//根据成员元数据创建集合实例对象
private object CreateCollectionInstance(CollectionOutputInfo item)
{
var propertyMember = item.Parent.Metadata.ComplexMembers[item.Index];
var propertyType = propertyMember.Member.PropertyType;
if (propertyType.IsInterface)
{
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(IGrouping <,>))
{
var collectionType = typeof(GroupCollectionImpl <,>).MakeGenericType(propertyType.GetGenericArguments());
return(Activator.CreateInstance(collectionType));
}
else
{
var collectionType = typeof(HashSet <>).MakeGenericType(item.Metadata.ClrType);
return(Activator.CreateInstance(collectionType));
}
}
else if (propertyType.IsClass)
{
return(Activator.CreateInstance(propertyType));
}
else
{
throw new OutputException(this, string.Format(Res.NotSupportedInstanceType, propertyType));
}
}
/// <summary>
/// 创建输出集合内容。
/// </summary>
/// <param name="output">所在的集合输出信息对象。</param>
/// <param name="target">实际集合目标。</param>
public OutputContentCollection(CollectionOutputInfo output, object target)
{
Output = output;
Target = target as IEnumerable <object>;
KeyCollection = new Dictionary <string, OutputContentItem>();
}
/// <summary>
/// 创建输出集合内容。
/// </summary>
/// <param name="output">所在的集合输出信息对象。</param>
/// <param name="target">实际集合目标。</param>
public OutputContentCollection(CollectionOutputInfo output, object target)
{
Output = output;
Content = target;
}