/*
 * @(#)CopyobjectDefaults.java	1.9 04/06/21
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.corba.se.spi.copyobject ;

import com.sun.corba.se.spi.orb.ORB ;

import com.sun.corba.se.impl.copyobject.ReferenceObjectCopierImpl ;
import com.sun.corba.se.impl.copyobject.FallbackObjectCopierImpl ;
import com.sun.corba.se.impl.copyobject.ORBStreamObjectCopierImpl ;
import com.sun.corba.se.impl.copyobject.JavaStreamObjectCopierImpl ;

public abstract class CopyobjectDefaults
{
    private CopyobjectDefaults() { }

    /** Obtain the ORB stream copier factory.  Note that this version behaves differently
     * than the others: each ObjectCopier produced by the factory only preserves aliasing
     * within a single call to copy.  The others copiers all preserve aliasing across
     * all calls to copy (on the same ObjectCopier instance).
     */
    public static ObjectCopierFactory makeORBStreamObjectCopierFactory( final ORB orb ) 
    {
	return new ObjectCopierFactory() {
	    public ObjectCopier make( )
	    {
		return new ORBStreamObjectCopierImpl( orb ) ;
	    }
	} ;
    }

    public static ObjectCopierFactory makeJavaStreamObjectCopierFactory( final ORB orb ) 
    {
	return new ObjectCopierFactory() {
	    public ObjectCopier make( )
	    {
		return new JavaStreamObjectCopierImpl( orb ) ;
	    }
	} ;
    }

    private static final ObjectCopier referenceObjectCopier = new ReferenceObjectCopierImpl() ;

    private static ObjectCopierFactory referenceObjectCopierFactory = 
	new ObjectCopierFactory() {
	    public ObjectCopier make() 
	    {
		return referenceObjectCopier ;
	    }
	} ;

    /** Obtain the reference object "copier".  This does no copies: it just
     * returns whatever is passed to it.
     */
    public static ObjectCopierFactory getReferenceObjectCopierFactory()
    {
	return referenceObjectCopierFactory ;
    }

    /** Create a fallback copier factory from the two ObjectCopierFactory
     * arguments.  This copier makes an ObjectCopierFactory that creates
     * instances of a fallback copier that first tries an ObjectCopier
     * created from f1, then tries one created from f2, if the first
     * throws a ReflectiveCopyException.
     */
    public static ObjectCopierFactory makeFallbackObjectCopierFactory( 
	final ObjectCopierFactory f1, final ObjectCopierFactory f2 )
    {
	return new ObjectCopierFactory() {
	    public ObjectCopier make() 
	    {
		ObjectCopier c1 = f1.make() ;
		ObjectCopier c2 = f2.make() ;
		return new FallbackObjectCopierImpl( c1, c2 ) ;
	    }
	} ;
    }
}