jaxws/src/java.xml.soap/share/classes/com/sun/xml/internal/messaging/saaj/util/JaxmURI.java
changeset 28977 d7609b65606b
parent 28976 8c912c147654
parent 28344 722378bc599e
child 28978 8431abc709c0
equal deleted inserted replaced
28976:8c912c147654 28977:d7609b65606b
     1 /*
       
     2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
       
     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       
     4  *
       
     5  * This code is free software; you can redistribute it and/or modify it
       
     6  * under the terms of the GNU General Public License version 2 only, as
       
     7  * published by the Free Software Foundation.  Oracle designates this
       
     8  * particular file as subject to the "Classpath" exception as provided
       
     9  * by Oracle in the LICENSE file that accompanied this code.
       
    10  *
       
    11  * This code is distributed in the hope that it will be useful, but WITHOUT
       
    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       
    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       
    14  * version 2 for more details (a copy is included in the LICENSE file that
       
    15  * accompanied this code).
       
    16  *
       
    17  * You should have received a copy of the GNU General Public License version
       
    18  * 2 along with this work; if not, write to the Free Software Foundation,
       
    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
       
    20  *
       
    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
       
    22  * or visit www.oracle.com if you need additional information or have any
       
    23  * questions.
       
    24  */
       
    25 
       
    26 package com.sun.xml.internal.messaging.saaj.util;
       
    27 
       
    28 // Imported from: org.apache.xerces.util
       
    29 // Needed to work around differences in JDK1.2 and 1.3 and deal with userInfo
       
    30 
       
    31 import java.io.IOException;
       
    32 import java.io.Serializable;
       
    33 
       
    34 
       
    35 /**********************************************************************
       
    36 * A class to represent a Uniform Resource Identifier (URI). This class
       
    37 * is designed to handle the parsing of URIs and provide access to
       
    38 * the various components (scheme, host, port, userinfo, path, query
       
    39 * string and fragment) that may constitute a URI.
       
    40 * <p>
       
    41 * Parsing of a URI specification is done according to the URI
       
    42 * syntax described in RFC 2396
       
    43 * <http://www.ietf.org/rfc/rfc2396.txt?number=2396>. Every URI consists
       
    44 * of a scheme, followed by a colon (':'), followed by a scheme-specific
       
    45 * part. For URIs that follow the "generic URI" syntax, the scheme-
       
    46 * specific part begins with two slashes ("//") and may be followed
       
    47 * by an authority segment (comprised of user information, host, and
       
    48 * port), path segment, query segment and fragment. Note that RFC 2396
       
    49 * no longer specifies the use of the parameters segment and excludes
       
    50 * the "user:password" syntax as part of the authority segment. If
       
    51 * "user:password" appears in a URI, the entire user/password string
       
    52 * is stored as userinfo.
       
    53 * <p>
       
    54 * For URIs that do not follow the "generic URI" syntax (e.g. mailto),
       
    55 * the entire scheme-specific part is treated as the "path" portion
       
    56 * of the URI.
       
    57 * <p>
       
    58 * Note that, unlike the java.net.URL class, this class does not provide
       
    59 * any built-in network access functionality nor does it provide any
       
    60 * scheme-specific functionality (for example, it does not know a
       
    61 * default port for a specific scheme). Rather, it only knows the
       
    62 * grammar and basic set of operations that can be applied to a URI.
       
    63 *
       
    64 * @version
       
    65 *
       
    66 **********************************************************************/
       
    67  public class JaxmURI implements Serializable {
       
    68 
       
    69   /*******************************************************************
       
    70   * MalformedURIExceptions are thrown in the process of building a URI
       
    71   * or setting fields on a URI when an operation would result in an
       
    72   * invalid URI specification.
       
    73   *
       
    74   ********************************************************************/
       
    75   public static class MalformedURIException extends IOException {
       
    76 
       
    77    /******************************************************************
       
    78     * Constructs a <code>MalformedURIException</code> with no specified
       
    79     * detail message.
       
    80     ******************************************************************/
       
    81     public MalformedURIException() {
       
    82       super();
       
    83     }
       
    84 
       
    85     /*****************************************************************
       
    86     * Constructs a <code>MalformedURIException</code> with the
       
    87     * specified detail message.
       
    88     *
       
    89     * @param p_msg the detail message.
       
    90     ******************************************************************/
       
    91     public MalformedURIException(String p_msg) {
       
    92       super(p_msg);
       
    93     }
       
    94   }
       
    95 
       
    96   /** reserved characters */
       
    97   private static final String RESERVED_CHARACTERS = ";/?:@&=+$,";
       
    98 
       
    99   /** URI punctuation mark characters - these, combined with
       
   100       alphanumerics, constitute the "unreserved" characters */
       
   101   private static final String MARK_CHARACTERS = "-_.!~*'() ";
       
   102 
       
   103   /** scheme can be composed of alphanumerics and these characters */
       
   104   private static final String SCHEME_CHARACTERS = "+-.";
       
   105 
       
   106   /** userinfo can be composed of unreserved, escaped and these
       
   107       characters */
       
   108   private static final String USERINFO_CHARACTERS = ";:&=+$,";
       
   109 
       
   110   /** Stores the scheme (usually the protocol) for this URI. */
       
   111   private String m_scheme = null;
       
   112 
       
   113   /** If specified, stores the userinfo for this URI; otherwise null */
       
   114   private String m_userinfo = null;
       
   115 
       
   116   /** If specified, stores the host for this URI; otherwise null */
       
   117   private String m_host = null;
       
   118 
       
   119   /** If specified, stores the port for this URI; otherwise -1 */
       
   120   private int m_port = -1;
       
   121 
       
   122   /** If specified, stores the path for this URI; otherwise null */
       
   123   private String m_path = null;
       
   124 
       
   125   /** If specified, stores the query string for this URI; otherwise
       
   126       null.  */
       
   127   private String m_queryString = null;
       
   128 
       
   129   /** If specified, stores the fragment for this URI; otherwise null */
       
   130   private String m_fragment = null;
       
   131 
       
   132   private static boolean DEBUG = false;
       
   133 
       
   134   /**
       
   135   * Construct a new and uninitialized URI.
       
   136   */
       
   137   public JaxmURI() {
       
   138   }
       
   139 
       
   140  /**
       
   141   * Construct a new URI from another URI. All fields for this URI are
       
   142   * set equal to the fields of the URI passed in.
       
   143   *
       
   144   * @param p_other the URI to copy (cannot be null)
       
   145   */
       
   146   public JaxmURI(JaxmURI p_other) {
       
   147     initialize(p_other);
       
   148   }
       
   149 
       
   150  /**
       
   151   * Construct a new URI from a URI specification string. If the
       
   152   * specification follows the "generic URI" syntax, (two slashes
       
   153   * following the first colon), the specification will be parsed
       
   154   * accordingly - setting the scheme, userinfo, host,port, path, query
       
   155   * string and fragment fields as necessary. If the specification does
       
   156   * not follow the "generic URI" syntax, the specification is parsed
       
   157   * into a scheme and scheme-specific part (stored as the path) only.
       
