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FindOneAndUpdateOperation.cs
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FindOneAndUpdateOperation.cs
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/* Copyright 2013-present MongoDB Inc.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Collections.Generic;
using MongoDB.Bson;
using MongoDB.Bson.IO;
using MongoDB.Bson.Serialization;
using MongoDB.Driver.Core.Bindings;
using MongoDB.Driver.Core.Connections;
using MongoDB.Driver.Core.Misc;
using MongoDB.Driver.Core.Operations.ElementNameValidators;
using MongoDB.Driver.Core.WireProtocol.Messages.Encoders;
namespace MongoDB.Driver.Core.Operations
{
/// <summary>
/// Represents a find one and update operation.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
public class FindOneAndUpdateOperation<TResult> : FindAndModifyOperationBase<TResult>
{
// fields
private IEnumerable<BsonDocument> _arrayFilters;
private bool? _bypassDocumentValidation;
private readonly BsonDocument _filter;
private BsonValue _hint;
private bool _isUpsert;
private BsonDocument _let;
private TimeSpan? _maxTime;
private BsonDocument _projection;
private ReturnDocument _returnDocument;
private BsonDocument _sort;
private readonly BsonValue _update;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="FindOneAndUpdateOperation{TResult}"/> class.
/// </summary>
/// <param name="collectionNamespace">The collection namespace.</param>
/// <param name="filter">The filter.</param>
/// <param name="update">The update.</param>
/// <param name="resultSerializer">The result serializer.</param>
/// <param name="messageEncoderSettings">The message encoder settings.</param>
public FindOneAndUpdateOperation(CollectionNamespace collectionNamespace, BsonDocument filter, BsonValue update, IBsonSerializer<TResult> resultSerializer, MessageEncoderSettings messageEncoderSettings)
: base(collectionNamespace, resultSerializer, messageEncoderSettings)
{
_filter = Ensure.IsNotNull(filter, nameof(filter));
_update = EnsureUpdateIsValid(update);
_returnDocument = ReturnDocument.Before;
}
// properties
/// <summary>
/// Gets or sets the array filters.
/// </summary>
/// <value>
/// The array filters.
/// </value>
public IEnumerable<BsonDocument> ArrayFilters
{
get { return _arrayFilters; }
set { _arrayFilters = value; }
}
/// <summary>
/// Gets or sets a value indicating whether to bypass document validation.
/// </summary>
/// <value>
/// A value indicating whether to bypass document validation.
/// </value>
public bool? BypassDocumentValidation
{
get { return _bypassDocumentValidation; }
set { _bypassDocumentValidation = value; }
}
/// <summary>
/// Gets the filter.
/// </summary>
/// <value>
/// The filter.
/// </value>
public BsonDocument Filter
{
get { return _filter; }
}
/// <summary>
/// Gets or sets the hint.
/// </summary>
/// <value>
/// The hint.
/// </value>
public BsonValue Hint
{
get { return _hint; }
set { _hint = value; }
}
/// <summary>
/// Gets a value indicating whether a document should be inserted if no matching document is found.
/// </summary>
/// <value>
/// <c>true</c> if a document should be inserted if no matching document is found; otherwise, <c>false</c>.
/// </value>
public bool IsUpsert
{
get { return _isUpsert; }
set { _isUpsert = value; }
}
/// <summary>
/// Gets or sets the let document.
/// </summary>
/// <value>
/// The let document.
/// </value>
public BsonDocument Let
{
get { return _let; }
set { _let = value; }
}
/// <summary>
/// Gets or sets the maximum time the server should spend on this operation.
/// </summary>
/// <value>
/// The maximum time the server should spend on this operation.
/// </value>
public TimeSpan? MaxTime
{
get { return _maxTime; }
set { _maxTime = Ensure.IsNullOrInfiniteOrGreaterThanOrEqualToZero(value, nameof(value)); }
}
/// <summary>
/// Gets or sets the projection.
/// </summary>
/// <value>
/// The projection.
/// </value>
public BsonDocument Projection
{
get { return _projection; }
set { _projection = value; }
}
/// <summary>
/// Gets or sets which version of the modified document to return.
/// </summary>
/// <value>
/// Which version of the modified document to return.
/// </value>
public ReturnDocument ReturnDocument
{
get { return _returnDocument; }
set { _returnDocument = value; }
}
/// <summary>
/// Gets or sets the sort specification.
/// </summary>
/// <value>
/// The sort specification.
/// </value>
public BsonDocument Sort
{
get { return _sort; }
set { _sort = value; }
}
/// <summary>
/// Gets or sets the update specification.
/// </summary>
/// <value>
/// The update specification.
/// </value>
public BsonValue Update
{
get { return _update; }
}
// methods
internal override BsonDocument CreateCommand(ICoreSessionHandle session, ConnectionDescription connectionDescription, long? transactionNumber)
{
var wireVersion = connectionDescription.MaxWireVersion;
FindProjectionChecker.ThrowIfAggregationExpressionIsUsedWhenNotSupported(_projection, wireVersion);
if (Feature.HintForFindAndModifyFeature.DriverMustThrowIfNotSupported(wireVersion) || (WriteConcern != null && !WriteConcern.IsAcknowledged))
{
if (_hint != null)
{
throw new NotSupportedException($"Server version {WireVersion.GetServerVersionForErrorMessage(wireVersion)} does not support hints.");
}
}
var writeConcern = WriteConcernHelper.GetEffectiveWriteConcern(session, WriteConcern);
return new BsonDocument
{
{ "findAndModify", CollectionNamespace.CollectionName },
{ "query", _filter },
{ "update", _update },
{ "new", true, _returnDocument == ReturnDocument.After },
{ "sort", _sort, _sort != null },
{ "fields", _projection, _projection != null },
{ "upsert", true, _isUpsert },
{ "maxTimeMS", () => MaxTimeHelper.ToMaxTimeMS(_maxTime.Value), _maxTime.HasValue },
{ "writeConcern", writeConcern, writeConcern != null },
{ "bypassDocumentValidation", () => _bypassDocumentValidation.Value, _bypassDocumentValidation.HasValue },
{ "collation", () => Collation.ToBsonDocument(), Collation != null },
{ "comment", Comment, Comment != null },
{ "hint", _hint, _hint != null },
{ "arrayFilters", () => new BsonArray(_arrayFilters), _arrayFilters != null },
{ "txnNumber", () => transactionNumber, transactionNumber.HasValue },
{ "let", _let, _let != null }
};
}
/// <inheritdoc/>
protected override IElementNameValidator GetCommandValidator()
{
return Validator.Instance;
}
// private methods
private BsonValue EnsureUpdateIsValid(BsonValue update)
{
Ensure.IsNotNull(update, nameof(update));
switch (update)
{
case BsonDocument document:
{
if (document.ElementCount == 0)
{
throw new ArgumentException("Updates must have at least 1 update operator.", nameof(update));
}
break;
}
case BsonArray array:
{
if (array.Count == 0)
{
throw new ArgumentException("Updates must have at least 1 update operator in a pipeline.", nameof(update));
}
break;
}
default:
throw new ArgumentException("Updates must be BsonDocument or BsonArray.", nameof(update));
}
return update;
}
private class Validator : IElementNameValidator
{
public readonly static Validator Instance = new Validator();
public IElementNameValidator GetValidatorForChildContent(string elementName)
{
if (elementName == "update")
{
return UpdateElementNameValidator.Instance;
}
return NoOpElementNameValidator.Instance;
}
public bool IsValidElementName(string elementName)
{
Ensure.IsNotNull(elementName, nameof(elementName));
return true;
}
}
}
}