Examples of net.percederberg.grammatica.parser.re.RegExpException

Package net.percederberg.grammatica.parser.re

Examples of net.percederberg.grammatica.parser.re.RegExpException

net.percederberg.grammatica.parser.re.RegExpException
A regular expression exception. This exception is thrown if a regular expression couldn't be processed (or "compiled") properly. @author Per Cederberg, @version 1.0

        this.pattern = pattern;
        this.ignoreCase = ignoreCase;
        this.pos = 0;
        this.end = parseExpr(start);
        if (pos < pattern.length()) {
            throw new RegExpException(
                RegExpException.UNEXPECTED_CHARACTER,
                pos,
                pattern);
        }
    }

View Full Code Here

        case '}':
        case '?':
        case '*':
        case '+':
        case '|':
            throw new RegExpException(
                RegExpException.UNEXPECTED_CHARACTER,
                pos,
                pattern);
        default:
            return parseChar(start);

View Full Code Here

                    max = readNumber();
                }
            }
            readChar('}');
            if (max == 0 || (max > 0 && min > max)) {
                throw new RegExpException(
                    RegExpException.INVALID_REPEAT_COUNT,
                    firstPos,
                    pattern);
            }
            break;
        default:
            throw new RegExpException(
                RegExpException.UNEXPECTED_CHARACTER,
                pos - 1,
                pattern);
        }


        // Read possessive or reluctant modifiers
        if (peekChar(0) == '?') {
            throw new RegExpException(
                RegExpException.UNSUPPORTED_SPECIAL_CHARACTER,
                pos,
                pattern);
        } else if (peekChar(0) == '+') {
            throw new RegExpException(
                RegExpException.UNSUPPORTED_SPECIAL_CHARACTER,
                pos,
                pattern);
        }


        // Handle supported repeaters
        if (min == 0 && max == 1) {
            return start.addOut(new TokenNFA.EpsilonTransition(end));
        } else if (min == 0 && max == -1) {
            if (end.outgoing.length == 0) {
                end.mergeInto(start);
            } else {
                end.addOut(new TokenNFA.EpsilonTransition(start));
            }
            return start;
        } else if (min == 1 && max == -1) {
            if (start.outgoing.length == 1 &&
                end.outgoing.length == 0 &&
                end.incoming.length == 1 &&
                start.outgoing[0] == end.incoming[0]) {


                end.addOut(start.outgoing[0].copy(end));
            } else {
                end.addOut(new TokenNFA.EpsilonTransition(start));
            }
            return end;
        } else {
            throw new RegExpException(
                RegExpException.INVALID_REPEAT_COUNT,
                firstPos,
                pattern);
        }
    }

View Full Code Here

        switch (peekChar(0)) {
        case '\\':
            return parseEscapeChar(start);
        case '^':
        case '$':
            throw new RegExpException(
                RegExpException.UNSUPPORTED_SPECIAL_CHARACTER,
                pos,
                pattern);
        default:
            return start.addOut(readChar(), ignoreCase, new TokenNFA.State());

View Full Code Here

        c = readChar();
        switch (c) {
        case '0':
            c = readChar();
            if (c < '0' || c > '3') {
                throw new RegExpException(
                    RegExpException.UNSUPPORTED_ESCAPE_CHARACTER,
                    pos - 3,
                    pattern);
            }
            str = String.valueOf(c);
            c = (char) peekChar(0);
            if ('0' <= c && c <= '7') {
                str += String.valueOf(readChar());
                c = (char) peekChar(0);
                if ('0' <= c && c <= '7') {
                    str += String.valueOf(readChar());
                }
            }
            try {
                return (char) Integer.parseInt(str, 8);
            } catch (NumberFormatException e) {
                throw new RegExpException(
                    RegExpException.UNSUPPORTED_ESCAPE_CHARACTER,
                    pos - str.length() - 2,
                    pattern);
            }
        case 'x':
            str = String.valueOf(readChar()) +
                  String.valueOf(readChar());
            try {
                return (char) Integer.parseInt(str, 16);
            } catch (NumberFormatException e) {
                throw new RegExpException(
                    RegExpException.UNSUPPORTED_ESCAPE_CHARACTER,
                    pos - str.length() - 2,
                    pattern);
            }
        case 'u':
            str = String.valueOf(readChar()) +
                  String.valueOf(readChar()) +
                  String.valueOf(readChar()) +
                  String.valueOf(readChar());
            try {
                return (char) Integer.parseInt(str, 16);
            } catch (NumberFormatException e) {
                throw new RegExpException(
                    RegExpException.UNSUPPORTED_ESCAPE_CHARACTER,
                    pos - str.length() - 2,
                    pattern);
            }
        case 't':
            return '\t';
        case 'n':
            return '\n';
        case 'r':
            return '\r';
        case 'f':
            return '\f';
        case 'a':
            return '\u0007';
        case 'e':
            return '\u001B';
        default:
            if (('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z')) {
                throw new RegExpException(
                    RegExpException.UNSUPPORTED_ESCAPE_CHARACTER,
                    pos - 2,
                    pattern);
            }
            return c;

View Full Code Here

        while ('0' <= c && c <= '9') {
            buf.append(readChar());
            c = peekChar(0);
        }
        if (buf.length() <= 0) {
            throw new RegExpException(
                RegExpException.UNEXPECTED_CHARACTER,
                pos,
                pattern);
        }
        return Integer.parseInt(buf.toString());

View Full Code Here

     */
    private char readChar() throws RegExpException {
        int  c = peekChar(0);


        if (c < 0) {
            throw new RegExpException(
                RegExpException.UNTERMINATED_PATTERN,
                pos,
                pattern);
        } else {
            pos++;

View Full Code Here

     *             specified one, or if no next character was
     *             available in the pattern string
     */
    private char readChar(char c) throws RegExpException {
        if (c != readChar()) {
            throw new RegExpException(
                RegExpException.UNEXPECTED_CHARACTER,
                pos - 1,
                pattern);
        }
        return c;

View Full Code Here

TOP

Related Classes of net.percederberg.grammatica.parser.re.RegExpException

net.percederberg.grammatica.parser.TokenRegExpParser

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.