1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 1999-2005 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package com.sun.org.apache.xerces.internal.util;
22
23 import com.sun.org.apache.xerces.internal.utils.Objects;
24 import java.io.IOException;
25 import java.io.Serializable;
26
27 /**********************************************************************
28 * A class to represent a Uniform Resource Identifier (URI). This class
29 * is designed to handle the parsing of URIs and provide access to
30 * the various components (scheme, host, port, userinfo, path, query
31 * string and fragment) that may constitute a URI.
32 * <p>
33 * Parsing of a URI specification is done according to the URI
34 * syntax described in
35 * <a href="http://www.ietf.org/rfc/rfc2396.txt?number=2396">RFC 2396</a>,
36 * and amended by
37 * <a href="http://www.ietf.org/rfc/rfc2732.txt?number=2732">RFC 2732</a>.
38 * <p>
39 * Every absolute URI consists of a scheme, followed by a colon (':'),
40 * followed by a scheme-specific part. For URIs that follow the
41 * "generic URI" syntax, the scheme-specific part begins with two
42 * slashes ("//") and may be followed by an authority segment (comprised
43 * of user information, host, and port), path segment, query segment
44 * and fragment. Note that RFC 2396 no longer specifies the use of the
45 * parameters segment and excludes the "user:password" syntax as part of
46 * the authority segment. If "user:password" appears in a URI, the entire
47 * user/password string is stored as userinfo.
48 * <p>
49 * For URIs that do not follow the "generic URI" syntax (e.g. mailto),
50 * the entire scheme-specific part is treated as the "path" portion
51 * of the URI.
52 * <p>
53 * Note that, unlike the java.net.URL class, this class does not provide
54 * any built-in network access functionality nor does it provide any
55 * scheme-specific functionality (for example, it does not know a
56 * default port for a specific scheme). Rather, it only knows the
57 * grammar and basic set of operations that can be applied to a URI.
58 *
59 *
60 **********************************************************************/
61 public class URI implements Serializable {
62
63 /*******************************************************************
64 * MalformedURIExceptions are thrown in the process of building a URI
65 * or setting fields on a URI when an operation would result in an
66 * invalid URI specification.
67 *
68 ********************************************************************/
69 public static class MalformedURIException extends IOException {
70
71 /** Serialization version. */
72 static final long serialVersionUID = -6695054834342951930L;
73
74 /******************************************************************
75 * Constructs a <code>MalformedURIException</code> with no specified
76 * detail message.
77 ******************************************************************/
78 public MalformedURIException() {
79 super();
80 }
81
82 /*****************************************************************
83 * Constructs a <code>MalformedURIException</code> with the
84 * specified detail message.
85 *
86 * @param p_msg the detail message.
87 ******************************************************************/
88 public MalformedURIException(String p_msg) {
89 super(p_msg);
90 }
91 }
92
93 /** Serialization version. */
94 static final long serialVersionUID = 1601921774685357214L;
95
96 private static final byte [] fgLookupTable = new byte[128];
97
98 /**
99 * Character Classes
100 */
101
102 /** reserved characters ;/?:@&=+$,[] */
103 //RFC 2732 added '[' and ']' as reserved characters
104 private static final int RESERVED_CHARACTERS = 0x01;
105
106 /** URI punctuation mark characters: -_.!~*'() - these, combined with
107 alphanumerics, constitute the "unreserved" characters */
108 private static final int MARK_CHARACTERS = 0x02;
109
110 /** scheme can be composed of alphanumerics and these characters: +-. */
111 private static final int SCHEME_CHARACTERS = 0x04;
112
113 /** userinfo can be composed of unreserved, escaped and these
114 characters: ;:&=+$, */
115 private static final int USERINFO_CHARACTERS = 0x08;
116
117 /** ASCII letter characters */
118 private static final int ASCII_ALPHA_CHARACTERS = 0x10;
119
120 /** ASCII digit characters */
121 private static final int ASCII_DIGIT_CHARACTERS = 0x20;
122
123 /** ASCII hex characters */
124 private static final int ASCII_HEX_CHARACTERS = 0x40;
125
126 /** Path characters */
127 private static final int PATH_CHARACTERS = 0x80;
128
129 /** Mask for alpha-numeric characters */
130 private static final int MASK_ALPHA_NUMERIC = ASCII_ALPHA_CHARACTERS | ASCII_DIGIT_CHARACTERS;
131
132 /** Mask for unreserved characters */
133 private static final int MASK_UNRESERVED_MASK = MASK_ALPHA_NUMERIC | MARK_CHARACTERS;
134
135 /** Mask for URI allowable characters except for % */
136 private static final int MASK_URI_CHARACTER = MASK_UNRESERVED_MASK | RESERVED_CHARACTERS;
137
138 /** Mask for scheme characters */
139 private static final int MASK_SCHEME_CHARACTER = MASK_ALPHA_NUMERIC | SCHEME_CHARACTERS;
140
141 /** Mask for userinfo characters */
142 private static final int MASK_USERINFO_CHARACTER = MASK_UNRESERVED_MASK | USERINFO_CHARACTERS;
143
144 /** Mask for path characters */
145 private static final int MASK_PATH_CHARACTER = MASK_UNRESERVED_MASK | PATH_CHARACTERS;
146
147 static {
148 // Add ASCII Digits and ASCII Hex Numbers
149 for (int i = '0'; i <= '9'; ++i) {
150 fgLookupTable[i] |= ASCII_DIGIT_CHARACTERS | ASCII_HEX_CHARACTERS;
151 }
152
153 // Add ASCII Letters and ASCII Hex Numbers
154 for (int i = 'A'; i <= 'F'; ++i) {
155 fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
156 fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
157 }
158
159 // Add ASCII Letters
160 for (int i = 'G'; i <= 'Z'; ++i) {
161 fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS;
162 fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS;
163 }
164
165 // Add Reserved Characters
166 fgLookupTable[';'] |= RESERVED_CHARACTERS;
167 fgLookupTable['/'] |= RESERVED_CHARACTERS;
168 fgLookupTable['?'] |= RESERVED_CHARACTERS;
169 fgLookupTable[':'] |= RESERVED_CHARACTERS;
170 fgLookupTable['@'] |= RESERVED_CHARACTERS;
171 fgLookupTable['&'] |= RESERVED_CHARACTERS;
172 fgLookupTable['='] |= RESERVED_CHARACTERS;
173 fgLookupTable['+'] |= RESERVED_CHARACTERS;
174 fgLookupTable['$'] |= RESERVED_CHARACTERS;
175 fgLookupTable[','] |= RESERVED_CHARACTERS;
176 fgLookupTable['['] |= RESERVED_CHARACTERS;
177 fgLookupTable[']'] |= RESERVED_CHARACTERS;
178
179 // Add Mark Characters
180 fgLookupTable['-'] |= MARK_CHARACTERS;
181 fgLookupTable['_'] |= MARK_CHARACTERS;
182 fgLookupTable['.'] |= MARK_CHARACTERS;
183 fgLookupTable['!'] |= MARK_CHARACTERS;
184 fgLookupTable['~'] |= MARK_CHARACTERS;
185 fgLookupTable['*'] |= MARK_CHARACTERS;
186 fgLookupTable['\''] |= MARK_CHARACTERS;
187 fgLookupTable['('] |= MARK_CHARACTERS;
188 fgLookupTable[')'] |= MARK_CHARACTERS;
189
190 // Add Scheme Characters
191 fgLookupTable['+'] |= SCHEME_CHARACTERS;
192 fgLookupTable['-'] |= SCHEME_CHARACTERS;
193 fgLookupTable['.'] |= SCHEME_CHARACTERS;
194
195 // Add Userinfo Characters
196 fgLookupTable[';'] |= USERINFO_CHARACTERS;
197 fgLookupTable[':'] |= USERINFO_CHARACTERS;
198 fgLookupTable['&'] |= USERINFO_CHARACTERS;
199 fgLookupTable['='] |= USERINFO_CHARACTERS;
200 fgLookupTable['+'] |= USERINFO_CHARACTERS;
201 fgLookupTable['$'] |= USERINFO_CHARACTERS;
202 fgLookupTable[','] |= USERINFO_CHARACTERS;
203
204 // Add Path Characters
205 fgLookupTable[';'] |= PATH_CHARACTERS;
206 fgLookupTable['/'] |= PATH_CHARACTERS;
207 fgLookupTable[':'] |= PATH_CHARACTERS;
208 fgLookupTable['@'] |= PATH_CHARACTERS;
209 fgLookupTable['&'] |= PATH_CHARACTERS;
210 fgLookupTable['='] |= PATH_CHARACTERS;
211 fgLookupTable['+'] |= PATH_CHARACTERS;
212 fgLookupTable['$'] |= PATH_CHARACTERS;
213 fgLookupTable[','] |= PATH_CHARACTERS;
214 }
215
216 /** Stores the scheme (usually the protocol) for this URI. */
217 private String m_scheme = null;
218
219 /** If specified, stores the userinfo for this URI; otherwise null */
220 private String m_userinfo = null;
221
222 /** If specified, stores the host for this URI; otherwise null */
223 private String m_host = null;
224
225 /** If specified, stores the port for this URI; otherwise -1 */
226 private int m_port = -1;
227
228 /** If specified, stores the registry based authority for this URI; otherwise -1 */
229 private String m_regAuthority = null;
230
231 /** If specified, stores the path for this URI; otherwise null */
232 private String m_path = null;
233
234 /** If specified, stores the query string for this URI; otherwise
235 null. */
236 private String m_queryString = null;
237
238 /** If specified, stores the fragment for this URI; otherwise null */
239 private String m_fragment = null;
240
241 private static boolean DEBUG = false;
242
243 /**
244 * Construct a new and uninitialized URI.
