uri.java

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        if (testChar == '%')
        {
          if (index + 2 >= end ||!isHex(p_uriSpec.charAt(index + 1))
                  ||!isHex(p_uriSpec.charAt(index + 2)))
          {
            throw new MalformedURIException(
              "Fragment contains invalid escape sequence!");
          }
        }
        else if (!isReservedCharacter(testChar)
                 &&!isUnreservedCharacter(testChar))
        {
          throw new MalformedURIException(
            "Fragment contains invalid character:" + testChar);
        }

        index++;
      }

      m_fragment = p_uriSpec.substring(start, index);
    }
  }

  /**
   * Get the scheme for this URI.
   *
   * @return the scheme for this URI
   */
  public String getScheme()
  {
    return m_scheme;
  }

  /**
   * Get the scheme-specific part for this URI (everything following the
   * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
   *
   * @return the scheme-specific part for this URI
   */
  public String getSchemeSpecificPart()
  {

    StringBuffer schemespec = new StringBuffer();

    if (m_userinfo != null || m_host != null || m_port != -1)
    {
      schemespec.append("//");
    }

    if (m_userinfo != null)
    {
      schemespec.append(m_userinfo);
      schemespec.append('@');
    }

    if (m_host != null)
    {
      schemespec.append(m_host);
    }

    if (m_port != -1)
    {
      schemespec.append(':');
      schemespec.append(m_port);
    }

    if (m_path != null)
    {
      schemespec.append((m_path));
    }

    if (m_queryString != null)
    {
      schemespec.append('?');
      schemespec.append(m_queryString);
    }

    if (m_fragment != null)
    {
      schemespec.append('#');
      schemespec.append(m_fragment);
    }

    return schemespec.toString();
  }

  /**
   * Get the userinfo for this URI.
   *
   * @return the userinfo for this URI (null if not specified).
   */
  public String getUserinfo()
  {
    return m_userinfo;
  }

  /**
   * Get the host for this URI.
   *
   * @return the host for this URI (null if not specified).
   */
  public String getHost()
  {
    return m_host;
  }

  /**
   * Get the port for this URI.
   *
   * @return the port for this URI (-1 if not specified).
   */
  public int getPort()
  {
    return m_port;
  }

  /**
   * Get the path for this URI (optionally with the query string and
   * fragment).
   *
   * @param p_includeQueryString if true (and query string is not null),
   *                             then a "?" followed by the query string
   *                             will be appended
   * @param p_includeFragment if true (and fragment is not null),
   *                             then a "#" followed by the fragment
   *                             will be appended
   *
   * @return the path for this URI possibly including the query string
   *         and fragment
   */
  public String getPath(boolean p_includeQueryString,
                        boolean p_includeFragment)
  {

    StringBuffer pathString = new StringBuffer(m_path);

    if (p_includeQueryString && m_queryString != null)
    {
      pathString.append('?');
      pathString.append(m_queryString);
    }

    if (p_includeFragment && m_fragment != null)
    {
      pathString.append('#');
      pathString.append(m_fragment);
    }

    return pathString.toString();
  }

  /**
   * Get the path for this URI. Note that the value returned is the path
   * only and does not include the query string or fragment.
   *
   * @return the path for this URI.
   */
  public String getPath()
  {
    return m_path;
  }

  /**
   * Get the query string for this URI.
   *
   * @return the query string for this URI. Null is returned if there
   *         was no "?" in the URI spec, empty string if there was a
   *         "?" but no query string following it.
   */
  public String getQueryString()
  {
    return m_queryString;
  }

  /**
   * Get the fragment for this URI.
   *
   * @return the fragment for this URI. Null is returned if there
   *         was no "#" in the URI spec, empty string if there was a
   *         "#" but no fragment following it.
   */
  public String getFragment()
  {
    return m_fragment;
  }

  /**
   * Set the scheme for this URI. The scheme is converted to lowercase
   * before it is set.
   *
   * @param p_scheme the scheme for this URI (cannot be null)
   *
   * @throws MalformedURIException if p_scheme is not a conformant
   *                                  scheme name
   */
  public void setScheme(String p_scheme) throws MalformedURIException
  {

    if (p_scheme == null)
    {
      throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_FROM_NULL_STRING, null)); //"Cannot set scheme from null string!");
    }

    if (!isConformantSchemeName(p_scheme))
    {
      throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_NOT_CONFORMANT, null)); //"The scheme is not conformant.");
    }

    m_scheme = p_scheme.toLowerCase();
  }

  /**
   * Set the userinfo for this URI. If a non-null value is passed in and
   * the host value is null, then an exception is thrown.
   *
   * @param p_userinfo the userinfo for this URI
   *
   * @throws MalformedURIException if p_userinfo contains invalid
   *                                  characters
   */
  public void setUserinfo(String p_userinfo) throws MalformedURIException
  {

    if (p_userinfo == null)
    {
      m_userinfo = null;
    }
    else
    {
      if (m_host == null)
      {
        throw new MalformedURIException(
          "Userinfo cannot be set when host is null!");
      }

