protected void appendTraversal()

in sql-gremlin/src/main/java/org/twilmes/sql/gremlin/adapter/converter/ast/nodes/operator/aggregate/GremlinSqlAggFunction.java [75:98]

23 lines of code
8 McCabe index (conditional complexity)


    protected void appendTraversal(final GraphTraversal<?, ?> graphTraversal) throws SQLException {
        if (sqlOperands.get(0) instanceof GremlinSqlBasicCall) {
            ((GremlinSqlBasicCall) sqlOperands.get(0)).generateTraversal(graphTraversal);
        } else if (!(sqlOperands.get(0) instanceof GremlinSqlIdentifier) &&
                !(sqlOperands.get(0) instanceof GremlinSqlLiteral)) {
            throw SqlGremlinError.create(SqlGremlinError.UNEXPECTED_OPERAND);
        }

        if (sqlOperands.size() == 1) {
            if (sqlOperands.get(0) instanceof GremlinSqlIdentifier) {
                SqlTraversalEngine.applySqlIdentifier((GremlinSqlIdentifier) sqlOperands.get(0), sqlMetadata,
                        graphTraversal);
            } else if (sqlOperands.get(0) instanceof GremlinSqlLiteral) {
                GremlinSqlLiteral gremlinSqlLiteral = (GremlinSqlLiteral) sqlOperands.get(0);
                gremlinSqlLiteral.appendTraversal(graphTraversal);
            }
        }
        if (AGGREGATE_APPENDERS.containsKey(sqlAggFunction.kind)) {
            AGGREGATE_APPENDERS.get(sqlAggFunction.kind).appendTraversal(graphTraversal, sqlOperands);
        } else {
            throw SqlGremlinError.create(SqlGremlinError.AGGREGATE_NOT_SUPPORTED, sqlAggFunction.kind.sql);
        }
        updateOutputTypeMap();
    }