/
mapping.go
336 lines (277 loc) · 8.75 KB
/
mapping.go
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package core
import (
"errors"
"fmt"
"sync/atomic"
"github.com/inoxlang/inox/internal/core/symbolic"
"github.com/inoxlang/inox/internal/parse"
"github.com/inoxlang/inox/internal/utils"
)
type Mapping struct {
//key representation (pattern or value) => key
keys map[string]Serializable
//key representation (pattern or value) => value
preComputedStaticEntryValues map[string]Serializable
//key representation (pattern or value) => value
staticEntries map[string]*parse.StaticMappingEntry
//key representation (pattern or value) => value
dynamicEntries map[string]*parse.DynamicMappingEntry
//pattern => key representation
patterns []struct {
string
Pattern
}
shared atomic.Bool
staticCheck bool //TODO: remove at some point, static checks should be mandatory
staticData *MappingStaticData
capturedGlobals map[string]Value
}
func NewMapping(expr *parse.MappingExpression, state *GlobalState) (*Mapping, error) {
mapping := &Mapping{
keys: map[string]Serializable{},
dynamicEntries: map[string]*parse.DynamicMappingEntry{},
preComputedStaticEntryValues: map[string]Serializable{},
patterns: []struct {
string
Pattern
}{},
}
if state.StaticCheckData != nil {
staticData := state.StaticCheckData.GetMappingData(expr)
mapping.staticData = staticData
mapping.staticCheck = true
}
for _, entry := range expr.Entries {
switch e := entry.(type) {
case *parse.StaticMappingEntry:
var key Value
var err error
if valueLit, ok := e.Key.(parse.SimpleValueLiteral); ok && !utils.Implements[*parse.IdentifierLiteral](valueLit) {
key, err = EvalSimpleValueLiteral(valueLit, state)
} else {
//TODO: check has representation
key, err = resolvePattern(e.Key, state)
}
if err != nil {
return nil, err
}
repr := MustGetJSONRepresentationWithConfig(key.(Serializable), state.Ctx, JSONSerializationConfig{ReprConfig: ALL_VISIBLE_REPR_CONFIG})
mapping.keys[repr] = key.(Serializable)
if valueLit, ok := e.Value.(parse.SimpleValueLiteral); ok && !utils.Implements[*parse.IdentifierLiteral](valueLit) {
v, err := EvalSimpleValueLiteral(valueLit, state)
if err != nil {
return nil, err
}
mapping.preComputedStaticEntryValues[repr] = v
} else {
if mapping.staticEntries == nil {
mapping.staticEntries = map[string]*parse.StaticMappingEntry{}
}
mapping.staticEntries[repr] = e
}
if patt, ok := key.(Pattern); ok {
mapping.patterns = append(mapping.patterns, struct {
string
Pattern
}{repr, patt})
}
case *parse.DynamicMappingEntry:
var key Value
var err error
if valueLit, ok := e.Key.(parse.SimpleValueLiteral); ok {
key, err = EvalSimpleValueLiteral(valueLit, state)
} else {
//TODO: check has representation
key, err = resolvePattern(e.Key, state)
}
if err != nil {
return nil, err
}
repr := MustGetJSONRepresentationWithConfig(key.(Serializable), state.Ctx, JSONSerializationConfig{ReprConfig: ALL_VISIBLE_REPR_CONFIG})
mapping.keys[repr] = key.(Serializable)
mapping.dynamicEntries[repr] = e
if patt, ok := key.(Pattern); ok {
mapping.patterns = append(mapping.patterns, struct {
string
Pattern
}{repr, patt})
}
}
}
return mapping, nil
}
func (m *Mapping) Compute(ctx *Context, key Serializable) Value {
repr := MustGetJSONRepresentationWithConfig(key.(Serializable), ctx, JSONSerializationConfig{ReprConfig: ALL_VISIBLE_REPR_CONFIG})
if _, ok := key.(Pattern); ok {
panic(errors.New("mapping.compute: cannot compute value for a pattern"))
}
shared := m.shared.Load()
computeStaticKeyEntryValue := func(entry *parse.StaticMappingEntry) Value {
callingState := ctx.GetClosestState()
//TODO: optimize
var globalConstants map[string]Value
if !shared {
globalConstants = callingState.Globals.Constants()
}
evalState := NewTreeWalkState(callingState.Ctx.BoundChild(), globalConstants)
defer evalState.Global.Ctx.CancelGracefully()
// set global variables
if shared {
for k, v := range m.capturedGlobals {
evalState.Global.Globals.Set(k, v)
}
} else {
callingState.Globals.Foreach(func(name string, v Value, isStartConstant bool) error {
if !isStartConstant {
evalState.Global.Globals.Set(name, v)
}
return nil
})
}
evalState.Global.Out = callingState.Out
evalState.Global.Logger = callingState.Logger
