forked from samus/mongodb-csharp
/
MemberFinderBase.cs
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/
MemberFinderBase.cs
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using System;
using System.Reflection;
namespace MongoDB.Configuration.Mapping.Conventions
{
/// <summary>
///
/// </summary>
public abstract class MemberFinderBase
{
private readonly BindingFlags _bindingFlags;
private readonly MemberTypes _memberTypes;
private readonly Func<MemberInfo, bool> _predicate;
/// <summary>
/// Initializes a new instance of the <see cref="MemberFinderBase"/> class.
/// </summary>
/// <param name="predicate">The predicate.</param>
protected MemberFinderBase(Func<MemberInfo, bool> predicate)
: this(predicate, MemberTypes.Property, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
{ }
/// <summary>
/// Initializes a new instance of the <see cref="MemberFinderBase"/> class.
/// </summary>
/// <param name="predicate">The predicate.</param>
/// <param name="memberTypes">The member types.</param>
/// <param name="bindingFlags">The binding flags.</param>
protected MemberFinderBase(Func<MemberInfo, bool> predicate, MemberTypes memberTypes, BindingFlags bindingFlags)
{
_bindingFlags = bindingFlags;
_memberTypes = memberTypes;
_predicate = predicate;
}
/// <summary>
/// Gets the member representing the id if one exists.
/// </summary>
/// <param name="type">The type.</param>
/// <returns></returns>
protected MemberInfo GetMember(Type type)
{
var foundMembers = type.FindMembers(_memberTypes, _bindingFlags, IsMatch, null);
if (foundMembers.Length == 0)
return null;
if (foundMembers.Length == 1)
return foundMembers[0];
//Todo: use custom exception
throw new Exception("Too many members found matching the criteria.");
}
/// <summary>
/// Determines whether the specified member info is match.
/// </summary>
/// <param name="memberInfo">The member info.</param>
/// <param name="criteria">The criteria.</param>
/// <returns>
/// <c>true</c> if the specified member info is match; otherwise, <c>false</c>.
/// </returns>
private bool IsMatch(MemberInfo memberInfo, object criteria)
{
return _predicate(memberInfo);
}
}
}