Examples of org.apache.xmlbeans.impl.regex.RegularExpression$Context

org.apache.xmlbeans.impl.regex.RegularExpression

can refer captured texts with methods of the Match class. }

Case-insensitive matching

 RegularExpression re = new RegularExpression(regex, "i"); if (re.matches(text) >= 0) { ...}

Options

You can specify options to RegularExpression(regex, options) or setPattern(regex, options). This options parameter consists of the following characters.

"i": This option indicates case-insensitive matching.
"m": ^ and $ consider the EOL characters within the text.
"s": . matches any one character.
"u": Redefines \d \D \w \W \s \S \b \B \< \> as becoming to Unicode.
"w": By this option, \b \B \< \> are processed with the method of 'Unicode Regular Expression Guidelines' Revision 4. When "w" and "u" are specified at the same time, \b \B \< \> are processed for the "w" option.
",": The parser treats a comma in a character class as a range separator. [a,b] matches a or , or b without this option. [a,b] matches a or b with this option.
"X": By this option, the engine confoms to XML Schema: Regular Expression. The match() method does not do subsring matching but entire string matching.

Syntax

Differences from the Perl 5 regular expression

There is 6-digit hexadecimal character representation (\u005cvHHHHHH.)
Supports subtraction, union, and intersection operations for character classes.
Not supported: \ooo (Octal character representations), \G, \C, \lc, \u005c uc, \L, \U, \E, \Q, \N{name}, (?{code}), (??{code})

Meta characters are `. * + ? { [ ( ) | \ ^ $'.

Character

. (A period)
Matches any one character except the following characters.
LINE FEED (U+000A), CARRIAGE RETURN (U+000D), PARAGRAPH SEPARATOR (U+2029), LINE SEPARATOR (U+2028)
This expression matches one code point in Unicode. It can match a pair of surrogates.
When the "s" option is specified, it matches any character including the above four characters.
\e \f \n \r \t
Matches ESCAPE (U+001B), FORM FEED (U+000C), LINE FEED (U+000A), CARRIAGE RETURN (U+000D), HORIZONTAL TABULATION (U+0009)
\cC
Matches a control character. The C must be one of '@', 'A'-'Z', '[', '\u005c', ']', '^', '_'. It matches a control character of which the character code is less than the character code of the C by 0x0040.
For example, a \cJ matches a LINE FEED (U+000A), and a \c[ matches an ESCAPE (U+001B).
a non-meta character
Matches the character.
\ + a meta character
Matches the meta character.
\u005cxHH \u005cx{HHHH}
Matches a character of which code point is HH (Hexadecimal) in Unicode. You can write just 2 digits for \u005cxHH, and variable length digits for \u005cx{HHHH}.
\u005cvHHHHHH
Matches a character of which code point is HHHHHH (Hexadecimal) in Unicode.
\g
Matches a grapheme.
It is equivalent to (?[\p{ASSIGNED}]-[\p{M}\p{C}])?(?:\p{M}|[\x{094D}\x{09CD}\x{0A4D}\x{0ACD}\x{0B3D}\x{0BCD}\x{0C4D}\x{0CCD}\x{0D4D}\x{0E3A}\x{0F84}]\p{L}|[\x{1160}-\x{11A7}]|[\x{11A8}-\x{11FF}]|[\x{FF9E}\x{FF9F}])*
\X
Matches a combining character sequence. It is equivalent to (?:\PM\pM*)
Character class
+ *
[R₁R₂...R_n] (without "," option) + *
[R₁,R₂,...,R_n] (with "," option)
Positive character class. It matches a character in ranges.
R_n:
- A character (including \e \f \n \r \t \u005cxHH \u005cx{HHHH} \u005cvHHHHHH)
  This range matches the character.
- C₁-C₂
  This range matches a character which has a code point that is >= C₁'s code point and <= C₂'s code point. + *
- A POSIX character class: [:alpha:] [:alnum:] [:ascii:] [:cntrl:] [:digit:] [:graph:] [:lower:] [:print:] [:punct:] [:space:] [:upper:] [:xdigit:], + * and negative POSIX character classes in Perl like [:^alpha:]
  ...
- \d \D \s \S \w \W \p{name} \P{name}
  These expressions specifies the same ranges as the following expressions.
Enumerated ranges are merged (union operation). [a-ec-z] is equivalent to [a-z]
[^R₁R₂...R_n] (without a "," option)
[^R₁,R₂,...,R_n] (with a "," option)
Negative character class. It matches a character not in ranges.
(?[ranges]op[ranges]op[ranges] ... ) (op is - or + or &.)
Subtraction or union or intersection for character classes.
For exmaple, (?[A-Z]-[CF]) is equivalent to [A-BD-EG-Z], and (?[0x00-0x7f]-[K]&[\p{Lu}]) is equivalent to [A-JL-Z].
The result of this operations is a positive character class even if an expression includes any negative character classes. You have to take care on this in case-insensitive matching. For instance, (?[^b]) is equivalent to [\x00-ac-\x{10ffff}], which is equivalent to [^b] in case-sensitive matching. But, in case-insensitive matching, (?[^b]) matches any character because it includes 'B' and 'B' matches 'b' though [^b] is processed as [^Bb].
[R₁R₂...-[R_nR_n+1...]] (with an "X" option)

