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join_point.go
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/
join_point.go
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package aop
import (
"reflect"
)
type joinPointFunc func(JoinPointer) error
type joinPointWithResultFunc func(JoinPointer, Result) error
type proceedingJoinPoint func(ProceedingJoinPointer) error
var (
joinPointFuncType = reflect.TypeOf((*joinPointFunc)(nil)).Elem()
joinPointWithResultFuncType = reflect.TypeOf((*joinPointWithResultFunc)(nil)).Elem()
proceedingJoinPointType = reflect.TypeOf((*proceedingJoinPoint)(nil)).Elem()
)
var (
_ JoinPointer = (*JoinPoint)(nil)
_ ProceedingJoinPointer = (*ProceedingJoinPoint)(nil)
)
type JoinPointer interface {
Args() Args
Target() *Bean
CallID() string
}
type ProceedingJoinPointer interface {
JoinPointer
Proceed(args ...interface{}) Result
}
type JoinPoint struct {
callID string
args Args
target *Bean
}
func (p *JoinPoint) CallID() string {
return p.callID
}
func (p *JoinPoint) Args() Args {
return p.args
}
func (p *JoinPoint) Target() *Bean {
return p.target
}
type ProceedingJoinPoint struct {
JoinPointer
method interface{}
}
func (p *ProceedingJoinPoint) Args() Args {
return p.JoinPointer.Args()
}
func (p *ProceedingJoinPoint) Target() *Bean {
return p.JoinPointer.Target()
}
func (p *ProceedingJoinPoint) Proceed(args ...interface{}) (result Result) {
v := reflect.ValueOf(p.method)
if v.Type().NumIn() > 0 {
if len(args) == 0 {
args = p.JoinPointer.Args()
}
}
var vArgs []reflect.Value
for _, arg := range args {
vArgs = append(vArgs, reflect.ValueOf(arg))
}
rets := v.Call(vArgs)
Result(rets).MapTo(func(r Result) {
result = r
})
return
}