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BsonSerializationOptionsAttribute.cs
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BsonSerializationOptionsAttribute.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.
*/
using System;
namespace MongoDB.Bson.Serialization.Attributes
{
/// <summary>
/// Abstract base class for serialization options attributes.
/// </summary>
public abstract class BsonSerializationOptionsAttribute : Attribute, IBsonMemberMapAttribute
{
// constructors
/// <summary>
/// Initializes a new instance of the BsonSerializationOptionsAttribute class.
/// </summary>
protected BsonSerializationOptionsAttribute()
{
}
// public methods
/// <summary>
/// Applies a modification to the member map.
/// </summary>
/// <param name="memberMap">The member map.</param>
public virtual void Apply(BsonMemberMap memberMap)
{
var serializer = memberMap.GetSerializer();
var reconfiguredSerializer = Apply(serializer);
memberMap.SetSerializer(reconfiguredSerializer);
}
// protected methods
/// <summary>
/// Reconfigures the specified serializer by applying this attribute to it.
/// </summary>
/// <param name="serializer">The serializer.</param>
/// <returns>A reconfigured serializer.</returns>
/// <exception cref="System.NotSupportedException"></exception>
protected virtual IBsonSerializer Apply(IBsonSerializer serializer)
{
// if none of the overrides applied the attribute to the serializer see if it can be applied to a child serializer
var childSerializerConfigurable = serializer as IChildSerializerConfigurable;
if (childSerializerConfigurable != null)
{
var childSerializer = childSerializerConfigurable.ChildSerializer;
var reconfiguredChildSerializer = Apply(childSerializer);
return childSerializerConfigurable.WithChildSerializer(reconfiguredChildSerializer);
}
var message = string.Format(
"A serializer of type '{0}' is not configurable using an attribute of type '{1}'.",
BsonUtils.GetFriendlyTypeName(serializer.GetType()),
BsonUtils.GetFriendlyTypeName(this.GetType()));
throw new NotSupportedException(message);
}
}
}