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BsonValueSerializerBase.cs
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BsonValueSerializerBase.cs
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/* Copyright 2010-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.
*/
namespace MongoDB.Bson.Serialization.Serializers
{
/// <summary>
/// Represents a base class for BsonValue serializers.
/// </summary>
/// <typeparam name="TBsonValue">The type of the BsonValue.</typeparam>
public abstract class BsonValueSerializerBase<TBsonValue> : SerializerBase<TBsonValue> where TBsonValue : BsonValue
{
// private fields
private readonly BsonType? _bsonType;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="BsonValueSerializerBase{TBsonValue}"/> class.
/// </summary>
/// <param name="bsonType">The Bson type.</param>
protected BsonValueSerializerBase(BsonType? bsonType)
{
_bsonType = bsonType;
}
// public methods
/// <summary>
/// Deserializes a value.
/// </summary>
/// <param name="context">The deserialization context.</param>
/// <param name="args">The deserialization args.</param>
/// <returns>A deserialized value.</returns>
public override TBsonValue Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
if (_bsonType.HasValue)
{
EnsureBsonTypeEquals(context.Reader, _bsonType.Value);
}
return DeserializeValue(context, args);
}
/// <summary>
/// Serializes a value.
/// </summary>
/// <param name="context">The serialization context.</param>
/// <param name="args">The serialization args.</param>
/// <param name="value">The object.</param>
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, TBsonValue value)
{
if (value == null)
{
var message = string.Format(
"C# null values of type '{0}' cannot be serialized using a serializer of type '{1}'.",
BsonUtils.GetFriendlyTypeName(ValueType),
BsonUtils.GetFriendlyTypeName(GetType()));
throw new BsonSerializationException(message);
}
var actualType = value.GetType();
if (actualType != ValueType && !args.SerializeAsNominalType)
{
var serializer = BsonSerializer.LookupSerializer(actualType);
serializer.Serialize(context, value);
return;
}
SerializeValue(context, args, value);
}
// protected methods
/// <summary>
/// Deserializes a value.
/// </summary>
/// <param name="context">The deserialization context.</param>
/// <param name="args">The deserialization args.</param>
/// <returns>A deserialized value.</returns>
protected abstract TBsonValue DeserializeValue(BsonDeserializationContext context, BsonDeserializationArgs args);
/// <summary>
/// Serializes a value.
/// </summary>
/// <param name="context">The serialization context.</param>
/// <param name="args">The serialization args.</param>
/// <param name="value">The object.</param>
protected abstract void SerializeValue(BsonSerializationContext context, BsonSerializationArgs args, TBsonValue value);
}
}