/*
* 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.extensions.datasources.olap4j.parser;

import org.pentaho.reporting.engine.classic.core.modules.parser.base.common.PasswordPropertiesReadHandler;
import org.pentaho.reporting.engine.classic.extensions.datasources.olap4j.connections.DriverConnectionProvider;
import org.pentaho.reporting.engine.classic.extensions.datasources.olap4j.connections.OlapConnectionProvider;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.PropertiesReadHandler;
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;

import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

/**
 * Creation-Date: 07.04.2006, 18:09:25
 *
 * @author Thomas Morgner
 */
public class DriverConnectionReadHandler extends AbstractXmlReadHandler
  implements OlapConnectionReadHandler {
  private StringReadHandler driverReadHandler;
  private StringReadHandler urlReadHandler;
  private PropertiesReadHandler propertiesReadHandler;
  private DriverConnectionProvider driverConnectionProvider;

  public DriverConnectionReadHandler() {
  }

  /**
   * 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 ( "driver".equals( tagName ) ) {
      driverReadHandler = new StringReadHandler();
      return driverReadHandler;
    }
    if ( "url".equals( tagName ) ) {
      urlReadHandler = new StringReadHandler();
      return urlReadHandler;
    }
    if ( "properties".equals( tagName ) ) {
      propertiesReadHandler = new PasswordPropertiesReadHandler();
      return propertiesReadHandler;
    }
    return null;
  }

  /**
   * Done parsing.
   *
   * @throws SAXException if there is a parsing error.
   */
  protected void doneParsing() throws SAXException {
    final DriverConnectionProvider provider = new DriverConnectionProvider();
    if ( driverReadHandler != null ) {
      provider.setDriver( driverReadHandler.getResult() );
    }
    if ( urlReadHandler != null ) {
      provider.setUrl( urlReadHandler.getResult() );
    }
    if ( propertiesReadHandler != null ) {
      final Properties p = (Properties) propertiesReadHandler.getObject();
      final Iterator it = p.entrySet().iterator();
      while ( it.hasNext() ) {
        final Map.Entry entry = (Map.Entry) it.next();
        provider.setProperty( (String) entry.getKey(), (String) entry.getValue() );
      }
    }
    driverConnectionProvider = provider;
  }

  /**
   * Returns the object for this element or null, if this element does not create an object.
   *
   * @return the object.
   * @throws SAXException if there is a parsing error.
   */
  public Object getObject() throws SAXException {
    return driverConnectionProvider;
  }

  public OlapConnectionProvider getProvider() {
    return driverConnectionProvider;
  }
}