public List create()

in sqlparser/seata-sqlparser-druid/src/main/java/org/apache/seata/sqlparser/druid/DruidSQLRecognizerFactoryImpl.java [40:79]
36 lines of code
14 McCabe index (conditional complexity)

    public List<SQLRecognizer> create(String sql, String dbType) {
        List<SQLStatement> asts = SQLUtils.parseStatements(sql, DruidDbTypeAdapter.getAdaptiveDbType(dbType));
        if (CollectionUtils.isEmpty(asts)) {
            throw new UnsupportedOperationException("Unsupported SQL: " + sql);
        }
        if (asts.size() > 1 && !(asts.stream().allMatch(statement -> statement instanceof SQLUpdateStatement)
                || asts.stream().allMatch(statement -> statement instanceof SQLDeleteStatement))) {
            throw new UnsupportedOperationException("ONLY SUPPORT SAME TYPE (UPDATE OR DELETE) MULTI SQL -" + sql);
        }
        List<SQLRecognizer> recognizers = null;
        SQLRecognizer recognizer = null;
        for (SQLStatement ast : asts) {
            SQLOperateRecognizerHolder recognizerHolder =
                    SQLOperateRecognizerHolderFactory.getSQLRecognizerHolder(dbType.toLowerCase());
            if (ast instanceof SQLInsertStatement) {
                recognizer = recognizerHolder.getInsertRecognizer(sql, ast);
            } else if (ast instanceof SQLUpdateStatement) {
                recognizer = recognizerHolder.getUpdateRecognizer(sql, ast);
            } else if (ast instanceof SQLDeleteStatement) {
                recognizer = recognizerHolder.getDeleteRecognizer(sql, ast);
            } else if (ast instanceof SQLSelectStatement) {
                recognizer = recognizerHolder.getSelectForUpdateRecognizer(sql, ast);
            }

            // When recognizer is null, it indicates that recognizerHolder cannot allocate unsupported syntax, like merge and replace
            if (ast instanceof SQLReplaceStatement) {
                //just like:replace into t (id,dr) values (1,'2'), (2,'3')
                throw new NotSupportYetException("not support the sql syntax with ReplaceStatement:" + ast +
                        "\nplease see the doc about SQL restrictions https://seata.apache.org/zh-cn/docs/user/sqlreference/dml");
            }

            if (recognizer != null && recognizer.isSqlSyntaxSupports()) {
                if (recognizers == null) {
                    recognizers = new ArrayList<>();
                }
                recognizers.add(recognizer);
            }
        }
        return recognizers;
    }