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71 lines
2.6 KiB
Go
71 lines
2.6 KiB
Go
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// The MIT License
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//
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// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
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//
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// Copyright (c) 2020 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package converter
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import (
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commonpb "go.temporal.io/api/common/v1"
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)
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// PayloadConverter is an interface to convert a single payload.
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type PayloadConverter interface {
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// ToPayload converts single value to payload. It should return nil if the PayloadConveter can not convert passed value (i.e. type is unknown).
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ToPayload(value interface{}) (*commonpb.Payload, error)
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// FromPayload converts single value from payload. valuePtr should be a reference to the variable of the type that is corresponding for payload encoding.
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// Otherwise it should return error.
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FromPayload(payload *commonpb.Payload, valuePtr interface{}) error
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// ToString converts payload object into human readable string.
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ToString(*commonpb.Payload) string
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// Encoding returns encoding supported by PayloadConverter.
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Encoding() string
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}
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type protoPayloadConverterInterface interface {
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PayloadConverter
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ExcludeProtobufMessageTypes() bool
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}
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func newPayload(data []byte, c PayloadConverter) *commonpb.Payload {
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return &commonpb.Payload{
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Metadata: map[string][]byte{
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MetadataEncoding: []byte(c.Encoding()),
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},
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Data: data,
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}
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}
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func newProtoPayload(data []byte, c protoPayloadConverterInterface, messageType string) *commonpb.Payload {
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if !c.ExcludeProtobufMessageTypes() {
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return &commonpb.Payload{
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Metadata: map[string][]byte{
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MetadataEncoding: []byte(c.Encoding()),
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MetadataMessageType: []byte(messageType),
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},
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Data: data,
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}
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}
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return newPayload(data, c)
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}
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