245 */
246 public URI() {
247 }
248
249 /**
250 * Construct a new URI from another URI. All fields for this URI are
251 * set equal to the fields of the URI passed in.
252 *
253 * @param p_other the URI to copy (cannot be null)
254 */
255 public URI(URI p_other) {
256 initialize(p_other);
257 }
258
259 /**
260 * Construct a new URI from a URI specification string. If the
261 * specification follows the "generic URI" syntax, (two slashes
262 * following the first colon), the specification will be parsed
263 * accordingly - setting the scheme, userinfo, host,port, path, query
264 * string and fragment fields as necessary. If the specification does
265 * not follow the "generic URI" syntax, the specification is parsed
266 * into a scheme and scheme-specific part (stored as the path) only.
267 *
268 * @param p_uriSpec the URI specification string (cannot be null or
269 * empty)
270 *
271 * @exception MalformedURIException if p_uriSpec violates any syntax
272 * rules
273 */
274 public URI(String p_uriSpec) throws MalformedURIException {
275 this((URI)null, p_uriSpec);
276 }
277
278 /**
279 * Construct a new URI from a URI specification string. If the
280 * specification follows the "generic URI" syntax, (two slashes
281 * following the first colon), the specification will be parsed
282 * accordingly - setting the scheme, userinfo, host,port, path, query
283 * string and fragment fields as necessary. If the specification does
284 * not follow the "generic URI" syntax, the specification is parsed
285 * into a scheme and scheme-specific part (stored as the path) only.
286 * Construct a relative URI if boolean is assigned to "true"
287 * and p_uriSpec is not valid absolute URI, instead of throwing an exception.
288 *
289 * @param p_uriSpec the URI specification string (cannot be null or
290 * empty)
291 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
292 * false otherwise.
293 *
294 * @exception MalformedURIException if p_uriSpec violates any syntax
295 * rules
296 */
297 public URI(String p_uriSpec, boolean allowNonAbsoluteURI) throws MalformedURIException {
298 this((URI)null, p_uriSpec, allowNonAbsoluteURI);
299 }
300
301 /**
302 * Construct a new URI from a base URI and a URI specification string.
303 * The URI specification string may be a relative URI.
304 *
305 * @param p_base the base URI (cannot be null if p_uriSpec is null or
306 * empty)
307 * @param p_uriSpec the URI specification string (cannot be null or
308 * empty if p_base is null)
309 *
310 * @exception MalformedURIException if p_uriSpec violates any syntax
311 * rules
312 */
313 public URI(URI p_base, String p_uriSpec) throws MalformedURIException {
314 initialize(p_base, p_uriSpec);
315 }
316
317 /**
318 * Construct a new URI from a base URI and a URI specification string.
319 * The URI specification string may be a relative URI.
320 * Construct a relative URI if boolean is assigned to "true"
321 * and p_uriSpec is not valid absolute URI and p_base is null
322 * instead of throwing an exception.
323 *
324 * @param p_base the base URI (cannot be null if p_uriSpec is null or
325 * empty)
326 * @param p_uriSpec the URI specification string (cannot be null or
327 * empty if p_base is null)
328 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
329 * false otherwise.
330 *
331 * @exception MalformedURIException if p_uriSpec violates any syntax
332 * rules
333 */
334 public URI(URI p_base, String p_uriSpec, boolean allowNonAbsoluteURI) throws MalformedURIException {
335 initialize(p_base, p_uriSpec, allowNonAbsoluteURI);
336 }
337
338 /**
339 * Construct a new URI that does not follow the generic URI syntax.
340 * Only the scheme and scheme-specific part (stored as the path) are
341 * initialized.
342 *
343 * @param p_scheme the URI scheme (cannot be null or empty)
344 * @param p_schemeSpecificPart the scheme-specific part (cannot be
345 * null or empty)
346 *
347 * @exception MalformedURIException if p_scheme violates any
348 * syntax rules
349 */
350 public URI(String p_scheme, String p_schemeSpecificPart)
351 throws MalformedURIException {
352 if (p_scheme == null || p_scheme.trim().length() == 0) {
353 throw new MalformedURIException(
354 "Cannot construct URI with null/empty scheme!");
355 }
356 if (p_schemeSpecificPart == null ||
357 p_schemeSpecificPart.trim().length() == 0) {
358 throw new MalformedURIException(
359 "Cannot construct URI with null/empty scheme-specific part!");
360 }
361 setScheme(p_scheme);
362 setPath(p_schemeSpecificPart);
363 }
364
365 /**
366 * Construct a new URI that follows the generic URI syntax from its
367 * component parts. Each component is validated for syntax and some
368 * basic semantic checks are performed as well. See the individual
369 * setter methods for specifics.
370 *
371 * @param p_scheme the URI scheme (cannot be null or empty)
372 * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
373 * @param p_path the URI path - if the path contains '?' or '#',
374 * then the query string and/or fragment will be
375 * set from the path; however, if the query and
376 * fragment are specified both in the path and as
377 * separate parameters, an exception is thrown
378 * @param p_queryString the URI query string (cannot be specified
379 * if path is null)
380 * @param p_fragment the URI fragment (cannot be specified if path
381 * is null)
382 *
383 * @exception MalformedURIException if any of the parameters violates
384 * syntax rules or semantic rules
385 */
386 public URI(String p_scheme, String p_host, String p_path,
387 String p_queryString, String p_fragment)
388 throws MalformedURIException {
389 this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment);
390 }
391
392 /**
393 * Construct a new URI that follows the generic URI syntax from its
394 * component parts. Each component is validated for syntax and some
395 * basic semantic checks are performed as well. See the individual
396 * setter methods for specifics.
397 *
398 * @param p_scheme the URI scheme (cannot be null or empty)
399 * @param p_userinfo the URI userinfo (cannot be specified if host
400 * is null)
401 * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
402 * @param p_port the URI port (may be -1 for "unspecified"; cannot
403 * be specified if host is null)
404 * @param p_path the URI path - if the path contains '?' or '#',
405 * then the query string and/or fragment will be
406 * set from the path; however, if the query and
407 * fragment are specified both in the path and as
408 * separate parameters, an exception is thrown
409 * @param p_queryString the URI query string (cannot be specified
410 * if path is null)
411 * @param p_fragment the URI fragment (cannot be specified if path
412 * is null)
413 *
414 * @exception MalformedURIException if any of the parameters violates
415 * syntax rules or semantic rules
416 */
417 public URI(String p_scheme, String p_userinfo,
418 String p_host, int p_port, String p_path,
419 String p_queryString, String p_fragment)
420 throws MalformedURIException {
421 if (p_scheme == null || p_scheme.trim().length() == 0) {
422 throw new MalformedURIException("Scheme is required!");
423 }
424
425 if (p_host == null) {
426 if (p_userinfo != null) {
427 throw new MalformedURIException(
428 "Userinfo may not be specified if host is not specified!");
429 }
430 if (p_port != -1) {
431 throw new MalformedURIException(
432 "Port may not be specified if host is not specified!");
433 }
434 }
435
436 if (p_path != null) {
437 if (p_path.indexOf('?') != -1 && p_queryString != null) {
438 throw new MalformedURIException(
439 "Query string cannot be specified in path and query string!");
440 }
441
442 if (p_path.indexOf('#') != -1 && p_fragment != null) {
443 throw new MalformedURIException(
444 "Fragment cannot be specified in both the path and fragment!");
445 }
446 }
447
448 setScheme(p_scheme);
449 setHost(p_host);
450 setPort(p_port);
451 setUserinfo(p_userinfo);
452 setPath(p_path);
453 setQueryString(p_queryString);
454 setFragment(p_fragment);
455 }
456
457 /**
458 * Initialize all fields of this URI from another URI.
459 *
460 * @param p_other the URI to copy (cannot be null)
461 */
462 private void initialize(URI p_other) {
463 m_scheme = p_other.getScheme();
464 m_userinfo = p_other.getUserinfo();
465 m_host = p_other.getHost();
466 m_port = p_other.getPort();
467 m_regAuthority = p_other.getRegBasedAuthority();
468 m_path = p_other.getPath();
469 m_queryString = p_other.getQueryString();
470 m_fragment = p_other.getFragment();
471 }
472
473 /**
474 * Initializes this URI from a base URI and a URI specification string.
475 * See RFC 2396 Section 4 and Appendix B for specifications on parsing
476 * the URI and Section 5 for specifications on resolving relative URIs
477 * and relative paths.
478 *
479 * @param p_base the base URI (may be null if p_uriSpec is an absolute
480 * URI)
481 * @param p_uriSpec the URI spec string which may be an absolute or
482 * relative URI (can only be null/empty if p_base
483 * is not null)
484 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
485 * in case of relative URI, false otherwise.
