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activity.go
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activity.go
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package legacybridge
import (
legacyActivity "github.com/TIBCOSoftware/flogo-lib/core/activity"
legacyData "github.com/TIBCOSoftware/flogo-lib/core/data"
"github.com/project-flogo/core/activity"
"github.com/project-flogo/core/data"
"github.com/project-flogo/core/data/metadata"
"github.com/project-flogo/core/data/resolve"
"github.com/project-flogo/core/data/schema"
"github.com/project-flogo/core/support"
"github.com/project-flogo/core/support/log"
"github.com/project-flogo/flow/definition"
)
func RegisterLegacyActivity(act legacyActivity.Activity) {
err := activity.LegacyRegister(act.Metadata().ID, wrapActivity(act))
if err != nil {
log.RootLogger().Warnf("Error registering legacy activity '%s': %v", act.Metadata().ID, err)
}
}
func GetActivity(act legacyActivity.Activity) activity.Activity {
return wrapActivity(act)
}
func wrapActivity(legacyAct legacyActivity.Activity) activity.Activity {
ref := support.GetRef(legacyAct)
newMd := convertOldMetadata(legacyAct.Metadata())
aw := &activityWrapper{legacyAct: legacyAct, ref: ref, newMd: newMd}
return aw
}
type activityWrapper struct {
legacyAct legacyActivity.Activity
newMd *activity.Metadata
ref string
}
func (aw *activityWrapper) BypassValidation() bool {
return schemaValidationEnabled
}
func (aw *activityWrapper) Ref() string {
return aw.ref
}
func (aw *activityWrapper) Metadata() *activity.Metadata {
return aw.newMd
}
func convertOldMetadata(oldMd *legacyActivity.Metadata) *activity.Metadata {
newMd := &activity.Metadata{IOMetadata: &metadata.IOMetadata{}}
newMd.Settings = make(map[string]data.TypedValue, len(oldMd.Settings))
newMd.Input = make(map[string]data.TypedValue, len(oldMd.Input))
newMd.Output = make(map[string]data.TypedValue, len(oldMd.Output))
for name, attr := range oldMd.Settings {
newMd.Settings[name] = convertOldAttribute(attr)
}
for name, attr := range oldMd.Input {
newMd.Input[name] = convertOldAttribute(attr)
}
for name, attr := range oldMd.Output {
newMd.Output[name] = convertOldAttribute(attr)
}
return newMd
}
func convertOldAttribute(attr *legacyData.Attribute) *data.Attribute {
newType, _ := ToNewTypeFromLegacy(attr.Type())
newVal := attr.Value()
var newSchema schema.Schema
//special handling for ComplexObjects
if attr.Type() == legacyData.TypeComplexObject && attr.Value() != nil {
if cVal, ok := attr.Value().(*legacyData.ComplexObject); ok {
newVal = cVal.Value
if cVal.Metadata != "" {
//has schema
def := &schema.Def{Type: "json", Value: cVal.Metadata}
s, err := schema.New(def)
if err != nil {
//log error
}
newSchema = s
}
}
}
return data.NewAttributeWithSchema(attr.Name(), newType, newVal, newSchema)
}
func (aw *activityWrapper) Eval(ctx activity.Context) (done bool, err error) {
legacyCtx := wrapActContext(ctx, aw.legacyAct)
return aw.legacyAct.Eval(legacyCtx)
}
func wrapActContext(ctx activity.Context, legacyAct legacyActivity.Activity) legacyActivity.Context {
wrappedCtx := &activityCtxWrapper{ctx: ctx, legacyAct: legacyAct}
if lCtx, ok := ctx.(activity.LegacyCtx); ok {
wrappedCtx.lCtx = lCtx
}
return wrappedCtx
}
type activityCtxWrapper struct {
legacyAct legacyActivity.Activity
ctx activity.Context
