/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s):
* 03-05-2005:
* The Australian Commonwealth Government
* Department of Defense
* Developed by Netymon Pty Ltd
* under contract 4500430665
* contributed to the Mulgara Project under the
* Mozilla Public License version 1.1
* per clause 4.1.3 of the above contract.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.resolver.spi;
// Java 2 standard packages
import java.util.Map;
// Local packages
import org.mulgara.query.ConstraintExpression;
import org.mulgara.query.Value;
import org.mulgara.query.Variable;
/**
* Instances of this interface define how to bind variables to known
* values.
*
* This is used to implement Subqueries and Aggregates which have specific bindings
* imported
*
* Note: This is not an identity operation like reresolve is. Subqueries are evaluated in
* a series of evaluation environments, similar to a closure. Each result in the outer query
* is an independent evaluation environment, and hence the appropriate analogy is
* beta-reduction, NOT equivalence-transformation.
*
* @created 2005-05-05
* @author <a href="http://netymon.com/people/staff/andrae">Andrae Muys</a>
* @version $Revision: 1.1 $
* @modified $Date: 2005/05/06 04:07:58 $ by $Author: amuys $
* @maintenanceAuthor $Author: amuys $
* @copyright ©2005 <a href="http://www.defence.gov.au/">
* Australian Commonwealth Government, Department of Defence</a>
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public interface ConstraintBindingHandler
{
/**
* Rebind ConstraintExpression given a known set of variable bindings.
*
*/
public ConstraintExpression bindVariables(Map<Variable,Value> bindings,
ConstraintExpression constraintExpr) throws Exception;
}