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xml_mapper.go
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xml_mapper.go
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package xorm
import (
"encoding/xml"
"fmt"
"strings"
)
type XmlIf struct {
Test string `xml:"test,attr"`
Value string `xml:",cdata"`
}
type XmlSet struct {
XMLName xml.Name `xml:""`
Ifs string `xml:",innerxml"`
//Ifs []XmlIf `xml:"if"`
}
type XmlSql struct {
Id string `xml:"id,attr"`
Value string `xml:",cdata"`
Set XmlSet `xml:",any"`
}
type XmlInclude struct {
RefId string `xml:"refid,attr"`
}
type XmlCrud struct {
Id string `xml:"id,attr"`
Value string `xml:",innerxml"`
//Includes []XmlInclude `xml:"include"`
}
type XmlInsert struct {
XmlCrud
}
type XmlDelete struct {
XmlCrud
}
type XmlSelect struct {
XmlCrud
}
type XmlUpdate struct {
XmlCrud
}
type XmlMapper struct {
Namespace string `xml:"namespace,attr"`
Sqls []XmlSql `xml:"sql"`
Inserts []XmlInsert `xml:"insert"`
Deletes []XmlDelete `xml:"delete"`
Selects []XmlSelect `xml:"select"`
Updates []XmlUpdate `xml:"update"`
}
func (this *XmlIf) Parse() string {
return fmt.Sprintf("%s%s{%% endif %%} ", this.Test, this.Value)
}
func (this *XmlSet) Parse() (res string, flag bool) {
// sort by data & element in xml file
vs, err := parseValue(this.Ifs)
if err != nil {
return
}
if this.XMLName.Local == "where" && len(vs) > 0 {
if vs[0]._type == ValueType.Char || vs[0]._type == ValueType.Cdata {
res = stringJoin(res, "where ")
} else {
res = stringJoin(res, "where 1=1 ")
}
}
for _, v := range vs {
switch v._type {
case ValueType.Char:
res = stringJoin(res, v.Val, " ")
case ValueType.Cdata:
res = stringJoin(res, v.Val, " ")
case ValueType.If:
flag = true
res = stringJoin(res, v.Val, " ")
case ValueType.Include:
case ValueType.Foreach:
}
}
return
}
func (this *XmlSql) Parse() *Sql {
sql := new(Sql)
sql.Id = this.Id
sql._type = SqlType.Define
if len(this.Set.Ifs) > 0 {
this.Set.Parse()
sql.Value, sql._isAnalysis = this.Set.Parse()
} else {
sql.Value = stringJoin(strings.TrimSpace(this.Value), " ")
}
return sql
}
func stringJoin(args ...string) string {
if len(args) == 0 {
return ""
}
var buf []byte
for _, v := range args {
buf = append(buf, []byte(v)...)
}
return string(buf)
}
func (this *XmlCrud) Parse(fn func(string) *Sql) (*Sql, error) {
sql := new(Sql)
sql.Id = this.Id
// sort by data & element in xml file
vs, err := parseValue(this.Value)
if err != nil {
return nil, err
}
for _, v := range vs {
switch v._type {
case ValueType.Char:
sql.Value = stringJoin(sql.Value, v.Val, " ")
case ValueType.Cdata:
sql.Value = stringJoin(sql.Value, v.Val, " ")
case ValueType.Include:
if v.Val == "" {
break
}
defSql := fn(v.Val)
if defSql == nil {
break
}
if defSql._isAnalysis {
sql._isAnalysis = true
}
sql.Value = stringJoin(sql.Value, defSql.Value, " ")
case ValueType.Foreach:
}
}
return sql, nil
}
func (this *XmlMapper) ParseMapper() (*Mapper, error) {
mapper := new(Mapper)
mapper.Namespace = this.Namespace
capacity := len(this.Inserts) + len(this.Deletes) + len(this.Updates) + len(this.Selects)
mapper.Sqls = make(map[string]*Sql, capacity)
// prepare parse define sql (only one)
defSqls := make(map[string]*Sql, len(this.Sqls))
for _, sql := range this.Sqls {
defSqls[sql.Id] = sql.Parse()
}
findDefSqlFn := func(refId string) *Sql {
