/// <summary>
/// Fluent syntax for defining a property mapping. Use in the constructor.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="propertyExpression">The property expression.</param>
/// <returns>mapping to configure.</returns>
public FluentPropertyMapping <TEntity, TProperty> Property <TProperty>(Expression <Func <TEntity, TProperty> > propertyExpression)
{
var propertyInfo = propertyExpression.GetPropertyInfo();
if (_mappings.ContainsKey(propertyInfo.Name))
{
return(new FluentPropertyMapping <TEntity, TProperty>((PropertyMapping <TEntity>)_mappings[propertyInfo.Name]));
}
var setter = BuildSetter(typeof(TEntity), propertyInfo);
var getter = BuildGetter(typeof(TEntity), propertyInfo);
var mapping = new PropertyMapping <TEntity>(propertyInfo.Name, setter, getter)
{
PropertyType = propertyInfo.PropertyType
};
_mappings.Add(propertyInfo.Name, mapping);
return(new FluentPropertyMapping <TEntity, TProperty>(mapping));
}
private void MapProperties(Type type)
{
var properties =
typeof(TEntity).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
foreach (var property in properties)
{
var method = property.GetSetMethod(true);
Action <TEntity, object> setter;
if (method == null)
{
var field = type.GetField("_" + char.ToLower(property.Name[0]) + property.Name.Substring(1),
BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
if (field == null)
{
continue;
}
var instance = Expression.Parameter(typeof(TEntity), "instance");
var value = Expression.Parameter(typeof(object), "value");
var result =
Expression.Lambda <Action <TEntity, object> >(
Expression.Assign(
Expression.Field(instance, field),
Expression.Convert(value, field.FieldType)),
instance,
value).Compile();
setter = result;
}
else
{
var instance = Expression.Parameter(typeof(TEntity), "i");
var argument = Expression.Parameter(typeof(object), "a");
var setterCall = Expression.Call(
instance,
method,
Expression.Convert(argument, property.PropertyType));
var result = (Action <TEntity, object>)Expression.Lambda(setterCall, instance, argument)
.Compile();
//var m = method;
//setter = (instance, value) => m.Invoke(instance, new[] { value });
setter = result;
}
method = property.GetGetMethod(true);
Func <TEntity, object> getter;
if (method == null)
{
var field = type.GetField("_" + char.ToLower(property.Name[0]) + property.Name.Substring(1),
BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
if (field == null)
{
continue;
}
//getter = field.GetValue;
var paramExpression = Expression.Parameter(typeof(TEntity), "instance");
Expression fieldGetter = Expression.Field(paramExpression, field.Name);
if (field.FieldType.IsPrimitive)
{
fieldGetter = Expression.Convert(fieldGetter, typeof(object));
}
var result =
Expression.Lambda <Func <TEntity, object> >(fieldGetter, paramExpression).Compile();
getter = result;
}
else
{
//var m = method;
//getter = (instance) => m.Invoke(instance, null);
var instance = Expression.Parameter(typeof(TEntity), "i");
var prop = Expression.Property(instance, property);
var convert = Expression.TypeAs(prop, typeof(object));
var result = (Func <TEntity, object>)Expression.Lambda(convert, instance).Compile();
getter = result;
}
var mapping = new PropertyMapping <TEntity>(property.Name, setter, getter);
_mappings.Add(property.Name, mapping);
}
}
