gitroast/vendor/github.com/go-xorm/xorm/helpers.go

617 lines
14 KiB
Go

// Copyright 2015 The Xorm 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 xorm
import (
"errors"
"fmt"
"reflect"
"sort"
"strconv"
"strings"
"time"
"github.com/go-xorm/core"
)
// str2PK convert string value to primary key value according to tp
func str2PKValue(s string, tp reflect.Type) (reflect.Value, error) {
var err error
var result interface{}
var defReturn = reflect.Zero(tp)
switch tp.Kind() {
case reflect.Int:
result, err = strconv.Atoi(s)
if err != nil {
return defReturn, fmt.Errorf("convert %s as int: %s", s, err.Error())
}
case reflect.Int8:
x, err := strconv.Atoi(s)
if err != nil {
return defReturn, fmt.Errorf("convert %s as int8: %s", s, err.Error())
}
result = int8(x)
case reflect.Int16:
x, err := strconv.Atoi(s)
if err != nil {
return defReturn, fmt.Errorf("convert %s as int16: %s", s, err.Error())
}
result = int16(x)
case reflect.Int32:
x, err := strconv.Atoi(s)
if err != nil {
return defReturn, fmt.Errorf("convert %s as int32: %s", s, err.Error())
}
result = int32(x)
case reflect.Int64:
result, err = strconv.ParseInt(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as int64: %s", s, err.Error())
}
case reflect.Uint:
x, err := strconv.ParseUint(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as uint: %s", s, err.Error())
}
result = uint(x)
case reflect.Uint8:
x, err := strconv.ParseUint(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as uint8: %s", s, err.Error())
}
result = uint8(x)
case reflect.Uint16:
x, err := strconv.ParseUint(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as uint16: %s", s, err.Error())
}
result = uint16(x)
case reflect.Uint32:
x, err := strconv.ParseUint(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as uint32: %s", s, err.Error())
}
result = uint32(x)
case reflect.Uint64:
result, err = strconv.ParseUint(s, 10, 64)
if err != nil {
return defReturn, fmt.Errorf("convert %s as uint64: %s", s, err.Error())
}
case reflect.String:
result = s
default:
return defReturn, errors.New("unsupported convert type")
}
return reflect.ValueOf(result).Convert(tp), nil
}
func str2PK(s string, tp reflect.Type) (interface{}, error) {
v, err := str2PKValue(s, tp)
if err != nil {
return nil, err
}
return v.Interface(), nil
}
func splitTag(tag string) (tags []string) {
tag = strings.TrimSpace(tag)
var hasQuote = false
var lastIdx = 0
for i, t := range tag {
if t == '\'' {
hasQuote = !hasQuote
} else if t == ' ' {
if lastIdx < i && !hasQuote {
tags = append(tags, strings.TrimSpace(tag[lastIdx:i]))
lastIdx = i + 1
}
}
}
if lastIdx < len(tag) {
tags = append(tags, strings.TrimSpace(tag[lastIdx:]))
}
return
}
type zeroable interface {
IsZero() bool
}
func isZero(k interface{}) bool {
switch k.(type) {
case int:
return k.(int) == 0
case int8:
return k.(int8) == 0
case int16:
return k.(int16) == 0
case int32:
return k.(int32) == 0
case int64:
return k.(int64) == 0
case uint:
return k.(uint) == 0
case uint8:
return k.(uint8) == 0
case uint16:
return k.(uint16) == 0
case uint32:
return k.(uint32) == 0
case uint64:
return k.(uint64) == 0
case float32:
return k.(float32) == 0
case float64:
return k.(float64) == 0
case bool:
return k.(bool) == false
case string:
return k.(string) == ""
case zeroable:
return k.(zeroable).IsZero()
}
return false
}
func isStructZero(v reflect.Value) bool {
if !v.IsValid() {
return true
}
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
switch field.Kind() {
case reflect.Ptr:
field = field.Elem()
fallthrough
case reflect.Struct:
if !isStructZero(field) {
return false
}
default:
if field.CanInterface() && !isZero(field.Interface()) {
return false
}
}
}
return true
}
func isArrayValueZero(v reflect.Value) bool {
if !v.IsValid() || v.Len() == 0 {
return true
}
for i := 0; i < v.Len(); i++ {
if !isZero(v.Index(i).Interface()) {
return false
}
}
return true
}
func int64ToIntValue(id int64, tp reflect.Type) reflect.Value {
var v interface{}
switch tp.Kind() {
case reflect.Int16:
v = int16(id)
case reflect.Int32:
v = int32(id)
case reflect.Int:
v = int(id)
case reflect.Int64:
v = id
case reflect.Uint16:
v = uint16(id)
case reflect.Uint32:
v = uint32(id)
case reflect.Uint64:
v = uint64(id)
case reflect.Uint:
v = uint(id)
}
return reflect.ValueOf(v).Convert(tp)
}
func int64ToInt(id int64, tp reflect.Type) interface{} {
return int64ToIntValue(id, tp).Interface()
}
func isPKZero(pk core.PK) bool {
for _, k := range pk {
if isZero(k) {
return true
}
}
return false
}
