| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // 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 stub |
| |
| import "android.googlesource.com/platform/tools/gpu/client/shell" |
| |
| // Delegate is an implementation of Target that passes all command requests to a the first child that accepts |
| // them. |
| // A child target refuses a command by returning nil,nil from it's Start method. |
| type Delegate struct { |
| // Handlers holds the set of possible command handlers. |
| Handlers []shell.Target |
| } |
| |
| func (t *Delegate) Start(cmd shell.Cmd) (shell.Process, error) { |
| for _, handler := range t.Handlers { |
| p, err := handler.Start(cmd) |
| if _, unhandled := err.(UnhandledCmdError); !unhandled { |
| return p, err |
| } |
| } |
| return nil, UnhandledCmdError(cmd) |
| } |
| |
| func (Delegate) String() string { return "stub" } |