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1
21 package com.db4o.test;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25
26 public class SortedSameOrder {
27 private static class Sortable {
28 private String  a;
29
30 public Sortable(String a) {
31 this.a = a;
32 }
33
34 public String toString() {
35 return a;
36 }
37 }
38
39 private static class SortableComparator implements QueryComparator {
40 public int compare(Object first, Object second) {
41 return ((Sortable)first).a.compareTo(((Sortable)second).a);
42 }
43 }
44
45 public void store() {
46 Test.store(new Sortable("a"));
47 Test.store(new Sortable("c"));
48 Test.store(new Sortable("b"));
49 }
50
51 public void test() {
52 Query query=Test.query();
53 query.constrain(Sortable.class);
54 SortableComparator cmp = new SortableComparator();
55 query.sortBy(cmp);
56 ObjectSet result=query.execute();
57
58 Object last=null;
59 while(result.hasNext()) {
60 Object cur=result.next();
61 Test.ensure(last==null||cmp.compare(last,cur)<=0);
62 last=cur;
63 }
64 last=null;
65 for (int i=0;i<result.size();i++) {
66 Object cur = result.get(i);
67 Test.ensure(last==null||cmp.compare(last,cur)<=0);
68 last=cur;
69 }
70 }
71 }
72 |
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