01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.test;
22:
23: import java.util.*;
24:
25: import com.db4o.query.*;
26:
27: /**
28: *
29: */
30: public class NestedLists {
31:
32: static final int DEPTH = 10;
33:
34: List list;
35: String name;
36:
37: public void storeOne() {
38: nest(DEPTH);
39: name = "root";
40: }
41:
42: private void nest(int depth) {
43: if (depth > 0) {
44: list = Test.objectContainer().collections().newLinkedList();
45: NestedLists nl = new NestedLists();
46: nl.name = "nested";
47: nl.nest(depth - 1);
48: list.add(nl);
49: }
50: }
51:
52: public void test() {
53: Query q = Test.query();
54: q.constrain(NestedLists.class);
55: q.descend("name").constrain("root");
56: NestedLists nl = (NestedLists) q.execute().next();
57: for (int i = 0; i < DEPTH - 1; i++) {
58: nl = nl.checkNest();
59: }
60: }
61:
62: private NestedLists checkNest() {
63: Test.ensure(list != null);
64: NestedLists nl = (NestedLists) list.get(0);
65: Test.ensure(nl.name.equals("nested"));
66: return nl;
67: }
68:
69: public String toString() {
70: String str = "NestedList ";
71: if (name != null) {
72: str += name;
73: }
74: if (list != null) {
75: str += " list valid";
76: } else {
77: str += " list INVALID";
78: }
79: return str;
80: }
81:
82: }
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