49.9. 6.KeyValuePairField

KeyValuePairField 注解定义键值对字段的属性。每个 KeyValuePairField 都由一个标签(= key)及其关联的值标识，一个类型（字符串，int, date, …​）、可选模式以及是否需要字段

问题单 1：标签

这个参数代表消息中字段的密钥

FIX message - Tag

@Message(keyValuePairSeparator = "=", pairSeparator = "\u0001", type="FIX", version="4.1")
public class Order {

    @Link Header header;

    @Link Trailer trailer;

    @KeyValuePairField(tag = 1) // Client reference
    private String Account;

    @KeyValuePairField(tag = 11) // Order reference
    private String ClOrdId;

    @KeyValuePairField(tag = 22) // Fund ID type (Sedol, ISIN, ...)
    private String IDSource;

    @KeyValuePairField(tag = 48) // Fund code
    private String SecurityId;

    @KeyValuePairField(tag = 54) // Movement type ( 1 = Buy, 2 = sell)
    private String Side;

    @KeyValuePairField(tag = 58) // Free text
    private String Text;
}

case 2：输出中的不同位置

如果我们放入 FIX 消息中的标签/密钥必须按照预定义的顺序排序，则使用注释 @KeyValuePairField 的属性"position"

FIX message - Tag - sort

@Message(keyValuePairSeparator = "=", pairSeparator = "\\u0001", type = "FIX", version = "4.1", isOrdered = true)
public class Order {

    @Link Header header;

    @Link Trailer trailer;

    @KeyValuePairField(tag = 1, position = 1) // Client reference
    private String account;

    @KeyValuePairField(tag = 11, position = 3) // Order reference
    private String clOrdId;
}