sort util 封装数组或者集合 固定的排序方法

[venusdrogon]

[venusdrogon]

  //设置productType
            try{
                Collections.sort(
                                itemType,
                                new FixedOrderComparator<>(
                                                StoPropertyConstants.PRPT_ITEM_HYPELAUNCH,
                                                StoPropertyConstants.PRPT_ITEM_MIADIDAS_VALUE_EN,
                                                StoPropertyConstants.PRPT_ITEM_PRESONALLZATION_CODE,
                                                StoPropertyConstants.PRPT_ITEM_PERSALES_CODE,
                                                StoPropertyConstants.PRPT_ITEM_VIP_CODE,
                                                StoPropertyConstants.PRPT_ITEM_COMINGSOON_CODE,
                                                StoPropertyConstants.PRPT_ITEM_DISCOUNT_CODE,
                                                StoPropertyConstants.PRPT_ITEM_NORMAL_CODE,
                                                StoPropertyConstants.PRPT_ITEM_NOSALE));
            }catch (Exception e){
                LOGGER.error("itemType sort error:{},itemType:{}", e, JsonUtil.format(itemType));
            }

[2019-07-28 16:11:31:692 CST] ERROR com.**.store.manager.product.StoRecommendManagerImpl.getRecommendItemCommands(StoRecommendManagerImpl.java:436) : itemType sort error:java.lang.IllegalArgumentException: Attempting to compare unknown object Sale,itemType:    [
        "Normal",
        "Sale"
    ]
[2019-07-28 16:11:32:776 CST] ERROR com.**.store.manager.product.StoRecommendManagerImpl.getRecommendItemCommands(StoRecommendManagerImpl.java:436) : itemType sort error:java.lang.IllegalArgumentException: Attempting to compare unknown object Sale,itemType:    [
        "Normal",
        "Sale"
    ]

[venusdrogon]

对 集合 list 按照指定的固定顺序 fixedOrderItems 进行排序.

说明:
默认使用的是 UnknownObjectBehavior.AFTER ,不在指定固定顺序的元素将排在后面
示例:
assertThat(
sortListByFixedOrderArray(toList("张飞", "关羽", "刘备"), toArray("刘备", "张飞", "关羽")), //
contains("刘备", "张飞", "关羽"));

重构:
对于以下代码:

try{
Collections.sort(
list,
new FixedOrderComparator<>(
StoPropertyConstants.PRPT_ITEM_HYPELAUNCH,
StoPropertyConstants.PRPT_ITEM_MIADIDAS_VALUE_EN,
StoPropertyConstants.PRPT_ITEM_PRESONALLZATION_CODE,
StoPropertyConstants.PRPT_ITEM_PERSALES_CODE,
StoPropertyConstants.PRPT_ITEM_VIP_CODE,
StoPropertyConstants.PRPT_ITEM_COMINGSOON_CODE,
StoPropertyConstants.PRPT_ITEM_DISCOUNT_CODE,
StoPropertyConstants.PRPT_ITEM_NORMAL_CODE,
StoPropertyConstants.PRPT_ITEM_NOSALE));
}catch (Exception e){
LOGGER.error("itemType sort error:{},itemType:{}", e, JsonUtil.format(itemType));
}

可以重构成:
com.feilong.core.util.SortUtil.sortListByFixedOrderArray(
list,
StoPropertyConstants.PRPT_ITEM_HYPELAUNCH,
StoPropertyConstants.PRPT_ITEM_MIADIDAS_VALUE_EN,
StoPropertyConstants.PRPT_ITEM_PRESONALLZATION_CODE,
StoPropertyConstants.PRPT_ITEM_PERSALES_CODE,
StoPropertyConstants.PRPT_ITEM_VIP_CODE,
StoPropertyConstants.PRPT_ITEM_COMINGSOON_CODE,
StoPropertyConstants.PRPT_ITEM_DISCOUNT_CODE,
StoPropertyConstants.PRPT_ITEM_NORMAL_CODE,
StoPropertyConstants.PRPT_ITEM_NOSALE);

Type Parameters:
the generic type
Parameters:
list the list
fixedOrderItems the fixed order items
Returns:
如果 list 是null,返回 Collections.emptyList()
如果 list 是empty,返回 list
如果 fixedOrderItems 是null或者是 empty,返回 list
Since:
1.14.3
See Also:
java.util.Collections.sort(List)