/
cellParam.go
628 lines (538 loc) · 16.8 KB
/
cellParam.go
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// Copyright (c) 2016 OpenM++
// This code is licensed under the MIT license (see LICENSE.txt for details)
package db
import (
"errors"
"fmt"
"strconv"
)
// CellParam is value of input parameter.
type CellParam struct {
cellIdValue // dimensions and value
SubId int // parameter subvalue id
}
// CellCodeParam is value of input parameter.
// Dimension(s) items are enum codes, not enum ids.
type CellCodeParam struct {
cellCodeValue // dimensions as enum codes and value
SubId int // parameter subvalue id
}
// CsvFileName return file name of csv file to store parameter rows
func (CellParam) CsvFileName(modelDef *ModelMeta, name string, isIdCsv bool) (string, error) {
// validate parameters
if modelDef == nil {
return "", errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return "", errors.New("invalid (empty) output table name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return "", errors.New("parameter not found: " + name)
}
if isIdCsv {
return modelDef.Param[k].Name + ".id.csv", nil
}
return modelDef.Param[k].Name + ".csv", nil
}
// CsvHeader retrun first line for csv file: column names, it's look like: sub_id,dim0,dim1,param_value.
func (CellParam) CsvHeader(modelDef *ModelMeta, name string, isIdHeader bool, valueName string) ([]string, error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[k]
// make first line columns
h := make([]string, param.Rank+2)
h[0] = "sub_id"
for k := range param.Dim {
h[k+1] = param.Dim[k].Name
}
h[param.Rank+1] = "param_value"
return h, nil
}
// CsvToIdRow return converter from parameter cell (sub id, dimensions, value) to csv row []string.
//
// Converter simply does Sprint() for each sub-value id, dimension item id and value.
// Converter will retrun error if len(row) not equal to number of fields in csv record.
// Double format string is used if parameter type is float, double, long double
func (CellParam) CsvToIdRow(
modelDef *ModelMeta, name string, doubleFmt string, valueName string,
) (
func(interface{}, []string) error, error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[k]
// for float model types use format if specified
isUseFmt := param.typeOf.IsFloat() && doubleFmt != ""
cvt := func(src interface{}, row []string) error {
cell, ok := src.(CellParam)
if !ok {
return errors.New("invalid type, expected: parameter cell (internal error)")
}
n := len(cell.DimIds)
if len(row) != n+2 {
return errors.New("invalid size of csv row buffer, expected: " + strconv.Itoa(n+2))
}
row[0] = fmt.Sprint(cell.SubId)
for k, e := range cell.DimIds {
row[k+1] = fmt.Sprint(e)
}
// use "null" string for db NULL values and format for model float types
if cell.IsNull {
row[n+1] = "null"
} else {
if isUseFmt {
row[n+1] = fmt.Sprintf(doubleFmt, cell.Value)
} else {
row[n+1] = fmt.Sprint(cell.Value)
}
}
return nil
}
return cvt, nil
}
// CsvToRow return converter from parameter cell (sub id, dimensions, value) to csv row []string.
//
// Converter will retrun error if len(row) not equal to number of fields in csv record.
// Double format string is used if parameter type is float, double, long double
// If dimension type is enum based then csv row is enum code and cell.DimIds is enum id.
// If parameter type is enum based then csv row value is enum code and cell value is enum id.
func (CellParam) CsvToRow(
modelDef *ModelMeta, name string, doubleFmt string, valueName string,
) (
func(interface{}, []string) error, error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[k]
// for each dimension create converter from item id to code
fd := make([]func(itemId int) (string, error), param.Rank)
for k := 0; k < param.Rank; k++ {
f, err := cvtItemIdToCode(name+"."+param.Dim[k].Name, param.Dim[k].typeOf, false)
if err != nil {
return nil, err
}
fd[k] = f
}
// if parameter value type is float then use format, if not empty
isUseFmt := param.typeOf.IsFloat() && doubleFmt != ""
// if parameter value type is enum-based then convert from enum id to code
isUseEnum := !param.typeOf.IsBuiltIn()
var fv func(itemId int) (string, error)
if isUseEnum {
f, err := cvtItemIdToCode(name, param.typeOf, false)
if err != nil {
return nil, err
}
fv = f
}
cvt := func(src interface{}, row []string) error {
cell, ok := src.(CellParam)
if !ok {
return errors.New("invalid type, expected: parameter cell (internal error)")
}
n := len(cell.DimIds)
if len(row) != n+2 {
return errors.New("invalid size of csv row buffer, expected: " + strconv.Itoa(n+2))
}
row[0] = fmt.Sprint(cell.SubId)
// convert dimension item id to code
for k, e := range cell.DimIds {
v, err := fd[k](e)
if err != nil {
return err
}
row[k+1] = v
}
// convert cell value:
// if float then use format, if enum then find code by id, default: Sprint(value)
// use "null" string for db NULL values and format for model float types
switch {
case cell.IsNull:
row[n+1] = "null"
case isUseFmt:
row[n+1] = fmt.Sprintf(doubleFmt, cell.Value)
case isUseEnum:
// depending on sql + driver it can be different type
var iv int
switch e := cell.Value.(type) {
case int64:
iv = int(e)
case uint64:
iv = int(e)
case int32:
iv = int(e)
case uint32:
iv = int(e)
case int16:
iv = int(e)
case uint16:
iv = int(e)
case int8:
iv = int(e)
case uint8:
iv = int(e)
case uint:
iv = int(e)
case float32: // oracle (very unlikely)
iv = int(e)
case float64: // oracle (often)
iv = int(e)
case int:
iv = e
default:
return errors.New("invalid parameter value type, expected: integer enum")
}
v, err := fv(int(iv))
if err != nil {
return err
}
row[n+1] = v
default:
row[n+1] = fmt.Sprint(cell.Value)
}
return nil
}
return cvt, nil
}
// CsvToCell return closure to convert csv row []string to parameter cell (sub id, dimensions, value).
