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.
   */
  /*
   * $Id$
   */
  package org.apache.xml.utils;
  
  import java.io.Serializable;
  
  import javax.xml.transform.SourceLocator;
  
  import org.xml.sax.Locator;
  import org.xml.sax.SAXParseException;
  import org.xml.sax.helpers.LocatorImpl;
  
  /**
   * Class SAXSourceLocator extends org.xml.sax.helpers.LocatorImpl
   * for the purpose of implementing the SourceLocator interface, 
   * and thus can be both a SourceLocator and a SAX Locator.
   */
  public class SAXSourceLocator extends LocatorImpl
          implements SourceLocator, Serializable
  {
      static final long serialVersionUID = 3181680946321164112L;
    /** The SAX Locator object.
     *  @serial
     */
    Locator m_locator;
  
    /**
     * Constructor SAXSourceLocator
     *
     */
    public SAXSourceLocator(){}
  
    /**
     * Constructor SAXSourceLocator
     *
     *
     * @param locator Source locator
     */
    public SAXSourceLocator(Locator locator)
    {
      m_locator = locator;
      this.setColumnNumber(locator.getColumnNumber());
      this.setLineNumber(locator.getLineNumber());
      this.setPublicId(locator.getPublicId());
      this.setSystemId(locator.getSystemId());
    }
    
    /**
     * Constructor SAXSourceLocator
     *
     *
     * @param locator Source locator
     */
    public SAXSourceLocator(javax.xml.transform.SourceLocator locator)
    {
      m_locator = null;
      this.setColumnNumber(locator.getColumnNumber());
      this.setLineNumber(locator.getLineNumber());
      this.setPublicId(locator.getPublicId());
      this.setSystemId(locator.getSystemId());
    }
  
    
    /**
     * Constructor SAXSourceLocator
     *
     *
     * @param spe SAXParseException exception.
     */
    public SAXSourceLocator(SAXParseException spe)
    {
      this.setLineNumber( spe.getLineNumber() );
      this.setColumnNumber( spe.getColumnNumber() );
      this.setPublicId( spe.getPublicId() );
      this.setSystemId( spe.getSystemId() );
    }
    
    /**
     * Return the public identifier for the current document event.
     *
     * <p>The return value is the public identifier of the document
     * entity or of the external parsed entity in which the markup
     * triggering the event appears.</p>
     *
     * @return A string containing the public identifier, or
     *         null if none is available.
     * @see #getSystemId
     */
    public String getPublicId()
    {
      return (null == m_locator) ? super.getPublicId() : m_locator.getPublicId();
    }
  
    /**
     * Return the system identifier for the current document event.
     *
     * <p>The return value is the system identifier of the document
     * entity or of the external parsed entity in which the markup
     * triggering the event appears.</p>
     *
     * <p>If the system identifier is a URL, the parser must resolve it
     * fully before passing it to the application.</p>
     *
     * @return A string containing the system identifier, or null
     *         if none is available.
     * @see #getPublicId
     */
    public String getSystemId()
    {
      return (null == m_locator) ? super.getSystemId() : m_locator.getSystemId();
    }
    
    /**
     * Return the line number where the current document event ends.
     *
     * <p><strong>Warning:</strong> The return value from the method
     * is intended only as an approximation for the sake of error
     * reporting; it is not intended to provide sufficient information
     * to edit the character content of the original XML document.</p>
     *
     * <p>The return value is an approximation of the line number
     * in the document entity or external parsed entity where the
     * markup triggering the event appears.</p>
     *
     * @return The line number, or -1 if none is available.
     * @see #getColumnNumber
     */
    public int getLineNumber()
    {
      return (null == m_locator) ? super.getLineNumber() : m_locator.getLineNumber();
    }
  
    /**
     * Return the column number where the current document event ends.
     *
     * <p><strong>Warning:</strong> The return value from the method
     * is intended only as an approximation for the sake of error
     * reporting; it is not intended to provide sufficient information
     * to edit the character content of the original XML document.</p>
     *
     * <p>The return value is an approximation of the column number
     * in the document entity or external parsed entity where the
     * markup triggering the event appears.</p>
     *
     * @return The column number, or -1 if none is available.
     * @see #getLineNumber
     */
    public int getColumnNumber()
    {
      return (null == m_locator) ? super.getColumnNumber() : m_locator.getColumnNumber();
    }
  }
  