486 *
487 * @exception MalformedURIException if p_base is null and p_uriSpec
488 * is not an absolute URI or if
489 * p_uriSpec violates syntax rules
490 */
491 private void initialize(URI p_base, String p_uriSpec, boolean allowNonAbsoluteURI)
492 throws MalformedURIException {
493
494 String uriSpec = p_uriSpec;
495 int uriSpecLen = (uriSpec != null) ? uriSpec.length() : 0;
496
497 if (p_base == null && uriSpecLen == 0) {
498 if (allowNonAbsoluteURI) {
499 m_path = "";
500 return;
501 }
502 throw new MalformedURIException("Cannot initialize URI with empty parameters.");
503 }
504
505 // just make a copy of the base if spec is empty
506 if (uriSpecLen == 0) {
507 initialize(p_base);
508 return;
509 }
510
511 int index = 0;
512
513 // Check for scheme, which must be before '/', '?' or '#'.
514 int colonIdx = uriSpec.indexOf(':');
515 if (colonIdx != -1) {
516 final int searchFrom = colonIdx - 1;
517 // search backwards starting from character before ':'.
518 int slashIdx = uriSpec.lastIndexOf('/', searchFrom);
519 int queryIdx = uriSpec.lastIndexOf('?', searchFrom);
520 int fragmentIdx = uriSpec.lastIndexOf('#', searchFrom);
521
522 if (colonIdx == 0 || slashIdx != -1 ||
523 queryIdx != -1 || fragmentIdx != -1) {
524 // A standalone base is a valid URI according to spec
525 if (colonIdx == 0 || (p_base == null && fragmentIdx != 0 && !allowNonAbsoluteURI)) {
526 throw new MalformedURIException("No scheme found in URI.");
527 }
528 }
529 else {
530 initializeScheme(uriSpec);
531 index = m_scheme.length()+1;
532
533 // Neither 'scheme:' or 'scheme:#fragment' are valid URIs.
534 if (colonIdx == uriSpecLen - 1 || uriSpec.charAt(colonIdx+1) == '#') {
535 throw new MalformedURIException("Scheme specific part cannot be empty.");
536 }
537 }
538 }
539 else if (p_base == null && uriSpec.indexOf('#') != 0 && !allowNonAbsoluteURI) {
540 throw new MalformedURIException("No scheme found in URI.");
541 }
542
543 // Two slashes means we may have authority, but definitely means we're either
544 // matching net_path or abs_path. These two productions are ambiguous in that
545 // every net_path (except those containing an IPv6Reference) is an abs_path.
546 // RFC 2396 resolves this ambiguity by applying a greedy left most matching rule.
547 // Try matching net_path first, and if that fails we don't have authority so
548 // then attempt to match abs_path.
549 //
550 // net_path = "//" authority [ abs_path ]
551 // abs_path = "/" path_segments
552 if (((index+1) < uriSpecLen) &&
553 (uriSpec.charAt(index) == '/' && uriSpec.charAt(index+1) == '/')) {
554 index += 2;
555 int startPos = index;
556
557 // Authority will be everything up to path, query or fragment
558 char testChar = '\0';
559 while (index < uriSpecLen) {
560 testChar = uriSpec.charAt(index);
561 if (testChar == '/' || testChar == '?' || testChar == '#') {
562 break;
563 }
564 index++;
565 }
566
567 // Attempt to parse authority. If the section is an empty string
568 // this is a valid server based authority, so set the host to this
569 // value.
570 if (index > startPos) {
571 // If we didn't find authority we need to back up. Attempt to
572 // match against abs_path next.
573 if (!initializeAuthority(uriSpec.substring(startPos, index))) {
574 index = startPos - 2;
575 }
576 }
577 else {
578 m_host = "";
579 }
580 }
581
582 initializePath(uriSpec, index);
583
584 // Resolve relative URI to base URI - see RFC 2396 Section 5.2
585 // In some cases, it might make more sense to throw an exception
586 // (when scheme is specified is the string spec and the base URI
587 // is also specified, for example), but we're just following the
588 // RFC specifications
589 if (p_base != null) {
590 absolutize(p_base);
591 }
592 }
593
594 /**
595 * Initializes this URI from a base URI and a URI specification string.
596 * See RFC 2396 Section 4 and Appendix B for specifications on parsing
597 * the URI and Section 5 for specifications on resolving relative URIs
598 * and relative paths.
599 *
600 * @param p_base the base URI (may be null if p_uriSpec is an absolute
601 * URI)
602 * @param p_uriSpec the URI spec string which may be an absolute or
603 * relative URI (can only be null/empty if p_base
604 * is not null)
605 *
606 * @exception MalformedURIException if p_base is null and p_uriSpec
607 * is not an absolute URI or if
608 * p_uriSpec violates syntax rules
609 */
610 private void initialize(URI p_base, String p_uriSpec)
611 throws MalformedURIException {
612
613 String uriSpec = p_uriSpec;
614 int uriSpecLen = (uriSpec != null) ? uriSpec.length() : 0;
615
616 if (p_base == null && uriSpecLen == 0) {
617 throw new MalformedURIException(
618 "Cannot initialize URI with empty parameters.");
619 }
620
621 // just make a copy of the base if spec is empty
622 if (uriSpecLen == 0) {
623 initialize(p_base);
624 return;
625 }
626
627 int index = 0;
628
629 // Check for scheme, which must be before '/', '?' or '#'.
630 int colonIdx = uriSpec.indexOf(':');
631 if (colonIdx != -1) {
632 final int searchFrom = colonIdx - 1;
633 // search backwards starting from character before ':'.
634 int slashIdx = uriSpec.lastIndexOf('/', searchFrom);
635 int queryIdx = uriSpec.lastIndexOf('?', searchFrom);
636 int fragmentIdx = uriSpec.lastIndexOf('#', searchFrom);
637
638 if (colonIdx == 0 || slashIdx != -1 ||
639 queryIdx != -1 || fragmentIdx != -1) {
640 // A standalone base is a valid URI according to spec
641 if (colonIdx == 0 || (p_base == null && fragmentIdx != 0)) {
642 throw new MalformedURIException("No scheme found in URI.");
643 }
644 }
645 else {
646 initializeScheme(uriSpec);
647 index = m_scheme.length()+1;
648
649 // Neither 'scheme:' or 'scheme:#fragment' are valid URIs.
650 if (colonIdx == uriSpecLen - 1 || uriSpec.charAt(colonIdx+1) == '#') {
651 throw new MalformedURIException("Scheme specific part cannot be empty.");
652 }
653 }
654 }
655 else if (p_base == null && uriSpec.indexOf('#') != 0) {
656 throw new MalformedURIException("No scheme found in URI.");
657 }
658
659 // Two slashes means we may have authority, but definitely means we're either
660 // matching net_path or abs_path. These two productions are ambiguous in that
661 // every net_path (except those containing an IPv6Reference) is an abs_path.
662 // RFC 2396 resolves this ambiguity by applying a greedy left most matching rule.
663 // Try matching net_path first, and if that fails we don't have authority so
664 // then attempt to match abs_path.
665 //
666 // net_path = "//" authority [ abs_path ]
667 // abs_path = "/" path_segments
668 if (((index+1) < uriSpecLen) &&
669 (uriSpec.charAt(index) == '/' && uriSpec.charAt(index+1) == '/')) {
670 index += 2;
671 int startPos = index;
672
673 // Authority will be everything up to path, query or fragment
674 char testChar = '\0';
675 while (index < uriSpecLen) {
676 testChar = uriSpec.charAt(index);
677 if (testChar == '/' || testChar == '?' || testChar == '#') {
678 break;
679 }
680 index++;
681 }
682
683 // Attempt to parse authority. If the section is an empty string
684 // this is a valid server based authority, so set the host to this
685 // value.
686 if (index > startPos) {
687 // If we didn't find authority we need to back up. Attempt to
688 // match against abs_path next.
689 if (!initializeAuthority(uriSpec.substring(startPos, index))) {
690 index = startPos - 2;
691 }
692 }
693 else {
694 m_host = "";
695 }
696 }
697
698 initializePath(uriSpec, index);
699
700 // Resolve relative URI to base URI - see RFC 2396 Section 5.2
701 // In some cases, it might make more sense to throw an exception
702 // (when scheme is specified is the string spec and the base URI
703 // is also specified, for example), but we're just following the
704 // RFC specifications
705 if (p_base != null) {
706 absolutize(p_base);
707 }
708 }
709
710 /**
711 * Absolutize URI with given base URI.
