小编Sun*_*mar的帖子

我正在处理一些具有大量要定义的常量的代码。它主要处理Marketplace常量（可以是美国，英国，印度，日本），并且与之相关MarketplaceMerchantMapping，基本上将a映射为MerchantIDa MarketplaceID。

例如：

public enum Marketplace {

    US("US"),
    JP("JP"),
    UK("UK"),
    IN("IN"),
    NZ("NZ"),
    CA("CA"),
    FR("FR"),
    ... 
    ...

  // This could go up to some 400 marketplaces

    private final String stringValue;

    public boolean isWest() {
        return this == US || this == CA || this == UK;
    }

    public boolean isEast() {
        return this == IN || this == NZ || this == JP;
    }

}

public enum MarketplaceMerchantMapping {

    USMAP(MarketplaceID.US, MerchantID.US, Marketplace.US),
    JPMAP(MarketplaceID.JP, MerchantID.JP, …