Character class subtraction for the XML Schema. You can use this syntax when you specify an "X" option.
\d
Equivalent to [0-9].
When a "u" option is set, it is equivalent to \p{Nd}.
\D
Equivalent to [^0-9]
When a "u" option is set, it is equivalent to \P{Nd}.
\s
Equivalent to [ \f\n\r\t]
When a "u" option is set, it is equivalent to [ \f\n\r\t\p{Z}].
\S
Equivalent to [^ \f\n\r\t]
When a "u" option is set, it is equivalent to [^ \f\n\r\t\p{Z}].
\w
Equivalent to [a-zA-Z0-9_]
When a "u" option is set, it is equivalent to [\p{Lu}\p{Ll}\p{Lo}\p{Nd}_].
\W
Equivalent to [^a-zA-Z0-9_]
When a "u" option is set, it is equivalent to [^\p{Lu}\p{Ll}\p{Lo}\p{Nd}_].
\p{name}
Matches one character in the specified General Category (the second field in UnicodeData.txt) or the specified Block. The following names are available:

Unicode General Categories:
L, M, N, Z, C, P, S, Lu, Ll, Lt, Lm, Lo, Mn, Me, Mc, Nd, Nl, No, Zs, Zl, Zp, Cc, Cf, Cn, Co, Cs, Pd, Ps, Pe, Pc, Po, Sm, Sc, Sk, So,
(Currently the Cn category includes U+10000-U+10FFFF characters)
Unicode Blocks:
Basic Latin, Latin-1 Supplement, Latin Extended-A, Latin Extended-B, IPA Extensions, Spacing Modifier Letters, Combining Diacritical Marks, Greek, Cyrillic, Armenian, Hebrew, Arabic, Devanagari, Bengali, Gurmukhi, Gujarati, Oriya, Tamil, Telugu, Kannada, Malayalam, Thai, Lao, Tibetan, Georgian, Hangul Jamo, Latin Extended Additional, Greek Extended, General Punctuation, Superscripts and Subscripts, Currency Symbols, Combining Marks for Symbols, Letterlike Symbols, Number Forms, Arrows, Mathematical Operators, Miscellaneous Technical, Control Pictures, Optical Character Recognition, Enclosed Alphanumerics, Box Drawing, Block Elements, Geometric Shapes, Miscellaneous Symbols, Dingbats, CJK Symbols and Punctuation, Hiragana, Katakana, Bopomofo, Hangul Compatibility Jamo, Kanbun, Enclosed CJK Letters and Months, CJK Compatibility, CJK Unified Ideographs, Hangul Syllables, High Surrogates, High Private Use Surrogates, Low Surrogates, Private Use, CJK Compatibility Ideographs, Alphabetic Presentation Forms, Arabic Presentation Forms-A, Combining Half Marks, CJK Compatibility Forms, Small Form Variants, Arabic Presentation Forms-B, Specials, Halfwidth and Fullwidth Forms
Others:
ALL (Equivalent to [\u005cu0000-\u005cv10FFFF])
ASSGINED (\p{ASSIGNED} is equivalent to \P{Cn})
UNASSGINED (\p{UNASSIGNED} is equivalent to \p{Cn})

\P{name}
Matches one character not in the specified General Category or the specified Block.
Selection and Quantifier

X|Y
...
X*
Matches 0 or more X.
X+
Matches 1 or more X.
X?
Matches 0 or 1 X.
X{number}
Matches number times.
X{min,}
...
X{min,max}
...
X*?
X+?
X??
X{min,}?
X{min,max}?
Non-greedy matching.
Grouping, Capturing, and Back-reference
(?:X)
Grouping. "foo+" matches "foo" or "foooo". If you want it matches "foofoo" or "foofoofoo", you have to write "(?:foo)+".
(X)
Grouping with capturing. It make a group and applications can know where in target text a group matched with methods of a Match instance after matches(String,Match). The 0th group means whole of this regular expression. The Nth gorup is the inside of the Nth left parenthesis.
For instance, a regular expression is " *([^<:]*) +<([^>]*)> *" and target text is "From: TAMURA Kent <kent@trl.ibm.co.jp>":
- Match.getCapturedText(0): " TAMURA Kent <kent@trl.ibm.co.jp>"
- Match.getCapturedText(1): "TAMURA Kent"
- Match.getCapturedText(2): "kent@trl.ibm.co.jp"
\1 \2 \3 \4 \5 \6 \7 \8 \9

