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item.go
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item.go
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package goasterix
import (
"encoding/hex"
"github.com/mokhtarimokhtar/goasterix/uap"
)
type MetaItem struct {
FRN uint8
DataItem string
Description string
Type uap.TypeField
}
type Item struct {
Meta MetaItem
Fixed *Fixed
Extended *Extended
Explicit *Explicit
Repetitive *Repetitive
Compound *Compound
RFS *RandomFieldSequencing
SP *SPandREField
RE *SPandREField
}
func NewItem(field uap.DataField) *Item {
return &Item{
Meta: MetaItem{
FRN: field.FRN,
DataItem: field.DataItem,
Description: field.Description,
Type: field.Type,
},
}
}
func (i *Item) Payload() []byte {
var p []byte
switch i.Meta.Type {
case uap.Fixed:
p = i.Fixed.Payload()
case uap.Extended:
p = i.Extended.Payload()
case uap.Explicit:
p = i.Explicit.Payload()
case uap.Repetitive:
p = i.Repetitive.Payload()
case uap.Compound:
p = i.Compound.Payload()
}
return p
}
func (i *Item) String() string {
var str string
str = i.Meta.DataItem
switch i.Meta.Type {
case uap.Fixed:
str = str + ": " + i.Fixed.String()
case uap.Extended:
str = str + ": " + i.Extended.String()
case uap.Explicit:
str = str + ": " + i.Explicit.String()
case uap.Repetitive:
str = str + ": " + i.Repetitive.String()
case uap.Compound:
str = str + ": " + i.Compound.String()
}
return str
}
type Fixed struct {
Data []byte
}
func (f *Fixed) Payload() []byte {
var p []byte
p = append(p, f.Data...)
return p
}
func (f *Fixed) String() string {
return hex.EncodeToString(f.Data)
}
type Extended struct {
Primary []byte
Secondary []byte
}
func (e *Extended) Payload() []byte {
var p []byte
p = append(p, e.Primary...)
p = append(p, e.Secondary...)
return p
}
func (e *Extended) String() string {
return hex.EncodeToString(e.Primary) + hex.EncodeToString(e.Secondary)
}
type Explicit struct {
Len uint8
Data []byte
}
func (e *Explicit) Payload() []byte {
var p []byte
p = append(p, e.Len)
p = append(p, e.Data...)
return p
}
func (e *Explicit) String() string {
tmp := []byte{e.Len}
return hex.EncodeToString(tmp) + hex.EncodeToString(e.Data)
}
type Repetitive struct {
Rep uint8
Data []byte
}
func (r *Repetitive) Payload() []byte {
var p []byte
p = append(p, r.Rep)
p = append(p, r.Data...)
return p
}
func (r *Repetitive) String() string {
tmp := []byte{r.Rep}
return hex.EncodeToString(tmp) + hex.EncodeToString(r.Data)
}
type Compound struct {
Primary []byte
Secondary []Item
}
func (c *Compound) Payload() []byte {
var p []byte
p = append(p, c.Primary...)
for _, item := range c.Secondary {
tmp := item.Payload()
p = append(p, tmp...)
}
return p
}
func (c Compound) String() string {
var str string
str = "[primary: " + hex.EncodeToString(c.Primary) + "]"
for _, item := range c.Secondary {
str = str + "[" + item.String() + "]"
}
return str
}
type RandomFieldSequencing struct {
N uint8
Sequence []RandomField
}
type RandomField struct {
FRN uint8
Field Item
}
// SPandREField
// The Reserved Expansion Field is used only until and including Edition 2.1 of Part 1 of the ASTERIX documentation.
// The Reserved Expansion Data field is intended to provide a mechanism to introduce intermediate changes to a given
// category, as explained in 7.2.3. In a way similar to the Special Purpose mechanism,
type SPandREField struct {
Len uint8
Data []byte
}