/// <summary>
/// 初始化 <see cref="EntityMetadata"/> 类的新实例。
/// </summary>
/// <param name="entityType">一个实体的类型。</param>
internal EntityMetadata(Type entityType)
{
EntityType = entityType;
//获取描述表名称映射的 EntityMappingAttribute
var mapper = entityType.GetCustomAttributes <EntityMappingAttribute>(true).FirstOrDefault();
if (mapper != null)
{
TableName = mapper.TableName;
Description = mapper.Description;
}
else
{
TableName = entityType.Name;
}
//获取描述树结构映射的 EntityTreeMappingAttribute
var treeMapper = entityType.GetCustomAttributes <EntityTreeMappingAttribute>().FirstOrDefault();
if (treeMapper != null)
{
EntityTree = new EntityTreeMetadata(treeMapper);
}
//获取表名称变量映射的 EntityVariableAttribute
var varMapper = entityType.GetCustomAttributes <EntityVariableAttribute>().FirstOrDefault();
if (varMapper != null)
{
TableName = varMapper.Expression.Replace("$", TableName);
}
}
/// <summary>
/// 使用实体类型和 <see cref="EntityTreeMappingAttribute"/> 对象创建一个 <see cref="EntityTreeMetadata"/> 对象。
/// </summary>
/// <param name="attribute"></param>
/// <param name="entityType"></param>
/// <returns></returns>
public static EntityTreeMetadata CreateMetadata(Type entityType, EntityTreeMappingAttribute attribute)
{
var metadata = new EntityTreeMetadata(attribute);
IProperty property;
if (!string.IsNullOrEmpty(attribute.InnerSign) &&
(property = PropertyUnity.GetProperty(entityType, attribute.InnerSign)) != null)
{
metadata.InnerSign = property;
}
if (!string.IsNullOrEmpty(attribute.Level) &&
(property = PropertyUnity.GetProperty(entityType, attribute.Level)) != null)
{
metadata.Level = property;
}
if (!string.IsNullOrEmpty(attribute.Order) &&
(property = PropertyUnity.GetProperty(entityType, attribute.Order)) != null)
{
metadata.Order = property;
}
if (!string.IsNullOrEmpty(attribute.Name) &&
(property = PropertyUnity.GetProperty(entityType, attribute.Name)) != null)
{
metadata.Name = property;
}
if (!string.IsNullOrEmpty(attribute.FullName) &&
(property = PropertyUnity.GetProperty(entityType, attribute.FullName)) != null)
{
metadata.FullName = property;
}
return(metadata);
}