func indexNoCase(s, sep string) int {
return strings.Index(strings.ToLower(s), strings.ToLower(sep))
}
func splitNoCase(s, sep string) []string {
idx := indexNoCase(s, sep)
if idx < 0 {
return []string{s}
}
return strings.Split(s, s[idx:idx+len(sep)])
}
func splitNNoCase(s, sep string, n int) []string {
idx := indexNoCase(s, sep)
if idx < 0 {
return []string{s}
}
return strings.SplitN(s, s[idx:idx+len(sep)], n)
}
func makeArray(elem string, count int) []string {
res := make([]string, count)
for i := 0; i < count; i++ {
res[i] = elem
}
return res
}
func rValue(bean interface{}) reflect.Value {
return reflect.Indirect(reflect.ValueOf(bean))
}
func rType(bean interface{}) reflect.Type {
sliceValue := reflect.Indirect(reflect.ValueOf(bean))
//return reflect.TypeOf(sliceValue.Interface())
return sliceValue.Type()
}
func structName(v reflect.Type) string {
for v.Kind() == reflect.Ptr {
v = v.Elem()
}
return v.Name()
}
func col2NewCols(columns ...string) []string {
newColumns := make([]string, 0, len(columns))
for _, col := range columns {
col = strings.Replace(col, "`", "", -1)
col = strings.Replace(col, `"`, "", -1)
ccols := strings.Split(col, ",")
for _, c := range ccols {
newColumns = append(newColumns, strings.TrimSpace(c))
}
}
return newColumns
}
func sliceEq(left, right []string) bool {
if len(left) != len(right) {
return false
}
sort.Sort(sort.StringSlice(left))
sort.Sort(sort.StringSlice(right))
for i := 0; i < len(left); i++ {
if left[i] != right[i] {
return false
}
}
return true
}
func reflect2value(rawValue *reflect.Value) (str string, err error) {
aa := reflect.TypeOf((*rawValue).Interface())
vv := reflect.ValueOf((*rawValue).Interface())
switch aa.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
str = strconv.FormatInt(vv.Int(), 10)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
str = strconv.FormatUint(vv.Uint(), 10)
case reflect.Float32, reflect.Float64:
str = strconv.FormatFloat(vv.Float(), 'f', -1, 64)
case reflect.String:
str = vv.String()
case reflect.Array, reflect.Slice:
switch aa.Elem().Kind() {
case reflect.Uint8:
data := rawValue.Interface().([]byte)
str = string(data)
default:
err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
}
// time type
case reflect.Struct:
if aa.ConvertibleTo(core.TimeType) {
str = vv.Convert(core.TimeType).Interface().(time.Time).Format(time.RFC3339Nano)
} else {
err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
}
case reflect.Bool:
str = strconv.FormatBool(vv.Bool())
case reflect.Complex128, reflect.Complex64:
str = fmt.Sprintf("%v", vv.Complex())
/* TODO: unsupported types below
case reflect.Map:
case reflect.Ptr:
case reflect.Uintptr:
case reflect.UnsafePointer:
case reflect.Chan, reflect.Func, reflect.Interface:
*/
default:
err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
}
return
}
func value2Bytes(rawValue *reflect.Value) (data []byte, err error) {
var str string
str, err = reflect2value(rawValue)
if err != nil {
return
}
data = []byte(str)
return
}
func value2String(rawValue *reflect.Value) (data string, err error) {
data, err = reflect2value(rawValue)
if err != nil {
return
}
return
}
func rows2Strings(rows *core.Rows) (resultsSlice []map[string]string, err error) {
fields, err := rows.Columns()
if err != nil {
return nil, err
}
for rows.Next() {
result, err := row2mapStr(rows, fields)
if err != nil {
return nil, err
}
resultsSlice = append(resultsSlice, result)
}
return resultsSlice, nil
}
func rows2maps(rows *core.Rows) (resultsSlice []map[string][]byte, err error) {
fields, err := rows.Columns()
if err != nil {
return nil, err
}
for rows.Next() {
result, err := row2map(rows, fields)
if err != nil {
return nil, err
}
resultsSlice = append(resultsSlice, result)
}
return resultsSlice, nil
}
func row2map(rows *core.Rows, fields []string) (resultsMap map[string][]byte, err error) {
result := make(map[string][]byte)
scanResultContainers := make([]interface{}, len(fields))
for i := 0; i < len(fields); i++ {
var scanResultContainer interface{}
scanResultContainers[i] = &scanResultContainer
}
if err := rows.Scan(scanResultContainers...); err != nil {
return nil, err
}
for ii, key := range fields {
rawValue := reflect.Indirect(reflect.ValueOf(scanResultContainers[ii]))
//if row is null then ignore
if rawValue.Interface() == nil {
//fmt.Println("ignore ...", key, rawValue)
continue
}
if data, err := value2Bytes(&rawValue); err == nil {
result[key] = data
} else {
return nil, err // !nashtsai! REVIEW, should return err or just error log?
