示例#1
0
        /// <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);
        }