// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-present Datadog, Inc.

package pb

// spanCopiedFields records the fields that are copied in ShallowCopy.
// This should match exactly the fields set in (*Span).ShallowCopy.
// This is used by tests to enforce the correctness of ShallowCopy.
var spanCopiedFields = map[string]struct{}{
	"Service":    {},
	"Name":       {},
	"Resource":   {},
	"TraceID":    {},
	"SpanID":     {},
	"ParentID":   {},
	"Start":      {},
	"Duration":   {},
	"Error":      {},
	"Meta":       {},
	"Metrics":    {},
	"Type":       {},
	"MetaStruct": {},
}

// ShallowCopy returns a shallow copy of the copy-able portion of a Span. These are the
// public fields which will have a Get* method for them. The completeness of this
// method is enforced by the init function above. Instead of using pkg/proto/utils.ProtoCopier,
// which incurs heavy reflection cost for every copy at runtime, we use reflection once at
// startup to ensure our method is complete.
func (s *Span) ShallowCopy() *Span {
	if s == nil {
		return &Span{}
	}
	return &Span{
		Service:    s.Service,
		Name:       s.Name,
		Resource:   s.Resource,
		TraceID:    s.TraceID,
		SpanID:     s.SpanID,
		ParentID:   s.ParentID,
		Start:      s.Start,
		Duration:   s.Duration,
		Error:      s.Error,
		Meta:       s.Meta,
		Metrics:    s.Metrics,
		Type:       s.Type,
		MetaStruct: s.MetaStruct,
	}
}