//
// It does retrun error if len(row) not equal to number of fields in cell db-record.
// If dimension type is enum based then csv row is enum code and cell.DimIds is enum id.
// If parameter type is enum based then csv row value is enum code and cell value is enum id.
func (CellParam) CsvToCell(
modelDef *ModelMeta, name string, subCount int, valueName string,
) (
func(row []string) (interface{}, error), error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
idx, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[idx]
// for each dimension create converter from item code to id
fd := make([]func(src string) (int, error), param.Rank)
for k := 0; k < param.Rank; k++ {
f, err := cvtItemCodeToId(name+"."+param.Dim[k].Name, param.Dim[k].typeOf, false)
if err != nil {
return nil, err
}
fd[k] = f
}
// cell value converter: float, bool, string or integer by default
var fc func(src string) (interface{}, error)
var fe func(src string) (int, error)
var ff func(src string) (bool, float64, error)
isFloat := param.typeOf.IsFloat()
isEnum := !param.typeOf.IsBuiltIn()
isNullable := param.IsExtendable // only extended parameter value can be NULL
switch {
case isEnum:
f, err := cvtItemCodeToId(name, param.typeOf, false)
if err != nil {
return nil, err
}
fe = f
case isFloat:
ff = func(src string) (bool, float64, error) {
if src == "" || src == "null" {
if isNullable {
return true, 0.0, nil
}
// else parameter is not nullable
return true, 0.0, errors.New("invalid parameter value, it cannot be NULL")
}
vf, e := strconv.ParseFloat(src, 64)
if e != nil {
return false, 0.0, e
}
return false, vf, nil
}
case param.typeOf.IsBool():
fc = func(src string) (interface{}, error) { return strconv.ParseBool(src) }
case param.typeOf.IsString():
fc = func(src string) (interface{}, error) { return src, nil }
case param.typeOf.IsInt():
fc = func(src string) (interface{}, error) { return strconv.Atoi(src) }
default:
return nil, errors.New("invalid (not supported) parameter type: " + name)
}
// do conversion
cvt := func(row []string) (interface{}, error) {
// make conversion buffer and check input csv row size
cell := CellParam{cellIdValue: cellIdValue{DimIds: make([]int, param.Rank)}}
n := len(cell.DimIds)
if len(row) != n+2 {
return nil, errors.New("invalid size of csv row, expected: " + strconv.Itoa(n+2))
}
// subvalue number
nSub, err := strconv.Atoi(row[0])
if err != nil {
return nil, err
}
/* validation done at writing
if subCount < 1 || subCount == 1 && nSub != defaultSubId {
return nil, errors.New("invalid sub-value id: " + strconv.Itoa(nSub) + " parameter: " + name)
}
*/
cell.SubId = nSub
// convert dimensions: enum code to enum id or integer value for simple type dimension
for k := range cell.DimIds {
i, err := fd[k](row[k+1])
if err != nil {
return nil, err
}
cell.DimIds[k] = i
}
// value conversion, float value can be NULL
var v interface{}
var isNull bool
switch {
case isEnum:
isNull = false
v, err = fe(row[n+1])
case isFloat:
isNull, v, err = ff(row[n+1])
default:
isNull = false
v, err = fc(row[n+1])
}
if err != nil {
return nil, err
}
cell.IsNull = isNull
cell.Value = v
return cell, nil
}
return cvt, nil
}
// IdToCodeCell return converter from parameter cell of ids: (sub id, dimensions, value)
// to cell of codes: (sub id, dimensions as enum code, value)
//
// If dimension type is enum based then dimensions enum ids can be converted to enum code.
// If dimension type is simple (bool or int) then dimension value converted to string.