   158   *
       
   159   * @param p_uriSpec the URI specification string (cannot be null or
       
   160   *                  empty)
       
   161   *
       
   162   * @exception MalformedURIException if p_uriSpec violates any syntax
       
   163   *                                   rules
       
   164   */
       
   165   public JaxmURI(String p_uriSpec) throws MalformedURIException {
       
   166     this((JaxmURI)null, p_uriSpec);
       
   167   }
       
   168 
       
   169  /**
       
   170   * Construct a new URI from a base URI and a URI specification string.
       
   171   * The URI specification string may be a relative URI.
       
   172   *
       
   173   * @param p_base the base URI (cannot be null if p_uriSpec is null or
       
   174   *               empty)
       
   175   * @param p_uriSpec the URI specification string (cannot be null or
       
   176   *                  empty if p_base is null)
       
   177   *
       
   178   * @exception MalformedURIException if p_uriSpec violates any syntax
       
   179   *                                  rules
       
   180   */
       
   181   public JaxmURI(JaxmURI p_base, String p_uriSpec) throws MalformedURIException {
       
   182     initialize(p_base, p_uriSpec);
       
   183   }
       
   184 
       
   185  /**
       
   186   * Construct a new URI that does not follow the generic URI syntax.
       
   187   * Only the scheme and scheme-specific part (stored as the path) are
       
   188   * initialized.
       
   189   *
       
   190   * @param p_scheme the URI scheme (cannot be null or empty)
       
   191   * @param p_schemeSpecificPart the scheme-specific part (cannot be
       
   192   *                             null or empty)
       
   193   *
       
   194   * @exception MalformedURIException if p_scheme violates any
       
   195   *                                  syntax rules
       
   196   */
       
   197   public JaxmURI(String p_scheme, String p_schemeSpecificPart)
       
   198              throws MalformedURIException {
       
   199     if (p_scheme == null || p_scheme.trim().length() == 0) {
       
   200       throw new MalformedURIException(
       
   201             "Cannot construct URI with null/empty scheme!");
       
   202     }
       
   203     if (p_schemeSpecificPart == null ||
       
   204         p_schemeSpecificPart.trim().length() == 0) {
       
   205       throw new MalformedURIException(
       
   206           "Cannot construct URI with null/empty scheme-specific part!");
       
   207     }
       
   208     setScheme(p_scheme);
       
   209     setPath(p_schemeSpecificPart);
       
   210   }
       
   211 
       
   212  /**
       
   213   * Construct a new URI that follows the generic URI syntax from its
       
   214   * component parts. Each component is validated for syntax and some
       
   215   * basic semantic checks are performed as well.  See the individual
       
   216   * setter methods for specifics.
       
   217   *
       
   218   * @param p_scheme the URI scheme (cannot be null or empty)
       
   219   * @param p_host the hostname or IPv4 address for the URI
       
   220   * @param p_path the URI path - if the path contains '?' or '#',
       
   221   *               then the query string and/or fragment will be
       
   222   *               set from the path; however, if the query and
       
   223   *               fragment are specified both in the path and as
       
   224   *               separate parameters, an exception is thrown
       
   225   * @param p_queryString the URI query string (cannot be specified
       
   226   *                      if path is null)
       
   227   * @param p_fragment the URI fragment (cannot be specified if path
       
   228   *                   is null)
       
   229   *
       
   230   * @exception MalformedURIException if any of the parameters violates
       
   231   *                                  syntax rules or semantic rules
       
   232   */
       
   233   public JaxmURI(String p_scheme, String p_host, String p_path,
       
   234              String p_queryString, String p_fragment)
       
   235          throws MalformedURIException {
       
   236     this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment);
       
   237   }
       
   238 
       
   239  /**
       
   240   * Construct a new URI that follows the generic URI syntax from its
       
   241   * component parts. Each component is validated for syntax and some
       
   242   * basic semantic checks are performed as well.  See the individual
       
   243   * setter methods for specifics.
       
   244   *
       
   245   * @param p_scheme the URI scheme (cannot be null or empty)
       
   246   * @param p_userinfo the URI userinfo (cannot be specified if host
       
   247   *                   is null)
       
   248   * @param p_host the hostname or IPv4 address for the URI
       
   249   * @param p_port the URI port (may be -1 for "unspecified"; cannot
       
   250   *               be specified if host is null)
       
   251   * @param p_path the URI path - if the path contains '?' or '#',
       
   252   *               then the query string and/or fragment will be
       
   253   *               set from the path; however, if the query and
       
   254   *               fragment are specified both in the path and as
       
   255   *               separate parameters, an exception is thrown
       
   256   * @param p_queryString the URI query string (cannot be specified
       
   257   *                      if path is null)
       
   258   * @param p_fragment the URI fragment (cannot be specified if path
       
   259   *                   is null)
       
   260   *
       
   261   * @exception MalformedURIException if any of the parameters violates
       
   262   *                                  syntax rules or semantic rules
       
   263   */
       
   264   public JaxmURI(String p_scheme, String p_userinfo,
       
   265              String p_host, int p_port, String p_path,
       
   266              String p_queryString, String p_fragment)
       
   267          throws MalformedURIException {
       
   268     if (p_scheme == null || p_scheme.trim().length() == 0) {
       
   269       throw new MalformedURIException("Scheme is required!");
       
   270     }
       
   271 
       
   272     if (p_host == null) {
       
   273       if (p_userinfo != null) {
       
   274         throw new MalformedURIException(
       
   275              "Userinfo may not be specified if host is not specified!");
       
   276       }
       
   277       if (p_port != -1) {
       
   278         throw new MalformedURIException(
       
   279              "Port may not be specified if host is not specified!");
       
   280       }
       
   281     }
       
   282 
       
   283     if (p_path != null) {
       
   284       if (p_path.indexOf('?') != -1 && p_queryString != null) {
       
   285         throw new MalformedURIException(
       
   286           "Query string cannot be specified in path and query string!");
       
   287       }
       
   288 
       
   289       if (p_path.indexOf('#') != -1 && p_fragment != null) {
       
   290         throw new MalformedURIException(
       
   291           "Fragment cannot be specified in both the path and fragment!");
       
   292       }
       
   293     }
       
   294 
       
   295     setScheme(p_scheme);
       
   296     setHost(p_host);
       
   297     setPort(p_port);
       
   298     setUserinfo(p_userinfo);
       
   299     setPath(p_path);
       
   300     setQueryString(p_queryString);
       
   301     setFragment(p_fragment);
       
   302   }
       
   303 
       
   304  /**
       
   305   * Initialize all fields of this URI from another URI.
       
   306   *
       
   307   * @param p_other the URI to copy (cannot be null)
       
   308   */
       
   309   private void initialize(JaxmURI p_other) {
       
   310     m_scheme = p_other.getScheme();
       
   311     m_userinfo = p_other.getUserinfo();
       
   312     m_host = p_other.getHost();
       
   313     m_port = p_other.getPort();
       
   314     m_path = p_other.getPath();
       
   315     m_queryString = p_other.getQueryString();
       
   316     m_fragment = p_other.getFragment();
       
   317   }
       
   318 
       
   319  /**
       
   320   * Initializes this URI from a base URI and a URI specification string.
       
