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1
21 package com.db4o.test;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25
26
27 public class MultiLevelIndex {
28
29 public MultiLevelIndex _child;
30 public int _i;
31 public int _level;
32
33 public void configure(){
34 Db4o.configure().objectClass(this).objectField("_child").indexed(true);
35 Db4o.configure().objectClass(this).objectField("_i").indexed(true);
36 }
37
38 public void store(){
39 Test.deleteAllInstances(this);
40 store1(3);
41 store1(2);
42 store1(5);
43 store1(1);
44 for (int i = 6; i < 103; i++) {
45 store1(i);
46 }
47 }
48
49 private void store1(int val){
50 MultiLevelIndex root = new MultiLevelIndex();
51 root._i = val;
52 root._child = new MultiLevelIndex();
53 root._child._level = 1;
54 root._child._i = - val ;
55 Test.store(root);
56 }
57
58 public void test(){
59 Query q = Test.query();
60 q.constrain(MultiLevelIndex.class);
61 q.descend("_child").descend("_i").constrain(new Integer  (- 102));
62 long start = System.currentTimeMillis();
63 ObjectSet objectSet = q.execute();
64 long stop = System.currentTimeMillis();
65 long duration = stop - start;
66 System.out.println("MultiLevelIndex time: " + duration + "ms");
67
68
69 Test.ensure(objectSet.size() == 1);
70 MultiLevelIndex mli = (MultiLevelIndex)objectSet.next();
71 Test.ensure(mli._i == 102);
72
73 }
74
75
76
77
78 }
79 |
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