(?>X)
Independent expression group. ................
(?options:X)
(?options-options2:X)
............................
The options or the options2 consists of 'i' 'm' 's' 'w'. Note that it can not contain 'u'.
(?options)
(?options-options2)
......
These expressions must be at the beginning of a group.
Anchor

\A
Matches the beginnig of the text.
\Z
Matches the end of the text, or before an EOL character at the end of the text, or CARRIAGE RETURN + LINE FEED at the end of the text.
\z
Matches the end of the text.
^
Matches the beginning of the text. It is equivalent to \A.
When a "m" option is set, it matches the beginning of the text, or after one of EOL characters ( LINE FEED (U+000A), CARRIAGE RETURN (U+000D), LINE SEPARATOR (U+2028), PARAGRAPH SEPARATOR (U+2029).)
$
Matches the end of the text, or before an EOL character at the end of the text, or CARRIAGE RETURN + LINE FEED at the end of the text.
When a "m" option is set, it matches the end of the text, or before an EOL character.
\b
Matches word boundary. (See a "w" option)
\B
Matches non word boundary. (See a "w" option)
\<
Matches the beginning of a word. (See a "w" option)
\>
Matches the end of a word. (See a "w" option)
Lookahead and lookbehind

(?=X)
Lookahead.
(?!X)
Negative lookahead.
(?<=X)
Lookbehind.
(Note for text capturing......)
(?<!X)
Negative lookbehind.
Misc.

(?(condition)yes-pattern|no-pattern),
(?(condition)yes-pattern)
......
(?#comment)
Comment. A comment string consists of characters except ')'. You can not write comments in character classes and before quantifiers.

BNF for the regular expression

 regex ::= ('(?' options ')')? term ('|' term) term ::= factor+ factor ::= anchors | atom (('*' | '+' | '?' | minmax ) '?'? )? | '(?#' [^)]* ')' minmax ::= '{' ([0-9]+ | [0-9]+ ',' | ',' [0-9]+ | [0-9]+ ',' [0-9]+) '}' atom ::= char | '.' | char-class | '(' regex ')' | '(?:' regex ')' | '\' [0-9] | '\w' | '\W' | '\d' | '\D' | '\s' | '\S' | category-block | '\X' | '(?>' regex ')' | '(?' options ':' regex ')' | '(?' ('(' [0-9] ')' | '(' anchors ')' | looks) term ('|' term)? ')' options ::= [imsw]* ('-' [imsw]+)? anchors ::= '^' | '$' | '\A' | '\Z' | '\z' | '\b' | '\B' | '\<' | '\>' looks ::= '(?=' regex ')'  | '(?!' regex ')' | '(?<=' regex ')' | '(?<!' regex ')' char ::= '\\' | '\' [efnrtv] | '\c' [@-_] | code-point | character-1 category-block ::= '\' [pP] category-symbol-1 | ('\p{' | '\P{') (category-symbol | block-name | other-properties) '}' category-symbol-1 ::= 'L' | 'M' | 'N' | 'Z' | 'C' | 'P' | 'S' category-symbol ::= category-symbol-1 | 'Lu' | 'Ll' | 'Lt' | 'Lm' | Lo' | 'Mn' | 'Me' | 'Mc' | 'Nd' | 'Nl' | 'No' | 'Zs' | 'Zl' | 'Zp' | 'Cc' | 'Cf' | 'Cn' | 'Co' | 'Cs' | 'Pd' | 'Ps' | 'Pe' | 'Pc' | 'Po' | 'Sm' | 'Sc' | 'Sk' | 'So' block-name ::= (See above) other-properties ::= 'ALL' | 'ASSIGNED' | 'UNASSIGNED' character-1 ::= (any character except meta-characters) char-class ::= '[' ranges ']' | '(?[' ranges ']' ([-+&] '[' ranges ']')? ')' ranges ::= '^'? (range ','?)+ range ::= '\d' | '\w' | '\s' | '\D' | '\W' | '\S' | category-block | range-char | range-char '-' range-char range-char ::= '\[' | '\]' | '\\' | '\' [,-efnrtv] | code-point | character-2 code-point ::= '\x' hex-char hex-char | '\x{' hex-char+ '}'                | '\v' hex-char hex-char hex-char hex-char hex-char hex-char hex-char ::= [0-9a-fA-F] character-2 ::= (any character except \[]-,)

