tusd/composer.mgo

76 lines
1.3 KiB
Plaintext
Raw Normal View History

2016-02-21 22:25:35 +00:00
package tusd
#define USE_FUNC(TYPE) func (store *StoreComposer) Use ## TYPE(x TYPE ## DataStore) { \
store.Uses ## TYPE = x != nil; \
store.TYPE = x; \
}
#define USE_FIELD(TYPE) Uses ## TYPE bool; \
TYPE TYPE ## DataStore
#define USE_FROM(TYPE) if mod, ok := store.(TYPE ## DataStore); ok { \
composer.Use ## TYPE (mod) \
}
#define USE_CAP(TYPE) str += ` TYPE: `; \
if store.Uses ## TYPE { \
str += "✓" \
} else { \
str += "✗" \
}
2016-02-21 22:25:35 +00:00
type StoreComposer struct {
Core DataStore
USE_FIELD(Terminater)
USE_FIELD(Finisher)
USE_FIELD(Locker)
USE_FIELD(GetReader)
USE_FIELD(Concater)
}
func NewStoreComposer() *StoreComposer {
return &StoreComposer{}
}
func NewStoreComposerFromDataStore(store DataStore) *StoreComposer {
composer := NewStoreComposer()
composer.UseCore(store)
USE_FROM(Terminater)
USE_FROM(Finisher)
USE_FROM(Locker)
USE_FROM(GetReader)
USE_FROM(Concater)
return composer
}
func (store *StoreComposer) Capabilities() string {
str := "Core: "
if store.Core != nil {
str += "✓"
} else {
str += "✗"
}
USE_CAP(Terminater)
USE_CAP(Finisher)
USE_CAP(Locker)
USE_CAP(GetReader)
USE_CAP(Concater)
return str
}
2016-02-21 22:25:35 +00:00
func (store *StoreComposer) UseCore(core DataStore) {
store.Core = core
}
USE_FUNC(Terminater)
USE_FUNC(Finisher)
USE_FUNC(Locker)
USE_FUNC(GetReader)
USE_FUNC(Concater)