/*!
* 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) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.extensions.datasources.mondrian.parser;

import org.pentaho.reporting.engine.classic.extensions.datasources.mondrian.DataSourceProvider;
import org.pentaho.reporting.engine.classic.extensions.datasources.mondrian.JndiDataSourceProvider;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.StringReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
 * Todo: Document me!
 * <p/>
 * Date: 25.08.2009 Time: 10:09:05
 *
 * @author Thomas Morgner.
 */
public class JndiDataSourceProviderReadHandler extends AbstractXmlReadHandler implements DataSourceProviderReadHandler {
  private StringReadHandler pathReadHandler;
  private JndiDataSourceProvider dataSourceProvider;

  public JndiDataSourceProviderReadHandler() {
  }

  /**
   * Returns the object for this element or null, if this element does not create an object.
   *
   * @return the object.
   * @throws org.xml.sax.SAXException if an parser error occured.
   */
  public Object getObject() throws SAXException {
    return getProvider();
  }


  /**
   * Returns the handler for a child element.
   *
   * @param tagName the tag name.
   * @param atts    the attributes.
   * @return the handler or null, if the tagname is invalid.
   * @throws SAXException if there is a parsing error.
   */
  protected XmlReadHandler getHandlerForChild( final String uri,
                                               final String tagName,
                                               final Attributes atts )
    throws SAXException {
    if ( isSameNamespace( uri ) == false ) {
      return null;
    }
    if ( "path".equals( tagName ) ) {
      pathReadHandler = new StringReadHandler();
      return pathReadHandler;
    }
    return null;
  }

  /**
   * Done parsing.
   *
   * @throws SAXException if there is a parsing error.
   */
  protected void doneParsing() throws SAXException {
    if ( pathReadHandler == null ) {
      throw new ParseException( "JNDI connections need a JNDI path", getLocator() );
    }
    this.dataSourceProvider = new JndiDataSourceProvider( pathReadHandler.getResult() );
  }

  protected String getPath() {
    return pathReadHandler.getResult();
  }


  public DataSourceProvider getProvider() {
    return dataSourceProvider;
  }
}