evalState.Global.OutputFieldsInitialized.Store(true)
val, err := TreeWalkEval(entry.Value, evalState)
if err != nil {
//log.Println(err)
callingState.Logger.Print("mapping.compute: ", err)
return Nil
}
return val
}
if v, ok := m.preComputedStaticEntryValues[repr]; ok {
if v == nil {
entry := m.staticEntries[repr]
return computeStaticKeyEntryValue(entry)
}
return v
}
computeDynKeyEntryValue := func(patt Pattern, entry *parse.DynamicMappingEntry) Value {
callingState := ctx.GetClosestState()
varName := entry.KeyVar.(*parse.IdentifierLiteral).Name
var globalConstants map[string]Value
if !shared {
globalConstants = callingState.Globals.Constants()
}
evalState := NewTreeWalkState(callingState.Ctx.BoundChild(), globalConstants)
defer evalState.Global.Ctx.CancelGracefully()
// set global variables
if shared {
for k, v := range m.capturedGlobals {
evalState.Global.Globals.Set(k, v)
}
} else {
callingState.Globals.Foreach(func(name string, v Value, isStartConstant bool) error {
if !isStartConstant {
evalState.Global.Globals.Set(name, v)
}
return nil
})
}
evalState.Global.Out = callingState.Out
evalState.Global.Logger = callingState.Logger
evalState.Global.OutputFieldsInitialized.Store(true)
// state.entryComputeFn = func(k Value) (Value, error) {
// }
evalState.SetGlobal(varName, key, GlobalConst)
if patt != nil && entry.GroupMatchingVariable != nil {
name := entry.GroupMatchingVariable.(*parse.IdentifierLiteral).Name
groups, ok, err := patt.(GroupPattern).MatchGroups(ctx, key)
if err != nil {
panic(err)
}
var obj *Object
if ok {
obj = NewObjectFromMap(groups, evalState.Global.Ctx)
} else {
obj = NewObjectFromMap(ValMap{"0": key}, evalState.Global.Ctx)
}
evalState.SetGlobal(name, obj, GlobalConst)
}
v, err := TreeWalkEval(entry.ValueComputation, evalState)
if err != nil {
callingState.Logger.Print("mapping.compute: ", err)
return Nil
}
return v
}
if entry, ok := m.staticEntries[repr]; ok {
return computeStaticKeyEntryValue(entry)
}
if entry, ok := m.dynamicEntries[repr]; ok {
return computeDynKeyEntryValue(nil, entry)
}
for _, info := range m.patterns {
keyRepr := info.string
patt := info.Pattern
if patt.Test(ctx, key) {
if v, ok := m.preComputedStaticEntryValues[keyRepr]; ok {
return v
}
if entry, ok := m.staticEntries[keyRepr]; ok {
return computeStaticKeyEntryValue(entry)
}
if entry, ok := m.dynamicEntries[keyRepr]; ok {
return computeDynKeyEntryValue(patt, entry)
}
}
}
return Nil
}
func (m *Mapping) IsSharable(originState *GlobalState) (bool, string) {
if !m.staticCheck {
return false, "mapping is not sharable because static data is missing"
}
if m.staticData != nil && len(m.staticData.referencedGlobals) > 0 {
staticData := m.staticData
for _, name := range staticData.referencedGlobals {
if ok, expl := IsSharableOrClonable(originState.Globals.Get(name), originState); !ok { // TODO: fix: globals could change after call to .IsSharable()
return false, fmt.Sprintf("mapping is not sharable because referenced global %s is not sharable/clonable: %s", name, expl)
}
}
}
return true, ""
}
func (m *Mapping) Share(originState *GlobalState) {
if m.shared.CompareAndSwap(false, true) {
if m.staticData != nil && len(m.staticData.referencedGlobals) > 0 {
staticData := m.staticData
m.capturedGlobals = make(map[string]Value, len(staticData.referencedGlobals))
for _, name := range staticData.referencedGlobals {
val := originState.Globals.Get(name)
val, err := ShareOrClone(val, originState)
if err != nil {
panic(err)
}
m.capturedGlobals[name] = val
}
}
}
}
func (m *Mapping) IsShared() bool {
return m.shared.Load()
}
func (*Mapping) SmartLock(state *GlobalState) {
}
func (*Mapping) SmartUnlock(state *GlobalState) {
}
func (m *Mapping) GetGoMethod(name string) (*GoFunction, bool) {
switch name {
case "compute":
return WrapGoMethod(m.Compute), true
}
return nil, false
}
func (m *Mapping) Prop(ctx *Context, name string) Value {
method, ok := m.GetGoMethod(name)
if !ok {
panic(FormatErrPropertyDoesNotExist(name, m))
}
return method
}
func (*Mapping) SetProp(ctx *Context, name string, value Value) error {
return ErrCannotSetProp
}
func (*Mapping) PropertyNames(ctx *Context) []string {
return symbolic.MAPPING_PROPNAMES
}