Examples with RecognitionException org.antlr.runtime.RecognitionException used on opensource projects

Example 81 with RecognitionException

use of org.antlr.runtime.RecognitionException in project xtext-core by eclipse.

the class Lexer method nextToken.

@Override
public Token nextToken() {
    while (true) {
        this.state.token = null;
        this.state.channel = Token.DEFAULT_CHANNEL;
        this.state.tokenStartCharIndex = input.index();
        this.state.tokenStartCharPositionInLine = input.getCharPositionInLine();
        this.state.tokenStartLine = input.getLine();
        this.state.text = null;
        if (input.LA(1) == CharStream.EOF) {
            return Token.EOF_TOKEN;
        }
        try {
            mTokens();
            if (this.state.token == null) {
                emit();
            } else if (this.state.token == Token.SKIP_TOKEN) {
                continue;
            }
            return this.state.token;
        } catch (RecognitionException re) {
            reportError(re);
            if (re instanceof NoViableAltException || re instanceof FailedPredicateException) {
                recover(re);
            }
            // create token that holds mismatched char
            Token t = new CommonToken(input, Token.INVALID_TOKEN_TYPE, Token.HIDDEN_CHANNEL, this.state.tokenStartCharIndex, getCharIndex() - 1);
            t.setLine(this.state.tokenStartLine);
            t.setCharPositionInLine(this.state.tokenStartCharPositionInLine);
            tokenErrorMap.put(t, getErrorMessage(re, this.getTokenNames()));
            emit(t);
            return this.state.token;
        }
    }
}

Example 82 with RecognitionException

use of org.antlr.runtime.RecognitionException in project drools by kiegroup.

the class DrlExprParser method parse.

/**
 * Parse an expression from text
 */
public ConstraintConnectiveDescr parse(final String text) {
    ConstraintConnectiveDescr constraint = null;
    try {
        DRLLexer lexer = DRLFactory.getDRLLexer(new ANTLRStringStream(text), languageLevel);
        CommonTokenStream input = new CommonTokenStream(lexer);
        RecognizerSharedState state = new RecognizerSharedState();
        helper = new ParserHelper(input, state, languageLevel);
        DRLExpressions parser = DRLFactory.getDRLExpressions(input, state, helper, languageLevel);
        parser.setBuildDescr(true);
        // setting initial value just in case
        parser.setLeftMostExpr(null);
        BaseDescr expr = parser.conditionalOrExpression();
        if (expr != null && !parser.hasErrors()) {
            constraint = ConstraintConnectiveDescr.newAnd();
            constraint.addOrMerge(expr);
        }
    } catch (RecognitionException e) {
        helper.reportError(e);
    }
    return constraint;
}

Example 83 with RecognitionException

use of org.antlr.runtime.RecognitionException in project drools by kiegroup.

the class DRL6Parser method attribute.

/**
 * attribute :=
 *       salience
 *   |   enabled
 *   |   ( NO-LOOP
 *       | AUTO-FOCUS
 *       | LOCK-ON-ACTIVE
 *       | REFRACT
 *       | DIRECT
 *       ) BOOLEAN?
 *   |   ( AGENDA-GROUP
 *       | ACTIVATION-GROUP
 *       | RULEFLOW-GROUP
 *       | DATE-EFFECTIVE
 *       | DATE-EXPIRES
 *       | DIALECT
 *       ) STRING
 *   |   CALENDARS STRING (COMMA STRING)*
 *   |   TIMER ( DECIMAL | chunk_(_) )
 *   |   DURATION ( DECIMAL | chunk_(_) )
 *
 * The above syntax is not quite how this is parsed, because the soft keyword
 * is determined by look-ahead and passed on to one of the x-Attribute methods
 * (booleanAttribute, stringAttribute, stringListAttribute, intOrChunkAttribute)
 * which will actually gobble the tokens.
 *
 * @return
 */
public AttributeDescr attribute(AttributeSupportBuilder<?> as) {
    AttributeDescr attribute = null;
    try {
        if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
            helper.emit(Location.LOCATION_RULE_HEADER_KEYWORD);
        }
        if (helper.validateIdentifierKey(DroolsSoftKeywords.SALIENCE)) {
            attribute = salience(as);
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.ENABLED)) {
            attribute = enabled(as);
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.NO) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.LOOP)) {
            attribute = booleanAttribute(as, new String[] { DroolsSoftKeywords.NO, "-", DroolsSoftKeywords.LOOP });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.AUTO) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.FOCUS)) {
            attribute = booleanAttribute(as, new String[] { DroolsSoftKeywords.AUTO, "-", DroolsSoftKeywords.FOCUS });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.LOCK) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.ON) && helper.validateLT(4, "-") && helper.validateLT(5, DroolsSoftKeywords.ACTIVE)) {
            attribute = booleanAttribute(as, new String[] { DroolsSoftKeywords.LOCK, "-", DroolsSoftKeywords.ON, "-", DroolsSoftKeywords.ACTIVE });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.REFRACT)) {
            attribute = booleanAttribute(as, new String[] { DroolsSoftKeywords.REFRACT });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.DIRECT)) {
            attribute = booleanAttribute(as, new String[] { DroolsSoftKeywords.DIRECT });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.AGENDA) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.GROUP)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.AGENDA, "-", DroolsSoftKeywords.GROUP });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.ACTIVATION) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.GROUP)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.ACTIVATION, "-", DroolsSoftKeywords.GROUP });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.RULEFLOW) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.GROUP)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.RULEFLOW, "-", DroolsSoftKeywords.GROUP });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.DATE) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.EFFECTIVE)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.DATE, "-", DroolsSoftKeywords.EFFECTIVE });
            attribute.setType(AttributeDescr.Type.DATE);
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.DATE) && helper.validateLT(2, "-") && helper.validateLT(3, DroolsSoftKeywords.EXPIRES)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.DATE, "-", DroolsSoftKeywords.EXPIRES });
            attribute.setType(AttributeDescr.Type.DATE);
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.DIALECT)) {
            attribute = stringAttribute(as, new String[] { DroolsSoftKeywords.DIALECT });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.CALENDARS)) {
            attribute = stringListAttribute(as, new String[] { DroolsSoftKeywords.CALENDARS });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.TIMER)) {
            attribute = intOrChunkAttribute(as, new String[] { DroolsSoftKeywords.TIMER });
        } else if (helper.validateIdentifierKey(DroolsSoftKeywords.DURATION)) {
            attribute = intOrChunkAttribute(as, new String[] { DroolsSoftKeywords.DURATION });
        }
        if (state.backtracking == 0) {
            helper.emit(Location.LOCATION_RULE_HEADER);
        }
    } catch (RecognitionException re) {
        reportError(re);
    }
    return attribute;
}

