package com.dbxml.db.common.xupdate;

/*
 * dbXML - Native XML Database
 * Copyright (C) 1999-2004  The dbXML Group, L.L.C.
 *
 * This program 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
 * of the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id: XUpdateQueryResolver.java,v 1.2 2004/02/12 00:17:56 bradford Exp $
 */

import com.dbxml.db.common.query.QueryBase;
import com.dbxml.db.common.query.QueryResolverBase;
import com.dbxml.db.core.Collection;
import com.dbxml.db.core.data.Key;
import com.dbxml.db.core.query.QueryException;
import com.dbxml.xml.NamespaceMap;
import org.xmldb.common.xml.queries.XPathQueryFactory;

/**
 * XUpdateQueryResolver
 */

public final class XUpdateQueryResolver extends QueryResolverBase {
   private static final Class XUPDATE_XPATH_PROP_CLASS = XPathQueryFactory.class;
   private static final String XUPDATE_XPATH_PROP = XUPDATE_XPATH_PROP_CLASS.getName();
   
   private static final Class XUPDATE_XPATH_IMPL_CLASS = XPathQueryFactoryImpl.class;
   private static final String XUPDATE_XPATH_IMPL = XUPDATE_XPATH_IMPL_CLASS.getName();

   public static final String STYLE_XUPDATE = "XUpdate";

   static {
      System.setProperty(XUPDATE_XPATH_PROP, XUPDATE_XPATH_IMPL);
   }

   public String getQueryStyle() {
      return STYLE_XUPDATE;
   }

   public QueryBase createQuery(Collection context, String query, NamespaceMap nsMap, Key[] keys) throws QueryException {
      return new XUpdateQuery(context, query, nsMap, keys);
   }
}