   321   * See RFC 2396 Section 4 and Appendix B for specifications on parsing
       
   322   * the URI and Section 5 for specifications on resolving relative URIs
       
   323   * and relative paths.
       
   324   *
       
   325   * @param p_base the base URI (may be null if p_uriSpec is an absolute
       
   326   *               URI)
       
   327   * @param p_uriSpec the URI spec string which may be an absolute or
       
   328   *                  relative URI (can only be null/empty if p_base
       
   329   *                  is not null)
       
   330   *
       
   331   * @exception MalformedURIException if p_base is null and p_uriSpec
       
   332   *                                  is not an absolute URI or if
       
   333   *                                  p_uriSpec violates syntax rules
       
   334   */
       
   335   private void initialize(JaxmURI p_base, String p_uriSpec)
       
   336                          throws MalformedURIException {
       
   337     if (p_base == null &&
       
   338         (p_uriSpec == null || p_uriSpec.trim().length() == 0)) {
       
   339       throw new MalformedURIException(
       
   340                   "Cannot initialize URI with empty parameters.");
       
   341       }
       
   342 
       
   343     // just make a copy of the base if spec is empty
       
   344     if (p_uriSpec == null || p_uriSpec.trim().length() == 0) {
       
   345       initialize(p_base);
       
   346       return;
       
   347     }
       
   348 
       
   349     String uriSpec = p_uriSpec.trim();
       
   350     int uriSpecLen = uriSpec.length();
       
   351     int index = 0;
       
   352 
       
   353     // Check for scheme, which must be before `/'. Also handle names with
       
   354     // DOS drive letters ('D:'), so 1-character schemes are not allowed.
       
   355     int colonIdx = uriSpec.indexOf(':');
       
   356     int slashIdx = uriSpec.indexOf('/');
       
   357     if ((colonIdx < 2) || (colonIdx > slashIdx && slashIdx != -1)) {
       
   358       int fragmentIdx = uriSpec.indexOf('#');
       
   359       // A standalone base is a valid URI according to spec
       
   360       if (p_base == null && fragmentIdx != 0 ) {
       
   361         throw new MalformedURIException("No scheme found in URI.");
       
   362       }
       
   363     }
       
   364     else {
       
   365       initializeScheme(uriSpec);
       
   366       index = m_scheme.length()+1;
       
   367     }
       
   368 
       
   369     // two slashes means generic URI syntax, so we get the authority
       
   370     if (((index+1) < uriSpecLen) &&
       
   371         (uriSpec.substring(index).startsWith("//"))) {
       
   372       index += 2;
       
   373       int startPos = index;
       
   374 
       
   375       // get authority - everything up to path, query or fragment
       
   376       char testChar = '\0';
       
   377       while (index < uriSpecLen) {
       
   378         testChar = uriSpec.charAt(index);
       
   379         if (testChar == '/' || testChar == '?' || testChar == '#') {
       
   380           break;
       
   381         }
       
   382         index++;
       
   383       }
       
   384 
       
   385       // if we found authority, parse it out, otherwise we set the
       
   386       // host to empty string
       
   387       if (index > startPos) {
       
   388         initializeAuthority(uriSpec.substring(startPos, index));
       
   389       }
       
   390       else {
       
   391         m_host = "";
       
   392       }
       
   393     }
       
   394 
       
   395     initializePath(uriSpec.substring(index));
       
   396 
       
   397     // Resolve relative URI to base URI - see RFC 2396 Section 5.2
       
   398     // In some cases, it might make more sense to throw an exception
       
   399     // (when scheme is specified is the string spec and the base URI
       
   400     // is also specified, for example), but we're just following the
       
   401     // RFC specifications
       
   402     if (p_base != null) {
       
   403 
       
   404       // check to see if this is the current doc - RFC 2396 5.2 #2
       
   405       // note that this is slightly different from the RFC spec in that
       
   406       // we don't include the check for query string being null
       
   407       // - this handles cases where the urispec is just a query
       
   408       // string or a fragment (e.g. "?y" or "#s") -
       
   409       // see <http://www.ics.uci.edu/~fielding/url/test1.html> which
       
   410       // identified this as a bug in the RFC
       
   411       if (m_path.length() == 0 && m_scheme == null &&
       
   412           m_host == null) {
       
   413         m_scheme = p_base.getScheme();
       
   414         m_userinfo = p_base.getUserinfo();
       
   415         m_host = p_base.getHost();
       
   416         m_port = p_base.getPort();
       
   417         m_path = p_base.getPath();
       
   418 
       
   419         if (m_queryString == null) {
       
   420           m_queryString = p_base.getQueryString();
       
   421         }
       
   422         return;
       
   423       }
       
   424 
       
   425       // check for scheme - RFC 2396 5.2 #3
       
   426       // if we found a scheme, it means absolute URI, so we're done
       
   427       if (m_scheme == null) {
       
   428         m_scheme = p_base.getScheme();
       
   429       }
       
   430       else {
       
   431         return;
       
   432       }
       
   433 
       
   434       // check for authority - RFC 2396 5.2 #4
       
   435       // if we found a host, then we've got a network path, so we're done
       
   436       if (m_host == null) {
       
   437         m_userinfo = p_base.getUserinfo();
       
   438         m_host = p_base.getHost();
       
   439         m_port = p_base.getPort();
       
   440       }
       
   441       else {
       
   442         return;
       
   443       }
       
   444 
       
   445       // check for absolute path - RFC 2396 5.2 #5
       
   446       if (m_path.length() > 0 &&
       
   447           m_path.startsWith("/")) {
       
   448         return;
       
   449       }
       
   450 
       
   451       // if we get to this point, we need to resolve relative path
       
   452       // RFC 2396 5.2 #6
       
   453       String path = "";
       
   454       String basePath = p_base.getPath();
       
   455 
       
   456       // 6a - get all but the last segment of the base URI path
       
   457       if (basePath != null) {
       
   458         int lastSlash = basePath.lastIndexOf('/');
       
   459         if (lastSlash != -1) {
       
   460           path = basePath.substring(0, lastSlash+1);
       
   461         }
       
   462       }
       
   463 
       
   464       // 6b - append the relative URI path
       
   465       path = path.concat(m_path);
       
   466 
       
   467       // 6c - remove all "./" where "." is a complete path segment
       
   468       index = -1;
       
   469       while ((index = path.indexOf("/./")) != -1) {
       
   470         path = path.substring(0, index+1).concat(path.substring(index+3));
       
   471       }
       
   472 
       
   473       // 6d - remove "." if path ends with "." as a complete path segment
       
   474       if (path.endsWith("/.")) {
       
   475         path = path.substring(0, path.length()-1);
       
   476       }
       
   477 
       
   478       // 6e - remove all "<segment>/../" where "<segment>" is a complete
       
   479       // path segment not equal to ".."
       