if sql, ok := defSqls[refId]; ok {
return sql
}
return nil
}
//prepare parse insert sql
for _, sql := range this.Inserts {
s, err := sql.Parse(findDefSqlFn)
if err != nil {
return nil, err
}
s._type = SqlType.Insert
mapper.Sqls[sql.Id] = s
}
//prepare parse delete sql
for _, sql := range this.Deletes {
s, err := sql.Parse(findDefSqlFn)
if err != nil {
return nil, err
}
s._type = SqlType.Delete
mapper.Sqls[sql.Id] = s
}
//prepare parse update sql
for _, sql := range this.Updates {
s, err := sql.Parse(findDefSqlFn)
if err != nil {
return nil, err
}
s._type = SqlType.Update
mapper.Sqls[sql.Id] = s
}
//prepare parse delete sql
for _, sql := range this.Selects {
s, err := sql.Parse(findDefSqlFn)
if err != nil {
return nil, err
}
s._type = SqlType.Select
mapper.Sqls[sql.Id] = s
}
return mapper, nil
}
func UnmarshalXml(content []byte) (*XmlMapper, error) {
mapper := new(XmlMapper)
if err := xml.Unmarshal(content, mapper); err != nil {
return nil, err
}
return mapper, nil
}
func UnmarshalMapper(content []byte) (*Mapper, error) {
if xml, err := UnmarshalXml(content); err != nil {
return nil, err
} else {
return xml.ParseMapper()
}
}
var ValueType = struct {
Char int
Cdata int
Include int
If int
Foreach int
}{
0,
1,
2,
3,
4,
}
type Value struct {
Val string
_type int
}
/*
* min position form two tag
*
* author: jerrylou, <gunsluo@gmail.com>
* since: 2017-03-08 14:05:44
*/
func minPos(s, e int) int {
if s == -1 && e == -1 {
return -1
}
if s >= 0 && e >= 0 {
if s > e {
return e
} else {
return s
}
}
if s >= 0 {
return s
}
return e
}
func parseValue(innerxml string) ([]*Value, error) {
var idx int
var start int
var end int
var typ int
var vs []*Value
var str string = innerxml
for len(str) > 0 {
start = strings.Index(str, "<![CDATA[")
typ = ValueType.Cdata
idx = strings.Index(str, "<include ")
start = minPos(start, idx)
if start == 0 && start == idx {
typ = ValueType.Include
}
idx = strings.Index(str, "<foreach ")
start = minPos(start, idx)
if start == 0 && start == idx {
typ = ValueType.Foreach
}
idx = strings.Index(str, "<if ")
start = minPos(start, idx)
if start == 0 && start == idx {
typ = ValueType.If
}
if start == -1 {
start = 0
end = len(str)
typ = ValueType.Char
}
if start > 0 {
end = start
start = 0
typ = ValueType.Char
}
v := new(Value)
v._type = typ
switch typ {
case ValueType.Char:
val := []byte(str)
v.Val = strings.TrimSpace(string(val[start : end-1]))
if v.Val != "" {
vs = append(vs, v)
}
str = string(val[end:])
case ValueType.Cdata:
end = strings.Index(str, "]]>")
val := []byte(str)
v.Val = strings.TrimSpace(string(val[start+9 : end]))
if v.Val != "" {
vs = append(vs, v)
}
str = string(val[end+3:])
case ValueType.Include:
end = strings.Index(str, "/>")
val := []byte(str)
var x XmlInclude
if err := xml.Unmarshal(val[start:end+2], &x); err != nil {
return nil, err
}
v.Val = x.RefId
if v.Val != "" {
vs = append(vs, v)
}
str = string(val[end+2:])
case ValueType.If:
end = strings.Index(str, "</if>")
val := []byte(str)
x := new(XmlIf)
if err := xml.Unmarshal(val[start:end+5], x); err != nil {
return nil, err
}
v.Val = x.Parse()
if v.Val != "" {
vs = append(vs, v)
}
str = string(val[end+5:])
case ValueType.Foreach:
end = strings.Index(str, "</foreach>")
val := []byte(str)
str = string(val[end+10:])
}
}
return vs, nil
}