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FixedCountBatchableSourceSerializer.cs
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FixedCountBatchableSourceSerializer.cs
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/* Copyright 2017-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 MongoDB.Bson.IO;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
namespace MongoDB.Driver.Core.Misc
{
/// <summary>
/// A serializer for BatchableSource that serializes a fixed count of items.
/// </summary>
/// <typeparam name="TItem">The type of the items.</typeparam>
public class FixedCountBatchableSourceSerializer<TItem> : SerializerBase<BatchableSource<TItem>>
{
// private fields
private readonly int _count;
private readonly IElementNameValidator _itemElementNameValidator;
private readonly IBsonSerializer<TItem> _itemSerializer;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="FixedCountBatchableSourceSerializer{TITem}" /> class.
/// </summary>
/// <param name="itemSerializer">The item serializer.</param>
/// <param name="itemElementNameValidator">The item element name validator.</param>
/// <param name="count">The count.</param>
public FixedCountBatchableSourceSerializer(IBsonSerializer<TItem> itemSerializer, IElementNameValidator itemElementNameValidator, int count)
{
_itemSerializer = Ensure.IsNotNull(itemSerializer, nameof(itemSerializer));
_itemElementNameValidator = Ensure.IsNotNull(itemElementNameValidator, nameof(itemElementNameValidator));
_count = Ensure.IsBetween(count, 0, int.MaxValue, nameof(count));
}
// public methods
/// <inheritdoc />
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, BatchableSource<TItem> value)
{
Ensure.IsNotNull(value, nameof(value));
var writer = context.Writer;
writer.PushElementNameValidator(_itemElementNameValidator);
try
{
for (var i = 0; i < _count; i++)
{
var item = value.Items[value.Offset + i];
_itemSerializer.Serialize(context, item);
}
}
finally
{
writer.PopElementNameValidator();
}
}
}
}