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/**
* Copyright (c) 2008, SnakeYAML
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package examples;
import java.math.BigDecimal;
import java.util.Map;
import java.util.regex.Pattern;
import junit.framework.TestCase;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.AbstractConstruct;
import org.yaml.snakeyaml.constructor.SafeConstructor;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.ScalarNode;
import org.yaml.snakeyaml.nodes.Tag;
/**
* Use custom implicit resolver when the runtime class is not defined.
* http://code.google.com/p/snakeyaml/issues/detail?id=75
*/
public class CustomImplicitResolverTest extends TestCase {
private final Tag CUSTOM_TAG = new Tag("!BigDecimalDividedBy100");
private final Pattern CUSTOM_PATTERN = Pattern.compile("\\d+%");
@SuppressWarnings("unchecked")
public void testImplicit() {
Yaml yaml = new Yaml(new BigConstructor());
yaml.addImplicitResolver(CUSTOM_TAG, CUSTOM_PATTERN, "-0123456789");
Map<String, Object> obj = yaml.load("bar: 50%");
assertEquals("0.5", obj.get("bar").toString());
assertEquals(BigDecimal.class, obj.get("bar").getClass());
}
public void testImplicitFailure() {
Yaml yaml = new Yaml(new BigConstructor());
yaml.addImplicitResolver(CUSTOM_TAG, Pattern.compile("\\d+%"), "-0123456789");
try {
yaml.load("bar: !!float 50%");
fail("Both implicit and explicit are present.");
} catch (NumberFormatException e) {
assertEquals("For input string: \"50%\"", e.getMessage());
}
}
class BigConstructor extends SafeConstructor {
public BigConstructor() {
this.yamlConstructors.put(CUSTOM_TAG, new ConstructBig());
}
private class ConstructBig extends AbstractConstruct {
public Object construct(Node node) {
String val = constructScalar((ScalarNode) node);
return new BigDecimal(val.substring(0, val.length() - 1)).divide(new BigDecimal(100));
}
}
}
}
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