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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 examples;
17  
18  import java.math.BigDecimal;
19  import java.util.regex.Pattern;
20  
21  import junit.framework.TestCase;
22  
23  import org.yaml.snakeyaml.Yaml;
24  import org.yaml.snakeyaml.constructor.Constructor;
25  import org.yaml.snakeyaml.nodes.Node;
26  import org.yaml.snakeyaml.nodes.NodeId;
27  import org.yaml.snakeyaml.nodes.ScalarNode;
28  
29  /**
30   * http://code.google.com/p/snakeyaml/issues/detail?id=75
31   */
32  public class CustomBeanResolverTest extends TestCase {
33      private final Pattern CUSTOM_PATTERN = Pattern.compile("\\d+%");
34  
35      public void testOnlyBigDecimal() {
36          Yaml yaml = new Yaml(new BigBeanConstructor());
37          Foo foo = (Foo) yaml.load("bar: 50\nbaz: 35%\nbas: 1250");
38          assertEquals(50.0, foo.bar);
39          assertEquals("0.35", foo.baz.toString());
40          assertEquals("1250", foo.bas);
41      }
42  
43      public void testPrimitive() {
44          Yaml yaml = new Yaml(new BigBeanConstructor());
45          Foo foo = (Foo) yaml.load("bar: 50%\nbaz: 35%\nbas: 1250%\nbaw: 35");
46          assertEquals(0.5, foo.bar);
47          assertEquals("0.35", foo.baz.toString());
48          assertEquals("1250%", foo.bas);
49          assertEquals("35", foo.baw.toString());
50      }
51  
52      class BigBeanConstructor extends Constructor {
53          public BigBeanConstructor() {
54              super(Foo.class);
55              yamlClassConstructors.put(NodeId.scalar, new ConstructBig());
56          }
57  
58          private class ConstructBig extends ConstructScalar {
59              public Object construct(Node node) {
60                  if (node.getType().equals(BigDecimal.class)) {
61                      String val = (String) constructScalar((ScalarNode) node);
62                      if (CUSTOM_PATTERN.matcher(val).matches()) {
63                          return new BigDecimal(val.substring(0, val.length() - 1))
64                                  .divide(new BigDecimal(100));
65                      }
66                  } else if (node.getType().isAssignableFrom(double.class)) {
67                      String val = (String) constructScalar((ScalarNode) node);
68                      if (CUSTOM_PATTERN.matcher(val).matches()) {
69                          return new Double(val.substring(0, val.length() - 1)) / 100;
70                      }
71                  }
72                  return super.construct(node);
73              }
74          }
75      }
76  
77      public static class Foo {
78          public double bar = 0;
79          public BigDecimal baz;
80          public BigDecimal baw;
81          public String bas;
82      }
83  }