/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.isis.applib.util;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import java.net.URL;
import java.nio.charset.Charset;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import com.google.common.io.Resources;
/**
* Helper methods for converting {@link javax.xml.bind.annotation.XmlRootElement}-annotated class to-and-from XML. Intended primarily for
* test use only (the {@link JAXBContext} is not cached).
*
* <p>
* For example usage, see <a href="https://github.com/isisaddons/isis-module-publishmq">Isis addons' publishmq module</a> (non-ASF)
* </p>
*/
public class JaxbUtil {
private JaxbUtil(){}
public static <T> T fromXml(
final Reader reader,
final Class<T> dtoClass) {
Unmarshaller un = null;
try {
un = getJaxbContext(dtoClass).createUnmarshaller();
return (T) un.unmarshal(reader);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
public static <T> T fromXml(
final Class<?> contextClass,
final String resourceName,
final Charset charset,
final Class<T> dtoClass) throws IOException {
final URL url = Resources.getResource(contextClass, resourceName);
final String s = Resources.toString(url, charset);
return fromXml(new StringReader(s), dtoClass);
}
public static <T> String toXml(final T dto) {
final CharArrayWriter caw = new CharArrayWriter();
toXml(dto, caw);
return caw.toString();
}
public static <T> void toXml(final T dto, final Writer writer) {
Marshaller m = null;
try {
final Class<?> aClass = dto.getClass();
m = getJaxbContext(aClass).createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
m.marshal(dto, writer);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
private static JAXBContext getJaxbContext(Class<?> dtoClass) {
try {
return JAXBContext.newInstance(dtoClass);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
}