package com.dbxml.db.common.btree;

/*
 * 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: PageFilterService.java,v 1.1 2004/06/04 19:53:30 bradford Exp $
 */

import com.dbxml.db.core.ClassResolver;
import com.dbxml.db.server.SimpleService;
import com.dbxml.util.Configurable;
import com.dbxml.util.Configuration;
import com.dbxml.util.ConfigurationCallback;
import com.dbxml.util.dbXMLException;

/**
 * PageFilterService
 */

public final class PageFilterService extends SimpleService {
   private static final String PAGEFILTER = "pagefilter";
   private static final String CLASS = "class";

   public void setConfig(Configuration config) throws dbXMLException {
      super.setConfig(config);

      config.processChildren(PAGEFILTER, new ConfigurationCallback() {
         public void process(Configuration cfg) {
            String className = cfg.getAttribute(CLASS);
            try {
               PageFilter pageFilter = (PageFilter)ClassResolver.get(className).newInstance();
               if ( pageFilter instanceof Configurable )
                  ((Configurable)pageFilter).setConfig(cfg);
               Paged.addPageFilter(pageFilter);
            }
            catch ( Exception e ) {
               System.err.println("PageFilter '" + className + "' not available");
            }
         }
      });
   }
}
