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 * obtain a copy of the License at
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/*
 * $Id: SAXSourceLocator.java,v 1.8 2010-11-01 04:34:52 joehw Exp $
 */
package com.sun.org.apache.xml.internal.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.
   *
   * 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.
   *
   * @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.
   *
   * 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.
   *
   * If the system identifier is a URL, the parser must resolve it
   * fully before passing it to the application.
   *
   * @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.
   *
   * Warning: 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.
   *
   * 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.
   *
   * @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.
   *
   * Warning: 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.
   *
   * 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.
   *
   * @return The column number, or -1 if none is available.
   * @see #getLineNumber
   */
  public int getColumnNumber()
  {
    return (null == m_locator) ? super.getColumnNumber() : m_locator.getColumnNumber();
  }
}