content: /*
   * 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 mf.org.apache.xerces.stax;
  
  import mf.javax.xml.stream.Location;
  
  /**
   * <p>Location which always returns <code>-1</code>
   * and <code>null</code> from its methods.</p>
   *
   * @version $Id: EmptyLocation.java 730444 2008-12-31 19:11:29Z mrglavas $
   * @xerces.internal
   */
  public final class EmptyLocation implements Location {
  
      /**
       * Singleton instance.
       */
      private static final EmptyLocation EMPTY_LOCATION_INSTANCE
              = new EmptyLocation();
  
      private EmptyLocation() {
      }
  
      /**
       * Returns the one and only instance of this class.
       */
      public static EmptyLocation getInstance() {
          return EMPTY_LOCATION_INSTANCE;
      }
  
      /**
       * Return the line number where the current event ends,
       * returns -1 if none is available.
       *
       * @return the current line number
       */
      @Override
      public int getLineNumber() {
          return -1;
      }
  
      /**
       * Return the column number where the current event ends,
       * returns -1 if none is available.
       *
       * @return the current column number
       */
      @Override
      public int getColumnNumber() {
          return -1;
      }
  
      /**
       * Return the byte or character offset into the input source this location
       * is pointing to. If the input source is a file or a byte stream then
       * this is the byte offset into that stream, but if the input source is
       * a character media then the offset is the character offset.
       * Returns -1 if there is no offset available.
       *
       * @return the current offset
       */
      @Override
      public int getCharacterOffset() {
          return -1;
      }
  
      /**
       * Returns the public ID of the XML
       *
       * @return the public ID, or null if not available
       */
      @Override
      public String getPublicId() {
          return null;
      }
  
      /**
       * Returns the system ID of the XML
       *
       * @return the system ID, or null if not available
       */
      @Override
      public String getSystemId() {
          return null;
      }
  }
  