   480       index = 1;
       
   481       int segIndex = -1;
       
   482       String tempString = null;
       
   483 
       
   484       while ((index = path.indexOf("/../", index)) > 0) {
       
   485         tempString = path.substring(0, path.indexOf("/../"));
       
   486         segIndex = tempString.lastIndexOf('/');
       
   487         if (segIndex != -1) {
       
   488           if (!tempString.substring(segIndex++).equals("..")) {
       
   489             path = path.substring(0, segIndex).concat(path.substring(index+4));
       
   490           }
       
   491           else
       
   492             index += 4;
       
   493         }
       
   494         else
       
   495           index += 4;
       
   496       }
       
   497 
       
   498       // 6f - remove ending "<segment>/.." where "<segment>" is a
       
   499       // complete path segment
       
   500       if (path.endsWith("/..")) {
       
   501         tempString = path.substring(0, path.length()-3);
       
   502         segIndex = tempString.lastIndexOf('/');
       
   503         if (segIndex != -1) {
       
   504           path = path.substring(0, segIndex+1);
       
   505         }
       
   506       }
       
   507       m_path = path;
       
   508     }
       
   509   }
       
   510 
       
   511  /**
       
   512   * Initialize the scheme for this URI from a URI string spec.
       
   513   *
       
   514   * @param p_uriSpec the URI specification (cannot be null)
       
   515   *
       
   516   * @exception MalformedURIException if URI does not have a conformant
       
   517   *                                  scheme
       
   518   */
       
   519   private void initializeScheme(String p_uriSpec)
       
   520                  throws MalformedURIException {
       
   521     int uriSpecLen = p_uriSpec.length();
       
   522     int index = 0;
       
   523     String scheme = null;
       
   524     char testChar = '\0';
       
   525 
       
   526     while (index < uriSpecLen) {
       
   527       testChar = p_uriSpec.charAt(index);
       
   528       if (testChar == ':' || testChar == '/' ||
       
   529           testChar == '?' || testChar == '#') {
       
   530         break;
       
   531       }
       
   532       index++;
       
   533     }
       
   534     scheme = p_uriSpec.substring(0, index);
       
   535 
       
   536     if (scheme.length() == 0) {
       
   537       throw new MalformedURIException("No scheme found in URI.");
       
   538     }
       
   539     else {
       
   540       setScheme(scheme);
       
   541     }
       
   542   }
       
   543 
       
   544  /**
       
   545   * Initialize the authority (userinfo, host and port) for this
       
   546   * URI from a URI string spec.
       
   547   *
       
   548   * @param p_uriSpec the URI specification (cannot be null)
       
   549   *
       
   550   * @exception MalformedURIException if p_uriSpec violates syntax rules
       
   551   */
       
   552   private void initializeAuthority(String p_uriSpec)
       
   553                  throws MalformedURIException {
       
   554     int index = 0;
       
   555     int start = 0;
       
   556     int end = p_uriSpec.length();
       
   557     char testChar = '\0';
       
   558     String userinfo = null;
       
   559 
       
   560     // userinfo is everything up @
       
   561     if (p_uriSpec.indexOf('@', start) != -1) {
       
   562       while (index < end) {
       
   563         testChar = p_uriSpec.charAt(index);
       
   564         if (testChar == '@') {
       
   565           break;
       
   566         }
       
   567         index++;
       
   568       }
       
   569       userinfo = p_uriSpec.substring(start, index);
       
   570       index++;
       
   571     }
       
   572 
       
   573     // host is everything up to ':'
       
   574     String host = null;
       
   575     start = index;
       
   576     while (index < end) {
       
   577       testChar = p_uriSpec.charAt(index);
       
   578       if (testChar == ':') {
       
   579         break;
       
   580       }
       
   581       index++;
       
   582     }
       
   583     host = p_uriSpec.substring(start, index);
       
   584     int port = -1;
       
   585     if (host.length() > 0) {
       
   586       // port
       
   587       if (testChar == ':') {
       
   588         index++;
       
   589         start = index;
       
   590         while (index < end) {
       
   591           index++;
       
   592         }
       
   593         String portStr = p_uriSpec.substring(start, index);
       
   594         if (portStr.length() > 0) {
       
   595           for (int i = 0; i < portStr.length(); i++) {
       
   596             if (!isDigit(portStr.charAt(i))) {
       
   597               throw new MalformedURIException(
       
   598                    portStr +
       
   599                    " is invalid. Port should only contain digits!");
       
   600             }
       
   601           }
       
   602           try {
       
   603             port = Integer.parseInt(portStr);
       
   604           }
       
   605           catch (NumberFormatException nfe) {
       
   606             // can't happen
       
   607           }
       
   608         }
       
   609       }
       
   610     }
       
   611     setHost(host);
       
   612     setPort(port);
       
   613     setUserinfo(userinfo);
       
   614   }
       
   615 
       
   616  /**
       
   617   * Initialize the path for this URI from a URI string spec.
       
   618   *
       
   619   * @param p_uriSpec the URI specification (cannot be null)
       
   620   *
       
   621   * @exception MalformedURIException if p_uriSpec violates syntax rules
       
   622   */
       
   623   private void initializePath(String p_uriSpec)
       
   624                  throws MalformedURIException {
       
   625     if (p_uriSpec == null) {
       
   626       throw new MalformedURIException(
       
   627                 "Cannot initialize path from null string!");
       
   628     }
       
   629 
       
   630     int index = 0;
       
   631     int start = 0;
       
   632     int end = p_uriSpec.length();
       
   633     char testChar = '\0';
       
   634 
       
   635     // path - everything up to query string or fragment
       
   636     while (index < end) {
       
   637       testChar = p_uriSpec.charAt(index);
       
   638       if (testChar == '?' || testChar == '#') {
       
   639         break;
       
   640       }
       
   641       // check for valid escape sequence
       
   642       if (testChar == '%') {
       
   643          if (index+2 >= end ||
       
   644             !isHex(p_uriSpec.charAt(index+1)) ||
       
   645             !isHex(p_uriSpec.charAt(index+2))) {
       
   646           throw new MalformedURIException(
       
   647                 "Path contains invalid escape sequence!");
       
   648          }
       
   649       }
       
   650       else if (!isReservedCharacter(testChar) &&
       
   651                !isUnreservedCharacter(testChar)) {
       
   652         throw new MalformedURIException(
       
   653                   "Path contains invalid character: " + testChar);
       
   654       }
       
   655       index++;
       
   656     }
       
   657     m_path = p_uriSpec.substring(start, index);
       
   658 
       
   659     // query - starts with ? and up to fragment or end
       
   660     if (testChar == '?') {
       
   661       index++;
       
   662       start = index;
       
   663       while (index < end) {
       
   664         testChar = p_uriSpec.charAt(index);
       
   665         if (testChar == '#') {
       
   666           break;
       
