/// <summary>
/// Inherits the properties from the selected <paramref name="inheritMapper"/>.
/// </summary>
/// <param name="inheritMapper">The <see cref="IDatabaseMapper"/> to inherit from.</param>
public void InheritPropertiesFrom <T>(IDatabaseMapper <T> inheritMapper) where T : class, new()
{
if (inheritMapper == null)
{
throw new ArgumentNullException(nameof(inheritMapper));
}
if (!SrceType.GetTypeInfo().IsSubclassOf(typeof(T)))
{
throw new ArgumentException($"Type {typeof(T).Name} must inherit from {SrceType.Name}.");
}
var pe = Expression.Parameter(SrceType, "x");
var type = typeof(DatabaseMapper <>).MakeGenericType(SrceType);
foreach (var p in inheritMapper.Mappings.OfType <IDatabasePropertyMapper>())
{
var lex = Expression.Lambda(Expression.Property(pe, p.SrcePropertyName), pe);
var pmap = (IDatabasePropertyMapper)type
.GetMethod("Property", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly)
.MakeGenericMethod(p.SrcePropertyType)
.Invoke(this, new object[] { lex, p.DestPropertyName, p.OperationTypes });
if (p.IsUniqueKey)
{
pmap.SetUniqueKey(p.IsUniqueKeyAutoGeneratedOnCreate);
}
pmap.DestDbType = p.DestDbType;
pmap.SetConverter(p.Converter);
pmap.SetMapper(p.Mapper);
}
}
/// <summary>
/// Initialises a new instance of the <see cref="ODataMapper{TSrce}"/> class.
/// </summary>
/// <param name="odataEntityName">The <b>OData</b> entity name as represented within the URL.</param>
public ODataMapper(string odataEntityName)
{
ODataEntityName = string.IsNullOrEmpty(odataEntityName) ? throw new ArgumentNullException(nameof(odataEntityName)) : odataEntityName;
if (typeof(IETag).IsAssignableFrom(typeof(TSrce)))
{
Property(x => ((IETag)x).ETag, ODataETagPropertyName).MapSrceToDestWhen((v) => false);
}
_hasDefaultCtor = SrceType.GetConstructor(Type.EmptyTypes) != null;
if (!_hasDefaultCtor)
{
// This is required to support the likes of compiler generated Types when using LINQ queries.
_orderedProperties = SrceType.GetProperties(BindingFlags.Public | BindingFlags.Instance).Select(x => x.Name).ToArray();
if (SrceType.GetConstructors().Where(x => x.GetParameters().Length == _orderedProperties.Length).Count() == 0)
{
throw new MapperException($"Type {SrceType.Name} does not have default constructor, or a constructor that accepts all properties; unable to determine constructor.");
}
}
}
/// <summary>
/// Automatically map commonly named properties.
/// </summary>
private void AutomagicallyMap(string[] ignoreSrceProperties)
{
MapperPropertyAttribute mpa = null;
foreach (var sp in SrceType.GetProperties(BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.SetProperty | BindingFlags.Instance))
{
// Do not auto-map where ignore has been specified.
if (ignoreSrceProperties.Contains(sp.Name))
{
continue;
}
if (sp.GetCustomAttributes(typeof(MapperIgnoreAttribute), true).OfType <MapperIgnoreAttribute>().FirstOrDefault() != null)
{
continue;
}
// Find corresponding property.
mpa = sp.GetCustomAttributes(typeof(MapperPropertyAttribute), true).OfType <MapperPropertyAttribute>().FirstOrDefault();
var dname = mpa == null || string.IsNullOrEmpty(mpa.Name) ? sp.Name : mpa.Name;
var dp = DestType.GetProperty(dname, BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.SetProperty | BindingFlags.Instance);
if (dp == null)
{
if (mpa != null)
{
throw new InvalidOperationException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with Name set to '{dname}' which does not exist for destination Type '{DestType.Name}'.");
}
continue;
}
// Create the lambda expressions for the property and add to the mapper.
var spe = Expression.Parameter(SrceType, "x");
var sex = Expression.Lambda(Expression.Property(spe, sp.Name), spe);
var dpe = Expression.Parameter(DestType, "x");
var dex = Expression.Lambda(Expression.Property(dpe, dname), dpe);
var pmap = (IPropertyMapper <TSrce, TDest>) typeof(EntityMapper <TSrce, TDest>)
.GetMethod("PropertySrceAndDest", BindingFlags.NonPublic | BindingFlags.Instance)
.MakeGenericMethod(new Type[] { sp.PropertyType, dp.PropertyType })
.Invoke(this, new object[] { sex, dex });
if (mpa == null)
{
continue;
}
// Apply auto-map Property attribute IsUnique configuration.
if (mpa.IsUniqueKey)
{
pmap.SetUniqueKey(mpa.IsUniqueKeyAutoGeneratedOnCreate);
}
// Apply auto-map Property attribute ConverterType configuration.
if (mpa.ConverterType != null)
{
if (!typeof(IPropertyMapperConverter).IsAssignableFrom(mpa.ConverterType))
{
throw new MapperException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with ConverterType set to '{mpa.ConverterType.Name}' which does not implement 'IPropertyMapperConverter'.");
}
IPropertyMapperConverter pmc = null;
var pdef = mpa.ConverterType.GetProperty("Default", BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Static);
if (pdef == null)
{
if (mpa.ConverterType.GetConstructor(Type.EmptyTypes) == null)
{
throw new MapperException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with ConverterType set to '{mpa.ConverterType.Name}' does not have a static 'Default' property or default constructor.");
}
pmc = (IPropertyMapperConverter)Activator.CreateInstance(mpa.ConverterType);
}
else
{
pmc = (IPropertyMapperConverter)pdef.GetValue(null);
}
pmap.SetConverter(pmc);
continue;
}
// Apply auto-map Property attribute MapperType configuration for complex types.
if (pmap.IsSrceComplexType)
{
IEntityMapperBase em = null;
if (mpa.MapperType != null)
{
if (!typeof(IEntityMapperBase).IsAssignableFrom(mpa.MapperType))
{
throw new MapperException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.MapperType.Name}' which does not implement 'IEntityMapper'.");
}
var mdef = mpa.MapperType.GetProperty("Default", BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Static);
if (mdef == null)
{
if (mpa.ConverterType.GetConstructor(Type.EmptyTypes) == null)
{
throw new MapperException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.MapperType.Name}' does not have a static 'Default' property or default constructor.");
}
em = (IEntityMapperBase)Activator.CreateInstance(mpa.MapperType);
}
else
{
em = (IEntityMapperBase)mdef.GetValue(null);
}
}
if (em != null)
{
pmap.SetMapper(em);
}
}
else if (mpa.MapperType != null)
{
throw new MapperException($"Type '{SrceType.Name}' Property '{sp.Name}' has 'MapperPropertyAttribute' with MapperType set to '{mpa.ConverterType.Name}' although the property is not a complex type.");
}
}
}