Example 84 with RecognitionException

use of org.antlr.runtime.RecognitionException in project drools by kiegroup.

the class DRL6Parser method annotation.

/* ------------------------------------------------------------------------------------------------
    *                         ANNOTATION
    * ------------------------------------------------------------------------------------------------ */
/**
 * annotation := fullAnnotation | AT ID chunk_(_)?
 */
void annotation(AnnotatedDescrBuilder<?> adb) {
    AnnotationDescrBuilder<?> annotation = null;
    try {
        if (speculateFullAnnotation()) {
            boolean buildState = exprParser.isBuildDescr();
            exprParser.setBuildDescr(true);
            exprParser.fullAnnotation(adb);
            exprParser.setBuildDescr(buildState);
        } else {
            // '@'
            Token at = match(input, DRL6Lexer.AT, null, null, DroolsEditorType.SYMBOL);
            if (state.failed)
                return;
            // identifier
            String fqn = qualifiedIdentifier();
            if (state.failed)
                return;
            if (state.backtracking == 0) {
                annotation = adb.newAnnotation(fqn);
                helper.setStart(annotation, at);
            }
            try {
                if (input.LA(1) == DRL6Lexer.LEFT_PAREN) {
                    String value = chunk(DRL6Lexer.LEFT_PAREN, DRL6Lexer.RIGHT_PAREN, -1).trim();
                    if (state.failed)
                        return;
                    if (state.backtracking == 0) {
                        annotation.value(value);
                    }
                }
            } finally {
                if (state.backtracking == 0) {
                    helper.setEnd(annotation);
                }
            }
        }
    } catch (RecognitionException re) {
        reportError(re);
    }
}

Example 85 with RecognitionException

use of org.antlr.runtime.RecognitionException in project drools by kiegroup.

the class DRL6Parser method qualifiedIdentifier.

/**
 * Matches a qualified identifier
 *
 * qualifiedIdentifier := ID ( DOT ID )*
 *
 * @return
 * @throws org.antlr.runtime.RecognitionException
 */
public String qualifiedIdentifier() throws RecognitionException {
    String qi = "";
    try {
        Token first = match(input, DRL6Lexer.ID, null, new int[] { DRL6Lexer.DOT }, DroolsEditorType.IDENTIFIER);
        if (state.failed)
            return qi;
        Token last = first;
        while (input.LA(1) == DRL6Lexer.DOT && input.LA(2) == DRL6Lexer.ID) {
            last = match(input, DRL6Lexer.DOT, null, new int[] { DRL6Lexer.ID }, DroolsEditorType.IDENTIFIER);
            if (state.failed)
                return qi;
            last = match(input, DRL6Lexer.ID, null, new int[] { DRL6Lexer.DOT }, DroolsEditorType.IDENTIFIER);
            if (state.failed)
                return qi;
        }
        qi = input.toString(first, last);
        qi = qi.replace(" ", "");
    } catch (RecognitionException re) {
        reportError(re);
    }
    return qi;
}