TODO

Unicode Regular Expression Guidelines
- 2.4 Canonical Equivalents
- Level 3
Parsing performance

@author TAMURA Kent <kent@trl.ibm.co.jp> @version $Id: RegularExpression.java,v 1.4 2004/02/12 20:05:55 ericvas Exp $

     * </ul>
     */
    public static void execute(final String uri, final Evaluator evaluator) {
        try {
            String documentURI = getCanonicalURI(uri);
            Context rootCtx = evaluator.newContext(null);
            Tracer trc = new Tracer();
            SCXML doc = SCXMLReader.read(new URL(documentURI));
            if (doc == null) {
                System.err.println("The SCXML document " + uri
                        + " can not be parsed!");
                System.exit(-1);
            }
            System.out.println(SCXMLWriter.write(doc));
            SCXMLExecutor exec = new SCXMLExecutor(evaluator, null, trc);
            EventDispatcher ed = new SimpleScheduler(exec);
            exec.setEventdispatcher(ed);
            exec.setStateMachine(doc);
            exec.addListener(doc, trc);
            exec.registerInvokerClass("scxml", SimpleSCXMLInvoker.class);
            exec.setRootContext(rootCtx);
            exec.go();
            BufferedReader br = new BufferedReader(new
                InputStreamReader(System.in));
            String event;
            while ((event = br.readLine()) != null) {
                event = event.trim();
                if (event.equalsIgnoreCase("help") || event.equals("?")) {
                    System.out.println("Enter a space-separated list of "
                        + "events");
                    System.out.println("To populate a variable in the "
                        + "current context, type \"name=value\"");
                    System.out.println("To quit, enter \"quit\"");
                    System.out.println("To reset state machine, enter "
                        + "\"reset\"");
                } else if (event.equalsIgnoreCase("quit")) {
                    break;
                } else if (event.equalsIgnoreCase("reset")) {
                    exec.reset();
                } else if (event.indexOf('=') != -1) {
                    int marker = event.indexOf('=');
                    String name = event.substring(0, marker);
                    String value = event.substring(marker + 1);
                    rootCtx.setLocal(name, value);
                    System.out.println("Set variable " + name + " to "
                        + value);
                } else if (event == null || event.trim().length() == 0
                           || event.equalsIgnoreCase("null")) {
                    TriggerEvent[] evts = {new TriggerEvent(null,

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        else if (!transition.isNoEventsTransition()) {
            return false;
        }
        if (transition.getCond() != null) {
            Boolean result = Boolean.FALSE;
            Context context = exctx.getScInstance().getContext(transition.getParent());
            context.setLocal(Context.NAMESPACES_KEY, transition.getNamespaces());
            try {
                if ((result = exctx.getEvaluator().evalCond(context, transition.getCond())) == null) {
                    result = Boolean.FALSE;
                    if (exctx.getAppLog().isDebugEnabled()) {
                        exctx.getAppLog().debug("Treating as false because the cond expression was evaluated as null: '"
                                + transition.getCond() + "'");
                    }
                }
            }
            catch (SCXMLExpressionException e) {
                exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, "Treating as false due to error: "
                        + e.getMessage(), transition);
            }
            finally {
                context.setLocal(Context.NAMESPACES_KEY, null);
            }
            return result;
        }
        return true;
    }

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     * @param scInstance the state machine instance holding the system context
     * @param event The event being stored
     * @param internal Flag indicating the event was received internally or externally
     */
    public void setSystemEventVariable(final SCInstance scInstance, final TriggerEvent event, boolean internal) {
        Context systemContext = scInstance.getSystemContext();
        EventVariable eventVar = null;
        if (event != null) {
            String eventType = internal ? EventVariable.TYPE_INTERNAL : EventVariable.TYPE_EXTERNAL;


            final int triggerEventType = event.getType();
            if (triggerEventType == TriggerEvent.ERROR_EVENT || triggerEventType == TriggerEvent.CHANGE_EVENT) {
                eventType = EventVariable.TYPE_PLATFORM;
            }


            // TODO: determine sendid, origin, originType and invokeid based on context later.
            eventVar = new EventVariable(event.getName(), eventType, null, null, null, null, event.getPayload());
        }
        systemContext.setLocal(SCXMLSystemContext.EVENT_KEY, eventVar);
    }

