content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * For further information about Alkacon Software GmbH & Co. KG, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.xml;
  
  import org.opencms.util.CmsStringUtil;
  
  import org.dom4j.DocumentHelper;
  import org.dom4j.Element;
  import org.dom4j.util.XMLErrorHandler;
  import org.xml.sax.SAXParseException;
  
  /**
   * Error hander for writing errors found during XML validation to the OpenCms log.<p>
   *
   * Exceptions caused by warnings are suppressed (but written to the log if level is set to WARN).<p>
   *
   * @since 6.0.0
   */
  public class CmsXmlValidationErrorHandler extends XMLErrorHandler {
  
      /** Stores the warnings that occur during a SAX parse. */
      private Element m_warnings;
  
      /**
       * Constructor from superclass.<p>
       */
      public CmsXmlValidationErrorHandler() {
  
          super();
          m_warnings = DocumentHelper.createElement("warnings");
      }
  
      /**
       * @see org.xml.sax.ErrorHandler#error(org.xml.sax.SAXParseException)
       */
      @Override
      public void error(SAXParseException e) {
  
          String message = e.getMessage();
          if (CmsStringUtil.isNotEmpty(message)) {
  
              if (message.startsWith("sch-props-correct.2")) {
                  // HACK: multiple schema includes cause errors in validation with Xerces 2
                  // the schema nevertheless is usable
                  // redirect this error to be a warning
                  warning(e);
                  return;
              }
          }
  
          super.error(e);
      }
  
      /**
       * Returns the warnings.<p>
       *
       * @return the warnings
       */
      public Element getWarnings() {
  
          return m_warnings;
      }
  
      /**
       * @see org.dom4j.util.XMLErrorHandler#warning(org.xml.sax.SAXParseException)
       */
      @Override
      public void warning(SAXParseException e) {
  
          Element element = m_warnings.addElement(WARNING_QNAME);
          addException(element, e);
      }
  }