关于Delphi XE中DataSnap的新
article解释说DataSnap现在能够在服务器和客户端之间传输TObject后代,类似于POJO的Java企业版概念(“普通旧Java对象”).
如果这样的PODO具有需要初始化的嵌套对象类型属性(例如TStrings属性),这个新功能是否有用？所有这些子对象是否会被序列化并以其当前值传输？那些系统资源属性,如TFileStream,THandle或TThread,在序列化对象中没有意义,它们可以标记为“不可序列化”吗？
These are the fields for which there
is already a built-in
conversion/reversion: integer,string,
char,enumeration,float,object,
record. For the following types,the
field values are ignored and user
conversion is expected: set,method,
variant,interface,pointer,dynArray,
classRef,array.
解决方法
我没有试过自己,但是看了
documentation它似乎会序列化任何东西,尽管你可能需要编写一个自定义转换器.下面的代码包含子对象,作为需要自定义转换器的对象的示例.
type
TAddress = record
FStreet: String;
FCity: String;
FCode: String;
FCountry: String;
FDescription: TStringList;
end;
TPerson = class
private
FName: string;
FHeight: integer;
FAddress: TAddress;
FSex: char;
FRetired: boolean;
FChildren: array of TPerson;
FNumbers: set of 1..10;
public
constructor Create;
destructor Destroy; override;
procedure AddChild(kid: TPerson);
end;