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xsd.go
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xsd.go
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package importer
import (
"bytes"
"encoding/xml"
"fmt"
"sort"
"strconv"
"strings"
"aqwari.net/xml/xsd"
"github.com/sirupsen/logrus"
)
func MakeXSDImporter(logger *logrus.Logger) *XSDImporter {
return &XSDImporter{
logger: logger,
}
}
type XSDImporter struct {
appName string
pkg string
types TypeList
logger *logrus.Logger
}
func (i *XSDImporter) Load(input string) (string, error) {
xsd.StandardSchema = [][]byte{} // Ignore all the standard schemas,
specs, err := xsd.Parse([]byte(input))
if err != nil {
return "", err
}
i.types = TypeList{}
for _, schema := range specs {
schemaTypes := loadSchemaTypes(schema, i.logger)
i.types.Add(schemaTypes.Items()...)
}
i.types.Sort()
info := SyslInfo{
OutputData: OutputData{
AppName: i.appName,
Package: i.pkg,
},
Description: "",
Title: "",
}
result := &bytes.Buffer{}
w := newWriter(result, i.logger)
if err := w.Write(info, i.types); err != nil {
return "", err
}
return result.String(), nil
}
// Set the AppName of the imported app
func (i *XSDImporter) WithAppName(appName string) Importer {
i.appName = appName
return i
}
// Set the package attribute of the imported app
func (i *XSDImporter) WithPackage(pkg string) Importer {
i.pkg = pkg
return i
}
func makeNamespacedType(name xml.Name, target Type) Type {
return &ImportedBuiltInAlias{
name: fmt.Sprintf("%s:%s", name.Space, name.Local),
Target: target,
}
}
func loadSchemaTypes(schema xsd.Schema, logger *logrus.Logger) TypeList {
types := TypeList{}
var xsdToSyslMappings = map[string]string{
"NMTOKEN": StringTypeName,
"integer": "int",
"time": StringTypeName,
"boolean": "bool",
StringTypeName: StringTypeName,
"date": "date",
}
for swaggerName, syslName := range xsdToSyslMappings {
from := xml.Name{Space: "http://www.w3.org/2001/XMLSchema", Local: swaggerName}
to := &SyslBuiltIn{syslName}
types.Add(makeNamespacedType(from, to))
}
keys := make([]xml.Name, 0, len(schema.Types))
for key := range schema.Types {
keys = append(keys, key)
}
sort.Slice(keys, func(i, j int) bool {
return strings.Compare(
fmt.Sprintf("%s:%s", keys[i].Space, keys[i].Local),
fmt.Sprintf("%s:%s", keys[j].Space, keys[j].Local)) < 0
})
for _, name := range keys {
data := schema.Types[name]
if name.Local == "_self" {
rootType := data.(*xsd.ComplexType)
if rootType.Elements == nil {
/**
Some xsd doesn't have element tag is around tag complexType or simpleType, so it can't get _self's elements
with parsing of aqwari.net/xml/xsd. For example:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="User">
<xs:sequence>
<xs:element name="id" type="xs:string"/>
<xs:element name="name" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
*/
continue
}
data = rootType.Elements[0].Type
t := findType(data, &types)
if t == nil {
t = makeType(name, data, &types, logger)
if name.Space != "" {
types.Add(makeNamespacedType(name, t))
}
}
x := t.(*StandardType)
if !contains("~xml_root", x.Attributes) {
x.Attributes = append(x.Attributes, "~xml_root")
}
} else if t := findType(data, &types); t == nil {
types.Add(makeType(name, data, &types, logger))
}
}
return types
}
func findType(t xsd.Type, knownTypes *TypeList) Type {
if res, found := knownTypes.Find(fmt.Sprintf("%s:%s", xsd.XMLName(t).Space, xsd.XMLName(t).Local)); found {
return res
}
if res, found := knownTypes.Find(xsd.XMLName(t).Local); found {
return res
}
return nil
}
func makeType(_ xml.Name, from xsd.Type, knownTypes *TypeList, logger *logrus.Logger) Type {
switch t := from.(type) {
case *xsd.ComplexType:
return makeComplexType(t, knownTypes, logger)
case *xsd.SimpleType:
return makeSimpleType(t, knownTypes, logger)
case xsd.Builtin:
return makeXsdBuiltinType(t, knownTypes)
}
return nil
}
func makeComplexType(from *xsd.ComplexType, knownTypes *TypeList, logger *logrus.Logger) Type {
createChildItem := func(name xml.Name, data xsd.Type, isAttr, optional, plural bool) Field {
childType := findType(data, knownTypes)
if childType == nil {
childType = makeType(name, data, knownTypes, logger)
knownTypes.Add(childType)
}
f := Field{
Name: name.Local,
Type: childType,
}
if isAttr {
f.Attributes = []string{"~xml_attribute"}
}
f.Optional = optional
if from, ok := data.(*xsd.SimpleType); ok && from.Restriction.Min > 0 {
spec := sizeSpec{
Min: int(from.Restriction.Min),
Max: int(from.Restriction.Max),
}
if spec.Max > 0 {
spec.MaxType = MaxSpecified
}
f.SizeSpec = &spec
}
if plural {
f.Type = &Array{Items: f.Type}
}
return f
}
item := &StandardType{
name: from.Name.Local,
}
for _, child := range getAllElements(from) {
c := createChildItem(child.Name, child.Type, false, child.Optional, child.Plural)
if c.SizeSpec == nil {
c.SizeSpec = makeSizeSpecFromAttrs(child.Attr)
}
item.Properties = append(item.Properties, c)
}
for _, child := range from.Attributes {
c := createChildItem(child.Name, child.Type, true, child.Optional, child.Plural)
if c.SizeSpec == nil {
c.SizeSpec = makeSizeSpecFromAttrs(child.Attr)
}
item.Properties = append(item.Properties, c)
}
return item
}
func makeSizeSpecFromAttrs(attrs []xml.Attr) *sizeSpec {
ss := sizeSpec{}
changed := false
for _, attr := range attrs {
switch attr.Name.Local {
case "maxOccurs":
if attr.Value == "unbounded" {
ss.MaxType = OpenEnded
changed = true
} else if val, err := strconv.ParseInt(attr.Value, 0, 32); err == nil {
ss.MaxType = MaxSpecified
ss.Max = int(val)
changed = true
}
case "minOccurs":
if val, err := strconv.ParseInt(attr.Value, 0, 32); err == nil {
ss.Min = int(val)
changed = changed || val > 0
}
}
}
if changed {
return &ss
}
return nil
}
func makeSimpleType(from *xsd.SimpleType, knownTypes *TypeList, logger *logrus.Logger) Type {
item := &Alias{
name: from.Name.Local,
Target: makeType(from.Name, from.Base, knownTypes, logger),
}
return item
}
func makeXsdBuiltinType(from xsd.Builtin, knownTypes *TypeList) Type {
typeStr := StringTypeName
switch from {
case xsd.Integer, xsd.Int:
typeStr = "int"
}
t, _ := knownTypes.Find(typeStr)
return t
}
/*
* Sysl doesn't support extend syntax, so merges its all ansestor's elements to itself.
*/
func getAllElements(current xsd.Type) []xsd.Element {
if current == nil {
return nil
}
if concreteCurrent, cok := current.(*xsd.ComplexType); cok {
parent := concreteCurrent.Base
if parent == nil || parent == xsd.AnyType {
return concreteCurrent.Elements
} else if concreteParent, pok := parent.(*xsd.ComplexType); pok {
return append(getAllElements(concreteParent), concreteCurrent.Elements...)
}
}
return nil
}