54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package api
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import (
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"reflect"
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)
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// Wrap adapts partial api impl to another version
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// proxyT is the proxy type used as input in wrapperT
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// Usage: Wrap(new(v1api.FullNodeStruct), new(v0api.WrapperV1Full), eventsApi).(EventAPI)
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func Wrap(proxyT, wrapperT, impl interface{}) interface{} {
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proxy := reflect.New(reflect.TypeOf(proxyT).Elem())
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proxyMethods := proxy.Elem().FieldByName("Internal")
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ri := reflect.ValueOf(impl)
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for i := 0; i < ri.NumMethod(); i++ {
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mt := ri.Type().Method(i)
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if proxyMethods.FieldByName(mt.Name).Kind() == reflect.Invalid {
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continue
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}
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fn := ri.Method(i)
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of := proxyMethods.FieldByName(mt.Name)
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proxyMethods.FieldByName(mt.Name).Set(reflect.MakeFunc(of.Type(), func(args []reflect.Value) (results []reflect.Value) {
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return fn.Call(args)
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}))
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}
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for i := 0; i < proxy.Elem().NumField(); i++ {
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if proxy.Elem().Type().Field(i).Name == "Internal" {
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continue
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}
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subProxy := proxy.Elem().Field(i).FieldByName("Internal")
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for i := 0; i < ri.NumMethod(); i++ {
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mt := ri.Type().Method(i)
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if subProxy.FieldByName(mt.Name).Kind() == reflect.Invalid {
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continue
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}
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fn := ri.Method(i)
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of := subProxy.FieldByName(mt.Name)
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subProxy.FieldByName(mt.Name).Set(reflect.MakeFunc(of.Type(), func(args []reflect.Value) (results []reflect.Value) {
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return fn.Call(args)
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}))
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}
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}
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wp := reflect.New(reflect.TypeOf(wrapperT).Elem())
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wp.Elem().Field(0).Set(proxy)
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return wp.Interface()
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}
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