github.com/s7techlab/cckit@v0.10.5/state/mapping/event.go (about) 1 package mapping 2 3 import ( 4 "fmt" 5 6 "github.com/hyperledger/fabric-chaincode-go/shim" 7 "github.com/s7techlab/cckit/state" 8 ) 9 10 type ( 11 EventImpl struct { 12 event state.Event 13 mappings EventMappings 14 } 15 ) 16 17 func NewEvent(stub shim.ChaincodeStubInterface, mappings EventMappings) *EventImpl { 18 return &EventImpl{ 19 event: state.NewEvent(stub), 20 mappings: mappings, 21 } 22 } 23 24 func WrapEvent(event state.Event, mappings EventMappings) *EventImpl { 25 return &EventImpl{ 26 event: event, 27 mappings: mappings, 28 } 29 } 30 31 func (e *EventImpl) mapIfMappingExists(entry interface{}) (mapped interface{}, exists bool, err error) { 32 if !e.mappings.Exists(entry) { 33 return entry, false, nil 34 } 35 mapped, err = e.mappings.Map(entry) 36 return mapped, true, err 37 } 38 39 func (e *EventImpl) Set(entry interface{}, value ...interface{}) error { 40 mapped, exists, err := e.mapIfMappingExists(entry) 41 if err != nil { 42 return err 43 } 44 45 if !exists && len(value) == 0 { 46 return fmt.Errorf(`%s: %s`, ErrEventMappingNotFound, mapKey(entry)) 47 } 48 return e.event.Set(mapped, value...) 49 } 50 51 func (e *EventImpl) UseNameTransformer(nt state.StringTransformer) state.Event { 52 return e.event.UseNameTransformer(nt) 53 } 54 55 func (e *EventImpl) UseSetTransformer(tb state.ToBytesTransformer) state.Event { 56 return e.event.UseSetTransformer(tb) 57 }