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ExpandoObjectSerializer.cs
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ExpandoObjectSerializer.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.Collections.Generic;
using System.Dynamic;
namespace MongoDB.Bson.Serialization.Serializers
{
/// <summary>
/// Serializer for <see cref="ExpandoObject"/>.
/// </summary>
/// <remarks>
/// The use of <see cref="ExpandoObject"/> will serialize any <see cref="List{Object}"/> without type information.
/// To get the best experience out of using an <see cref="ExpandoObject"/>, any member wanting to be used
/// as an array should use <see cref="List{Object}"/>.
/// </remarks>
public class ExpandoObjectSerializer : DynamicDocumentBaseSerializer<ExpandoObject>
{
// private fields
private readonly IBsonSerializer<List<object>> _listSerializer;
/// <summary>
/// Initializes a new instance of the <see cref="ExpandoObjectSerializer"/> class.
/// </summary>
public ExpandoObjectSerializer()
{
_listSerializer = BsonSerializer.LookupSerializer<List<object>>();
}
/// <summary>
/// Configures the deserialization context.
/// </summary>
/// <param name="builder">The builder.</param>
protected override void ConfigureDeserializationContext(BsonDeserializationContext.Builder builder)
{
builder.DynamicDocumentSerializer = this;
builder.DynamicArraySerializer = _listSerializer;
}
/// <summary>
/// Configures the serialization context.
/// </summary>
/// <param name="builder">The builder.</param>
protected override void ConfigureSerializationContext(BsonSerializationContext.Builder builder)
{
builder.IsDynamicType = t => t == typeof(ExpandoObject) || t == typeof(List<object>);
}
/// <summary>
/// Creates the document.
/// </summary>
/// <returns>
/// A <see cref="ExpandoObject"/>.
/// </returns>
protected override ExpandoObject CreateDocument()
{
return new ExpandoObject();
}
/// <summary>
/// Sets the value for the member.
/// </summary>
/// <param name="document">The document.</param>
/// <param name="memberName">Name of the member.</param>
/// <param name="value">The value.</param>
protected override void SetValueForMember(ExpandoObject document, string memberName, object value)
{
((IDictionary<string, object>)document)[memberName] = value;
}
/// <summary>
/// Tries to get the value for a member. Returns true if the member should be serialized.
/// </summary>
/// <param name="value">The value.</param>
/// <param name="memberName">Name of the member.</param>
/// <param name="memberValue">The member value.</param>
/// <returns><c>true</c> if the member should be serialized; otherwise <c>false</c>.</returns>
protected override bool TryGetValueForMember(ExpandoObject value, string memberName, out object memberValue)
{
return ((IDictionary<string, object>)value).TryGetValue(memberName, out memberValue);
}
}
}