/*

  * This file is part of dependency-check-core.

  *

  * Dependency-check-core is free software: you can redistribute it and/or modify it

  * under the terms of the GNU General Public License as published by the Free

  * Software Foundation, either version 3 of the License, or (at your option) any

  * later version.

  *

  * Dependency-check-core 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.

  *

  * You should have received a copy of the GNU General Public License along with

  * dependency-check-core. If not, see http://www.gnu.org/licenses/.

  *

  * Copyright (c) 2013 Jeremy Long. All Rights Reserved.

  */

 package org.owasp.dependencycheck.suppression;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import org.xml.sax.ErrorHandler;

 import org.xml.sax.SAXException;

 import org.xml.sax.SAXParseException;

 /**

  * An XML parsing error handler.

  *

  * @author Jeremy Long (jeremy.long@owasp.org)

  */

 public class SuppressionErrorHandler implements ErrorHandler {

     /**

      * Builds a prettier exception message.

      *

      * @param ex the SAXParseException

      * @return an easier to read exception message

      */

     private String getPrettyParseExceptionInfo(SAXParseException ex) {

         final StringBuffer sb = new StringBuffer();

         if (ex.getSystemId() != null) {

             sb.append("systemId=").append(ex.getSystemId()).append(", ");

         }

         if (ex.getPublicId() != null) {

             sb.append("publicId=").append(ex.getPublicId()).append(", ");

         }

         if (ex.getLineNumber() > 0) {

             sb.append("Line=").append(ex.getLineNumber());

         }

         if (ex.getColumnNumber() > 0) {

             sb.append(", Column=").append(ex.getColumnNumber());

         }

         sb.append(": ").append(ex.getMessage());

         return sb.toString();

     }

     /**

      * Logs warnings.

      *

      * @param ex the warning to log

      * @throws SAXException is never thrown

      */

     @Override

     public void warning(SAXParseException ex) throws SAXException {

         Logger.getLogger(SuppressionErrorHandler.class.getName()).log(Level.FINE, null, ex);

     }

     /**

      * Handles errors.

      *

      * @param ex the error to handle

      * @throws SAXException is always thrown

      */

     @Override

     public void error(SAXParseException ex) throws SAXException {

         throw new SAXException(getPrettyParseExceptionInfo(ex));

     }

     /**

      * Handles fatal exceptions.

      *

      * @param ex a fatal exception

      * @throws SAXException is always

      */

     @Override

     public void fatalError(SAXParseException ex) throws SAXException {

         throw new SAXException(getPrettyParseExceptionInfo(ex));

     }

 }