/// <summary>
/// 注册特殊的实体属性，这类属性为附加自实体间关系的不可持久化的属性。
/// </summary>
/// <typeparam name="TEntity">实体的类型。</typeparam>
/// <param name="expression">指定注册的属性的表达式。</param>
/// <param name="referenceProperty">参数或引用的属性。</param>
/// <param name="options">关联选项。</param>
/// <returns>一个 <see cref="IProperty"/> 对象。</returns>
public static IProperty RegisterSupposedProperty <TEntity>(Expression <Func <TEntity, object> > expression, IProperty referenceProperty = null, RelationOptions options = null) where TEntity : IEntity
{
var propertyInfo = PropertySearchVisitor.FindProperty(expression);
if (propertyInfo == null)
{
throw new InvalidOperationException(SR.GetString(SRKind.InvalidRegisterExpression));
}
return(RegisterSupposedProperty(propertyInfo, typeof(TEntity), referenceProperty, options));
}
/// <summary>
/// 注册基本的实体属性。
/// </summary>
/// <typeparam name="TEntity">实体的类型。</typeparam>
/// <param name="expression">指定注册的属性的表达式。</param>
/// <param name="info">属性映射信息。</param>
/// <returns>一个 <see cref="IProperty"/> 对象。</returns>
public static IProperty RegisterProperty <TEntity>(Expression <Func <TEntity, object> > expression, PropertyMapInfo info = null) where TEntity : IEntity
{
var propertyInfo = PropertySearchVisitor.FindProperty(expression);
if (propertyInfo == null)
{
throw new InvalidOperationException(SR.GetString(SRKind.InvalidRegisterExpression));
}
return(RegisterProperty(propertyInfo, typeof(TEntity), info));
}
internal static PropertyInfo FindProperty(Expression expression)
{
if (!(expression is LambdaExpression lambda))
{
return(null);
}
var visitor = new PropertySearchVisitor {
entityType = lambda.Parameters[0].Type
};
visitor.Visit(expression);
return(visitor.propertyInfo);
}