      // userinfo can contain alphanumerics, mark characters, escaped
      // and ';',':','&','=','+','$',','
      int index = 0;
      int end = p_userinfo.length();
      char testChar = '\0';

      while (index < end)
      {
        testChar = p_userinfo.charAt(index);

        if (testChar == '%')
        {
          if (index + 2 >= end ||!isHex(p_userinfo.charAt(index + 1))
                  ||!isHex(p_userinfo.charAt(index + 2)))
          {
            throw new MalformedURIException(
              "Userinfo contains invalid escape sequence!");
          }
        }
        else if (!isUnreservedCharacter(testChar)
                 && USERINFO_CHARACTERS.indexOf(testChar) == -1)
        {
          throw new MalformedURIException(
            "Userinfo contains invalid character:" + testChar);
        }

        index++;
      }
    }

    m_userinfo = p_userinfo;
  }

  /**
   * Set the host for this URI. If null is passed in, the userinfo
   * field is also set to null and the port is set to -1.
   *
   * @param p_host the host for this URI
   *
   * @throws MalformedURIException if p_host is not a valid IP
   *                                  address or DNS hostname.
   */
  public void setHost(String p_host) throws MalformedURIException
  {

    if (p_host == null || p_host.trim().length() == 0)
    {
      m_host = p_host;
      m_userinfo = null;
      m_port = -1;
    }
    else if (!isWellFormedAddress(p_host))
    {
      throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_HOST_ADDRESS_NOT_WELLFORMED, null)); //"Host is not a well formed address!");
    }

    m_host = p_host;
  }

  /**
   * Set the port for this URI. -1 is used to indicate that the port is
   * not specified, otherwise valid port numbers are  between 0 and 65535.
   * If a valid port number is passed in and the host field is null,
   * an exception is thrown.
   *
   * @param p_port the port number for this URI
   *
   * @throws MalformedURIException if p_port is not -1 and not a
   *                                  valid port number
   */
  public void setPort(int p_port) throws MalformedURIException
  {

    if (p_port >= 0 && p_port <= 65535)
    {
      if (m_host == null)
      {
        throw new MalformedURIException(
          XMLMessages.createXMLMessage(XMLErrorResources.ER_PORT_WHEN_HOST_NULL, null)); //"Port cannot be set when host is null!");
      }
    }
    else if (p_port != -1)
    {
      throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_INVALID_PORT, null)); //"Invalid port number!");
    }

    m_port = p_port;
  }

  /**
   * Set the path for this URI. If the supplied path is null, then the
   * query string and fragment are set to null as well. If the supplied
   * path includes a query string and/or fragment, these fields will be
   * parsed and set as well. Note that, for URIs following the "generic
   * URI" syntax, the path specified should start with a slash.
   * For URIs that do not follow the generic URI syntax, this method
   * sets the scheme-specific part.
   *
   * @param p_path the path for this URI (may be null)
   *
   * @throws MalformedURIException if p_path contains invalid
   *                                  characters
   */
  public void setPath(String p_path) throws MalformedURIException
  {

    if (p_path == null)
    {
      m_path = null;
      m_queryString = null;
      m_fragment = null;
    }
    else
    {
      initializePath(p_path);
    }
  }

  /**
   * Append to the end of the path of this URI. If the current path does
   * not end in a slash and the path to be appended does not begin with
   * a slash, a slash will be appended to the current path before the
   * new segment is added. Also, if the current path ends in a slash
   * and the new segment begins with a slash, the extra slash will be
   * removed before the new segment is appended.
   *
   * @param p_addToPath the new segment to be added to the current path
   *
   * @throws MalformedURIException if p_addToPath contains syntax
   *                                  errors
   */
  public void appendPath(String p_addToPath) throws MalformedURIException
  {

    if (p_addToPath == null || p_addToPath.trim().length() == 0)
    {
      return;
    }

    if (!isURIString(p_addToPath))
    {
      throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_INVALID_CHAR, new Object[]{p_addToPath})); //"Path contains invalid character!");
    }

    if (m_path == null || m_path.trim().length() == 0)
    {
      if (p_addToPath.startsWith("/"))
      {
        m_path = p_addToPath;
      }
      else
      {
        m_path = "/" + p_addToPath;
      }
    }
    else if (m_path.endsWith("/"))
    {
      if (p_addToPath.startsWith("/"))
      {
        m_path = m_path.concat(p_addToPath.substring(1));
      }
      else
      {
        m_path = m_path.concat(p_addToPath);
      }
    }
    else
    {
      if (p_addToPath.startsWith("/"))
      {
        m_path = m_path.concat(p_addToPath);
      }
      else
      {
        m_path = m_path.concat("/" + p_addToPath);
      }
    }
  }

  /**
   * Set the query string for this URI. A non-null value is valid only
   * if this is an URI conforming to the generic URI syntax and
   * the path value is not null.