commit 5a3ecb15663c8f5ce3e31ce385e8ab8a30ce44f2
author paulli <paul@prediction.io> Tue May 26 18:45:45 2015 +0800
committer paulli <paul@prediction.io> Tue May 26 18:45:45 2015 +0800
tree 40f2f07a06df663bd5215378e0b9133b9de78652
parent b7bd2df3aa5348271116c769f4cb47dd2b631605

fix evaluation serialization exception.

src/main/java/org/template/recommendation/Algorithm.java

diff --git a/src/main/java/org/template/recommendation/Algorithm.java b/src/main/java/org/template/recommendation/Algorithm.java
index 95f7c23..a9af2af 100644
--- a/src/main/java/org/template/recommendation/Algorithm.java
+++ b/src/main/java/org/template/recommendation/Algorithm.java
@@ -270,7 +270,7 @@
         itemScores = validScores(itemScores, query.getWhitelist(), query.getBlacklist(), query.getCategories(), model.getItems(), query.getUserEntityId());
         Collections.sort(itemScores, Collections.reverseOrder());
 
-        return itemScores.subList(0, Math.min(query.getNumber(), itemScores.size()));
+        return new ArrayList<>(itemScores.subList(0, Math.min(query.getNumber(), itemScores.size())));
     }
 
     private List<ItemScore> similarItems(final List<double[]> recentProductFeatures, Model model, Query query) {
@@ -289,13 +289,13 @@
         itemScores = validScores(itemScores, query.getWhitelist(), query.getBlacklist(), query.getCategories(), model.getItems(), query.getUserEntityId());
         Collections.sort(itemScores, Collections.reverseOrder());
 
-        return itemScores.subList(0, Math.min(query.getNumber(), itemScores.size()));
+        return new ArrayList<>(itemScores.subList(0, Math.min(query.getNumber(), itemScores.size())));
     }
 
     private List<ItemScore> mostPopularItems(Model model, Query query) {
         List<ItemScore> itemScores = validScores(model.getItemPopularityScore().collect(), query.getWhitelist(), query.getBlacklist(), query.getCategories(), model.getItems(), query.getUserEntityId());
         Collections.sort(itemScores, Collections.reverseOrder());
-        return itemScores.subList(0, Math.min(query.getNumber(), itemScores.size()));
+        return new ArrayList<>(itemScores.subList(0, Math.min(query.getNumber(), itemScores.size())));
     }
 
     private double cosineSimilarity(double[] a, double[] b) {