163 lines
5.0 KiB
Java
163 lines
5.0 KiB
Java
/* ValueHandlerDelegateImpl.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. */
|
|
|
|
|
|
package gnu.javax.rmi.CORBA;
|
|
|
|
import gnu.CORBA.CDR.gnuRuntime;
|
|
|
|
import org.omg.CORBA.BAD_PARAM;
|
|
import org.omg.CORBA.CustomMarshal;
|
|
import org.omg.CORBA.portable.OutputStream;
|
|
import org.omg.CORBA.portable.Streamable;
|
|
import org.omg.SendingContext.RunTime;
|
|
|
|
import java.io.Externalizable;
|
|
import java.io.ObjectStreamClass;
|
|
import java.io.Serializable;
|
|
import java.rmi.Remote;
|
|
|
|
import javax.rmi.CORBA.ValueHandler;
|
|
import javax.rmi.CORBA.ValueHandlerMultiFormat;
|
|
|
|
/**
|
|
* Implementation of the ValueHandler.
|
|
*
|
|
* @author Audrius Meskauskas (AudriusA@Bioinformatics.org) (implementation)
|
|
*/
|
|
public class ValueHandlerDelegateImpl
|
|
extends RmiUtilities
|
|
implements ValueHandler, ValueHandlerMultiFormat
|
|
{
|
|
/**
|
|
* Return the maximal supported stream format version. We currently
|
|
* support the version 1.
|
|
*
|
|
* TODO Support the version 2.
|
|
*/
|
|
public byte getMaximumStreamFormatVersion()
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Write value using the given stream format version.
|
|
*/
|
|
public void writeValue(OutputStream output, Serializable value, byte version)
|
|
{
|
|
if (version!=1)
|
|
throw new BAD_PARAM("Unsupported stream format version "+version);
|
|
else
|
|
writeValue(output, value);
|
|
}
|
|
|
|
/**
|
|
* This implementation associates RunTime with stream rather than with the
|
|
* value handler and this method is not used in the implementation. It is
|
|
* implemented just for the sake of compatibility.
|
|
*/
|
|
public RunTime getRunTimeCodeBase()
|
|
{
|
|
return new gnuRuntime(null, null);
|
|
}
|
|
|
|
/**
|
|
* Checks if an instance of this class can write its fields itself.
|
|
*/
|
|
public boolean isCustomMarshaled(Class clz)
|
|
{
|
|
return CustomMarshal.class.isAssignableFrom(clz)
|
|
|| Streamable.class.isAssignableFrom(clz);
|
|
}
|
|
|
|
/**
|
|
* No replacement, returns the passed parameter.
|
|
*/
|
|
public Serializable writeReplace(Serializable value)
|
|
{
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* Compute the repository id in the RMI hashed format.
|
|
*/
|
|
public String getRMIRepositoryID(final Class cx)
|
|
{
|
|
long hash = 0;
|
|
Class of = cx.isArray() ? cx.getComponentType() : null;
|
|
|
|
if (cx.equals(String[].class))
|
|
return RMI_STRING_ARRAY_ID;
|
|
else if (cx.equals(String.class))
|
|
return RMI_STRING_ID;
|
|
else if (cx.equals(Class.class))
|
|
return RMI_CLASS_ID;
|
|
else if (Remote.class.isAssignableFrom(cx)
|
|
|| !Serializable.class.isAssignableFrom(cx)
|
|
|| cx.isInterface()
|
|
|| (cx.isArray() && (!Serializable.class.isAssignableFrom(of)
|
|
|| of.isPrimitive() || Remote.class.isAssignableFrom(of)))
|
|
|
|
)
|
|
// Some classes that have zero hash code and serial no version id
|
|
// included.
|
|
return "RMI:" + cx.getName() + ":" + toHex(hash);
|
|
else if (cx.isArray())
|
|
// Arrays have the same hashcode and uid as they components.
|
|
return "RMI:" + cx.getName() + ":" + toHex(getHashCode(of)) + ":"
|
|
+ toHex(getSid(of));
|
|
else
|
|
{
|
|
if (Externalizable.class.isAssignableFrom(cx))
|
|
hash = 1;
|
|
else
|
|
hash = getHashCode(cx);
|
|
|
|
return "RMI:" + cx.getName() + ":" + toHex(hash) + ":"
|
|
+ toHex(getSid(cx));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the class serial version UID.
|
|
*/
|
|
long getSid(Class cx)
|
|
{
|
|
ObjectStreamClass osc = ObjectStreamClass.lookup(cx);
|
|
return osc.getSerialVersionUID();
|
|
}
|
|
} |