712 *
713 * @param p_base base URI for absolutization
714 */
715 public void absolutize(URI p_base) {
716
717 // check to see if this is the current doc - RFC 2396 5.2 #2
718 // note that this is slightly different from the RFC spec in that
719 // we don't include the check for query string being null
720 // - this handles cases where the urispec is just a query
721 // string or a fragment (e.g. "?y" or "#s") -
722 // see <http://www.ics.uci.edu/~fielding/url/test1.html> which
723 // identified this as a bug in the RFC
724 if (m_path.length() == 0 && m_scheme == null &&
725 m_host == null && m_regAuthority == null) {
726 m_scheme = p_base.getScheme();
727 m_userinfo = p_base.getUserinfo();
728 m_host = p_base.getHost();
729 m_port = p_base.getPort();
730 m_regAuthority = p_base.getRegBasedAuthority();
731 m_path = p_base.getPath();
732
733 if (m_queryString == null) {
734 m_queryString = p_base.getQueryString();
735
736 if (m_fragment == null) {
737 m_fragment = p_base.getFragment();
738 }
739 }
740 return;
741 }
742
743 // check for scheme - RFC 2396 5.2 #3
744 // if we found a scheme, it means absolute URI, so we're done
745 if (m_scheme == null) {
746 m_scheme = p_base.getScheme();
747 }
748 else {
749 return;
750 }
751
752 // check for authority - RFC 2396 5.2 #4
753 // if we found a host, then we've got a network path, so we're done
754 if (m_host == null && m_regAuthority == null) {
755 m_userinfo = p_base.getUserinfo();
756 m_host = p_base.getHost();
757 m_port = p_base.getPort();
758 m_regAuthority = p_base.getRegBasedAuthority();
759 }
760 else {
761 return;
762 }
763
764 // check for absolute path - RFC 2396 5.2 #5
765 if (m_path.length() > 0 &&
766 m_path.startsWith("/")) {
767 return;
768 }
769
770 // if we get to this point, we need to resolve relative path
771 // RFC 2396 5.2 #6
772 String path = "";
773 String basePath = p_base.getPath();
774
775 // 6a - get all but the last segment of the base URI path
776 if (basePath != null && basePath.length() > 0) {
777 int lastSlash = basePath.lastIndexOf('/');
778 if (lastSlash != -1) {
779 path = basePath.substring(0, lastSlash+1);
780 }
781 }
782 else if (m_path.length() > 0) {
783 path = "/";
784 }
785
786 // 6b - append the relative URI path
787 path = path.concat(m_path);
788
789 // 6c - remove all "./" where "." is a complete path segment
790 int index = -1;
791 while ((index = path.indexOf("/./")) != -1) {
792 path = path.substring(0, index+1).concat(path.substring(index+3));
793 }
794
795 // 6d - remove "." if path ends with "." as a complete path segment
796 if (path.endsWith("/.")) {
797 path = path.substring(0, path.length()-1);
798 }
799
800 // 6e - remove all "<segment>/../" where "<segment>" is a complete
801 // path segment not equal to ".."
802 index = 1;
803 int segIndex = -1;
804 String tempString = null;
805
806 while ((index = path.indexOf("/../", index)) > 0) {
807 tempString = path.substring(0, path.indexOf("/../"));
808 segIndex = tempString.lastIndexOf('/');
809 if (segIndex != -1) {
810 if (!tempString.substring(segIndex).equals("..")) {
811 path = path.substring(0, segIndex+1).concat(path.substring(index+4));
812 index = segIndex;
813 }
814 else {
815 index += 4;
816 }
817 }
818 else {
819 index += 4;
820 }
821 }
822
823 // 6f - remove ending "<segment>/.." where "<segment>" is a
824 // complete path segment
825 if (path.endsWith("/..")) {
826 tempString = path.substring(0, path.length()-3);
827 segIndex = tempString.lastIndexOf('/');
828 if (segIndex != -1) {
829 path = path.substring(0, segIndex+1);
830 }
831 }
832 m_path = path;
833 }
834
835 /**
836 * Initialize the scheme for this URI from a URI string spec.
837 *
838 * @param p_uriSpec the URI specification (cannot be null)
839 *
840 * @exception MalformedURIException if URI does not have a conformant
841 * scheme
842 */
843 private void initializeScheme(String p_uriSpec)
844 throws MalformedURIException {
845 int uriSpecLen = p_uriSpec.length();
846 int index = 0;
847 String scheme = null;
848 char testChar = '\0';
849
850 while (index < uriSpecLen) {
851 testChar = p_uriSpec.charAt(index);
852 if (testChar == ':' || testChar == '/' ||
853 testChar == '?' || testChar == '#') {
854 break;
855 }
856 index++;
857 }
858 scheme = p_uriSpec.substring(0, index);
859
860 if (scheme.length() == 0) {
861 throw new MalformedURIException("No scheme found in URI.");
862 }
863 else {
864 setScheme(scheme);
865 }
866 }
867
868 /**
869 * Initialize the authority (either server or registry based)
870 * for this URI from a URI string spec.
871 *
872 * @param p_uriSpec the URI specification (cannot be null)
873 *
874 * @return true if the given string matched server or registry
875 * based authority
876 */
877 private boolean initializeAuthority(String p_uriSpec) {
878
879 int index = 0;
880 int start = 0;
881 int end = p_uriSpec.length();
882
883 char testChar = '\0';
884 String userinfo = null;
885
886 // userinfo is everything up to @
887 if (p_uriSpec.indexOf('@', start) != -1) {
888 while (index < end) {
889 testChar = p_uriSpec.charAt(index);
890 if (testChar == '@') {
891 break;
892 }
893 index++;
894 }
895 userinfo = p_uriSpec.substring(start, index);
896 index++;
897 }
898
899 // host is everything up to last ':', or up to
900 // and including ']' if followed by ':'.
901 String host = null;
902 start = index;
903 boolean hasPort = false;
904 if (index < end) {
905 if (p_uriSpec.charAt(start) == '[') {
906 int bracketIndex = p_uriSpec.indexOf(']', start);
907 index = (bracketIndex != -1) ? bracketIndex : end;
908 if (index+1 < end && p_uriSpec.charAt(index+1) == ':') {
909 ++index;
910 hasPort = true;
911 }
912 else {
913 index = end;
914 }
915 }
916 else {
917 int colonIndex = p_uriSpec.lastIndexOf(':', end);
918 index = (colonIndex > start) ? colonIndex : end;
919 hasPort = (index != end);
920 }
921 }
922 host = p_uriSpec.substring(start, index);
923 int port = -1;
924 if (host.length() > 0) {
925 // port
926 if (hasPort) {
927 index++;
928 start = index;
929 while (index < end) {
930 index++;
931 }
932 String portStr = p_uriSpec.substring(start, index);
933 if (portStr.length() > 0) {
934 // REVISIT: Remove this code.
935 /** for (int i = 0; i < portStr.length(); i++) {
936 if (!isDigit(portStr.charAt(i))) {
937 throw new MalformedURIException(
938 portStr +
939 " is invalid. Port should only contain digits!");
940 }
941 }**/
942 // REVISIT: Remove this code.
943 // Store port value as string instead of integer.
944 try {
945 port = Integer.parseInt(portStr);
946 if (port == -1) --port;
947 }
948 catch (NumberFormatException nfe) {
949 port = -2;
950 }
951 }
952 }
953 }
954
955 if (isValidServerBasedAuthority(host, port, userinfo)) {
956 m_host = host;
957 m_port = port;
958 m_userinfo = userinfo;
959 return true;
960 }
961 // Note: Registry based authority is being removed from a
962 // new spec for URI which would obsolete RFC 2396. If the
963 // spec is added to XML errata, processing of reg_name
964 // needs to be removed. - mrglavas.
965 else if (isValidRegistryBasedAuthority(p_uriSpec)) {
966 m_regAuthority = p_uriSpec;
967 return true;
968 }
969 return false;
970 }
971
972 /**
973 * Determines whether the components host, port, and user info
974 * are valid as a server authority.
975 *
976 * @param host the host component of authority
977 * @param port the port number component of authority
978 * @param userinfo the user info component of authority
979 *
980 * @return true if the given host, port, and userinfo compose
981 * a valid server authority
982 */
983 private boolean isValidServerBasedAuthority(String host, int port, String userinfo) {
984
985 // Check if the host is well formed.
986 if (!isWellFormedAddress(host)) {
987 return false;
988 }
989
990 // Check that port is well formed if it exists.
991 // REVISIT: There's no restriction on port value ranges, but
992 // perform the same check as in setPort to be consistent. Pass
993 // in a string to this method instead of an integer.
994 if (port < -1 || port > 65535) {
995 return false;
996 }
997
998 // Check that userinfo is well formed if it exists.
999 if (userinfo != null) {
1000 // Userinfo can contain alphanumerics, mark characters, escaped
1001 // and ';',':','&','=','+','$',','
1002 int index = 0;
1003 int end = userinfo.length();
1004 char testChar = '\0';
1005 while (index < end) {
1006 testChar = userinfo.charAt(index);
1007 if (testChar == '%') {
1008 if (index+2 >= end ||
1009 !isHex(userinfo.charAt(index+1)) ||
1010 !isHex(userinfo.charAt(index+2))) {
1011 return false;
1012 }
1013 index += 2;
1014 }
1015 else if (!isUserinfoCharacter(testChar)) {
1016 return false;
1017 }
1018 ++index;
1019 }
1020 }
1021 return true;
1022 }
1023
1024 /**
1025 * Determines whether the given string is a registry based authority.
1026 *
1027 * @param authority the authority component of a URI
1028 *
1029 * @return true if the given string is a registry based authority
1030 */
1031 private boolean isValidRegistryBasedAuthority(String authority) {
1032 int index = 0;
1033 int end = authority.length();
1034 char testChar;
1035
1036 while (index < end) {
1037 testChar = authority.charAt(index);
1038
1039 // check for valid escape sequence
1040 if (testChar == '%') {
1041 if (index+2 >= end ||
1042 !isHex(authority.charAt(index+1)) ||
1043 !isHex(authority.charAt(index+2))) {
1044 return false;
1045 }
1046 index += 2;
1047 }
1048 // can check against path characters because the set
1049 // is the same except for '/' which we've already excluded.
1050 else if (!isPathCharacter(testChar)) {
1051 return false;
1052 }
1053 ++index;
1054 }
1055 return true;
1056 }
1057
1058 /**
1059 * Initialize the path for this URI from a URI string spec.
