v23/syncbase/nosql/internal/query/query_functions/str_funcs.go

// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package query_functions

import (
	"errors"
	"strings"

	"v.io/syncbase/v23/syncbase/nosql/internal/query/conversions"
	"v.io/syncbase/v23/syncbase/nosql/internal/query/query_parser"
	"v.io/v23/vdl"
)

func lowerCase(off int64, args []*query_parser.Operand) (*query_parser.Operand, error) {
	strOp, err := conversions.ConvertValueToString(args[0])
	if err != nil {
		return nil, err
	}
	return makeStrOp(off, strings.ToLower(strOp.Str)), nil
}

func upperCase(off int64, args []*query_parser.Operand) (*query_parser.Operand, error) {
	strOp, err := conversions.ConvertValueToString(args[0])
	if err != nil {
		return nil, err
	}
	return makeStrOp(off, strings.ToUpper(strOp.Str)), nil
}

func typeFunc(off int64, args []*query_parser.Operand) (*query_parser.Operand, error) {
	// If operand is not an object, we can't get a type
	if args[0].Type != query_parser.TypObject {
		return nil, errors.New("Type function argument must be object.")
	}
	t := args[0].Object.Type()
	pkg, name := vdl.SplitIdent(t.Name())
	return makeStrOpWithAlt(off, pkg+"."+name, name), nil
}