 * <tr> 139 * <td>{@link BAD_PARAM} (all other cases)</td> 140 * <td>{@link MarshalException}</td> 141 * </tr> 142 * <tr> 143 * <td>{@link OBJECT_NOT_EXIST}</td> 144 * <td>{@link NoSuchObjectException}</td> 145 * </tr> 146 * <tr> 147 * <td>{@link TRANSACTION_REQUIRED}</td> 148 * <td>{@link TransactionRequiredException}</td> 149 * </tr> 150 * <tr> 151 * <td>{@link TRANSACTION_ROLLEDBACK}</td> 152 * <td>{@link TransactionRolledbackException}</td> 153 * </tr> 154 * <tr> 155 * <td>{@link INVALID_TRANSACTION}</td> 156 * <td>{@link InvalidTransactionException}</td> 157 * </tr> 158 * <tr> 159 * <td bgcolor="lightgray">Any other {@link SystemException}</td> 160 * <td bgcolor="lightgray">{@link RemoteException}</td> 161 * </tr> 162 * </table> 163 * </p> 164 * <p> 165 * The exception detailed message always consists of 166 * <ol> 167 * <li>the string "CORBA "</li> 168 * <li>the CORBA name of the system exception</li> 169 * <li>single space</li> 170 * <li>the hexadecimal value of the system exception's minor code, preceeded 171 * by 0x (higher bits contain {@link OMGVMCID}).</li> 172 * <li>single space</li> 173 * <li>the {@link CompletionStatus} of the exception: "Yes", "No" or "Maybe".</li> 174 * </ol> 175 * The subsequent content is not part of the official RMI-IIOP standart and is 176 * added for compatibility with Sun's implementation: 177 * <ol> 178 * <li>the phrase "<code>; nested exception is: <i>(line feed)(tab)</i></code>"</li> 179 * <li>the full name of the mapped SystemException, as returned by 180 * Class.getName().</li> 181 * <li>the ": ". 182 * <li>the value, returned by .getMessage() of the passed parameter.</li> 183 * </ol> 184 * <p> 185 * For instance, if the Internet connection was refused: 186 * </p><p> 187 * <code>CORBA COMM_FAILURE 0x535500C9 No</code> 188 * </p><p> 189 * The original CORBA exception is set as the cause of the RemoteException 190 * being created. 191 * </p> 192 */ 193 RemoteException mapSystemException(SystemException ex); 194 195 /** 196 * Get the Tie that handles invocations on the given target. The target/Tie 197 * pair must be previously registered using {@link #registerTarget}. 198 * 199 * @return the Tie, or null if no such is known. 200 */ 201 Tie getTie(Remote target); 202 203 /** 204 * Register the Tie-target pair. 205 */ 206 void registerTarget(Tie tie, Remote target); 207 208 /** 209 * Deactivate the associated Tie, if it is found and is not connected to other 210 * registered targets. 211 */ 212 void unexportObject(Remote target) 213 throws NoSuchObjectException; 214 215 /** 216 * Converts the exception that was thrown by the implementation method on a 217 * server side into RemoteException that can be transferred and re-thrown on a 218 * client side. The method converts exceptions as defined in the following 219 * table: <table border = "1"> 220 * <tr> 221 * <th>Exception to map (or subclass)</th> 222 * <th>Maps into</th> 223 * </tr> 224 * <tr> 225 * <td>{@link Error}</td> 226 * <td>{@link ServerError}</td> 227 * </tr> 228 * <tr> 229 * <td>{@link RemoteException}</td> 230 * <td>{@link ServerException}</td> 231 * </tr> 232 * <tr> 233 * <td>{@link SystemException}</td> 234 * <td>wrapException({@link #mapSystemException})</td> 235 * </tr> 236 * <tr> 237 * <td>{@link RuntimeException}</td> 238 * <td><b>rethrows</b></td> 239 * </tr> 240 * <tr> 241 * <td>Any other exception</td> 242 * <td>{@link UnexpectedException}</td> 243 * </tr> 244 * </table> 245 * 246 * @param e an exception that was thrown on a server side implementation. 247 * 248 * @return the corresponding RemoteException unless it is a RuntimeException. 249 * 250 * @throws RuntimeException the passed exception if it is an instance of 251 * RuntimeException. 252 * 253 * @specnote It is the same behavior, as in Suns implementations 1.4.0-1.5.0. 254 */ 255 RemoteException wrapException(Throwable orig); 256 257 /** 258 * Write the passed parameter to the output stream as CORBA object. If the 259 * parameter is an instance of Remote and not an instance of Stub, the method 260 * instantiates a suitable Tie, connects the parameter to this Tie and then 261 * connects that Tie to the ORB that is requested from the output stream. Then 262 * the object reference is written to the stream, making remote invocations 263 * possible. This method is used in write_value(..) method group in 264 * {@link org.omg.CORBA_2_3.portable.OutputStream} and also may be called 265 * directly from generated Stubs and Ties. 266 * 267 * @param output a stream to write to, must be 268 * org.omg.CORBA_2_3.portable.OutputStream 269 * @param obj an object to write. 270 */ 271 void writeRemoteObject(OutputStream output, Object obj); 272 273 /** 274 * Write abstract interface to the CORBA output stream. The write format is 275 * matching CORBA abstract interface. Remotes and CORBA objects are written as 276 * objects, other classes are supposed to be value types and are written as 277 * such. {@link Remote}s are processed as defined in 278 * {@link #writeRemoteObject}. The written data contains discriminator, 279 * defining, that was written. Another method that writes the same content is 280 * {@link org.omg.CORBA_2_3.portable.OutputStream#write_abstract_interface(java.lang.Object)}. 281 * 282 * @param output a stream to write to, must be 283 * {@link org.omg.CORBA_2_3.portable.OutputStream}. 284 * 285 * @param object an object to write, must be CORBA object, Remote 286 */ 287 void writeAbstractObject(OutputStream output, Object object); 288 289 /** 290 * Write the passed java object to the output stream in the form of the CORBA 291 * {@link Any}. This includes creating an writing the object {@link TypeCode} 292 * first. Such Any can be later read by a non-RMI-IIOP CORBA implementation 293 * and manipulated, for instance, by means, provided in 294 * {@link org.omg.DynamicAny.DynAny}. Depending from the passed value, this 295 * method writes CORBA object, value type or value box. For value types Null 296 * is written with the abstract interface, its typecode having repository id 297 * "IDL:omg.org/CORBA/AbstractBase:1.0" and the empty string name. 298 * 299 * @param output the object to write. 300 * @param object the java object that must be written in the form of the CORBA 301 * {@link Any}. 302 */ 303 void writeAny(OutputStream output, Object object); 304 305 /** 306 * Read Any from the input stream. 307 */ 308 Object readAny(InputStream input); 309 310}