Added all required dependencies
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191
vendor/github.com/go-macaron/inject/LICENSE
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vendor/github.com/go-macaron/inject/LICENSE
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|||
Apache License
|
||||
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|
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http://www.apache.org/licenses/
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|
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11
vendor/github.com/go-macaron/inject/README.md
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vendor/github.com/go-macaron/inject/README.md
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|||
# inject [](https://travis-ci.org/go-macaron/inject) [](http://gocover.io/github.com/go-macaron/inject)
|
||||
|
||||
Package inject provides utilities for mapping and injecting dependencies in various ways.
|
||||
|
||||
**This a modified version of [codegangsta/inject](https://github.com/codegangsta/inject) for special purpose of Macaron**
|
||||
|
||||
**Please use the original version if you need dependency injection feature**
|
||||
|
||||
## License
|
||||
|
||||
This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.
|
262
vendor/github.com/go-macaron/inject/inject.go
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vendor/github.com/go-macaron/inject/inject.go
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// Copyright 2013 Jeremy Saenz
|
||||
// Copyright 2015 The Macaron Authors
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License"): you may
|
||||
// not use this file except in compliance with the License. You may obtain
|
||||
// a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
// License for the specific language governing permissions and limitations
|
||||
// under the License.
|
||||
|
||||
// Package inject provides utilities for mapping and injecting dependencies in various ways.
|
||||
package inject
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
)
|
||||
|
||||
// Injector represents an interface for mapping and injecting dependencies into structs
|
||||
// and function arguments.
|
||||
type Injector interface {
|
||||
Applicator
|
||||
Invoker
|
||||
TypeMapper
|
||||
// SetParent sets the parent of the injector. If the injector cannot find a
|
||||
// dependency in its Type map it will check its parent before returning an
|
||||
// error.
|
||||
SetParent(Injector)
|
||||
}
|
||||
|
||||
// Applicator represents an interface for mapping dependencies to a struct.
|
||||
type Applicator interface {
|
||||
// Maps dependencies in the Type map to each field in the struct
|
||||
// that is tagged with 'inject'. Returns an error if the injection
|
||||
// fails.
|
||||
Apply(interface{}) error
|
||||
}
|
||||
|
||||
// Invoker represents an interface for calling functions via reflection.
|
||||
type Invoker interface {
|
||||
// Invoke attempts to call the interface{} provided as a function,
|
||||
// providing dependencies for function arguments based on Type. Returns
|
||||
// a slice of reflect.Value representing the returned values of the function.
|
||||
// Returns an error if the injection fails.
|
||||
Invoke(interface{}) ([]reflect.Value, error)
|
||||
}
|
||||
|
||||
// FastInvoker represents an interface in order to avoid the calling function via reflection.
|
||||
//
|
||||
// example:
|
||||
// type handlerFuncHandler func(http.ResponseWriter, *http.Request) error
|
||||
// func (f handlerFuncHandler)Invoke([]interface{}) ([]reflect.Value, error){
|
||||
// ret := f(p[0].(http.ResponseWriter), p[1].(*http.Request))
|
||||
// return []reflect.Value{reflect.ValueOf(ret)}, nil
|
||||
// }
|
||||
//
|
||||
// type funcHandler func(int, string)
|
||||
// func (f funcHandler)Invoke([]interface{}) ([]reflect.Value, error){
|
||||
// f(p[0].(int), p[1].(string))
|
||||
// return nil, nil
|
||||
// }
|
||||
type FastInvoker interface {
|
||||
// Invoke attempts to call the ordinary functions. If f is a function
|
||||
// with the appropriate signature, f.Invoke([]interface{}) is a Call that calls f.
|
||||
// Returns a slice of reflect.Value representing the returned values of the function.
|
||||
// Returns an error if the injection fails.
|
||||
Invoke([]interface{}) ([]reflect.Value, error)
|
||||
}
|
||||
|
||||
// IsFastInvoker check interface is FastInvoker
|
||||
func IsFastInvoker(h interface{}) bool {
|
||||
_, ok := h.(FastInvoker)
|
||||
return ok
|
||||
}
|
||||
|
||||
// TypeMapper represents an interface for mapping interface{} values based on type.
|
||||
type TypeMapper interface {
|
||||
// Maps the interface{} value based on its immediate type from reflect.TypeOf.
|
||||
Map(interface{}) TypeMapper
|
||||
// Maps the interface{} value based on the pointer of an Interface provided.
|
||||
// This is really only useful for mapping a value as an interface, as interfaces
|
||||
// cannot at this time be referenced directly without a pointer.
|
||||
MapTo(interface{}, interface{}) TypeMapper
|
||||
// Provides a possibility to directly insert a mapping based on type and value.
|
||||
// This makes it possible to directly map type arguments not possible to instantiate
|
||||
// with reflect like unidirectional channels.
|
||||
Set(reflect.Type, reflect.Value) TypeMapper
|
||||
// Returns the Value that is mapped to the current type. Returns a zeroed Value if
|
||||
// the Type has not been mapped.
|
||||
GetVal(reflect.Type) reflect.Value
|
||||
}
|
||||
|
||||
type injector struct {
|
||||
values map[reflect.Type]reflect.Value
|
||||
parent Injector
|
||||
}
|
||||
|
||||
// InterfaceOf dereferences a pointer to an Interface type.
|
||||
// It panics if value is not an pointer to an interface.
