优化innerJoin方法

 package com.yoho.search.recall.scene.beans.persional;
 
+import com.yoho.search.base.utils.CollectionUtils;
+import com.yoho.search.base.utils.Transfer;
 import com.yoho.search.core.personalized.models.SortPriceArea;
 import com.yoho.search.core.personalized.models.UserPersionalFactorRsp;
 import com.yoho.search.recall.scene.models.PagePersionalFactor;
@@ -11,6 +13,7 @@ import org.springframework.stereotype.Component;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 @Component
 public class QueryUserPersionalFactorBean {
@@ -35,8 +38,8 @@ public class QueryUserPersionalFactorBean {
             //2、获取用户的个性化因子
             UserPersionalFactorRsp userFactor = userComponent.queryUserPersionalFactor(recallParams.getUid(), recallParams.getUdid());
             //3、join获取最终的结果
-            List<Integer> brandIds = this.innerJoin(pageFactor.getBrandIds(),userFactor.getBrandIds(),10);
-            List<SortPriceArea> sortPriceAreas = this.innerJoin(pageFactor.getSortPriceAreas(),userFactor.getSortPriceAreas(),5);
+            List<Integer> brandIds = this.innerJoin(pageFactor.getBrandIds(),userFactor.getBrandIds(),brandIdMapkeyTransfer,10);
+            List<SortPriceArea> sortPriceAreas = this.innerJoin(pageFactor.getSortPriceAreas(),userFactor.getSortPriceAreas(),sortPriceMapkeyTransfer,5);
             return new UserPersionalFactorRsp(brandIds, sortPriceAreas,userFactor.getVector());
         }catch (Exception e){
             logger.error(e.getMessage());
@@ -44,11 +47,32 @@ public class QueryUserPersionalFactorBean {
         }
     }
 
-    private <T> List<T> innerJoin(List<T> aList,List<T> bList,int size) {
+    static Transfer<Integer,String> brandIdMapkeyTransfer = new Transfer<Integer, String>() {
+        @Override
+        public String transfer(Integer brandId) {
+            return String.valueOf(brandId);
+        }
+    };
+
+    static Transfer<SortPriceArea,String> sortPriceMapkeyTransfer = new Transfer<SortPriceArea, String>() {
+        @Override
+        public String transfer(SortPriceArea sortPriceArea) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(sortPriceArea.getMiddleSortId());
+            sb.append(":");
+            sb.append(sortPriceArea.getPriceArea());
+            return sb.toString();
+        }
+    };
+
+
+    private <T> List<T> innerJoin(List<T> aList, List<T> bList, Transfer<T,String> mapKeyTransfer,int size) {
+        Map<String,T> aKeyValueMap =  CollectionUtils.toMap(aList,mapKeyTransfer);
         List<T> results = new ArrayList<T>();
-        for (T a : aList) {
-            if (bList.contains(a)) {
-                results.add(a);
+        for (T b : bList) {
+            String bKey = mapKeyTransfer.transfer(b);
+            if (aKeyValueMap.containsKey(bKey)) {
+                results.add(aKeyValueMap.get(bKey));
             }
             if (results.size() >= size) {
                 break;