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NamedIdMemberConvention.cs
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NamedIdMemberConvention.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;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
namespace MongoDB.Bson.Serialization.Conventions
{
/// <summary>
/// A convention that finds the id member by name.
/// </summary>
public class NamedIdMemberConvention : ConventionBase, IClassMapConvention
{
// private fields
private readonly IEnumerable<string> _names;
private readonly MemberTypes _memberTypes;
private readonly BindingFlags _bindingFlags;
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="NamedIdMemberConvention" /> class.
/// </summary>
/// <param name="names">The names.</param>
public NamedIdMemberConvention(params string[] names)
: this((IEnumerable<string>)names)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="NamedIdMemberConvention" /> class.
/// </summary>
/// <param name="names">The names.</param>
public NamedIdMemberConvention(IEnumerable<string> names)
: this(names, BindingFlags.Instance | BindingFlags.Public)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="NamedIdMemberConvention" /> class.
/// </summary>
/// <param name="names">The names.</param>
/// <param name="memberTypes">The member types.</param>
public NamedIdMemberConvention(IEnumerable<string> names, MemberTypes memberTypes)
: this(names, memberTypes, BindingFlags.Instance | BindingFlags.Public)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="NamedIdMemberConvention" /> class.
/// </summary>
/// <param name="names">The names.</param>
/// <param name="bindingFlags">The binding flags.</param>
public NamedIdMemberConvention(IEnumerable<string> names, BindingFlags bindingFlags)
: this(names, MemberTypes.Field | MemberTypes.Property, bindingFlags)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="NamedIdMemberConvention" /> class.
/// </summary>
/// <param name="names">The names.</param>
/// <param name="memberTypes">The member types.</param>
/// <param name="bindingFlags">The binding flags.</param>
/// <exception cref="System.ArgumentNullException"></exception>
public NamedIdMemberConvention(IEnumerable<string> names, MemberTypes memberTypes, BindingFlags bindingFlags)
{
if (names == null)
{
throw new ArgumentNullException("names");
}
_names = names;
_memberTypes = memberTypes;
_bindingFlags = bindingFlags | BindingFlags.DeclaredOnly;
}
// public methods
/// <summary>
/// Applies a modification to the class map.
/// </summary>
/// <param name="classMap">The class map.</param>
public void Apply(BsonClassMap classMap)
{
var classTypeInfo = classMap.ClassType.GetTypeInfo();
foreach (var name in _names)
{
var member = classTypeInfo.GetMember(name, _memberTypes, _bindingFlags).SingleOrDefault();
if (member != null)
{
if (IsValidIdMember(classMap, member))
{
classMap.MapIdMember(member);
return;
}
}
}
}
private bool IsValidIdMember(BsonClassMap classMap, MemberInfo member)
{
if (member is PropertyInfo)
{
var getMethodInfo = ((PropertyInfo)member).GetMethod;
if (getMethodInfo == null ||
getMethodInfo.IsVirtual &&
getMethodInfo.GetBaseDefinition().DeclaringType != classMap.ClassType)
{
return false;
}
}
return true;
}
}
}