}
}
return result, nil
}
func row2mapStr(rows *core.Rows, fields []string) (resultsMap map[string]string, err error) {
result := make(map[string]string)
scanResultContainers := make([]interface{}, len(fields))
for i := 0; i < len(fields); i++ {
var scanResultContainer interface{}
scanResultContainers[i] = &scanResultContainer
}
if err := rows.Scan(scanResultContainers...); err != nil {
return nil, err
}
for ii, key := range fields {
rawValue := reflect.Indirect(reflect.ValueOf(scanResultContainers[ii]))
//if row is null then ignore
if rawValue.Interface() == nil {
//fmt.Println("ignore ...", key, rawValue)
continue
}
if data, err := value2String(&rawValue); err == nil {
result[key] = data
} else {
return nil, err // !nashtsai! REVIEW, should return err or just error log?
}
}
return result, nil
}
func txQuery2(tx *core.Tx, sqlStr string, params ...interface{}) ([]map[string]string, error) {
rows, err := tx.Query(sqlStr, params...)
if err != nil {
return nil, err
}
defer rows.Close()
return rows2Strings(rows)
}
func query2(db *core.DB, sqlStr string, params ...interface{}) ([]map[string]string, error) {
rows, err := db.Query(sqlStr, params...)
if err != nil {
return nil, err
}
defer rows.Close()
return rows2Strings(rows)
}
func setColumnInt(bean interface{}, col *core.Column, t int64) {
v, err := col.ValueOf(bean)
if err != nil {
return
}
if v.CanSet() {
switch v.Type().Kind() {
case reflect.Int, reflect.Int64, reflect.Int32:
v.SetInt(t)
case reflect.Uint, reflect.Uint64, reflect.Uint32:
v.SetUint(uint64(t))
}
}
}
func setColumnTime(bean interface{}, col *core.Column, t time.Time) {
v, err := col.ValueOf(bean)
if err != nil {
return
}
if v.CanSet() {
switch v.Type().Kind() {
case reflect.Struct:
v.Set(reflect.ValueOf(t).Convert(v.Type()))
case reflect.Int, reflect.Int64, reflect.Int32:
v.SetInt(t.Unix())
case reflect.Uint, reflect.Uint64, reflect.Uint32:
v.SetUint(uint64(t.Unix()))
}
}
}
func genCols(table *core.Table, session *Session, bean interface{}, useCol bool, includeQuote bool) ([]string, []interface{}, error) {
colNames := make([]string, 0, len(table.ColumnsSeq()))
args := make([]interface{}, 0, len(table.ColumnsSeq()))
for _, col := range table.Columns() {
if useCol && !col.IsVersion && !col.IsCreated && !col.IsUpdated {
if _, ok := getFlagForColumn(session.Statement.columnMap, col); !ok {
continue
}
}
if col.MapType == core.ONLYFROMDB {
continue
}
fieldValuePtr, err := col.ValueOf(bean)
if err != nil {
return nil, nil, err
}
fieldValue := *fieldValuePtr
if col.IsAutoIncrement {
switch fieldValue.Type().Kind() {
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int, reflect.Int64:
if fieldValue.Int() == 0 {
continue
}
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint, reflect.Uint64:
if fieldValue.Uint() == 0 {
continue
}
case reflect.String:
if len(fieldValue.String()) == 0 {
continue
}
}
}
if col.IsDeleted {
continue
}
if session.Statement.ColumnStr != "" {
if _, ok := getFlagForColumn(session.Statement.columnMap, col); !ok {
continue
}
}
if session.Statement.OmitStr != "" {
if _, ok := getFlagForColumn(session.Statement.columnMap, col); ok {
continue
}
}
// !evalphobia! set fieldValue as nil when column is nullable and zero-value
if _, ok := getFlagForColumn(session.Statement.nullableMap, col); ok {
if col.Nullable && isZero(fieldValue.Interface()) {
var nilValue *int
fieldValue = reflect.ValueOf(nilValue)
}
}
if (col.IsCreated || col.IsUpdated) && session.Statement.UseAutoTime /*&& isZero(fieldValue.Interface())*/ {
// if time is non-empty, then set to auto time
val, t := session.Engine.NowTime2(col.SQLType.Name)
args = append(args, val)
var colName = col.Name
session.afterClosures = append(session.afterClosures, func(bean interface{}) {
col := table.GetColumn(colName)
setColumnTime(bean, col, t)
})
} else if col.IsVersion && session.Statement.checkVersion {
args = append(args, 1)
} else {
arg, err := session.value2Interface(col, fieldValue)
if err != nil {
return colNames, args, err
}
args = append(args, arg)
}
if includeQuote {
colNames = append(colNames, session.Engine.Quote(col.Name)+" = ?")
} else {
colNames = append(colNames, col.Name)
}
}
return colNames, args, nil
}
func indexName(tableName, idxName string) string {
return fmt.Sprintf("IDX_%v_%v", tableName, idxName)
}
func getFlagForColumn(m map[string]bool, col *core.Column) (val bool, has bool) {
if len(m) == 0 {
return false, false
}
n := len(col.Name)
for mk := range m {
if len(mk) != n {
continue
}
if strings.EqualFold(mk, col.Name) {
return m[mk], true
}
}
return false, false
}