1060 *
1061 * @param p_uriSpec the URI specification (cannot be null)
1062 * @param p_nStartIndex the index to begin scanning from
1063 *
1064 * @exception MalformedURIException if p_uriSpec violates syntax rules
1065 */
1066 private void initializePath(String p_uriSpec, int p_nStartIndex)
1067 throws MalformedURIException {
1068 if (p_uriSpec == null) {
1069 throw new MalformedURIException(
1070 "Cannot initialize path from null string!");
1071 }
1072
1073 int index = p_nStartIndex;
1074 int start = p_nStartIndex;
1075 int end = p_uriSpec.length();
1076 char testChar = '\0';
1077
1078 // path - everything up to query string or fragment
1079 if (start < end) {
1080 // RFC 2732 only allows '[' and ']' to appear in the opaque part.
1081 if (getScheme() == null || p_uriSpec.charAt(start) == '/') {
1082
1083 // Scan path.
1084 // abs_path = "/" path_segments
1085 // rel_path = rel_segment [ abs_path ]
1086 while (index < end) {
1087 testChar = p_uriSpec.charAt(index);
1088
1089 // check for valid escape sequence
1090 if (testChar == '%') {
1091 if (index+2 >= end ||
1092 !isHex(p_uriSpec.charAt(index+1)) ||
1093 !isHex(p_uriSpec.charAt(index+2))) {
1094 throw new MalformedURIException(
1095 "Path contains invalid escape sequence!");
1096 }
1097 index += 2;
1098 }
1099 // Path segments cannot contain '[' or ']' since pchar
1100 // production was not changed by RFC 2732.
1101 else if (!isPathCharacter(testChar)) {
1102 if (testChar == '?' || testChar == '#') {
1103 break;
1104 }
1105 throw new MalformedURIException(
1106 "Path contains invalid character: " + testChar);
1107 }
1108 ++index;
1109 }
1110 }
1111 else {
1112
1113 // Scan opaque part.
1114 // opaque_part = uric_no_slash *uric
1115 while (index < end) {
1116 testChar = p_uriSpec.charAt(index);
1117
1118 if (testChar == '?' || testChar == '#') {
1119 break;
1120 }
1121
1122 // check for valid escape sequence
1123 if (testChar == '%') {
1124 if (index+2 >= end ||
1125 !isHex(p_uriSpec.charAt(index+1)) ||
1126 !isHex(p_uriSpec.charAt(index+2))) {
1127 throw new MalformedURIException(
1128 "Opaque part contains invalid escape sequence!");
1129 }
1130 index += 2;
1131 }
1132 // If the scheme specific part is opaque, it can contain '['
1133 // and ']'. uric_no_slash wasn't modified by RFC 2732, which
1134 // I've interpreted as an error in the spec, since the
1135 // production should be equivalent to (uric - '/'), and uric
1136 // contains '[' and ']'. - mrglavas
1137 else if (!isURICharacter(testChar)) {
1138 throw new MalformedURIException(
1139 "Opaque part contains invalid character: " + testChar);
1140 }
1141 ++index;
1142 }
1143 }
1144 }
1145 m_path = p_uriSpec.substring(start, index);
1146
1147 // query - starts with ? and up to fragment or end
1148 if (testChar == '?') {
1149 index++;
1150 start = index;
1151 while (index < end) {
1152 testChar = p_uriSpec.charAt(index);
1153 if (testChar == '#') {
1154 break;
1155 }
1156 if (testChar == '%') {
1157 if (index+2 >= end ||
1158 !isHex(p_uriSpec.charAt(index+1)) ||
1159 !isHex(p_uriSpec.charAt(index+2))) {
1160 throw new MalformedURIException(
1161 "Query string contains invalid escape sequence!");
1162 }
1163 index += 2;
1164 }
1165 else if (!isURICharacter(testChar)) {
1166 throw new MalformedURIException(
1167 "Query string contains invalid character: " + testChar);
1168 }
1169 index++;
1170 }
1171 m_queryString = p_uriSpec.substring(start, index);
1172 }
1173
1174 // fragment - starts with #
1175 if (testChar == '#') {
1176 index++;
1177 start = index;
1178 while (index < end) {
1179 testChar = p_uriSpec.charAt(index);
1180
1181 if (testChar == '%') {
1182 if (index+2 >= end ||
1183 !isHex(p_uriSpec.charAt(index+1)) ||
1184 !isHex(p_uriSpec.charAt(index+2))) {
1185 throw new MalformedURIException(
1186 "Fragment contains invalid escape sequence!");
1187 }
1188 index += 2;
1189 }
1190 else if (!isURICharacter(testChar)) {
1191 throw new MalformedURIException(
1192 "Fragment contains invalid character: "+testChar);
1193 }
1194 index++;
1195 }
1196 m_fragment = p_uriSpec.substring(start, index);
1197 }
1198 }
1199
1200 /**
1201 * Get the scheme for this URI.
1202 *
1203 * @return the scheme for this URI
1204 */
1205 public String getScheme() {
1206 return m_scheme;
1207 }
1208
1209 /**
1210 * Get the scheme-specific part for this URI (everything following the
1211 * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
1212 *
1213 * @return the scheme-specific part for this URI
1214 */
1215 public String getSchemeSpecificPart() {
1216 final StringBuilder schemespec = new StringBuilder();
1217
1218 if (m_host != null || m_regAuthority != null) {
1219 schemespec.append("//");
1220
1221 // Server based authority.
1222 if (m_host != null) {
1223
1224 if (m_userinfo != null) {
1225 schemespec.append(m_userinfo);
1226 schemespec.append('@');
1227 }
1228
1229 schemespec.append(m_host);
1230
1231 if (m_port != -1) {
1232 schemespec.append(':');
1233 schemespec.append(m_port);
1234 }
1235 }
1236 // Registry based authority.
1237 else {
1238 schemespec.append(m_regAuthority);
1239 }
1240 }
1241
1242 if (m_path != null) {
1243 schemespec.append((m_path));
1244 }
1245
1246 if (m_queryString != null) {
1247 schemespec.append('?');
1248 schemespec.append(m_queryString);
1249 }
1250
1251 if (m_fragment != null) {
1252 schemespec.append('#');
1253 schemespec.append(m_fragment);
1254 }
1255
1256 return schemespec.toString();
1257 }
1258
1259 /**
1260 * Get the userinfo for this URI.
1261 *
1262 * @return the userinfo for this URI (null if not specified).
1263 */
1264 public String getUserinfo() {
1265 return m_userinfo;
1266 }
1267
1268 /**
1269 * Get the host for this URI.
1270 *
1271 * @return the host for this URI (null if not specified).
1272 */
1273 public String getHost() {
1274 return m_host;
1275 }
1276
1277 /**
1278 * Get the port for this URI.
1279 *
1280 * @return the port for this URI (-1 if not specified).
1281 */
1282 public int getPort() {
1283 return m_port;
1284 }
1285
1286 /**
1287 * Get the registry based authority for this URI.
1288 *
1289 * @return the registry based authority (null if not specified).
1290 */
1291 public String getRegBasedAuthority() {
1292 return m_regAuthority;
1293 }
1294
1295 /**
1296 * Get the authority for this URI.
1297 *
1298 * @return the authority
1299 */
1300 public String getAuthority() {
1301 final StringBuilder authority = new StringBuilder();
1302 if (m_host != null || m_regAuthority != null) {
1303 authority.append("//");
1304
1305 // Server based authority.
1306 if (m_host != null) {
1307
1308 if (m_userinfo != null) {
1309 authority.append(m_userinfo);
1310 authority.append('@');
1311 }
1312
1313 authority.append(m_host);
1314
1315 if (m_port != -1) {
1316 authority.append(':');
1317 authority.append(m_port);
1318 }
1319 }
1320 // Registry based authority.
1321 else {
1322 authority.append(m_regAuthority);
1323 }
1324 }
1325 return authority.toString();
1326 }
1327
1328 /**
1329 * Get the path for this URI (optionally with the query string and
1330 * fragment).
1331 *
1332 * @param p_includeQueryString if true (and query string is not null),
1333 * then a "?" followed by the query string
1334 * will be appended
1335 * @param p_includeFragment if true (and fragment is not null),
1336 * then a "#" followed by the fragment
1337 * will be appended
1338 *
1339 * @return the path for this URI possibly including the query string
1340 * and fragment
1341 */
1342 public String getPath(boolean p_includeQueryString,
1343 boolean p_includeFragment) {
1344 final StringBuilder pathString = new StringBuilder(m_path);
1345
1346 if (p_includeQueryString && m_queryString != null) {
1347 pathString.append('?');
1348 pathString.append(m_queryString);
1349 }
1350
1351 if (p_includeFragment && m_fragment != null) {
1352 pathString.append('#');
1353 pathString.append(m_fragment);
1354 }
1355 return pathString.toString();
1356 }
1357
1358 /**
1359 * Get the path for this URI. Note that the value returned is the path
1360 * only and does not include the query string or fragment.
1361 *
1362 * @return the path for this URI.
1363 */
1364 public String getPath() {
1365 return m_path;
1366 }
1367
1368 /**
1369 * Get the query string for this URI.
1370 *
1371 * @return the query string for this URI. Null is returned if there
1372 * was no "?" in the URI spec, empty string if there was a
1373 * "?" but no query string following it.
1374 */
1375 public String getQueryString() {
1376 return m_queryString;
1377 }
1378
1379 /**
1380 * Get the fragment for this URI.
1381 *
1382 * @return the fragment for this URI. Null is returned if there
1383 * was no "#" in the URI spec, empty string if there was a
1384 * "#" but no fragment following it.
1385 */
1386 public String getFragment() {
1387 return m_fragment;
1388 }
1389
1390 /**
1391 * Set the scheme for this URI. The scheme is converted to lowercase
1392 * before it is set.
