FilterDefinitionFactory.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License, version 2 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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.
 *
 * Copyright 2007 - 2008 Pentaho Corporation.  All rights reserved. 
 * 
 */
package org.pentaho.platform.uifoundation.component.xml;

import org.dom4j.Element;
import org.pentaho.platform.api.engine.ILogger;
import org.pentaho.platform.api.engine.IPentahoSession;
import org.pentaho.platform.uifoundation.component.ActionFilterDefinition;
import org.pentaho.platform.uifoundation.component.FilterDefinition;
import org.pentaho.platform.uifoundation.component.GlobalFilterDefinition;
import org.pentaho.platform.uifoundation.component.SessionFilterDefinition;
import org.pentaho.platform.uifoundation.component.StaticFilterDefinition;
import org.pentaho.platform.util.xml.dom4j.XmlDom4JHelper;

/**
 * Factory up the correct FilterDefinition derived class based on the contents
 * of the <code>node</code>.
 * 
 * @author Steven Barkdull
 * 
 */
public class FilterDefinitionFactory {

  public static FilterDefinition create(final Element node, final IPentahoSession session, final ILogger logger)
      throws FilterPanelException {
    FilterDefinition fd = null;
    String txt = null; // to assist in debugging
    if (null != (txt = XmlDom4JHelper.getNodeText("session-attribute", node))) { //$NON-NLS-1$
      fd = new SessionFilterDefinition(node, session, logger);
    } else if (null != (txt = XmlDom4JHelper.getNodeText("global-attribute", node))) { //$NON-NLS-1$
      fd = new GlobalFilterDefinition(node, session, logger);
    } else if (null != (txt = XmlDom4JHelper.getNodeText("data-solution", node))) { //$NON-NLS-1$
      fd = new ActionFilterDefinition(node, session, logger);
    } else if (null != (txt = XmlDom4JHelper.getNodeText("static-lov", node))) { //$NON-NLS-1$
      fd = new StaticFilterDefinition(node, session, logger);
    } else {
      //
    }
    if (false) {
      System.out.println(txt);
    }
    fd.fromXml(node);

    return fd;
  }
}