/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.btree.algebra;
import com.db4o.internal.btree.*;
/**
* @exclude
*/
public abstract class BTreeRangeOperation implements BTreeRangeVisitor {
private BTreeRange _resultingRange;
public BTreeRangeOperation() {
super();
}
public BTreeRange dispatch(BTreeRange range) {
range.accept(this);
return _resultingRange;
}
public final void visit(BTreeRangeSingle single) {
_resultingRange = execute(single);
}
public final void visit(BTreeRangeUnion union) {
_resultingRange = execute(union);
}
protected abstract BTreeRange execute(BTreeRangeUnion union);
protected abstract BTreeRange execute(BTreeRangeSingle single);
}