/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.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 Lesser General Public License for more details.
 *
 * Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors..  All rights reserved.
 */

package org.pentaho.reporting.engine.classic.core.modules.parser.simple.readhandlers;

import org.pentaho.reporting.engine.classic.core.elementfactory.ContentFieldElementFactory;
import org.pentaho.reporting.engine.classic.core.elementfactory.ElementFactory;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.PropertyAttributes;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.xml.sax.SAXException;

public class DrawableFieldReadHandler extends AbstractElementReadHandler {
  private ContentFieldElementFactory elementFactory;

  public DrawableFieldReadHandler() {
    this.elementFactory = new ContentFieldElementFactory();
  }

  /**
   * Starts parsing.
   *
   * @param atts
   *          the attributes.
   * @throws org.xml.sax.SAXException
   *           if there is a parsing error.
   */
  protected void startParsing( final PropertyAttributes atts ) throws SAXException {
    super.startParsing( atts );

    final String fieldName = atts.getValue( getUri(), "fieldname" );
    if ( fieldName != null ) {
      elementFactory.setFieldname( fieldName );
    } else {
      final String formula = atts.getValue( getUri(), "formula" );
      if ( formula == null ) {
        throw new ParseException( "Either 'fieldname' or 'formula' attribute must be given.", getLocator() );
      }
      elementFactory.setFormula( formula );
    }
  }

  protected ElementFactory getElementFactory() {
    return elementFactory;
  }
}