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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.jodatime;
import java.util.Date;
import java.util.List;
import junit.framework.TestCase;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.DumperOptions.FlowStyle;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Construct;
import org.yaml.snakeyaml.constructor.Constructor;
import org.yaml.snakeyaml.events.Event;
import org.yaml.snakeyaml.events.ScalarEvent;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.NodeId;
import org.yaml.snakeyaml.nodes.Tag;
public class JodaTimeFlowStylesTest extends TestCase {
private static final long timestamp = 1000000000000L;
/**
* @see <a href="http://code.google.com/p/snakeyaml/issues/detail?id=128">issue 128</a>
*/
public void testLoadBeanWithBlockFlow() {
MyBean bean = new MyBean();
bean.setId("id123");
DateTime etalon = new DateTime(timestamp, DateTimeZone.UTC);
bean.setDate(etalon);
DumperOptions options = new DumperOptions();
options.setDefaultFlowStyle(FlowStyle.BLOCK);
Yaml dumper = new Yaml(new JodaTimeRepresenter(), options);
// compare Nodes with flow style AUTO and flow style BLOCK
Node node1 = dumper.represent(bean);
DumperOptions options2 = new DumperOptions();
options2.setDefaultFlowStyle(FlowStyle.AUTO);
Yaml dumper2 = new Yaml(new JodaTimeRepresenter(), options2);
Node node2 = dumper2.represent(bean);
assertEquals(node2.toString(), node1.toString());
// compare Events with flow style AUTO and flow style BLOCK
List<Event> events1 = dumper.serialize(node1);
List<Event> events2 = dumper2.serialize(node2);
assertEquals(events2.size(), events1.size());
int i = 0;
for (Event etalonEvent : events2) {
assertEquals(etalonEvent, events1.get(i++));
if (etalonEvent instanceof ScalarEvent) {
ScalarEvent scalar = (ScalarEvent) etalonEvent;
if (scalar.getValue().equals("2001-09-09T01:46:40Z")) {
assertTrue(scalar.getImplicit().canOmitTagInPlainScalar());
assertFalse(scalar.getImplicit().canOmitTagInNonPlainScalar());
}
}
}
// Nodes and Events are the same. Only emitter may influence the output.
String doc1 = dumper.dump(bean);
// System.out.println(doc1);
/*
* 'date' must be used only with the explicit '!!timestamp' tag. Implicit tag will not work
* because 'date' is the JavaBean property and in this case the empty constructor of the class
* will be used. Since this constructor does not exist for JodaTime an exception will be thrown.
*/
assertEquals("!!examples.jodatime.MyBean\ndate: 2001-09-09T01:46:40Z\nid: id123\n", doc1);
/*
* provided JodaTimeContructor will be ignored because 'date' is a JavaBean property and its
* class gets more priority then the implicit '!!timestamp' tag.
*/
Yaml loader = new Yaml(new JodaTimeImplicitContructor());
try {
loader.load(doc1);
} catch (Exception e) {
assertTrue("The error must indicate that JodaTime cannot be created from the scalar value.",
e.getMessage().contains(
"No String constructor found. Exception=org.joda.time.DateTime.<init>(java.lang.String)"));
}
// we have to provide a special way to create JodaTime instances from
// scalars
Yaml loader2 = new Yaml(new JodaPropertyConstructor());
MyBean parsed = loader2.load(doc1);
assertEquals(etalon, parsed.getDate());
}
/**
* !!timestamp must be used, without it the implicit tag will be ignored because 'date' is the
* JavaBean property.
*
* Since the timestamp contains ':' character it cannot use plain scalar style in the FLOW mapping
* style. Emitter suggests single quoted scalar style and that is why the explicit '!!timestamp'
* is present in the YAML document.
*
* @see <a href="http://code.google.com/p/snakeyaml/issues/detail?id=128">issue 128</a>
*
*/
public void testLoadBeanWithAutoFlow() {
MyBean bean = new MyBean();
bean.setId("id123");
DateTime etalon = new DateTime(timestamp, DateTimeZone.UTC);
bean.setDate(etalon);
DumperOptions options = new DumperOptions();
options.setDefaultFlowStyle(FlowStyle.AUTO);
Yaml dumper = new Yaml(new JodaTimeRepresenter(), options);
String doc = dumper.dump(bean);
// System.out.println(doc);
assertEquals(
"!!examples.jodatime.MyBean {date: !!timestamp '2001-09-09T01:46:40Z', id: id123}\n", doc);
Yaml loader = new Yaml(new JodaTimeImplicitContructor());
MyBean parsed = loader.load(doc);
assertEquals(etalon, parsed.getDate());
}
private class JodaPropertyConstructor extends Constructor {
public JodaPropertyConstructor() {
yamlClassConstructors.put(NodeId.scalar, new TimeStampConstruct());
}
class TimeStampConstruct extends Constructor.ConstructScalar {
@Override
public Object construct(Node nnode) {
if (nnode.getTag().equals(new Tag("tag:yaml.org,2002:timestamp"))) {
Construct dateConstructor = yamlConstructors.get(Tag.TIMESTAMP);
Date date = (Date) dateConstructor.construct(nnode);
return new DateTime(date, DateTimeZone.UTC);
} else {
return super.construct(nnode);
}
}
}
}
}
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