| 49 | } |
| 50 | |
| 51 | func (f *Func) buildMeta() { |
| 52 | switch fn := f.Raw.(type) { |
| 53 | case Handler: |
| 54 | f.Meta = &FuncMeta{Handler: fn} |
| 55 | return |
| 56 | // case func(*Context): |
| 57 | // f.Meta = &FuncMeta{Handler: fn} |
| 58 | // return |
| 59 | case func(*Context) error: |
| 60 | f.Meta = &FuncMeta{HandlerWithErr: fn} |
| 61 | return |
| 62 | case func(): |
| 63 | f.Meta = &FuncMeta{RawFunc: fn} |
| 64 | return |
| 65 | case func() error: |
| 66 | f.Meta = &FuncMeta{RawFuncWithErr: fn} |
| 67 | return |
| 68 | case func(...interface{}): |
| 69 | f.Meta = &FuncMeta{RawFuncArgs: fn} |
| 70 | return |
| 71 | case func(...interface{}) error: |
| 72 | f.Meta = &FuncMeta{RawFuncArgsWithErr: fn} |
| 73 | return |
| 74 | } |
| 75 | |
| 76 | fn := f.Raw |
| 77 | |
| 78 | meta := FuncMeta{} |
| 79 | if val, ok := fn.(reflect.Value); ok { |
| 80 | meta.Value = val |
| 81 | } else { |
| 82 | meta.Value = reflect.ValueOf(fn) |
| 83 | } |
| 84 | |
| 85 | meta.Type = meta.Value.Type() |
| 86 | |
| 87 | if meta.Type.Kind() != reflect.Func { |
| 88 | return |
| 89 | } |
| 90 | |
| 91 | meta.ExpectedArgumentsLength = meta.Type.NumIn() |
| 92 | |
| 93 | skipInputs := len(meta.PersistenceInputs) |
| 94 | if meta.ExpectedArgumentsLength > skipInputs { |
| 95 | meta.AcceptsContext = isContext(meta.Type.In(skipInputs)) |
| 96 | } |
| 97 | |
| 98 | if numOut := meta.Type.NumOut(); numOut > 0 { |
| 99 | // error should be the last output. |
| 100 | if isError(meta.Type.Out(numOut - 1)) { |
| 101 | meta.ReturnsError = true |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | persistenceArgs := f.PersistenceArgs |
| 106 | if len(persistenceArgs) > 0 { |
| 107 | inputs := make([]reflect.Value, 0, len(persistenceArgs)) |
| 108 | for _, arg := range persistenceArgs { |