1 /**
2 * Copyright (c) 2008-2012, http://www.snakeyaml.org
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.yaml.snakeyaml.issues.issue133;
17
18 import java.awt.Point;
19
20 import junit.framework.TestCase;
21
22 import org.yaml.snakeyaml.Yaml;
23 import org.yaml.snakeyaml.introspector.Property;
24 import org.yaml.snakeyaml.nodes.NodeTuple;
25 import org.yaml.snakeyaml.nodes.Tag;
26 import org.yaml.snakeyaml.representer.Representer;
27
28 /**
29 * to test http://code.google.com/p/snakeyaml/issues/detail?id=133
30 */
31 public class StackOverflowTest extends TestCase {
32 public void testDumpRecursiveObject() {
33 try {
34 Yaml yaml = new Yaml();
35 // by default it must fail with StackOverflow
36 yaml.dump(new Point());
37 fail("getLocation() is recursive.");
38 } catch (Throwable e) {
39 assertNull("StackOverflow has no message: " + e.getMessage(), e.getMessage());
40 }
41 }
42
43 /**
44 * Since Point.getLocation() creates a new instance of Point class,
45 * SnakeYAML will fail to dump an instance of Point if 'getLocation()' is
46 * also included.
47 *
48 * Since Point is not really a JavaBean, we can safely skip the recursive
49 * property when we dump the instance of Point.
50 */
51 private class PointRepresenter extends Representer {
52
53 @Override
54 protected NodeTuple representJavaBeanProperty(Object javaBean, Property property,
55 Object propertyValue, Tag customTag) {
56 if (javaBean instanceof Point && "location".equals(property.getName())) {
57 return null;
58 } else {
59 return super
60 .representJavaBeanProperty(javaBean, property, propertyValue, customTag);
61 }
62 }
63 }
64
65 public void testDump() {
66 Yaml yaml = new Yaml(new PointRepresenter());
67 String output = yaml.dump(new Point());
68 assertEquals("!!java.awt.Point {x: 0, y: 0}\n", output);
69 }
70 }