1393 *
1394 * @param p_scheme the scheme for this URI (cannot be null)
1395 *
1396 * @exception MalformedURIException if p_scheme is not a conformant
1397 * scheme name
1398 */
1399 public void setScheme(String p_scheme) throws MalformedURIException {
1400 if (p_scheme == null) {
1401 throw new MalformedURIException(
1402 "Cannot set scheme from null string!");
1403 }
1404 if (!isConformantSchemeName(p_scheme)) {
1405 throw new MalformedURIException("The scheme is not conformant.");
1406 }
1407
1408 m_scheme = p_scheme.toLowerCase();
1409 }
1410
1411 /**
1412 * Set the userinfo for this URI. If a non-null value is passed in and
1413 * the host value is null, then an exception is thrown.
1414 *
1415 * @param p_userinfo the userinfo for this URI
1416 *
1417 * @exception MalformedURIException if p_userinfo contains invalid
1418 * characters
1419 */
1420 public void setUserinfo(String p_userinfo) throws MalformedURIException {
1421 if (p_userinfo == null) {
1422 m_userinfo = null;
1423 return;
1424 }
1425 else {
1426 if (m_host == null) {
1427 throw new MalformedURIException(
1428 "Userinfo cannot be set when host is null!");
1429 }
1430
1431 // userinfo can contain alphanumerics, mark characters, escaped
1432 // and ';',':','&','=','+','$',','
1433 int index = 0;
1434 int end = p_userinfo.length();
1435 char testChar = '\0';
1436 while (index < end) {
1437 testChar = p_userinfo.charAt(index);
1438 if (testChar == '%') {
1439 if (index+2 >= end ||
1440 !isHex(p_userinfo.charAt(index+1)) ||
1441 !isHex(p_userinfo.charAt(index+2))) {
1442 throw new MalformedURIException(
1443 "Userinfo contains invalid escape sequence!");
1444 }
1445 }
1446 else if (!isUserinfoCharacter(testChar)) {
1447 throw new MalformedURIException(
1448 "Userinfo contains invalid character:"+testChar);
1449 }
1450 index++;
1451 }
1452 }
1453 m_userinfo = p_userinfo;
1454 }
1455
1456 /**
1457 * <p>Set the host for this URI. If null is passed in, the userinfo
1458 * field is also set to null and the port is set to -1.</p>
1459 *
1460 * <p>Note: This method overwrites registry based authority if it
1461 * previously existed in this URI.</p>
1462 *
1463 * @param p_host the host for this URI
1464 *
1465 * @exception MalformedURIException if p_host is not a valid IP
1466 * address or DNS hostname.
1467 */
1468 public void setHost(String p_host) throws MalformedURIException {
1469 if (p_host == null || p_host.length() == 0) {
1470 if (p_host != null) {
1471 m_regAuthority = null;
1472 }
1473 m_host = p_host;
1474 m_userinfo = null;
1475 m_port = -1;
1476 return;
1477 }
1478 else if (!isWellFormedAddress(p_host)) {
1479 throw new MalformedURIException("Host is not a well formed address!");
1480 }
1481 m_host = p_host;
1482 m_regAuthority = null;
1483 }
1484
1485 /**
1486 * Set the port for this URI. -1 is used to indicate that the port is
1487 * not specified, otherwise valid port numbers are between 0 and 65535.
1488 * If a valid port number is passed in and the host field is null,
1489 * an exception is thrown.
1490 *
1491 * @param p_port the port number for this URI
1492 *
1493 * @exception MalformedURIException if p_port is not -1 and not a
1494 * valid port number
1495 */
1496 public void setPort(int p_port) throws MalformedURIException {
1497 if (p_port >= 0 && p_port <= 65535) {
1498 if (m_host == null) {
1499 throw new MalformedURIException(
1500 "Port cannot be set when host is null!");
1501 }
1502 }
1503 else if (p_port != -1) {
1504 throw new MalformedURIException("Invalid port number!");
1505 }
1506 m_port = p_port;
1507 }
1508
1509 /**
1510 * <p>Sets the registry based authority for this URI.</p>
1511 *
1512 * <p>Note: This method overwrites server based authority
1513 * if it previously existed in this URI.</p>
1514 *
1515 * @param authority the registry based authority for this URI
1516 *
1517 * @exception MalformedURIException it authority is not a
1518 * well formed registry based authority
1519 */
1520 public void setRegBasedAuthority(String authority)
1521 throws MalformedURIException {
1522
1523 if (authority == null) {
1524 m_regAuthority = null;
1525 return;
1526 }
1527 // reg_name = 1*( unreserved | escaped | "$" | "," |
1528 // ";" | ":" | "@" | "&" | "=" | "+" )
1529 else if (authority.length() < 1 ||
1530 !isValidRegistryBasedAuthority(authority) ||
1531 authority.indexOf('/') != -1) {
1532 throw new MalformedURIException("Registry based authority is not well formed.");
1533 }
1534 m_regAuthority = authority;
1535 m_host = null;
1536 m_userinfo = null;
1537 m_port = -1;
1538 }
1539
1540 /**
1541 * Set the path for this URI. If the supplied path is null, then the
1542 * query string and fragment are set to null as well. If the supplied
1543 * path includes a query string and/or fragment, these fields will be
1544 * parsed and set as well. Note that, for URIs following the "generic
1545 * URI" syntax, the path specified should start with a slash.
1546 * For URIs that do not follow the generic URI syntax, this method
1547 * sets the scheme-specific part.
1548 *
1549 * @param p_path the path for this URI (may be null)
1550 *
1551 * @exception MalformedURIException if p_path contains invalid
1552 * characters
1553 */
1554 public void setPath(String p_path) throws MalformedURIException {
1555 if (p_path == null) {
1556 m_path = null;
1557 m_queryString = null;
1558 m_fragment = null;
1559 }
1560 else {
1561 initializePath(p_path, 0);
1562 }
1563 }
1564
1565 /**
1566 * Append to the end of the path of this URI. If the current path does
1567 * not end in a slash and the path to be appended does not begin with
1568 * a slash, a slash will be appended to the current path before the
1569 * new segment is added. Also, if the current path ends in a slash
1570 * and the new segment begins with a slash, the extra slash will be
1571 * removed before the new segment is appended.
1572 *
1573 * @param p_addToPath the new segment to be added to the current path
1574 *
1575 * @exception MalformedURIException if p_addToPath contains syntax
1576 * errors
1577 */
1578 public void appendPath(String p_addToPath)
1579 throws MalformedURIException {
1580 if (p_addToPath == null || p_addToPath.trim().length() == 0) {
1581 return;
1582 }
1583
1584 if (!isURIString(p_addToPath)) {
1585 throw new MalformedURIException(
1586 "Path contains invalid character!");
1587 }
1588
1589 if (m_path == null || m_path.trim().length() == 0) {
1590 if (p_addToPath.startsWith("/")) {
1591 m_path = p_addToPath;
1592 }
1593 else {
1594 m_path = "/" + p_addToPath;
1595 }
1596 }
1597 else if (m_path.endsWith("/")) {
1598 if (p_addToPath.startsWith("/")) {
1599 m_path = m_path.concat(p_addToPath.substring(1));
1600 }
1601 else {
1602 m_path = m_path.concat(p_addToPath);
1603 }
1604 }
1605 else {
1606 if (p_addToPath.startsWith("/")) {
1607 m_path = m_path.concat(p_addToPath);
1608 }
1609 else {
1610 m_path = m_path.concat("/" + p_addToPath);
1611 }
1612 }
1613 }
1614
1615 /**
1616 * Set the query string for this URI. A non-null value is valid only
1617 * if this is an URI conforming to the generic URI syntax and
1618 * the path value is not null.
1619 *
1620 * @param p_queryString the query string for this URI
1621 *
1622 * @exception MalformedURIException if p_queryString is not null and this
1623 * URI does not conform to the generic
1624 * URI syntax or if the path is null
1625 */
1626 public void setQueryString(String p_queryString) throws MalformedURIException {
1627 if (p_queryString == null) {
1628 m_queryString = null;
1629 }
1630 else if (!isGenericURI()) {
1631 throw new MalformedURIException(
1632 "Query string can only be set for a generic URI!");
1633 }
1634 else if (getPath() == null) {
1635 throw new MalformedURIException(
1636 "Query string cannot be set when path is null!");
1637 }
1638 else if (!isURIString(p_queryString)) {
1639 throw new MalformedURIException(
1640 "Query string contains invalid character!");
1641 }
1642 else {
1643 m_queryString = p_queryString;
1644 }
1645 }
1646
1647 /**
1648 * Set the fragment for this URI. A non-null value is valid only
1649 * if this is a URI conforming to the generic URI syntax and
1650 * the path value is not null.
1651 *
1652 * @param p_fragment the fragment for this URI
1653 *
1654 * @exception MalformedURIException if p_fragment is not null and this
1655 * URI does not conform to the generic
1656 * URI syntax or if the path is null
1657 */
1658 public void setFragment(String p_fragment) throws MalformedURIException {
1659 if (p_fragment == null) {
1660 m_fragment = null;
1661 }
1662 else if (!isGenericURI()) {
1663 throw new MalformedURIException(
1664 "Fragment can only be set for a generic URI!");
1665 }
1666 else if (getPath() == null) {
1667 throw new MalformedURIException(
1668 "Fragment cannot be set when path is null!");
1669 }
1670 else if (!isURIString(p_fragment)) {
1671 throw new MalformedURIException(
1672 "Fragment contains invalid character!");
1673 }
1674 else {
1675 m_fragment = p_fragment;
1676 }
1677 }
1678
1679 /**
1680 * Determines if the passed-in Object is equivalent to this URI.