|
||||
func InterfaceOf(value interface{}) reflect.Type {
|
||||
t := reflect.TypeOf(value)
|
||||
|
||||
for t.Kind() == reflect.Ptr {
|
||||
t = t.Elem()
|
||||
}
|
||||
|
||||
if t.Kind() != reflect.Interface {
|
||||
panic("Called inject.InterfaceOf with a value that is not a pointer to an interface. (*MyInterface)(nil)")
|
||||
}
|
||||
|
||||
return t
|
||||
}
|
||||
|
||||
// New returns a new Injector.
|
||||
func New() Injector {
|
||||
return &injector{
|
||||
values: make(map[reflect.Type]reflect.Value),
|
||||
}
|
||||
}
|
||||
|
||||
// Invoke attempts to call the interface{} provided as a function,
|
||||
// providing dependencies for function arguments based on Type.
|
||||
// Returns a slice of reflect.Value representing the returned values of the function.
|
||||
// Returns an error if the injection fails.
|
||||
// It panics if f is not a function
|
||||
func (inj *injector) Invoke(f interface{}) ([]reflect.Value, error) {
|
||||
t := reflect.TypeOf(f)
|
||||
switch v := f.(type) {
|
||||
case FastInvoker:
|
||||
return inj.fastInvoke(v, t, t.NumIn())
|
||||
default:
|
||||
return inj.callInvoke(f, t, t.NumIn())
|
||||
}
|
||||
}
|
||||
|
||||
func (inj *injector) fastInvoke(f FastInvoker, t reflect.Type, numIn int) ([]reflect.Value, error) {
|
||||
var in []interface{}
|
||||
if numIn > 0 {
|
||||
in = make([]interface{}, numIn) // Panic if t is not kind of Func
|
||||
var argType reflect.Type
|
||||
var val reflect.Value
|
||||
for i := 0; i < numIn; i++ {
|
||||
argType = t.In(i)
|
||||
val = inj.GetVal(argType)
|
||||
if !val.IsValid() {
|
||||
return nil, fmt.Errorf("Value not found for type %v", argType)
|
||||
}
|
||||
|
||||
in[i] = val.Interface()
|
||||
}
|
||||
}
|
||||
return f.Invoke(in)
|
||||
}
|
||||
|
||||
// callInvoke reflect.Value.Call
|
||||
func (inj *injector) callInvoke(f interface{}, t reflect.Type, numIn int) ([]reflect.Value, error) {
|
||||
var in []reflect.Value
|
||||
if numIn > 0 {
|
||||
in = make([]reflect.Value, numIn)
|
||||
var argType reflect.Type
|
||||
var val reflect.Value
|
||||
for i := 0; i < numIn; i++ {
|
||||
argType = t.In(i)
|
||||
val = inj.GetVal(argType)
|
||||
if !val.IsValid() {
|
||||
return nil, fmt.Errorf("Value not found for type %v", argType)
|
||||
}
|
||||
|
||||
in[i] = val
|
||||
}
|
||||
}
|
||||
return reflect.ValueOf(f).Call(in), nil
|
||||
}
|
||||
|
||||
// Maps dependencies in the Type map to each field in the struct
|
||||
// that is tagged with 'inject'.
|
||||
// Returns an error if the injection fails.
|
||||
func (inj *injector) Apply(val interface{}) error {
|
||||
v := reflect.ValueOf(val)
|
||||
|
||||
for v.Kind() == reflect.Ptr {
|
||||
v = v.Elem()
|
||||
}
|
||||
|
||||
if v.Kind() != reflect.Struct {
|
||||
return nil // Should not panic here ?
|
||||
}
|
||||
|
||||
t := v.Type()
|
||||
|
||||
for i := 0; i < v.NumField(); i++ {
|
||||
f := v.Field(i)
|
||||
structField := t.Field(i)
|
||||
if f.CanSet() && (structField.Tag == "inject" || structField.Tag.Get("inject") != "") {
|
||||
ft := f.Type()
|
||||
v := inj.GetVal(ft)
|
||||
if !v.IsValid() {
|
||||
return fmt.Errorf("Value not found for type %v", ft)
|
||||
}
|
||||
|
||||
f.Set(v)
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Maps the concrete value of val to its dynamic type using reflect.TypeOf,
|
||||
// It returns the TypeMapper registered in.
|
||||
func (i *injector) Map(val interface{}) TypeMapper {
|
||||
i.values[reflect.TypeOf(val)] = reflect.ValueOf(val)
|
||||
return i
|
||||
}
|
||||
|
||||
func (i *injector) MapTo(val interface{}, ifacePtr interface{}) TypeMapper {
|
||||
i.values[InterfaceOf(ifacePtr)] = reflect.ValueOf(val)
|
||||
return i
|
||||
}
|
||||
|
||||
// Maps the given reflect.Type to the given reflect.Value and returns
|
||||
// the Typemapper the mapping has been registered in.
|
||||
func (i *injector) Set(typ reflect.Type, val reflect.Value) TypeMapper {
|
||||
i.values[typ] = val
|
||||
return i
|
||||
}
|
||||
|
||||
func (i *injector) GetVal(t reflect.Type) reflect.Value {
|
||||
val := i.values[t]
|
||||
|
||||
if val.IsValid() {
|
||||
return val
|
||||
}
|
||||
|
||||
// no concrete types found, try to find implementors
|
||||
// if t is an interface
|
||||
if t.Kind() == reflect.Interface {
|
||||
for k, v := range i.values {
|
||||
if k.Implements(t) {
|
||||
val = v
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Still no type found, try to look it up on the parent
|
||||
if !val.IsValid() && i.parent != nil {
|
||||
val = i.parent.GetVal(t)
|
||||
}
|
||||
|
||||
return val
|
||||
|
||||
}
|
||||
|
||||
func (i *injector) SetParent(parent Injector) {
|
||||
i.parent = parent
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue