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payload.go
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payload.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package payload
import (
"github.com/gogo/protobuf/proto"
commonpb "go.temporal.io/api/common/v1"
"go.temporal.io/sdk/converter"
"golang.org/x/exp/maps"
)
var (
defaultDataConverter = converter.GetDefaultDataConverter()
nilPayload, _ = Encode(nil)
emptySlicePayload, _ = Encode([]string{})
)
func EncodeString(str string) *commonpb.Payload {
// Error can be safely ignored here because string always can be converted to JSON
p, _ := defaultDataConverter.ToPayload(str)
return p
}
func EncodeBytes(bytes []byte) *commonpb.Payload {
// Error can be safely ignored here because []byte always can be raw encoded
p, _ := defaultDataConverter.ToPayload(bytes)
return p
}
func Encode(value interface{}) (*commonpb.Payload, error) {
return defaultDataConverter.ToPayload(value)
}
func Decode(p *commonpb.Payload, valuePtr interface{}) error {
return defaultDataConverter.FromPayload(p, valuePtr)
}
func ToString(p *commonpb.Payload) string {
return defaultDataConverter.ToString(p)
}
// MergeMapOfPayload returns a new map resulting from merging map m2 into m1.
// If a key in m2 already exists in m1, then the value in m2 replaces the value in m1.
// If the new payload have nil data or an empty slice data, then it deletes the key.
// For example:
//
// m1 := map[string]*commonpb.Payload{
// "key1": EncodeString("value1"),
// "key2": EncodeString("value2"),
// }
// m2 := map[string]*commonpb.Payload{
// "key1": EncodeString("newValue1"),
// "key2": nilPayload,
// }
// m3 := MergeMapOfPayload(m1, m2)
//
// The resulting map `m3` is:
//
// m1 := map[string]*commonpb.Payload{
// "key1": EncodeString("newValue1"),
// }
func MergeMapOfPayload(
m1 map[string]*commonpb.Payload,
m2 map[string]*commonpb.Payload,
) map[string]*commonpb.Payload {
if m2 == nil {
return maps.Clone(m1)
}
ret := maps.Clone(m1)
if ret == nil {
ret = make(map[string]*commonpb.Payload)
}
for k, v := range m2 {
if proto.Equal(v, nilPayload) || proto.Equal(v, emptySlicePayload) {
delete(ret, k)
} else {
ret[k] = v
}
}
return ret
}