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javax.rmi.CORBA

Interface ValueHandlerMultiFormat

All Superinterfaces:
ValueHandler
Known Implementing Classes:
ValueHandlerDelegateImpl
public interface ValueHandlerMultiFormat
extends ValueHandler
This interface extends the previous ValueHandler, supporting various stream format versions. The ValueHandler can be casted into this interface to access additional features.
Since:
1.5

Method Summary

byte
getMaximumStreamFormatVersion()
Get the maximal supported version for the value types, supported by this value handler.
void
writeValue(OutputStream output, Serializable value, byte version)
Write the value type to the output stream using the given format version.

Methods inherited from interface javax.rmi.CORBA.ValueHandler

getRMIRepositoryID, getRunTimeCodeBase, isCustomMarshaled, readValue, writeReplace, writeValue

Method Details

getMaximumStreamFormatVersion

public byte getMaximumStreamFormatVersion()
Get the maximal supported version for the value types, supported by this value handler. The versions are integer numbers, the currently valid values being 1 and 2. These two versions differ in how the additional data, stored by the writeObject method, are encoded.
  • For version 1 (GNU Classpath default), that data (if present) are written "as is".
  • For version 2, this data fragment is enclosed within a CDR custom valuetype with no codebase and repository Id "RMI:org.omg.custom." where is the fully-qualified name of the class whose writeObject method is being invoked. If the object does not write any data via writeObject method, the null valuetype (0x0) must be written.
As the version number is part of the value type record, there is no need to the format control during the reading.
Returns:
the maximal supported version.

writeValue

public void writeValue(OutputStream output,
                       Serializable value,
                       byte version)
Write the value type to the output stream using the given format version. The older method ValueHandler.writeValue(OutputStream,Serializable) always uses the version 1.
Parameters:
output - the stream, where the value should be written, must implement ValueOutputStream.
value - the value that should be written.
version - the version of the format that must be used to write the value.
ValueHandlerMultiFormat.java -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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