   667         }
       
   668         if (testChar == '%') {
       
   669            if (index+2 >= end ||
       
   670               !isHex(p_uriSpec.charAt(index+1)) ||
       
   671               !isHex(p_uriSpec.charAt(index+2))) {
       
   672             throw new MalformedURIException(
       
   673                     "Query string contains invalid escape sequence!");
       
   674            }
       
   675         }
       
   676         else if (!isReservedCharacter(testChar) &&
       
   677                  !isUnreservedCharacter(testChar)) {
       
   678           throw new MalformedURIException(
       
   679                 "Query string contains invalid character:" + testChar);
       
   680         }
       
   681         index++;
       
   682       }
       
   683       m_queryString = p_uriSpec.substring(start, index);
       
   684     }
       
   685 
       
   686     // fragment - starts with #
       
   687     if (testChar == '#') {
       
   688       index++;
       
   689       start = index;
       
   690       while (index < end) {
       
   691         testChar = p_uriSpec.charAt(index);
       
   692 
       
   693         if (testChar == '%') {
       
   694            if (index+2 >= end ||
       
   695               !isHex(p_uriSpec.charAt(index+1)) ||
       
   696               !isHex(p_uriSpec.charAt(index+2))) {
       
   697             throw new MalformedURIException(
       
   698                     "Fragment contains invalid escape sequence!");
       
   699            }
       
   700         }
       
   701         else if (!isReservedCharacter(testChar) &&
       
   702                  !isUnreservedCharacter(testChar)) {
       
   703           throw new MalformedURIException(
       
   704                 "Fragment contains invalid character:"+testChar);
       
   705         }
       
   706         index++;
       
   707       }
       
   708       m_fragment = p_uriSpec.substring(start, index);
       
   709     }
       
   710   }
       
   711 
       
   712  /**
       
   713   * Get the scheme for this URI.
       
   714   *
       
   715   * @return the scheme for this URI
       
   716   */
       
   717   public String getScheme() {
       
   718     return m_scheme;
       
   719   }
       
   720 
       
   721  /**
       
   722   * Get the scheme-specific part for this URI (everything following the
       
   723   * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
       
   724   *
       
   725   * @return the scheme-specific part for this URI
       
   726   */
       
   727   public String getSchemeSpecificPart() {
       
   728     StringBuffer schemespec = new StringBuffer();
       
   729 
       
   730     if (m_userinfo != null || m_host != null || m_port != -1) {
       
   731       schemespec.append("//");
       
   732     }
       
   733 
       
   734     if (m_userinfo != null) {
       
   735       schemespec.append(m_userinfo);
       
   736       schemespec.append('@');
       
   737     }
       
   738 
       
   739     if (m_host != null) {
       
   740       schemespec.append(m_host);
       
   741     }
       
   742 
       
   743     if (m_port != -1) {
       
   744       schemespec.append(':');
       
   745       schemespec.append(m_port);
       
   746     }
       
   747 
       
   748     if (m_path != null) {
       
   749       schemespec.append((m_path));
       
   750     }
       
   751 
       
   752     if (m_queryString != null) {
       
   753       schemespec.append('?');
       
   754       schemespec.append(m_queryString);
       
   755     }
       
   756 
       
   757     if (m_fragment != null) {
       
   758       schemespec.append('#');
       
   759       schemespec.append(m_fragment);
       
   760     }
       
   761 
       
   762     return schemespec.toString();
       
   763   }
       
   764 
       
   765  /**
       
   766   * Get the userinfo for this URI.
       
   767   *
       
   768   * @return the userinfo for this URI (null if not specified).
       
   769   */
       
   770   public String getUserinfo() {
       
   771     return m_userinfo;
       
   772   }
       
   773 
       
   774   /**
       
   775   * Get the host for this URI.
       
   776   *
       
   777   * @return the host for this URI (null if not specified).
       
   778   */
       
   779   public String getHost() {
       
   780     return m_host;
       
   781   }
       
   782 
       
   783  /**
       
   784   * Get the port for this URI.
       
   785   *
       
   786   * @return the port for this URI (-1 if not specified).
       
   787   */
       
   788   public int getPort() {
       
   789     return m_port;
       
   790   }
       
   791 
       
   792  /**
       
   793   * Get the path for this URI (optionally with the query string and
       
   794   * fragment).
       
   795   *
       
   796   * @param p_includeQueryString if true (and query string is not null),
       
   797   *                             then a "?" followed by the query string
       
   798   *                             will be appended
       
   799   * @param p_includeFragment if true (and fragment is not null),
       
   800   *                             then a "#" followed by the fragment
       
   801   *                             will be appended
       
   802   *
       
   803   * @return the path for this URI possibly including the query string
       
   804   *         and fragment
       
   805   */
       
   806   public String getPath(boolean p_includeQueryString,
       
   807                         boolean p_includeFragment) {
       
   808     StringBuffer pathString = new StringBuffer(m_path);
       
   809 
       
   810     if (p_includeQueryString && m_queryString != null) {
       
   811       pathString.append('?');
       
   812       pathString.append(m_queryString);
       
   813     }
       
   814 
       
   815     if (p_includeFragment && m_fragment != null) {
       
   816       pathString.append('#');
       
   817       pathString.append(m_fragment);
       
   818     }
       
   819     return pathString.toString();
       
   820   }
       
   821 
       
   822  /**
       
   823   * Get the path for this URI. Note that the value returned is the path
       
   824   * only and does not include the query string or fragment.
       
   825   *
       
   826   * @return the path for this URI.
       
   827   */
       
   828   public String getPath() {
       
   829     return m_path;
       
   830   }
       
   831 
       
   832  /**
       
   833   * Get the query string for this URI.
       
   834   *
       
   835   * @return the query string for this URI. Null is returned if there
       
   836   *         was no "?" in the URI spec, empty string if there was a
       
   837   *         "?" but no query string following it.
       
   838   */
       
   839   public String getQueryString() {
       
   840     return m_queryString;
       
   841   }
       
   842 
       
   843  /**
       
   844   * Get the fragment for this URI.
       
   845   *
       
   846   * @return the fragment for this URI. Null is returned if there
       
   847   *         was no "#" in the URI spec, empty string if there was a
       
   848   *         "#" but no fragment following it.
       
   849   */
       
   850   public String getFragment() {
       
   851     return m_fragment;
       
   852   }
       
   853 
       
   854  /**
       
   855   * Set the scheme for this URI. The scheme is converted to lowercase
       
   856   * before it is set.
       
   857   *
       
   858   * @param p_scheme the scheme for this URI (cannot be null)
       
   859   *
       
   860   * @exception MalformedURIException if p_scheme is not a conformant
       
   861   *                                  scheme name
       
   862   */
       
   863   public void setScheme(String p_scheme) throws MalformedURIException {
       
   864     if (p_scheme == null) {
       
   865       throw new MalformedURIException(
       
   866                 "Cannot set scheme from null string!");
       
   867     }
       
   868     if (!isConformantSchemeName(p_scheme)) {
       
   869       throw new MalformedURIException("The scheme is not conformant.");
       
   870     }
       
   871 
       
   872     m_scheme = p_scheme.toLowerCase();
       
   873   }
       
   874 
       
   875  /**
       
   876   * Set the userinfo for this URI. If a non-null value is passed in and
       
   877   * the host value is null, then an exception is thrown.
       
