1 /** 2 * Copyright (c) 2008, SnakeYAML 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 package examples; 15 16 import java.math.BigDecimal; 17 import java.util.Map; 18 import java.util.regex.Pattern; 19 import junit.framework.TestCase; 20 import org.yaml.snakeyaml.Yaml; 21 import org.yaml.snakeyaml.constructor.AbstractConstruct; 22 import org.yaml.snakeyaml.constructor.SafeConstructor; 23 import org.yaml.snakeyaml.nodes.Node; 24 import org.yaml.snakeyaml.nodes.ScalarNode; 25 import org.yaml.snakeyaml.nodes.Tag; 26 27 /** 28 * Use custom implicit resolver when the runtime class is not defined. 29 * http://code.google.com/p/snakeyaml/issues/detail?id=75 30 */ 31 public class CustomImplicitResolverTest extends TestCase { 32 33 private final Tag CUSTOM_TAG = new Tag("!BigDecimalDividedBy100"); 34 private final Pattern CUSTOM_PATTERN = Pattern.compile("\\d+%"); 35 36 @SuppressWarnings("unchecked") testImplicit()37 public void testImplicit() { 38 Yaml yaml = new Yaml(new BigConstructor()); 39 yaml.addImplicitResolver(CUSTOM_TAG, CUSTOM_PATTERN, "-0123456789"); 40 Map<String, Object> obj = yaml.load("bar: 50%"); 41 assertEquals("0.5", obj.get("bar").toString()); 42 assertEquals(BigDecimal.class, obj.get("bar").getClass()); 43 } 44 testImplicitFailure()45 public void testImplicitFailure() { 46 Yaml yaml = new Yaml(new BigConstructor()); 47 yaml.addImplicitResolver(CUSTOM_TAG, Pattern.compile("\\d+%"), "-0123456789"); 48 try { 49 yaml.load("bar: !!float 50%"); 50 fail("Both implicit and explicit are present."); 51 } catch (NumberFormatException e) { 52 assertEquals("For input string: \"50%\"", e.getMessage()); 53 } 54 } 55 56 class BigConstructor extends SafeConstructor { 57 BigConstructor()58 public BigConstructor() { 59 this.yamlConstructors.put(CUSTOM_TAG, new ConstructBig()); 60 } 61 62 private class ConstructBig extends AbstractConstruct { 63 construct(Node node)64 public Object construct(Node node) { 65 String val = constructScalar((ScalarNode) node); 66 return new BigDecimal(val.substring(0, val.length() - 1)).divide(new BigDecimal(100)); 67 } 68 } 69 } 70 } 71