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        Evaluator eval = exctx.getEvaluator();
        for (TransitionalState ts : statesToInvoke) {
            if (ts.getInvokes().isEmpty()) {
                continue;
            }
            Context context = scInstance.getContext(ts);
            for (Invoke i : ts.getInvokes()) {
                String src = i.getSrc();
                if (src == null) {
                    String srcexpr = i.getSrcexpr();
                    Object srcObj;
                    try {
                        context.setLocal(Context.NAMESPACES_KEY, i.getNamespaces());
                        srcObj = eval.eval(context, srcexpr);
                        context.setLocal(Context.NAMESPACES_KEY, null);
                        src = String.valueOf(srcObj);
                    } catch (SCXMLExpressionException see) {
                        exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                        exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                    }
                }
                String source = src;
                PathResolver pr = i.getPathResolver();
                if (pr != null) {
                    source = i.getPathResolver().resolvePath(src);
                }
                Invoker inv;
                try {
                    inv = exctx.newInvoker(i.getType());
                } catch (InvokerException ie) {
                    exctx.getInternalIOProcessor().addEvent(new TriggerEvent("failed.invoke."+ts.getId(), TriggerEvent.ERROR_EVENT));
                    continue;
                }
                List<Param> params = i.params();
                Map<String, Object> args = new HashMap<String, Object>();
                for (Param p : params) {
                    String argExpr = p.getExpr();
                    Object argValue = null;
                    context.setLocal(Context.NAMESPACES_KEY, p.getNamespaces());
                    // Do we have an "expr" attribute?
                    if (argExpr != null && argExpr.trim().length() > 0) {
                        try {
                            argValue = eval.eval(context, argExpr);
                        } catch (SCXMLExpressionException see) {
                            exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                            exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                        }
                    } else {
                        // No. Does value of "name" attribute refer to a valid
                        // location in the data model?
                        try {
                            argValue = eval.evalLocation(context, p.getName());
                            if (argValue == null) {
                                // Generate error, 4.3.1 in WD-scxml-20080516
                                exctx.getInternalIOProcessor().addEvent(new TriggerEvent(ts.getId() + ERR_ILLEGAL_ALLOC, TriggerEvent.ERROR_EVENT));
                            }
                        } catch (SCXMLExpressionException see) {
                            exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                            exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                        }
                    }
                    context.setLocal(Context.NAMESPACES_KEY, null);
                    args.put(p.getName(), argValue);
                }
                String invokeId = exctx.setInvoker(i, inv);
                inv.setInvokeId(invokeId);
                inv.setParentIOProcessor(exctx.getExternalIOProcessor());

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                            enumeratedValues = new ArrayList();
                        enumeratedValues.add(enumval);
                        break;


                    case SchemaType.FACET_PATTERN:
                        RegularExpression p;
                        try { p = new RegularExpression(facet.getValue().getStringValue(), "X"); }
                        catch (org.apache.xmlbeans.impl.regex.ParseException e)
                        {
                            state.error("Malformed regular expression", XmlErrorContext.FACET_VALUE_MALFORMED, facet);
                            continue;
                        }

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    }




    public static boolean matches(String source, String pattern)
    {
        RegularExpression re = new RegularExpression(pattern);
        return re.matches(source);
    }

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     * Behaves exactly like JDK 1.4 String.split()
     */
    public static String[] split(String source, String delimPattern)
    {
        ArrayList result = new ArrayList(3);
        RegularExpression re = new RegularExpression(delimPattern);
        Match matcher = new Match();


        if (re.matches(source, matcher))
        {
            int groups = matcher.getNumberOfGroups();
            int start = 0;
            for (int i = 0; i < groups; i++)
            {

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    /**
     * Behaves exactly like JDK 1.4's String.replaceAll()
     */
    public static String replaceAll(String source, String pattern, String replace)
    {
        RegularExpression re = new RegularExpression(pattern);
        Match matcher = new Match();


        if (re.matches(source, matcher))
        {
            StringBuffer sb = new StringBuffer(source);
            replaceAll(matcher, sb, replace);


            return new String(sb);

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                    toPackage += sep;


                toPackage += to.get( j );
            }


            _fromPatterns[ off + i ] = new RegularExpression( pattern );
            _toPackageNames[ off + i ] = toPackage;
        }
    }

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        _fromPackages = _repackager.getFromPackages();
        _toPackages = _repackager.getToPackages();


        _packagePattern =
            new RegularExpression( "^\\s*package\\s+((?:\\w|\\.)*)\\s*;", "m");


        _moveAlongFiles = new ArrayList();
        _movedDirs = new HashMap();


        File currentDir   = new File( "." );

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