   878   *
       
   879   * @param p_userinfo the userinfo for this URI
       
   880   *
       
   881   * @exception MalformedURIException if p_userinfo contains invalid
       
   882   *                                  characters
       
   883   */
       
   884   public void setUserinfo(String p_userinfo) throws MalformedURIException {
       
   885     if (p_userinfo == null) {
       
   886       m_userinfo = null;
       
   887     }
       
   888     else {
       
   889       if (m_host == null) {
       
   890         throw new MalformedURIException(
       
   891                      "Userinfo cannot be set when host is null!");
       
   892       }
       
   893 
       
   894       // userinfo can contain alphanumerics, mark characters, escaped
       
   895       // and ';',':','&','=','+','$',','
       
   896       int index = 0;
       
   897       int end = p_userinfo.length();
       
   898       char testChar = '\0';
       
   899       while (index < end) {
       
   900         testChar = p_userinfo.charAt(index);
       
   901         if (testChar == '%') {
       
   902           if (index+2 >= end ||
       
   903               !isHex(p_userinfo.charAt(index+1)) ||
       
   904               !isHex(p_userinfo.charAt(index+2))) {
       
   905             throw new MalformedURIException(
       
   906                   "Userinfo contains invalid escape sequence!");
       
   907           }
       
   908         }
       
   909         else if (!isUnreservedCharacter(testChar) &&
       
   910                  USERINFO_CHARACTERS.indexOf(testChar) == -1) {
       
   911           throw new MalformedURIException(
       
   912                   "Userinfo contains invalid character:"+testChar);
       
   913         }
       
   914         index++;
       
   915       }
       
   916     }
       
   917     m_userinfo = p_userinfo;
       
   918   }
       
   919 
       
   920   /**
       
   921   * Set the host for this URI. If null is passed in, the userinfo
       
   922   * field is also set to null and the port is set to -1.
       
   923   *
       
   924   * @param p_host the host for this URI
       
   925   *
       
   926   * @exception MalformedURIException if p_host is not a valid IP
       
   927   *                                  address or DNS hostname.
       
   928   */
       
   929   public void setHost(String p_host) throws MalformedURIException {
       
   930     if (p_host == null || p_host.trim().length() == 0) {
       
   931       m_host = p_host;
       
   932       m_userinfo = null;
       
   933       m_port = -1;
       
   934     }
       
   935     else if (!isWellFormedAddress(p_host)) {
       
   936       throw new MalformedURIException("Host is not a well formed address!");
       
   937     }
       
   938     m_host = p_host;
       
   939   }
       
   940 
       
   941  /**
       
   942   * Set the port for this URI. -1 is used to indicate that the port is
       
   943   * not specified, otherwise valid port numbers are  between 0 and 65535.
       
   944   * If a valid port number is passed in and the host field is null,
       
   945   * an exception is thrown.
       
   946   *
       
   947   * @param p_port the port number for this URI
       
   948   *
       
   949   * @exception MalformedURIException if p_port is not -1 and not a
       
   950   *                                  valid port number
       
   951   */
       
   952   public void setPort(int p_port) throws MalformedURIException {
       
   953     if (p_port >= 0 && p_port <= 65535) {
       
   954       if (m_host == null) {
       
   955         throw new MalformedURIException(
       
   956                       "Port cannot be set when host is null!");
       
   957       }
       
   958     }
       
   959     else if (p_port != -1) {
       
   960       throw new MalformedURIException("Invalid port number!");
       
   961     }
       
   962     m_port = p_port;
       
   963   }
       
   964 
       
   965  /**
       
   966   * Set the path for this URI. If the supplied path is null, then the
       
   967   * query string and fragment are set to null as well. If the supplied
       
   968   * path includes a query string and/or fragment, these fields will be
       
   969   * parsed and set as well. Note that, for URIs following the "generic
       
   970   * URI" syntax, the path specified should start with a slash.
       
   971   * For URIs that do not follow the generic URI syntax, this method
       
   972   * sets the scheme-specific part.
       
   973   *
       
   974   * @param p_path the path for this URI (may be null)
       
   975   *
       
   976   * @exception MalformedURIException if p_path contains invalid
       
   977   *                                  characters
       
   978   */
       
   979   public void setPath(String p_path) throws MalformedURIException {
       
   980     if (p_path == null) {
       
   981       m_path = null;
       
   982       m_queryString = null;
       
   983       m_fragment = null;
       
   984     }
       
   985     else {
       
   986       initializePath(p_path);
       
   987     }
       
   988   }
       
   989 
       
   990  /**
       
   991   * Append to the end of the path of this URI. If the current path does
       
   992   * not end in a slash and the path to be appended does not begin with
       
   993   * a slash, a slash will be appended to the current path before the
       
   994   * new segment is added. Also, if the current path ends in a slash
       
   995   * and the new segment begins with a slash, the extra slash will be
       
   996   * removed before the new segment is appended.
       
   997   *
       
   998   * @param p_addToPath the new segment to be added to the current path
       
   999   *
       
  1000   * @exception MalformedURIException if p_addToPath contains syntax
       
  1001   *                                  errors
       
  1002   */
       
  1003   public void appendPath(String p_addToPath)
       
  1004                          throws MalformedURIException {
       
  1005     if (p_addToPath == null || p_addToPath.trim().length() == 0) {
       
  1006       return;
       
  1007     }
       
  1008 
       
  1009     if (!isURIString(p_addToPath)) {
       
  1010       throw new MalformedURIException(
       
  1011               "Path contains invalid character!");
       
  1012     }
       
  1013 
       
  1014     if (m_path == null || m_path.trim().length() == 0) {
       
  1015       if (p_addToPath.startsWith("/")) {
       
  1016         m_path = p_addToPath;
       
  1017       }
       
  1018       else {
       
  1019         m_path = "/" + p_addToPath;
       
  1020       }
       
  1021     }
       
  1022     else if (m_path.endsWith("/")) {
       
  1023       if (p_addToPath.startsWith("/")) {
       
  1024         m_path = m_path.concat(p_addToPath.substring(1));
       
  1025       }
       
  1026       else {
       
  1027         m_path = m_path.concat(p_addToPath);
       
  1028       }
       
  1029     }
       
  1030     else {
       
  1031       if (p_addToPath.startsWith("/")) {
       
  1032         m_path = m_path.concat(p_addToPath);
       
  1033       }
       
  1034       else {
       
  1035         m_path = m_path.concat("/" + p_addToPath);
       
  1036       }
       
  1037     }
       
  1038   }
       
  1039 
       
  1040  /**
       
  1041   * Set the query string for this URI. A non-null value is valid only
       
  1042   * if this is an URI conforming to the generic URI syntax and
       
  1043   * the path value is not null.
       