// If parameter type is enum based then cell value enum id converted to enum code.
func (CellParam) IdToCodeCell(modelDef *ModelMeta, name string,
) (
func(interface{}) (interface{}, error), error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[k]
// for each dimension create converter from item id to code
fd := make([]func(itemId int) (string, error), param.Rank)
for k := 0; k < param.Rank; k++ {
f, err := cvtItemIdToCode(name+"."+param.Dim[k].Name, param.Dim[k].typeOf, false)
if err != nil {
return nil, err
}
fd[k] = f
}
// if parameter value type is enum-based then convert from enum id to code
isUseEnum := !param.typeOf.IsBuiltIn()
var fv func(itemId int) (string, error)
if isUseEnum {
f, err := cvtItemIdToCode(name, param.typeOf, false)
if err != nil {
return nil, err
}
fv = f
}
// create cell converter
cvt := func(src interface{}) (interface{}, error) {
srcCell, ok := src.(CellParam)
if !ok {
return nil, errors.New("invalid type, expected: parameter cell (internal error)")
}
if len(srcCell.DimIds) != param.Rank {
return nil, errors.New("invalid cell rank: " + strconv.Itoa(len(srcCell.DimIds)) + ", expected: " + strconv.Itoa(param.Rank))
}
dstCell := CellCodeParam{
cellCodeValue: cellCodeValue{
Dims: make([]string, param.Rank),
IsNull: srcCell.IsNull,
},
SubId: srcCell.SubId,
}
// convert dimension item id to code
for k := range srcCell.DimIds {
v, err := fd[k](srcCell.DimIds[k])
if err != nil {
return nil, err
}
dstCell.Dims[k] = v
}
// convert cell value:
// if not enum then copy value else find code by id
if !isUseEnum {
dstCell.Value = srcCell.Value
} else {
// depending on sql + driver it can be different type
var iv int
switch e := srcCell.Value.(type) {
case int64:
iv = int(e)
case uint64:
iv = int(e)
case int32:
iv = int(e)
case uint32:
iv = int(e)
case int16:
iv = int(e)
case uint16:
iv = int(e)
case int8:
iv = int(e)
case uint8:
iv = int(e)
case uint:
iv = int(e)
case float32: // oracle (very unlikely)
iv = int(e)
case float64: // oracle (often)
iv = int(e)
case int:
iv = e
default:
return nil, errors.New("invalid parameter value type, expected: integer enum")
}
v, err := fv(int(iv)) // find value code by id
if err != nil {
return nil, err
}
dstCell.Value = v
}
return dstCell, nil // converted OK
}
return cvt, nil
}
// CodeToIdCell return converter from parameter cell of codes: (sub id, dimensions as enum code, value)
// to cell of ids: (sub id, dimensions, value)
//
// If dimension type is enum based then dimensions enum codes converted to enum ids.
// If dimension type is simple (bool or int) then dimension code converted from string to dimension type.
// If parameter type is enum based then cell value enum code converted to enum id.
func (CellCodeParam) CodeToIdCell(modelDef *ModelMeta, name string,
) (
func(interface{}) (interface{}, error), error) {
// validate parameters
if modelDef == nil {
return nil, errors.New("invalid (empty) model metadata, look like model not found")
}
if name == "" {
return nil, errors.New("invalid (empty) parameter name")
}
// find parameter by name
k, ok := modelDef.ParamByName(name)
if !ok {
return nil, errors.New("parameter not found: " + name)
}
param := &modelDef.Param[k]
// for each dimension create converter from item code to id
fd := make([]func(itemCode string) (int, error), param.Rank)
for k := 0; k < param.Rank; k++ {
f, err := cvtItemCodeToId(name+"."+param.Dim[k].Name, param.Dim[k].typeOf, false)
if err != nil {
return nil, err
}
fd[k] = f
}
// if parameter value type is enum-based then convert from enum code to id
isUseEnum := !param.typeOf.IsBuiltIn()
var fv func(itemCode string) (int, error)
if isUseEnum {
f, err := cvtItemCodeToId(name, param.typeOf, false)
if err != nil {
return nil, err
}
fv = f
}
// create cell converter
cvt := func(src interface{}) (interface{}, error) {
srcCell, ok := src.(CellCodeParam)
if !ok {
return nil, errors.New("invalid type, expected: parameter code cell (internal error)")
}
if len(srcCell.Dims) != param.Rank {
return nil, errors.New("invalid cell rank: " + strconv.Itoa(len(srcCell.Dims)) + ", expected: " + strconv.Itoa(param.Rank))
}
dstCell := CellParam{
cellIdValue: cellIdValue{
DimIds: make([]int, param.Rank),
IsNull: srcCell.IsNull,
},
SubId: srcCell.SubId,
}
// convert dimension item code to id
for k := range srcCell.Dims {
v, err := fd[k](srcCell.Dims[k])
if err != nil {
return nil, err
}
dstCell.DimIds[k] = v
}
// convert cell value:
// if not enum then copy value else find id by code
if !isUseEnum {
dstCell.Value = srcCell.Value
} else {
sv, ok := srcCell.Value.(string)
if !ok {
return nil, errors.New("invalid parameter value type, expected: string enum code")
}
v, err := fv(sv) // find value id by code
if err != nil {
return nil, err
}
dstCell.Value = v
}
return dstCell, nil // converted OK
}
return cvt, nil
}