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120 lines
4.0 KiB
120 lines
4.0 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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// CountOptions represents options that can be used to configure a CountDocuments operation.
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type CountOptions 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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// TODO(GODRIVER-2386): CountOptions executor uses aggregation under the hood, which means this type has to be
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// TODO a string for now. This can be replaced with `Comment interface{}` once 2386 is implemented.
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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 is nil, which means that no comment will be included in the logs.
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Comment *string
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// The index to use for the aggregation. This should either be the index name as a string or the index specification
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// as a document. The driver will return an error if the hint parameter is a multi-key map. The default value is nil,
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// which means that no hint will be sent.
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Hint interface{}
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// The maximum number of documents to count. The default value is 0, which means that there is no limit and all
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// documents matching the filter will be counted.
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Limit *int64
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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 is
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// 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 used in
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// its place to control the amount of time that a single operation can run before returning an error. MaxTime is
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// ignored if Timeout is set on the client.
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MaxTime *time.Duration
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// The number of documents to skip before counting. The default value is 0.
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Skip *int64
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}
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// Count creates a new CountOptions instance.
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func Count() *CountOptions {
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return &CountOptions{}
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}
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// SetCollation sets the value for the Collation field.
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func (co *CountOptions) SetCollation(c *Collation) *CountOptions {
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co.Collation = c
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return co
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}
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// SetComment sets the value for the Comment field.
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func (co *CountOptions) SetComment(c string) *CountOptions {
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co.Comment = &c
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return co
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}
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// SetHint sets the value for the Hint field.
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func (co *CountOptions) SetHint(h interface{}) *CountOptions {
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co.Hint = h
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return co
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}
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// SetLimit sets the value for the Limit field.
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func (co *CountOptions) SetLimit(i int64) *CountOptions {
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co.Limit = &i
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return co
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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 (co *CountOptions) SetMaxTime(d time.Duration) *CountOptions {
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co.MaxTime = &d
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return co
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}
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// SetSkip sets the value for the Skip field.
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func (co *CountOptions) SetSkip(i int64) *CountOptions {
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co.Skip = &i
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return co
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}
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// MergeCountOptions combines the given CountOptions instances into a single CountOptions in a last-one-wins fashion.
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func MergeCountOptions(opts ...*CountOptions) *CountOptions {
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countOpts := Count()
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for _, co := range opts {
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if co == nil {
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continue
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}
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if co.Collation != nil {
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countOpts.Collation = co.Collation
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}
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if co.Comment != nil {
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countOpts.Comment = co.Comment
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}
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if co.Hint != nil {
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countOpts.Hint = co.Hint
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}
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if co.Limit != nil {
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countOpts.Limit = co.Limit
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}
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if co.MaxTime != nil {
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countOpts.MaxTime = co.MaxTime
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}
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if co.Skip != nil {
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countOpts.Skip = co.Skip
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}
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}
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return countOpts
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}
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