  1044   *
       
  1045   * @param p_queryString the query string for this URI
       
  1046   *
       
  1047   * @exception MalformedURIException if p_queryString is not null and this
       
  1048   *                                  URI does not conform to the generic
       
  1049   *                                  URI syntax or if the path is null
       
  1050   */
       
  1051   public void setQueryString(String p_queryString) throws MalformedURIException {
       
  1052     if (p_queryString == null) {
       
  1053       m_queryString = null;
       
  1054     }
       
  1055     else if (!isGenericURI()) {
       
  1056       throw new MalformedURIException(
       
  1057               "Query string can only be set for a generic URI!");
       
  1058     }
       
  1059     else if (getPath() == null) {
       
  1060       throw new MalformedURIException(
       
  1061               "Query string cannot be set when path is null!");
       
  1062     }
       
  1063     else if (!isURIString(p_queryString)) {
       
  1064       throw new MalformedURIException(
       
  1065               "Query string contains invalid character!");
       
  1066     }
       
  1067     else {
       
  1068       m_queryString = p_queryString;
       
  1069     }
       
  1070   }
       
  1071 
       
  1072  /**
       
  1073   * Set the fragment for this URI. A non-null value is valid only
       
  1074   * if this is a URI conforming to the generic URI syntax and
       
  1075   * the path value is not null.
       
  1076   *
       
  1077   * @param p_fragment the fragment for this URI
       
  1078   *
       
  1079   * @exception MalformedURIException if p_fragment is not null and this
       
  1080   *                                  URI does not conform to the generic
       
  1081   *                                  URI syntax or if the path is null
       
  1082   */
       
  1083   public void setFragment(String p_fragment) throws MalformedURIException {
       
  1084     if (p_fragment == null) {
       
  1085       m_fragment = null;
       
  1086     }
       
  1087     else if (!isGenericURI()) {
       
  1088       throw new MalformedURIException(
       
  1089          "Fragment can only be set for a generic URI!");
       
  1090     }
       
  1091     else if (getPath() == null) {
       
  1092       throw new MalformedURIException(
       
  1093               "Fragment cannot be set when path is null!");
       
  1094     }
       
  1095     else if (!isURIString(p_fragment)) {
       
  1096       throw new MalformedURIException(
       
  1097               "Fragment contains invalid character!");
       
  1098     }
       
  1099     else {
       
  1100       m_fragment = p_fragment;
       
  1101     }
       
  1102   }
       
  1103 
       
  1104  /**
       
  1105   * Determines if the passed-in Object is equivalent to this URI.
       
  1106   *
       
  1107   * @param p_test the Object to test for equality.
       
  1108   *
       
  1109   * @return true if p_test is a URI with all values equal to this
       
  1110   *         URI, false otherwise
       
  1111   */
       
  1112   public boolean equals(Object p_test) {
       
  1113     if (p_test instanceof JaxmURI) {
       
  1114       JaxmURI testURI = (JaxmURI) p_test;
       
  1115       if (((m_scheme == null && testURI.m_scheme == null) ||
       
  1116            (m_scheme != null && testURI.m_scheme != null &&
       
  1117             m_scheme.equals(testURI.m_scheme))) &&
       
  1118           ((m_userinfo == null && testURI.m_userinfo == null) ||
       
  1119            (m_userinfo != null && testURI.m_userinfo != null &&
       
  1120             m_userinfo.equals(testURI.m_userinfo))) &&
       
  1121           ((m_host == null && testURI.m_host == null) ||
       
  1122            (m_host != null && testURI.m_host != null &&
       
  1123             m_host.equals(testURI.m_host))) &&
       
  1124             m_port == testURI.m_port &&
       
  1125           ((m_path == null && testURI.m_path == null) ||
       
  1126            (m_path != null && testURI.m_path != null &&
       
  1127             m_path.equals(testURI.m_path))) &&
       
  1128           ((m_queryString == null && testURI.m_queryString == null) ||
       
  1129            (m_queryString != null && testURI.m_queryString != null &&
       
  1130             m_queryString.equals(testURI.m_queryString))) &&
       
  1131           ((m_fragment == null && testURI.m_fragment == null) ||
       
  1132            (m_fragment != null && testURI.m_fragment != null &&
       
  1133             m_fragment.equals(testURI.m_fragment)))) {
       
  1134         return true;
       
  1135       }
       
  1136     }
       
  1137     return false;
       
  1138   }
       
  1139 
       
  1140   public int hashCode() {
       
  1141           // No members safe to use, just default to a constant.
       
  1142           return 153214;
       
  1143   }
       
  1144 
       
  1145  /**
       
  1146   * Get the URI as a string specification. See RFC 2396 Section 5.2.
       
  1147   *
       
  1148   * @return the URI string specification
       
  1149   */
       
  1150   public String toString() {
       
  1151     StringBuffer uriSpecString = new StringBuffer();
       
  1152 
       
  1153     if (m_scheme != null) {
       
  1154       uriSpecString.append(m_scheme);
       
  1155       uriSpecString.append(':');
       
  1156     }
       
  1157     uriSpecString.append(getSchemeSpecificPart());
       
  1158     return uriSpecString.toString();
       
  1159   }
       
  1160 
       
  1161  /**
       
  1162   * Get the indicator as to whether this URI uses the "generic URI"
       
  1163   * syntax.
       
  1164   *
       
  1165   * @return true if this URI uses the "generic URI" syntax, false
       
  1166   *         otherwise
       
  1167   */
       
  1168   public boolean isGenericURI() {
       
  1169     // presence of the host (whether valid or empty) means
       
  1170     // double-slashes which means generic uri
       
  1171     return (m_host != null);
       
  1172   }
       
  1173 
       
  1174  /**
       
  1175   * Determine whether a scheme conforms to the rules for a scheme name.
       
  1176   * A scheme is conformant if it starts with an alphanumeric, and
       
  1177   * contains only alphanumerics, '+','-' and '.'.
       
  1178   *
       
  1179   * @return true if the scheme is conformant, false otherwise
       
  1180   */
       
  1181   public static boolean isConformantSchemeName(String p_scheme) {
       
  1182     if (p_scheme == null || p_scheme.trim().length() == 0) {
       
  1183       return false;
       
  1184     }
       
  1185 
       
  1186     if (!isAlpha(p_scheme.charAt(0))) {
       
  1187       return false;
       
  1188     }
       
  1189 
       
  1190     char testChar;
       
  1191     for (int i = 1; i < p_scheme.length(); i++) {
       
  1192       testChar = p_scheme.charAt(i);
       
  1193       if (!isAlphanum(testChar) &&
       
  1194           SCHEME_CHARACTERS.indexOf(testChar) == -1) {
       
  1195         return false;
       
  1196       }
       
  1197     }
       
  1198 
       
  1199     return true;
       
  1200   }
       
  1201 
       
  1202  /**
       
  1203   * Determine whether a string is syntactically capable of representing
       
  1204   * a valid IPv4 address or the domain name of a network host. A valid
       
  1205   * IPv4 address consists of four decimal digit groups separated by a
       
  1206   * '.'. A hostname consists of domain labels (each of which must
       
  1207   * begin and end with an alphanumeric but may contain '-') separated
       
  1208   & by a '.'. See RFC 2396 Section 3.2.2.
       
