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|
package xmlstruct
import (
"encoding/xml"
"fmt"
"reflect"
"strings"
"github.com/ChrisTrenkamp/goxpath/tree"
)
type XMLEle struct {
Val reflect.Value
pos int
prnt tree.Elem
prntTag string
}
func (x *XMLEle) ResValue() string {
if x.Val.Kind() != reflect.Struct {
return fmt.Sprintf("%v", x.Val.Interface())
}
ret := ""
for _, i := range x.GetChildren() {
switch i.GetNodeType() {
case tree.NtChd, tree.NtElem, tree.NtRoot:
ret += i.ResValue()
}
}
return ret
}
func (x *XMLEle) Pos() int {
return x.pos
}
func (x *XMLEle) GetToken() xml.Token {
ret := xml.StartElement{}
if x.prntTag != "" {
ret.Name = getTagInfo(x.prntTag).name
} else {
ret.Name = getXMLName(x.Val)
}
return ret
}
func (x *XMLEle) GetParent() tree.Elem {
return x.prnt
}
func (x *XMLEle) GetNodeType() tree.NodeType {
return tree.NtElem
}
func (x *XMLEle) GetChildren() []tree.Node {
n, _ := getChildren(x, x.Val, x.pos, false)
return n
}
func (x *XMLEle) GetAttrs() []tree.Node {
n, _ := getChildren(x, x.Val, x.pos, true)
return n
}
type tagInfo struct {
name xml.Name
attr bool
cdata bool
comment bool
}
func getTagInfo(tag string) (ret tagInfo) {
spl := strings.Split(tag, ",")
name := strings.Split(spl[0], " ")
if len(spl) >= 2 {
for i := 1; i < len(spl); i++ {
if spl[i] == "chardata" || spl[i] == "cdata" {
ret.cdata = true
} else if spl[i] == "attr" {
ret.attr = true
} else if spl[i] == "comment" {
ret.comment = true
}
}
}
if len(name) == 2 {
ret.name.Space = name[1]
}
ret.name.Local = name[0]
return
}
func getXMLName(val reflect.Value) xml.Name {
n := val.FieldByName("XMLName")
zero := reflect.Value{}
if zero != n {
field, _ := val.Type().FieldByName("XMLName")
tagInfo := getTagInfo(field.Tag.Get("xml"))
if tagInfo.name.Local != "" {
return tagInfo.name
}
if name, ok := n.Interface().(xml.Name); ok {
return name
}
}
return xml.Name{Local: val.Type().Name()}
}
func getChildren(x *XMLEle, val reflect.Value, pos int, getAttrs bool) ([]tree.Node, int) {
if val.Kind() == reflect.Ptr {
val = val.Elem()
}
if val.Kind() == reflect.Interface {
val = reflect.ValueOf(val.Interface())
}
if val.Kind() != reflect.Struct {
if getAttrs {
return []tree.Node{}, x.pos + 1
}
return []tree.Node{&XMLNode{
Val: x.Val,
pos: x.pos + 1,
prnt: x,
nodeType: tree.NtChd,
prntTag: "",
}}, x.pos + 2
}
ret := make([]tree.Node, 0, val.NumField())
for i := 0; i < val.NumField(); i++ {
field := val.Field(i)
name := val.Type().Field(i).Name
if val.Type().Field(i).Anonymous {
nodes, newPos := getChildren(x, field, pos, getAttrs)
ret = append(ret, nodes...)
pos = newPos
continue
}
tag := val.Type().Field(i).Tag.Get("xml")
if tag == "-" || name == "XMLName" {
continue
}
tagInfo := getTagInfo(tag)
pos++
if tagInfo.attr || tagInfo.cdata || tagInfo.comment {
if !getAttrs && tagInfo.attr || getAttrs && !tagInfo.attr {
continue
}
child := &XMLNode{
Val: field,
pos: pos,
prnt: x,
prntTag: tag,
}
if tagInfo.attr {
child.nodeType = tree.NtAttr
} else if tagInfo.cdata {
child.nodeType = tree.NtChd
} else {
child.nodeType = tree.NtComm
}
if tagInfo.name.Local == "" {
child.prntTag = name
}
ret = append(ret, child)
continue
}
if getAttrs {
continue
}
child := &XMLEle{Val: field, pos: pos}
if tag == "" {
tag = name
}
child.prntTag = tag
ret = append(ret, child)
}
return ret, pos + 1
}
|
