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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package options
import "time"
// DistinctOptions represents options that can be used to configure a Distinct operation.
type DistinctOptions struct {
// Specifies a collation to use for string comparisons during the operation. This option is only valid for MongoDB
// versions >= 3.4. For previous server versions, the driver will return an error if this option is used. The
// default value is nil, which means the default collation of the collection will be used.
Collation *Collation
// The maximum amount of time that the query can run on the server. The default value is nil, meaning that there
// is no time limit for query execution.
MaxTime *time.Duration
}
// Distinct creates a new DistinctOptions instance.
func Distinct() *DistinctOptions {
return &DistinctOptions{}
}
// SetCollation sets the value for the Collation field.
func (do *DistinctOptions) SetCollation(c *Collation) *DistinctOptions {
do.Collation = c
return do
}
// SetMaxTime sets the value for the MaxTime field.
func (do *DistinctOptions) SetMaxTime(d time.Duration) *DistinctOptions {
do.MaxTime = &d
return do
}
// MergeDistinctOptions combines the given DistinctOptions instances into a single DistinctOptions in a last-one-wins
// fashion.
func MergeDistinctOptions(opts ...*DistinctOptions) *DistinctOptions {
distinctOpts := Distinct()
for _, do := range opts {
if do == nil {
continue
}
if do.Collation != nil {
distinctOpts.Collation = do.Collation
}
if do.MaxTime != nil {
distinctOpts.MaxTime = do.MaxTime
}
}
return distinctOpts
}
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