  1209   *
       
  1210   * @return true if the string is a syntactically valid IPv4 address
       
  1211   *              or hostname
       
  1212   */
       
  1213   public static boolean isWellFormedAddress(String p_address) {
       
  1214     if (p_address == null) {
       
  1215       return false;
       
  1216     }
       
  1217 
       
  1218     String address = p_address.trim();
       
  1219     int addrLength = address.length();
       
  1220     if (addrLength == 0 || addrLength > 255) {
       
  1221       return false;
       
  1222     }
       
  1223 
       
  1224     if (address.startsWith(".") || address.startsWith("-")) {
       
  1225       return false;
       
  1226     }
       
  1227 
       
  1228     // rightmost domain label starting with digit indicates IP address
       
  1229     // since top level domain label can only start with an alpha
       
  1230     // see RFC 2396 Section 3.2.2
       
  1231     int index = address.lastIndexOf('.');
       
  1232     if (address.endsWith(".")) {
       
  1233       index = address.substring(0, index).lastIndexOf('.');
       
  1234     }
       
  1235 
       
  1236     if (index+1 < addrLength && isDigit(p_address.charAt(index+1))) {
       
  1237       char testChar;
       
  1238       int numDots = 0;
       
  1239 
       
  1240       // make sure that 1) we see only digits and dot separators, 2) that
       
  1241       // any dot separator is preceded and followed by a digit and
       
  1242       // 3) that we find 3 dots
       
  1243       for (int i = 0; i < addrLength; i++) {
       
  1244         testChar = address.charAt(i);
       
  1245         if (testChar == '.') {
       
  1246           if (!isDigit(address.charAt(i-1)) ||
       
  1247               (i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
       
  1248             return false;
       
  1249           }
       
  1250           numDots++;
       
  1251         }
       
  1252         else if (!isDigit(testChar)) {
       
  1253           return false;
       
  1254         }
       
  1255       }
       
  1256       if (numDots != 3) {
       
  1257         return false;
       
  1258       }
       
  1259     }
       
  1260     else {
       
  1261       // domain labels can contain alphanumerics and '-"
       
  1262       // but must start and end with an alphanumeric
       
  1263       char testChar;
       
  1264 
       
  1265       for (int i = 0; i < addrLength; i++) {
       
  1266         testChar = address.charAt(i);
       
  1267         if (testChar == '.') {
       
  1268           if (!isAlphanum(address.charAt(i-1))) {
       
  1269             return false;
       
  1270           }
       
  1271           if (i+1 < addrLength && !isAlphanum(address.charAt(i+1))) {
       
  1272             return false;
       
  1273           }
       
  1274         }
       
  1275         else if (!isAlphanum(testChar) && testChar != '-') {
       
  1276           return false;
       
  1277         }
       
  1278       }
       
  1279     }
       
  1280     return true;
       
  1281   }
       
  1282 
       
  1283 
       
  1284  /**
       
  1285   * Determine whether a char is a digit.
       
  1286   *
       
  1287   * @return true if the char is betweeen '0' and '9', false otherwise
       
  1288   */
       
  1289   private static boolean isDigit(char p_char) {
       
  1290     return p_char >= '0' && p_char <= '9';
       
  1291   }
       
  1292 
       
  1293  /**
       
  1294   * Determine whether a character is a hexadecimal character.
       
  1295   *
       
  1296   * @return true if the char is betweeen '0' and '9', 'a' and 'f'
       
  1297   *         or 'A' and 'F', false otherwise
       
  1298   */
       
  1299   private static boolean isHex(char p_char) {
       
  1300     return (isDigit(p_char) ||
       
  1301             (p_char >= 'a' && p_char <= 'f') ||
       
  1302             (p_char >= 'A' && p_char <= 'F'));
       
  1303   }
       
  1304 
       
  1305  /**
       
  1306   * Determine whether a char is an alphabetic character: a-z or A-Z
       
  1307   *
       
  1308   * @return true if the char is alphabetic, false otherwise
       
  1309   */
       
  1310   private static boolean isAlpha(char p_char) {
       
  1311     return ((p_char >= 'a' && p_char <= 'z') ||
       
  1312             (p_char >= 'A' && p_char <= 'Z' ));
       
  1313   }
       
  1314 
       
  1315  /**
       
  1316   * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z
       
  1317   *
       
  1318   * @return true if the char is alphanumeric, false otherwise
       
  1319   */
       
  1320   private static boolean isAlphanum(char p_char) {
       
  1321     return (isAlpha(p_char) || isDigit(p_char));
       
  1322   }
       
  1323 
       
  1324  /**
       
  1325   * Determine whether a character is a reserved character:
       
  1326   * ';', '/', '?', ':', '@', '&', '=', '+', '$' or ','
       
  1327   *
       
  1328   * @return true if the string contains any reserved characters
       
  1329   */
       
  1330   private static boolean isReservedCharacter(char p_char) {
       
  1331     return RESERVED_CHARACTERS.indexOf(p_char) != -1;
       
  1332   }
       
  1333 
       
  1334  /**
       
  1335   * Determine whether a char is an unreserved character.
       
  1336   *
       
  1337   * @return true if the char is unreserved, false otherwise
       
  1338   */
       
  1339   private static boolean isUnreservedCharacter(char p_char) {
       
  1340     return (isAlphanum(p_char) ||
       
  1341             MARK_CHARACTERS.indexOf(p_char) != -1);
       
  1342   }
       
  1343 
       
  1344  /**
       
  1345   * Determine whether a given string contains only URI characters (also
       
  1346   * called "uric" in RFC 2396). uric consist of all reserved
       
  1347   * characters, unreserved characters and escaped characters.
       
  1348   *
       
  1349   * @return true if the string is comprised of uric, false otherwise
       
  1350   */
       
  1351   private static boolean isURIString(String p_uric) {
       
  1352     if (p_uric == null) {
       
  1353       return false;
       
  1354     }
       
  1355     int end = p_uric.length();
       
  1356     char testChar = '\0';
       
  1357     for (int i = 0; i < end; i++) {
       
  1358       testChar = p_uric.charAt(i);
       
  1359       if (testChar == '%') {
       
  1360         if (i+2 >= end ||
       
  1361             !isHex(p_uric.charAt(i+1)) ||
       
  1362             !isHex(p_uric.charAt(i+2))) {
       
  1363           return false;
       
  1364         }
       
  1365         else {
       
  1366           i += 2;
       
  1367           continue;
       
  1368         }
       
  1369       }
       
  1370       if (isReservedCharacter(testChar) ||
       
  1371           isUnreservedCharacter(testChar)) {
       
  1372           continue;
       
  1373       }
       
  1374       else {
       
  1375         return false;
       
  1376       }
       
  1377     }
       
  1378     return true;
       
  1379   }
       
  1380 }