1681 *
1682 * @param p_test the Object to test for equality.
1683 *
1684 * @return true if p_test is a URI with all values equal to this
1685 * URI, false otherwise
1686 */
1687 @Override
1688 public boolean equals(Object p_test) {
1689 if (p_test instanceof URI) {
1690 URI testURI = (URI) p_test;
1691 if (((m_scheme == null && testURI.m_scheme == null) ||
1692 (m_scheme != null && testURI.m_scheme != null &&
1693 m_scheme.equals(testURI.m_scheme))) &&
1694 ((m_userinfo == null && testURI.m_userinfo == null) ||
1695 (m_userinfo != null && testURI.m_userinfo != null &&
1696 m_userinfo.equals(testURI.m_userinfo))) &&
1697 ((m_host == null && testURI.m_host == null) ||
1698 (m_host != null && testURI.m_host != null &&
1699 m_host.equals(testURI.m_host))) &&
1700 m_port == testURI.m_port &&
1701 ((m_path == null && testURI.m_path == null) ||
1702 (m_path != null && testURI.m_path != null &&
1703 m_path.equals(testURI.m_path))) &&
1704 ((m_queryString == null && testURI.m_queryString == null) ||
1705 (m_queryString != null && testURI.m_queryString != null &&
1706 m_queryString.equals(testURI.m_queryString))) &&
1707 ((m_fragment == null && testURI.m_fragment == null) ||
1708 (m_fragment != null && testURI.m_fragment != null &&
1709 m_fragment.equals(testURI.m_fragment)))) {
1710 return true;
1711 }
1712 }
1713 return false;
1714 }
1715
1716 @Override
1717 public int hashCode() {
1718 int hash = 5;
1719 hash = 47 * hash + Objects.hashCode(this.m_scheme);
1720 hash = 47 * hash + Objects.hashCode(this.m_userinfo);
1721 hash = 47 * hash + Objects.hashCode(this.m_host);
1722 hash = 47 * hash + this.m_port;
1723 hash = 47 * hash + Objects.hashCode(this.m_path);
1724 hash = 47 * hash + Objects.hashCode(this.m_queryString);
1725 hash = 47 * hash + Objects.hashCode(this.m_fragment);
1726 return hash;
1727 }
1728
1729 /**
1730 * Get the URI as a string specification. See RFC 2396 Section 5.2.
1731 *
1732 * @return the URI string specification
1733 */
1734 @Override
1735 public String toString() {
1736 final StringBuilder uriSpecString = new StringBuilder();
1737
1738 if (m_scheme != null) {
1739 uriSpecString.append(m_scheme);
1740 uriSpecString.append(':');
1741 }
1742 uriSpecString.append(getSchemeSpecificPart());
1743 return uriSpecString.toString();
1744 }
1745
1746 /**
1747 * Get the indicator as to whether this URI uses the "generic URI"
1748 * syntax.
1749 *
1750 * @return true if this URI uses the "generic URI" syntax, false
1751 * otherwise
1752 */
1753 public boolean isGenericURI() {
1754 // presence of the host (whether valid or empty) means
1755 // double-slashes which means generic uri
1756 return (m_host != null);
1757 }
1758
1759 /**
1760 * Returns whether this URI represents an absolute URI.
1761 *
1762 * @return true if this URI represents an absolute URI, false
1763 * otherwise
1764 */
1765 public boolean isAbsoluteURI() {
1766 // presence of the scheme means absolute uri
1767 return (m_scheme != null);
1768 }
1769
1770 /**
1771 * Determine whether a scheme conforms to the rules for a scheme name.
1772 * A scheme is conformant if it starts with an alphanumeric, and
1773 * contains only alphanumerics, '+','-' and '.'.
1774 *
1775 * @return true if the scheme is conformant, false otherwise
1776 */
1777 public static boolean isConformantSchemeName(String p_scheme) {
1778 if (p_scheme == null || p_scheme.trim().length() == 0) {
1779 return false;
1780 }
1781
1782 if (!isAlpha(p_scheme.charAt(0))) {
1783 return false;
1784 }
1785
1786 char testChar;
1787 int schemeLength = p_scheme.length();
1788 for (int i = 1; i < schemeLength; ++i) {
1789 testChar = p_scheme.charAt(i);
1790 if (!isSchemeCharacter(testChar)) {
1791 return false;
1792 }
1793 }
1794
1795 return true;
1796 }
1797
1798 /**
1799 * Determine whether a string is syntactically capable of representing
1800 * a valid IPv4 address, IPv6 reference or the domain name of a network host.
1801 * A valid IPv4 address consists of four decimal digit groups separated by a
1802 * '.'. Each group must consist of one to three digits. See RFC 2732 Section 3,
1803 * and RFC 2373 Section 2.2, for the definition of IPv6 references. A hostname
1804 * consists of domain labels (each of which must begin and end with an alphanumeric
1805 * but may contain '-') separated & by a '.'. See RFC 2396 Section 3.2.2.
1806 *
1807 * @return true if the string is a syntactically valid IPv4 address,
1808 * IPv6 reference or hostname
1809 */
1810 public static boolean isWellFormedAddress(String address) {
1811 if (address == null) {
1812 return false;
1813 }
1814
1815 int addrLength = address.length();
1816 if (addrLength == 0) {
1817 return false;
1818 }
1819
1820 // Check if the host is a valid IPv6reference.
1821 if (address.startsWith("[")) {
1822 return isWellFormedIPv6Reference(address);
1823 }
1824
1825 // Cannot start with a '.', '-', or end with a '-'.
1826 if (address.startsWith(".") ||
1827 address.startsWith("-") ||
1828 address.endsWith("-")) {
1829 return false;
1830 }
1831
1832 // rightmost domain label starting with digit indicates IP address
1833 // since top level domain label can only start with an alpha
1834 // see RFC 2396 Section 3.2.2
1835 int index = address.lastIndexOf('.');
1836 if (address.endsWith(".")) {
1837 index = address.substring(0, index).lastIndexOf('.');
1838 }
1839
1840 if (index+1 < addrLength && isDigit(address.charAt(index+1))) {
1841 return isWellFormedIPv4Address(address);
1842 }
1843 else {
1844 // hostname = *( domainlabel "." ) toplabel [ "." ]
1845 // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
1846 // toplabel = alpha | alpha *( alphanum | "-" ) alphanum
1847
1848 // RFC 2396 states that hostnames take the form described in
1849 // RFC 1034 (Section 3) and RFC 1123 (Section 2.1). According
1850 // to RFC 1034, hostnames are limited to 255 characters.
1851 if (addrLength > 255) {
1852 return false;
1853 }
1854
1855 // domain labels can contain alphanumerics and '-"
1856 // but must start and end with an alphanumeric
1857 char testChar;
1858 int labelCharCount = 0;
1859
1860 for (int i = 0; i < addrLength; i++) {
1861 testChar = address.charAt(i);
1862 if (testChar == '.') {
1863 if (!isAlphanum(address.charAt(i-1))) {
1864 return false;
1865 }
1866 if (i+1 < addrLength && !isAlphanum(address.charAt(i+1))) {
1867 return false;
1868 }
1869 labelCharCount = 0;
1870 }
1871 else if (!isAlphanum(testChar) && testChar != '-') {
1872 return false;
1873 }
1874 // RFC 1034: Labels must be 63 characters or less.
1875 else if (++labelCharCount > 63) {
1876 return false;
1877 }
1878 }
1879 }
1880 return true;
1881 }
1882
1883 /**
1884 * <p>Determines whether a string is an IPv4 address as defined by
1885 * RFC 2373, and under the further constraint that it must be a 32-bit
1886 * address. Though not expressed in the grammar, in order to satisfy
1887 * the 32-bit address constraint, each segment of the address cannot
1888 * be greater than 255 (8 bits of information).</p>
1889 *
1890 * <p><code>IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT</code></p>
1891 *
1892 * @return true if the string is a syntactically valid IPv4 address
1893 */
1894 public static boolean isWellFormedIPv4Address(String address) {
1895
1896 int addrLength = address.length();
1897 char testChar;
1898 int numDots = 0;
1899 int numDigits = 0;
1900
1901 // make sure that 1) we see only digits and dot separators, 2) that
1902 // any dot separator is preceded and followed by a digit and
1903 // 3) that we find 3 dots
1904 //
1905 // RFC 2732 amended RFC 2396 by replacing the definition
1906 // of IPv4address with the one defined by RFC 2373. - mrglavas
1907 //
1908 // IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
1909 //
1910 // One to three digits must be in each segment.
1911 for (int i = 0; i < addrLength; i++) {
1912 testChar = address.charAt(i);
1913 if (testChar == '.') {
1914 if ((i > 0 && !isDigit(address.charAt(i-1))) ||
1915 (i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
1916 return false;
1917 }
1918 numDigits = 0;
1919 if (++numDots > 3) {
1920 return false;
1921 }
1922 }
1923 else if (!isDigit(testChar)) {
1924 return false;
1925 }
1926 // Check that that there are no more than three digits
1927 // in this segment.
1928 else if (++numDigits > 3) {
1929 return false;
1930 }
1931 // Check that this segment is not greater than 255.
