code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-2.0
   *
   * 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.apache.commons.io.input;
  
  import java.io.IOException;
  
  /**
   * The XmlStreamReaderException is thrown by the XmlStreamReader constructors if
   * the charset encoding can not be determined according to the XML 1.0
   * specification and RFC 3023.
   * <p>
   * The exception returns the unconsumed InputStream to allow the application to
   * do an alternate processing with the stream. Note that the original
   * InputStream given to the XmlStreamReader cannot be used as that one has been
   * already read.
   *
   * @author Alejandro Abdelnur
   * @version $Id: XmlStreamReaderException.java,v 1.1.2.1 2011/01/15 20:32:23 caniszczyk Exp $
   * @since Commons IO 2.0
   */
  public class XmlStreamReaderException extends IOException {
  
      private static final long serialVersionUID = 1L;
  
      private final String bomEncoding;
  
      private final String xmlGuessEncoding;
  
      private final String xmlEncoding;
  
      private final String contentTypeMime;
  
      private final String contentTypeEncoding;
  
      /**
       * Creates an exception instance if the charset encoding could not be
       * determined.
       * <p>
       * Instances of this exception are thrown by the XmlStreamReader.
       *
       * @param msg message describing the reason for the exception.
       * @param bomEnc BOM encoding.
       * @param xmlGuessEnc XML guess encoding.
       * @param xmlEnc XML prolog encoding.
       */
      public XmlStreamReaderException(String msg, String bomEnc,
              String xmlGuessEnc, String xmlEnc) {
          this(msg, null, null, bomEnc, xmlGuessEnc, xmlEnc);
      }
  
      /**
       * Creates an exception instance if the charset encoding could not be
       * determined.
       * <p>
       * Instances of this exception are thrown by the XmlStreamReader.
       *
       * @param msg message describing the reason for the exception.
       * @param ctMime MIME type in the content-type.
       * @param ctEnc encoding in the content-type.
       * @param bomEnc BOM encoding.
       * @param xmlGuessEnc XML guess encoding.
       * @param xmlEnc XML prolog encoding.
       */
      public XmlStreamReaderException(String msg, String ctMime, String ctEnc,
              String bomEnc, String xmlGuessEnc, String xmlEnc) {
          super(msg);
          contentTypeMime = ctMime;
          contentTypeEncoding = ctEnc;
          bomEncoding = bomEnc;
          xmlGuessEncoding = xmlGuessEnc;
          xmlEncoding = xmlEnc;
      }
  
      /**
       * Returns the BOM encoding found in the InputStream.
       *
       * @return the BOM encoding, null if none.
       */
      public String getBomEncoding() {
          return bomEncoding;
      }
  
      /**
       * Returns the encoding guess based on the first bytes of the InputStream.
       *
       * @return the encoding guess, null if it couldn't be guessed.
       */
      public String getXmlGuessEncoding() {
          return xmlGuessEncoding;
      }
  
      /**
       * Returns the encoding found in the XML prolog of the InputStream.
       *
       * @return the encoding of the XML prolog, null if none.
       */
      public String getXmlEncoding() {
          return xmlEncoding;
      }
  
      /**
       * Returns the MIME type in the content-type used to attempt determining the
       * encoding.
       *
       * @return the MIME type in the content-type, null if there was not
       *         content-type or the encoding detection did not involve HTTP.
       */
      public String getContentTypeMime() {
          return contentTypeMime;
      }
  
      /**
       * Returns the encoding in the content-type used to attempt determining the
       * encoding.
       *
       * @return the encoding in the content-type, null if there was not
       *         content-type, no encoding in it or the encoding detection did not
       *         involve HTTP.
       */
      public String getContentTypeEncoding() {
          return contentTypeEncoding;
      }
  }
  