/*
    * Copyright 2007 The Kuali Foundation
    * 
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * 
    * http://www.opensource.org/licenses/ecl2.php
    * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.kuali.ole.exception;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.xml.sax.ErrorHandler;
  import org.xml.sax.SAXParseException;
  
  /**
   * Defines exception-handling for the XML parses
   */
  public class XmlErrorHandler implements ErrorHandler {
      // TODO: need to use SLF4j here.
      private static Logger LOG = LoggerFactory.getLogger(XmlErrorHandler.class);
  
      public XmlErrorHandler() {
      }
  
      public void warning(SAXParseException e) {
          String parseMessage = assembleMessage("warning", e);
          LOG.error(parseMessage);
          throw new ParseException(parseMessage, e);
      }
  
      public void error(SAXParseException e) {
          String parseMessage = assembleMessage("error", e);
          LOG.error(parseMessage);
          throw new ParseException(parseMessage, e);
      }
  
      public void fatalError(SAXParseException e) {
          String parseMessage = assembleMessage("fatal error", e);
          LOG.error(parseMessage);
          throw new ParseException(parseMessage, e);
      }
  
      private String assembleMessage(String messageType, SAXParseException e) {
          StringBuffer message = new StringBuffer(messageType);
          message.append(" Parsing error was encountered on line ");
          message.append(e.getLineNumber());
          message.append(", column ");
          message.append(e.getColumnNumber());
          message.append(": ");
          message.append(e.getMessage());
  
          return message.toString();
      }
  }