1932 else if (numDigits == 3) {
1933 char first = address.charAt(i-2);
1934 char second = address.charAt(i-1);
1935 if (!(first < '2' ||
1936 (first == '2' &&
1937 (second < '5' ||
1938 (second == '5' && testChar <= '5'))))) {
1939 return false;
1940 }
1941 }
1942 }
1943 return (numDots == 3);
1944 }
1945
1946 /**
1947 * <p>Determines whether a string is an IPv6 reference as defined
1948 * by RFC 2732, where IPv6address is defined in RFC 2373. The
1949 * IPv6 address is parsed according to Section 2.2 of RFC 2373,
1950 * with the additional constraint that the address be composed of
1951 * 128 bits of information.</p>
1952 *
1953 * <p><code>IPv6reference = "[" IPv6address "]"</code></p>
1954 *
1955 * <p>Note: The BNF expressed in RFC 2373 Appendix B does not
1956 * accurately describe section 2.2, and was in fact removed from
1957 * RFC 3513, the successor of RFC 2373.</p>
1958 *
1959 * @return true if the string is a syntactically valid IPv6 reference
1960 */
1961 public static boolean isWellFormedIPv6Reference(String address) {
1962
1963 int addrLength = address.length();
1964 int index = 1;
1965 int end = addrLength-1;
1966
1967 // Check if string is a potential match for IPv6reference.
1968 if (!(addrLength > 2 && address.charAt(0) == '['
1969 && address.charAt(end) == ']')) {
1970 return false;
1971 }
1972
1973 // Counter for the number of 16-bit sections read in the address.
1974 int [] counter = new int[1];
1975
1976 // Scan hex sequence before possible '::' or IPv4 address.
1977 index = scanHexSequence(address, index, end, counter);
1978 if (index == -1) {
1979 return false;
1980 }
1981 // Address must contain 128-bits of information.
1982 else if (index == end) {
1983 return (counter[0] == 8);
1984 }
1985
1986 if (index+1 < end && address.charAt(index) == ':') {
1987 if (address.charAt(index+1) == ':') {
1988 // '::' represents at least one 16-bit group of zeros.
1989 if (++counter[0] > 8) {
1990 return false;
1991 }
1992 index += 2;
1993 // Trailing zeros will fill out the rest of the address.
1994 if (index == end) {
1995 return true;
1996 }
1997 }
1998 // If the second character wasn't ':', in order to be valid,
1999 // the remainder of the string must match IPv4Address,
2000 // and we must have read exactly 6 16-bit groups.
2001 else {
2002 return (counter[0] == 6) &&
2003 isWellFormedIPv4Address(address.substring(index+1, end));
2004 }
2005 }
2006 else {
2007 return false;
2008 }
2009
2010 // 3. Scan hex sequence after '::'.
2011 int prevCount = counter[0];
2012 index = scanHexSequence(address, index, end, counter);
2013
2014 // We've either reached the end of the string, the address ends in
2015 // an IPv4 address, or it is invalid. scanHexSequence has already
2016 // made sure that we have the right number of bits.
2017 return (index == end) ||
2018 (index != -1 && isWellFormedIPv4Address(
2019 address.substring((counter[0] > prevCount) ? index+1 : index, end)));
2020 }
2021
2022 /**
2023 * Helper method for isWellFormedIPv6Reference which scans the
2024 * hex sequences of an IPv6 address. It returns the index of the
2025 * next character to scan in the address, or -1 if the string
2026 * cannot match a valid IPv6 address.
2027 *
2028 * @param address the string to be scanned
2029 * @param index the beginning index (inclusive)
2030 * @param end the ending index (exclusive)
2031 * @param counter a counter for the number of 16-bit sections read
2032 * in the address
2033 *
2034 * @return the index of the next character to scan, or -1 if the
2035 * string cannot match a valid IPv6 address
2036 */
2037 private static int scanHexSequence (String address, int index, int end, int [] counter) {
2038
2039 char testChar;
2040 int numDigits = 0;
2041 int start = index;
2042
2043 // Trying to match the following productions:
2044 // hexseq = hex4 *( ":" hex4)
2045 // hex4 = 1*4HEXDIG
2046 for (; index < end; ++index) {
2047 testChar = address.charAt(index);
2048 if (testChar == ':') {
2049 // IPv6 addresses are 128-bit, so there can be at most eight sections.
2050 if (numDigits > 0 && ++counter[0] > 8) {
2051 return -1;
2052 }
2053 // This could be '::'.
2054 if (numDigits == 0 || ((index+1 < end) && address.charAt(index+1) == ':')) {
2055 return index;
2056 }
2057 numDigits = 0;
2058 }
2059 // This might be invalid or an IPv4address. If it's potentially an IPv4address,
2060 // backup to just after the last valid character that matches hexseq.
2061 else if (!isHex(testChar)) {
2062 if (testChar == '.' && numDigits < 4 && numDigits > 0 && counter[0] <= 6) {
2063 int back = index - numDigits - 1;
2064 return (back >= start) ? back : (back+1);
2065 }
2066 return -1;
2067 }
2068 // There can be at most 4 hex digits per group.
2069 else if (++numDigits > 4) {
2070 return -1;
2071 }
2072 }
2073 return (numDigits > 0 && ++counter[0] <= 8) ? end : -1;
2074 }
2075
2076
2077 /**
2078 * Determine whether a char is a digit.
2079 *
2080 * @return true if the char is betweeen '0' and '9', false otherwise
2081 */
2082 private static boolean isDigit(char p_char) {
2083 return p_char >= '0' && p_char <= '9';
2084 }
2085
2086 /**
2087 * Determine whether a character is a hexadecimal character.
2088 *
2089 * @return true if the char is betweeen '0' and '9', 'a' and 'f'
2090 * or 'A' and 'F', false otherwise
2091 */
2092 private static boolean isHex(char p_char) {
2093 return (p_char <= 'f' && (fgLookupTable[p_char] & ASCII_HEX_CHARACTERS) != 0);
2094 }
2095
2096 /**
2097 * Determine whether a char is an alphabetic character: a-z or A-Z
2098 *
2099 * @return true if the char is alphabetic, false otherwise
2100 */
2101 private static boolean isAlpha(char p_char) {
2102 return ((p_char >= 'a' && p_char <= 'z') || (p_char >= 'A' && p_char <= 'Z' ));
2103 }
2104
2105 /**
2106 * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z
2107 *
2108 * @return true if the char is alphanumeric, false otherwise
2109 */
2110 private static boolean isAlphanum(char p_char) {
2111 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_ALPHA_NUMERIC) != 0);
2112 }
2113
2114 /**
2115 * Determine whether a character is a reserved character:
2116 * ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '[', or ']'
2117 *
2118 * @return true if the string contains any reserved characters
2119 */
2120 private static boolean isReservedCharacter(char p_char) {
2121 return (p_char <= ']' && (fgLookupTable[p_char] & RESERVED_CHARACTERS) != 0);
2122 }
2123
2124 /**
2125 * Determine whether a char is an unreserved character.
2126 *
2127 * @return true if the char is unreserved, false otherwise
2128 */
2129 private static boolean isUnreservedCharacter(char p_char) {
2130 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_UNRESERVED_MASK) != 0);
2131 }
2132
2133 /**
2134 * Determine whether a char is a URI character (reserved or
2135 * unreserved, not including '%' for escaped octets).
2136 *
2137 * @return true if the char is a URI character, false otherwise
2138 */
2139 private static boolean isURICharacter (char p_char) {
2140 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_URI_CHARACTER) != 0);
2141 }
2142
2143 /**
2144 * Determine whether a char is a scheme character.
2145 *
2146 * @return true if the char is a scheme character, false otherwise
2147 */
2148 private static boolean isSchemeCharacter (char p_char) {
2149 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_SCHEME_CHARACTER) != 0);
2150 }
2151
2152 /**
2153 * Determine whether a char is a userinfo character.
2154 *
2155 * @return true if the char is a userinfo character, false otherwise
2156 */
2157 private static boolean isUserinfoCharacter (char p_char) {
2158 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_USERINFO_CHARACTER) != 0);
2159 }
2160
2161 /**
2162 * Determine whether a char is a path character.
2163 *
2164 * @return true if the char is a path character, false otherwise
2165 */
2166 private static boolean isPathCharacter (char p_char) {
2167 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_PATH_CHARACTER) != 0);
2168 }
2169
2170
2171 /**
2172 * Determine whether a given string contains only URI characters (also
2173 * called "uric" in RFC 2396). uric consist of all reserved
2174 * characters, unreserved characters and escaped characters.
2175 *
2176 * @return true if the string is comprised of uric, false otherwise
2177 */
2178 private static boolean isURIString(String p_uric) {
2179 if (p_uric == null) {
2180 return false;
2181 }
2182 int end = p_uric.length();
2183 char testChar = '\0';
2184 for (int i = 0; i < end; i++) {
2185 testChar = p_uric.charAt(i);
2186 if (testChar == '%') {
2187 if (i+2 >= end ||
2188 !isHex(p_uric.charAt(i+1)) ||
2189 !isHex(p_uric.charAt(i+2))) {
2190 return false;
2191 }
2192 else {
2193 i += 2;
2194 continue;
2195 }
2196 }
2197 if (isURICharacter(testChar)) {
2198 continue;
2199 }
2200 else {
2201 return false;
2202 }
2203 }
2204 return true;
2205 }
2206 }