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get_all.go
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get_all.go
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// Copyright 2016 The LUCI 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 backend
import (
"bytes"
"github.com/TriggerMail/luci-go/common/errors"
)
// GetAllTarget is the type of configuration to retrieve with GetAll.
//
// GetAllTarget marshals/unmarshals to/from a compact JSON representation. This is
// used by the caching layer.
type GetAllTarget string
const (
// GetAllProject indicates that project configus should be retrieved.
GetAllProject = GetAllTarget("Project")
// GetAllRef indicates that ref configs should be retrieved.
GetAllRef = GetAllTarget("Ref")
)
var (
projectJSON = []byte(`"P"`)
refJSON = []byte(`"R"`)
)
// MarshalJSON implements json.Marshaler.
func (gat GetAllTarget) MarshalJSON() ([]byte, error) {
switch gat {
case GetAllProject:
return projectJSON, nil
case GetAllRef:
return refJSON, nil
default:
return nil, errors.Reason("unknown GetAllTarget: %v", gat).Err()
}
}
// UnmarshalJSON implements json.Unmarshaler.
func (gat *GetAllTarget) UnmarshalJSON(d []byte) error {
switch {
case bytes.Equal(d, projectJSON):
*gat = GetAllProject
case bytes.Equal(d, refJSON):
*gat = GetAllRef
default:
return errors.Reason("unknown GetAllTarget: %q", d).Err()
}
return nil
}