mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-19 01:29:57 +00:00
961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
273 lines
6.4 KiB
Go
273 lines
6.4 KiB
Go
package xmlutil
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import (
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"encoding/base64"
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"encoding/xml"
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"fmt"
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"io"
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"reflect"
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"strconv"
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"strings"
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"time"
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"github.com/aws/aws-sdk-go/private/protocol"
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)
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// UnmarshalXML deserializes an xml.Decoder into the container v. V
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// needs to match the shape of the XML expected to be decoded.
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// If the shape doesn't match unmarshaling will fail.
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func UnmarshalXML(v interface{}, d *xml.Decoder, wrapper string) error {
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n, err := XMLToStruct(d, nil)
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if err != nil {
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return err
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}
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if n.Children != nil {
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for _, root := range n.Children {
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for _, c := range root {
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if wrappedChild, ok := c.Children[wrapper]; ok {
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c = wrappedChild[0] // pull out wrapped element
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}
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err = parse(reflect.ValueOf(v), c, "")
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if err != nil {
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if err == io.EOF {
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return nil
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}
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return err
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}
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}
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}
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return nil
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}
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return nil
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}
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// parse deserializes any value from the XMLNode. The type tag is used to infer the type, or reflect
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// will be used to determine the type from r.
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func parse(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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rtype := r.Type()
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if rtype.Kind() == reflect.Ptr {
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rtype = rtype.Elem() // check kind of actual element type
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}
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t := tag.Get("type")
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if t == "" {
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switch rtype.Kind() {
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case reflect.Struct:
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// also it can't be a time object
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if _, ok := r.Interface().(*time.Time); !ok {
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t = "structure"
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}
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case reflect.Slice:
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// also it can't be a byte slice
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if _, ok := r.Interface().([]byte); !ok {
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t = "list"
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}
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case reflect.Map:
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t = "map"
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}
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}
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switch t {
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case "structure":
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if field, ok := rtype.FieldByName("_"); ok {
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tag = field.Tag
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}
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return parseStruct(r, node, tag)
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case "list":
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return parseList(r, node, tag)
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case "map":
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return parseMap(r, node, tag)
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default:
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return parseScalar(r, node, tag)
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}
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}
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// parseStruct deserializes a structure and its fields from an XMLNode. Any nested
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// types in the structure will also be deserialized.
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func parseStruct(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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t := r.Type()
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if r.Kind() == reflect.Ptr {
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if r.IsNil() { // create the structure if it's nil
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s := reflect.New(r.Type().Elem())
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r.Set(s)
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r = s
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}
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r = r.Elem()
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t = t.Elem()
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}
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// unwrap any payloads
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if payload := tag.Get("payload"); payload != "" {
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field, _ := t.FieldByName(payload)
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return parseStruct(r.FieldByName(payload), node, field.Tag)
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}
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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if c := field.Name[0:1]; strings.ToLower(c) == c {
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continue // ignore unexported fields
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}
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// figure out what this field is called
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name := field.Name
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if field.Tag.Get("flattened") != "" && field.Tag.Get("locationNameList") != "" {
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name = field.Tag.Get("locationNameList")
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} else if locName := field.Tag.Get("locationName"); locName != "" {
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name = locName
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}
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// try to find the field by name in elements
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elems := node.Children[name]
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if elems == nil { // try to find the field in attributes
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if val, ok := node.findElem(name); ok {
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elems = []*XMLNode{{Text: val}}
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}
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}
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member := r.FieldByName(field.Name)
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for _, elem := range elems {
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err := parse(member, elem, field.Tag)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// parseList deserializes a list of values from an XML node. Each list entry
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// will also be deserialized.
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func parseList(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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t := r.Type()
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if tag.Get("flattened") == "" { // look at all item entries
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mname := "member"
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if name := tag.Get("locationNameList"); name != "" {
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mname = name
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}
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if Children, ok := node.Children[mname]; ok {
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if r.IsNil() {
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r.Set(reflect.MakeSlice(t, len(Children), len(Children)))
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}
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for i, c := range Children {
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err := parse(r.Index(i), c, "")
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if err != nil {
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return err
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}
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}
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}
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} else { // flattened list means this is a single element
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if r.IsNil() {
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r.Set(reflect.MakeSlice(t, 0, 0))
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}
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childR := reflect.Zero(t.Elem())
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r.Set(reflect.Append(r, childR))
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err := parse(r.Index(r.Len()-1), node, "")
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if err != nil {
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return err
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}
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}
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return nil
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}
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// parseMap deserializes a map from an XMLNode. The direct children of the XMLNode
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// will also be deserialized as map entries.
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func parseMap(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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if r.IsNil() {
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r.Set(reflect.MakeMap(r.Type()))
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}
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if tag.Get("flattened") == "" { // look at all child entries
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for _, entry := range node.Children["entry"] {
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parseMapEntry(r, entry, tag)
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}
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} else { // this element is itself an entry
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parseMapEntry(r, node, tag)
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}
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return nil
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}
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// parseMapEntry deserializes a map entry from a XML node.
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func parseMapEntry(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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kname, vname := "key", "value"
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if n := tag.Get("locationNameKey"); n != "" {
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kname = n
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}
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if n := tag.Get("locationNameValue"); n != "" {
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vname = n
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}
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keys, ok := node.Children[kname]
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values := node.Children[vname]
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if ok {
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for i, key := range keys {
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keyR := reflect.ValueOf(key.Text)
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value := values[i]
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valueR := reflect.New(r.Type().Elem()).Elem()
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parse(valueR, value, "")
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r.SetMapIndex(keyR, valueR)
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}
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}
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return nil
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}
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// parseScaller deserializes an XMLNode value into a concrete type based on the
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// interface type of r.
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//
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// Error is returned if the deserialization fails due to invalid type conversion,
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// or unsupported interface type.
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func parseScalar(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
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switch r.Interface().(type) {
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case *string:
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r.Set(reflect.ValueOf(&node.Text))
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return nil
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case []byte:
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b, err := base64.StdEncoding.DecodeString(node.Text)
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if err != nil {
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return err
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}
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r.Set(reflect.ValueOf(b))
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case *bool:
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v, err := strconv.ParseBool(node.Text)
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if err != nil {
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return err
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}
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r.Set(reflect.ValueOf(&v))
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case *int64:
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v, err := strconv.ParseInt(node.Text, 10, 64)
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if err != nil {
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return err
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}
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r.Set(reflect.ValueOf(&v))
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case *float64:
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v, err := strconv.ParseFloat(node.Text, 64)
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if err != nil {
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return err
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}
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r.Set(reflect.ValueOf(&v))
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case *time.Time:
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format := tag.Get("timestampFormat")
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if len(format) == 0 {
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format = protocol.ISO8601TimeFormatName
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}
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t, err := protocol.ParseTime(format, node.Text)
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if err != nil {
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return err
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}
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r.Set(reflect.ValueOf(&t))
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default:
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return fmt.Errorf("unsupported value: %v (%s)", r.Interface(), r.Type())
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}
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return nil
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}
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