lCtx activity.LegacyCtx
}
func (w *activityCtxWrapper) ActivityHost() legacyActivity.Host {
return &activityHostWrapper{host: w.ctx.ActivityHost()}
}
func (w *activityCtxWrapper) Name() string {
return w.ctx.Name()
}
func (w *activityCtxWrapper) GetInput(name string) interface{} {
val := w.ctx.GetInput(name)
// if the input value is complex, we need to modify it
if oldMdInput := w.legacyAct.Metadata().Input; oldMdInput != nil {
if attr, ok := oldMdInput[name]; ok {
if attr.Type() == legacyData.TypeComplexObject {
md := ""
//see if there is a corresponding input schema to construct complex object
if sIO, ok := w.ctx.(schema.HasSchemaIO); ok {
s := sIO.GetInputSchema(name)
if s != nil {
md = s.Value()
}
}
if val == nil || val == "" {
//Set to empty object
val = "{}"
}
return &legacyData.ComplexObject{Metadata: md, Value: val}
}
}
}
return val
}
func (w *activityCtxWrapper) GetOutput(name string) interface{} {
var value interface{}
if w.lCtx != nil {
value = w.lCtx.GetOutput(name)
}
// if the input value is complex, we need to modify it
if oldMdOutput := w.legacyAct.Metadata().Output; oldMdOutput != nil {
if attr, ok := oldMdOutput[name]; ok {
if attr.Type() == legacyData.TypeComplexObject {
md := ""
//see if there is a corresponding input schema to construct complex object
if sIO, ok := w.ctx.(schema.HasSchemaIO); ok {
s := sIO.GetOutputSchema(name)
if s != nil {
md = s.Value()
}
}
return &legacyData.ComplexObject{Metadata: md, Value: value}
}
}
}
return value
}
func (w *activityCtxWrapper) SetOutput(name string, value interface{}) {
if oldMdOutput := w.legacyAct.Metadata().Output; oldMdOutput != nil {
if attr, ok := oldMdOutput[name]; ok {
if attr.Type() == legacyData.TypeComplexObject {
if cVal, ok := value.(*legacyData.ComplexObject); ok {
err := w.ctx.SetOutput(name, cVal.Value)
if err != nil {
log.RootLogger().Errorf("error setting output '%s': %v", attr.Name(), err)
}
return
}
}
}
}
err := w.ctx.SetOutput(name, value)
if err != nil {
log.RootLogger().Errorf("error setting output '%s': %v", name, err)
}
}
func (w *activityCtxWrapper) GetSetting(setting string) (value interface{}, exists bool) {
return w.lCtx.GetSetting(setting)
}
func (*activityCtxWrapper) GetInitValue(key string) (value interface{}, exists bool) {
return nil, false
}
func (w *activityCtxWrapper) TaskName() string {
return w.ctx.Name()
}
func (w *activityCtxWrapper) FlowDetails() legacyActivity.FlowDetails {
return &flowDetails{host: w.ctx.ActivityHost()}
}
type activityHostWrapper struct {
host activity.Host
}
func (w *activityHostWrapper) ID() string {
return w.host.ID()
}
func (w *activityHostWrapper) Name() string {
return w.host.Name()
}
func (w *activityHostWrapper) IOMetadata() *legacyData.IOMetadata {
md := w.host.IOMetadata()
oldMd := &legacyData.IOMetadata{}
oldMd.Input = make(map[string]*legacyData.Attribute, len(md.Input))
oldMd.Output = make(map[string]*legacyData.Attribute, len(md.Output))
for name, tv := range md.Input {
oldMd.Input[name], _ = toLegacyAttribute(name, tv)
}
for name, tv := range md.Output {
oldMd.Output[name], _ = toLegacyAttribute(name, tv)
}
return oldMd
}
func toLegacyAttribute(name string, tv data.TypedValue) (*legacyData.Attribute, error) {
legacyType, _ := ToLegacyFromNewType(tv.Type())
legacyValue := tv.Value()
if tv.Type() == data.TypeObject {
if s, ok := tv.(schema.HasSchema); ok {
