/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2004 Gerald Brose
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
package org.jacorb.collection;
import org.jacorb.collection.util.ObjectComparator;
import org.jacorb.collection.util.ObjectInvalid;
import org.omg.CORBA.Any;
import org.omg.CosCollection.OperationsOperations;
class SequenceComparator implements ObjectComparator {
private OperationsOperations ops;
private Any current = null;
/* ------------------------------------------------------------------------- */
SequenceComparator( OperationsOperations ops ) {
this.ops = ops;
}
/* ------------------------------------------------------------------------- */
public synchronized int compare( Object obj1, Object obj2 ) throws ObjectInvalid {
if( obj1 == null || obj2 == null ){
throw new ObjectInvalid();
}
check_object( obj1 );
check_object( obj2 );
return ops.compare( (Any)obj1, (Any)obj2 );
}
/* ------------------------------------------------------------------------- */
public synchronized void element( Object obj ) throws ObjectInvalid {
check_object( obj );
current = (Any) obj;
}
/* ------------------------------------------------------------------------- */
public synchronized Object element() {
return current;
}
/* ------------------------------------------------------------------------- */
public synchronized int compare_with( Object obj ) throws ObjectInvalid {
if( obj == null || current == null ) {
throw new ObjectInvalid();
}
check_object( obj );
return ops.compare( current, (Any)obj );
}
/* ------------------------------------------------------------------------- */
public synchronized boolean equal( Object obj1, Object obj2 ) throws ObjectInvalid {
if( obj1 == null || obj2 == null ){
throw new ObjectInvalid();
}
check_object( obj1 );
check_object( obj2 );
return ops.equal( (Any)obj1, (Any)obj2 );
}
/* ------------------------------------------------------------------------- */
public synchronized boolean equal( Object obj1 ) throws ObjectInvalid {
if( obj1 == null || current == null ) {
throw new ObjectInvalid();
}
check_object( obj1 );
return ops.equal( current, (Any)obj1 );
}
/* ------------------------------------------------------------------------- */
private void check_object( Object obj ) throws ObjectInvalid {
if( !( obj instanceof Any )
|| !((Any)obj).type().equal( ops.element_type() ) ){
throw new ObjectInvalid();
}
}
}