private void fromAccumulate()

in drools-drl/drools-drl-parser/src/main/java/org/drools/drl/parser/lang/DRL6StrictParser.java [4044:4256]
188 lines of code
46 McCabe index (conditional complexity)

    private void fromAccumulate(PatternDescrBuilder<?> pattern) throws RecognitionException {
        AccumulateDescrBuilder<?> accumulate = helper.start(pattern,
                AccumulateDescrBuilder.class,
                null);
        try {
            if (helper.validateIdentifierKey(DroolsSoftKeywords.ACCUMULATE)) {
                match(input,
                        DRL6Lexer.ID,
                        DroolsSoftKeywords.ACCUMULATE,
                        null,
                        DroolsEditorType.KEYWORD);
            } else {
                // might be using the short mnemonic
                match(input,
                        DRL6Lexer.ID,
                        DroolsSoftKeywords.ACC,
                        null,
                        DroolsEditorType.KEYWORD);
            }
            if (state.failed)
                return;

            if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE);
            }
            match(input,
                    DRL6Lexer.LEFT_PAREN,
                    null,
                    null,
                    DroolsEditorType.SYMBOL);
            if (state.failed)
                return;

            CEDescrBuilder<?, AndDescr> source = accumulate.source();
            try {
                helper.start(source,
                        CEDescrBuilder.class,
                        null);
                lhsAnd(source,
                        false);
                if (state.failed)
                    return;

                if (source.getDescr() != null && source.getDescr() instanceof ConditionalElementDescr) {
                    ConditionalElementDescr root = source.getDescr();
                    BaseDescr[] descrs = root.getDescrs().toArray(new BaseDescr[root.getDescrs().size()]);
                    root.getDescrs().clear();
                    for (int i = 0; i < descrs.length; i++) {
                        root.addOrMerge(descrs[i]);
                    }
                }
            } finally {
                helper.end(CEDescrBuilder.class,
                        source);
            }

            if (input.LA(1) == DRL6Lexer.COMMA) {
                match(input,
                        DRL6Lexer.COMMA,
                        null,
                        null,
                        DroolsEditorType.SYMBOL);
                if (state.failed)
                    return;
            } else if (input.LA(-1) != DRL6Lexer.SEMICOLON) {
                match(input,
                      DRL6Lexer.SEMICOLON,
                      null,
                      null,
                      DroolsEditorType.SYMBOL);
                if (state.failed)
                    return;
            }

            if (helper.validateIdentifierKey(DroolsSoftKeywords.INIT)) {
                // custom code, inline accumulate

                // initBlock
                match(input,
                        DRL6Lexer.ID,
                        DroolsSoftKeywords.INIT,
                        null,
                        DroolsEditorType.KEYWORD);
                if (state.failed)
                    return;
                if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                    helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE_INIT);
                }

                String init = chunk(DRL6Lexer.LEFT_PAREN,
                        DRL6Lexer.RIGHT_PAREN,
                        Location.LOCATION_LHS_FROM_ACCUMULATE_INIT_INSIDE);
                if (state.failed)
                    return;
                if (state.backtracking == 0)
                    accumulate.init(init);

                if (input.LA(1) == DRL6Lexer.COMMA) {
                    match(input,
                            DRL6Lexer.COMMA,
                            null,
                            null,
                            DroolsEditorType.SYMBOL);
                    if (state.failed)
                        return;
                }

                // actionBlock
                match(input,
                        DRL6Lexer.ID,
                        DroolsSoftKeywords.ACTION,
                        null,
                        DroolsEditorType.KEYWORD);
                if (state.failed)
                    return;
                if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                    helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE_ACTION);
                }

                String action = chunk(DRL6Lexer.LEFT_PAREN,
                        DRL6Lexer.RIGHT_PAREN,
                        Location.LOCATION_LHS_FROM_ACCUMULATE_ACTION_INSIDE);
                if (state.failed)
                    return;
                if (state.backtracking == 0)
                    accumulate.action(action);

                if (input.LA(1) == DRL6Lexer.COMMA) {
                    match(input,
                            DRL6Lexer.COMMA,
                            null,
                            null,
                            DroolsEditorType.SYMBOL);
                    if (state.failed)
                        return;
                }

                // reverseBlock
                if (helper.validateIdentifierKey(DroolsSoftKeywords.REVERSE)) {
                    match(input,
                            DRL6Lexer.ID,
                            DroolsSoftKeywords.REVERSE,
                            null,
                            DroolsEditorType.KEYWORD);
                    if (state.failed)
                        return;
                    if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                        helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE_REVERSE);
                    }

                    String reverse = chunk(DRL6Lexer.LEFT_PAREN,
                            DRL6Lexer.RIGHT_PAREN,
                            Location.LOCATION_LHS_FROM_ACCUMULATE_REVERSE_INSIDE);
                    if (state.failed)
                        return;
                    if (state.backtracking == 0)
                        accumulate.reverse(reverse);

                    if (input.LA(1) == DRL6Lexer.COMMA) {
                        match(input,
                                DRL6Lexer.COMMA,
                                null,
                                null,
                                DroolsEditorType.SYMBOL);
                        if (state.failed)
                            return;
                    }
                }

                // resultBlock
                match(input,
                        DRL6Lexer.ID,
                        DroolsSoftKeywords.RESULT,
                        null,
                        DroolsEditorType.KEYWORD);
                if (state.failed)
                    return;

                if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                    helper.emit(Location.LOCATION_LHS_FROM_ACCUMULATE_RESULT);
                }

                String result = chunk(DRL6Lexer.LEFT_PAREN,
                        DRL6Lexer.RIGHT_PAREN,
                        Location.LOCATION_LHS_FROM_ACCUMULATE_RESULT_INSIDE);
                if (state.failed)
                    return;
                if (state.backtracking == 0)
                    accumulate.result(result);
            } else {
                // accumulate functions
                accumulateFunction(accumulate,
                                   false,
                                   null);
                if (state.failed)
                    return;
            }

            match(input,
                    DRL6Lexer.RIGHT_PAREN,
                    null,
                    null,
                    DroolsEditorType.SYMBOL);
            if (state.failed)
                return;
        } finally {
            helper.end(AccumulateDescrBuilder.class,
                    accumulate);
            if (state.backtracking == 0 && input.LA(1) != DRL6Lexer.EOF) {
                helper.emit(Location.LOCATION_LHS_BEGIN_OF_CONDITION);
            }
        }
    }