legacyType = legacyData.TypeComplexObject
legacyValue = &legacyData.ComplexObject{Metadata: s.Schema().Value(), Value: tv.Value()}
}
}
return legacyData.NewAttribute(name, legacyType, legacyValue)
}
func (w *activityHostWrapper) Reply(replyData map[string]*legacyData.Attribute, err error) {
reply := make(map[string]interface{}, len(replyData))
for name, attr := range replyData {
if attr.Type() == legacyData.TypeComplexObject {
if attr.Value() != nil {
if compx, err := legacyData.CoerceToComplexObject(attr.Value()); err != nil && compx != nil {
reply[name] = compx.Value
} else {
if err != nil {
log.RootLogger().Errorf("Unable to coerce legacy complex attr '%s': %v", name, err)
}
}
} else {
reply[name] = nil
}
} else {
reply[attr.Name()] = attr.Value()
}
}
w.host.Reply(reply, err)
}
func (w *activityHostWrapper) Return(returnData map[string]*legacyData.Attribute, err error) {
ret := make(map[string]interface{}, len(returnData))
for name, attr := range returnData {
if attr.Type() == legacyData.TypeComplexObject {
if attr.Value() != nil {
if compx, err := legacyData.CoerceToComplexObject(attr.Value()); err != nil && compx != nil {
ret[name] = compx.Value
} else {
if err != nil {
log.RootLogger().Errorf("Unable to coerce legacy complex attr '%s': %v", name, err)
}
}
} else {
ret[name] = nil
}
} else {
ret[attr.Name()] = attr.Value()
}
}
w.host.Return(ret, err)
}
func (w *activityHostWrapper) WorkingData() legacyData.Scope {
return &scopeWrapper{s: w.host.Scope()}
}
func (w *activityHostWrapper) GetResolver() legacyData.Resolver {
return &resolverWrapper{resolver: definition.GetDataResolver()}
}
type resolverWrapper struct {
resolver resolve.CompositeResolver
}
func (w *resolverWrapper) Resolve(toResolve string, scope legacyData.Scope) (value interface{}, err error) {
return w.resolver.Resolve(toResolve, &legacyScopeWrapper{scope})
}
type legacyScopeWrapper struct {
s legacyData.Scope
}
func (w *legacyScopeWrapper) GetValue(name string) (value interface{}, exists bool) {
if attr, exists := w.s.GetAttr(name); exists {
return attr.Value(), true
}
return nil, false
}
func (w *legacyScopeWrapper) SetValue(name string, value interface{}) error {
err := w.s.SetAttrValue(name, value)
return err
}
type scopeWrapper struct {
s data.Scope
}
func (w *scopeWrapper) GetAttr(name string) (attr *legacyData.Attribute, exists bool) {
if val, exists := w.s.GetValue(name); exists {
attr, err := legacyData.NewAttribute(name, legacyData.TypeAny, val)
if err != nil {
return nil, false
}
return attr, true
}
return nil, false
}
func (w *scopeWrapper) SetAttrValue(name string, value interface{}) error {
err := w.s.SetValue(name, value)
return err
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// FlowDetails
type flowDetails struct {
host activity.Host
}
// ID implements activity.FlowDetails.ID
func (fd *flowDetails) ID() string {
return fd.host.ID()
}
// Name implements activity.FlowDetails.Name
func (fd *flowDetails) Name() string {
return fd.host.Name()
}
func (fd *flowDetails) ReplyHandler() legacyActivity.ReplyHandler {
return &replyHandler{fd}
}
type replyHandler struct {
flowDetails *flowDetails
}
func (r *replyHandler) Reply(code int, data interface{}, err error) {
m := make(map[string]interface{})
m["code"] = code
m["data"] = data
r.flowDetails.host.Reply(m, err)
}