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set.go
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set.go
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package experimental
import (
"fmt"
"github.com/wolffcm/flux"
"github.com/wolffcm/flux/execute"
"github.com/wolffcm/flux/plan"
"github.com/wolffcm/flux/runtime"
"github.com/wolffcm/flux/values"
)
const SetKind = "setExperimental"
type SetOpSpec struct {
Object values.Object `json:"object"`
}
func init() {
setSignature := runtime.MustLookupBuiltinType("experimental", "set")
runtime.RegisterPackageValue("experimental", "set", flux.MustValue(flux.FunctionValue(SetKind, createSetOpSpec, setSignature)))
flux.RegisterOpSpec(SetKind, newSetOp)
plan.RegisterProcedureSpec(SetKind, newSetProcedure, SetKind)
execute.RegisterTransformation(SetKind, createSetTransformation)
}
func createSetOpSpec(args flux.Arguments, a *flux.Administration) (flux.OperationSpec, error) {
if err := a.AddParentFromArgs(args); err != nil {
return nil, err
}
spec := new(SetOpSpec)
o, err := args.GetRequiredObject("o")
if err != nil {
return nil, err
}
spec.Object = o
return spec, nil
}
func newSetOp() flux.OperationSpec {
return new(SetOpSpec)
}
func (s *SetOpSpec) Kind() flux.OperationKind {
return SetKind
}
type SetProcedureSpec struct {
plan.DefaultCost
Object values.Object
}
func newSetProcedure(qs flux.OperationSpec, pa plan.Administration) (plan.ProcedureSpec, error) {
s, ok := qs.(*SetOpSpec)
if !ok {
return nil, fmt.Errorf("invalid spec type %T", qs)
}
p := &SetProcedureSpec{
Object: s.Object,
}
return p, nil
}
func (s *SetProcedureSpec) Kind() plan.ProcedureKind {
return SetKind
}
func (s *SetProcedureSpec) Copy() plan.ProcedureSpec {
ns := new(SetProcedureSpec)
ns.Object = values.NewObject(s.Object.Type())
s.Object.Range(func(k string, v values.Value) {
ns.Object.Set(k, v)
})
return ns
}
func createSetTransformation(id execute.DatasetID, mode execute.AccumulationMode, spec plan.ProcedureSpec, a execute.Administration) (execute.Transformation, execute.Dataset, error) {
s, ok := spec.(*SetProcedureSpec)
if !ok {
return nil, nil, fmt.Errorf("invalid spec type %T", spec)
}
cache := execute.NewTableBuilderCache(a.Allocator())
d := execute.NewDataset(id, mode, cache)
t := NewSetTransformation(d, cache, s)
return t, d, nil
}
type setTransformation struct {
d execute.Dataset
cache execute.TableBuilderCache
object values.Object
}
func NewSetTransformation(
d execute.Dataset,
cache execute.TableBuilderCache,
spec *SetProcedureSpec,
) execute.Transformation {
return &setTransformation{
d: d,
cache: cache,
object: spec.Object,
}
}
func (t *setTransformation) RetractTable(id execute.DatasetID, key flux.GroupKey) error {
// TODO
return nil
}
func (t *setTransformation) Process(id execute.DatasetID, tbl flux.Table) error {
key := tbl.Key()
updateKey := false
t.object.Range(func(k string, _ values.Value) {
updateKey = updateKey || execute.HasCol(k, key.Cols())
})
if updateKey {
// Update key
cols := make([]flux.ColMeta, len(key.Cols()))
vs := make([]values.Value, len(key.Cols()))
for j, c := range key.Cols() {
cols[j] = c
vs[j] = key.Value(j)
if v, ok := t.object.Get(c.Label); ok {
cols[j] = flux.ColMeta{
Label: c.Label,
Type: flux.ColumnType(v.Type()),
}
vs[j] = v
}
}
key = execute.NewGroupKey(cols, vs)
}
var colMap []int
builder, created := t.cache.TableBuilder(key)
if created {
// Add existing columns from input
for _, c := range tbl.Cols() {
if v, ok := t.object.Get(c.Label); !ok {
builder.AddCol(c)
} else {
if _, err := builder.AddCol(flux.ColMeta{
Label: c.Label,
Type: flux.ColumnType(v.Type()),
}); err != nil {
return err
}
}
}
// Add new columns from object
var rangeErr error
t.object.Range(func(k string, v values.Value) {
if rangeErr != nil {
return
}
if !execute.HasCol(k, builder.Cols()) {
if _, err := builder.AddCol(flux.ColMeta{
Label: k,
Type: flux.ColumnType(v.Type()),
}); err != nil {
rangeErr = err
}
}
})
if rangeErr != nil {
return rangeErr
}
}
colMap = execute.ColMap(colMap, builder, tbl.Cols())
return tbl.Do(func(cr flux.ColReader) error {
for j, c := range builder.Cols() {
v, ok := t.object.Get(c.Label)
if !ok {
// copy column from input to output
cj := colMap[j]
if err := execute.AppendCol(j, cj, cr, builder); err != nil {
return err
}
} else {
// set new value on output
l := cr.Len()
for i := 0; i < l; i++ {
if err := builder.AppendValue(j, v); err != nil {
return err
}
}
}
}
return nil
})
}
func (t *setTransformation) UpdateWatermark(id execute.DatasetID, mark execute.Time) error {
return t.d.UpdateWatermark(mark)
}
func (t *setTransformation) UpdateProcessingTime(id execute.DatasetID, pt execute.Time) error {
return t.d.UpdateProcessingTime(pt)
}
func (t *setTransformation) Finish(id execute.DatasetID, err error) {
t.d.Finish(err)
}