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    1   /**
    2    * Copyright (c) 2008-2011, 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
    17  package examples;
    18
    19  import java.math.BigDecimal;
    20  import java.util.regex.Pattern;
    21
    22  import junit.framework.TestCase;
    23
    24  import org.yaml.snakeyaml.Yaml;
    25  import org.yaml.snakeyaml.constructor.Constructor;
    26  import org.yaml.snakeyaml.nodes.Node;
    27  import org.yaml.snakeyaml.nodes.NodeId;
    28  import org.yaml.snakeyaml.nodes.ScalarNode;
    29
    30  /**
    31   * http://code.google.com/p/snakeyaml/issues/detail?id=75
    32   */
    33  public class CustomBeanResolverTest extends TestCase {
    34      private final Pattern CUSTOM_PATTERN = Pattern.compile("\\d+%");
    35
    36      public void testOnlyBigDecimal() {
    37          Yaml yaml = new Yaml(new BigBeanConstructor());
    38          Foo foo = (Foo) yaml.load("bar: 50\nbaz: 35%\nbas: 1250");
    39          assertEquals(50.0, foo.bar);
    40          assertEquals("0.35", foo.baz.toString());
    41          assertEquals("1250", foo.bas);
    42      }
    43
    44      public void testPrimitive() {
    45          Yaml yaml = new Yaml(new BigBeanConstructor());
    46          Foo foo = (Foo) yaml.load("bar: 50%\nbaz: 35%\nbas: 1250%\nbaw: 35");
    47          assertEquals(0.5, foo.bar);
    48          assertEquals("0.35", foo.baz.toString());
    49          assertEquals("1250%", foo.bas);
    50          assertEquals("35", foo.baw.toString());
    51      }
    52
    53      class BigBeanConstructor extends Constructor {
    54          public BigBeanConstructor() {
    55              super(Foo.class);
    56              yamlClassConstructors.put(NodeId.scalar, new ConstructBig());
    57          }
    58
    59          private class ConstructBig extends ConstructScalar {
    60              public Object construct(Node node) {
    61                  if (node.getType().equals(BigDecimal.class)) {
    62                      String val = (String) constructScalar((ScalarNode) node);
    63                      if (CUSTOM_PATTERN.matcher(val).matches()) {
    64                          return new BigDecimal(val.substring(0, val.length() - 1))
    65                                  .divide(new BigDecimal(100));
    66                      }
    67                  } else if (node.getType().isAssignableFrom(double.class)) {
    68                      String val = (String) constructScalar((ScalarNode) node);
    69                      if (CUSTOM_PATTERN.matcher(val).matches()) {
    70                          return new Double(val.substring(0, val.length() - 1)) / 100;
    71                      }
    72                  }
    73                  return super.construct(node);
    74              }
    75          }
    76      }
    77
    78      public static class Foo {
    79          public double bar = 0;
    80          public BigDecimal baz;
    81          public BigDecimal baw;
    82          public String bas;
    83      }
    84  }