1 /** 2 * Copyright (c) 2008, 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.Map; 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.AbstractConstruct; 26 import org.yaml.snakeyaml.constructor.SafeConstructor; 27 import org.yaml.snakeyaml.nodes.Node; 28 import org.yaml.snakeyaml.nodes.ScalarNode; 29 import org.yaml.snakeyaml.nodes.Tag; 30 31 /** 32 * Use custom implicit resolver when the runtime class is not defined. 33 * http://code.google.com/p/snakeyaml/issues/detail?id=75 34 */ 35 public class CustomImplicitResolverTest extends TestCase { 36 private final Tag CUSTOM_TAG = new Tag("!BigDecimalDividedBy100"); 37 private final Pattern CUSTOM_PATTERN = Pattern.compile("\\d+%"); 38 39 @SuppressWarnings("unchecked") 40 public void testImplicit() { 41 Yaml yaml = new Yaml(new BigConstructor()); 42 yaml.addImplicitResolver(CUSTOM_TAG, CUSTOM_PATTERN, "-0123456789"); 43 Map<String, Object> obj = (Map<String, Object>) yaml.load("bar: 50%"); 44 assertEquals("0.5", obj.get("bar").toString()); 45 assertEquals(BigDecimal.class, obj.get("bar").getClass()); 46 } 47 48 public void testImplicitFailure() { 49 Yaml yaml = new Yaml(new BigConstructor()); 50 yaml.addImplicitResolver(CUSTOM_TAG, Pattern.compile("\\d+%"), "-0123456789"); 51 try { 52 yaml.load("bar: !!float 50%"); 53 fail("Both implicit and explicit are present."); 54 } catch (NumberFormatException e) { 55 assertEquals("For input string: \"50%\"", e.getMessage()); 56 } 57 } 58 59 class BigConstructor extends SafeConstructor { 60 public BigConstructor() { 61 this.yamlConstructors.put(CUSTOM_TAG, new ConstructBig()); 62 } 63 64 private class ConstructBig extends AbstractConstruct { 65 public Object construct(Node node) { 66 String val = (String) constructScalar((ScalarNode) node); 67 return new BigDecimal(val.substring(0, val.length() - 1)) 68 .divide(new BigDecimal(100)); 69 } 70 } 71 } 72 } 73
