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79 lines
2.8 KiB
79 lines
2.8 KiB
// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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package options
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import "time"
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// DistinctOptions represents options that can be used to configure a Distinct operation.
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type DistinctOptions struct {
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// Specifies a collation to use for string comparisons during the operation. This option is only valid for MongoDB
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// versions >= 3.4. For previous server versions, the driver will return an error if this option is used. The
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// default value is nil, which means the default collation of the collection will be used.
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Collation *Collation
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// A string or document that will be included in server logs, profiling logs, and currentOp queries to help trace
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// the operation. The default value is nil, which means that no comment will be included in the logs.
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Comment interface{}
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// The maximum amount of time that the query can run on the server. The default value is nil, meaning that there
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// is no time limit for query execution.
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//
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// NOTE(benjirewis): MaxTime will be deprecated in a future release. The more general Timeout option may be
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// used in its place to control the amount of time that a single operation can run before returning an error.
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// MaxTime is ignored if Timeout is set on the client.
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MaxTime *time.Duration
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}
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// Distinct creates a new DistinctOptions instance.
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func Distinct() *DistinctOptions {
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return &DistinctOptions{}
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}
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// SetCollation sets the value for the Collation field.
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func (do *DistinctOptions) SetCollation(c *Collation) *DistinctOptions {
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do.Collation = c
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return do
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}
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// SetComment sets the value for the Comment field.
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func (do *DistinctOptions) SetComment(comment interface{}) *DistinctOptions {
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do.Comment = comment
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return do
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}
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// SetMaxTime sets the value for the MaxTime field.
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//
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// NOTE(benjirewis): MaxTime will be deprecated in a future release. The more general Timeout
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// option may be used in its place to control the amount of time that a single operation can
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// run before returning an error. MaxTime is ignored if Timeout is set on the client.
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func (do *DistinctOptions) SetMaxTime(d time.Duration) *DistinctOptions {
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do.MaxTime = &d
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return do
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}
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// MergeDistinctOptions combines the given DistinctOptions instances into a single DistinctOptions in a last-one-wins
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// fashion.
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func MergeDistinctOptions(opts ...*DistinctOptions) *DistinctOptions {
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distinctOpts := Distinct()
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for _, do := range opts {
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if do == nil {
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continue
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}
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if do.Collation != nil {
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distinctOpts.Collation = do.Collation
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}
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if do.Comment != nil {
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distinctOpts.Comment = do.Comment
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}
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if do.MaxTime != nil {
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distinctOpts.MaxTime = do.MaxTime
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}
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}
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return distinctOpts
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}
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