com.sc.utils.mapper.JaxbMapper Maven / Gradle / Ivy
package com.sc.utils.mapper;
import com.sc.utils.utils.Exceptions;
import com.sc.utils.utils.Reflections;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collection;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.namespace.QName;
public class JaxbMapper {
private static ConcurrentMap jaxbContexts = new ConcurrentHashMap();
public static String toXml(Object root) {
Class clazz = Reflections.getUserClass(root);
return toXml(root, clazz, null);
}
public static String toXml(Object root, String encoding) {
Class clazz = Reflections.getUserClass(root);
return toXml(root, clazz, encoding);
}
public static String toXml(Object root, Class clazz, String encoding) {
try {
StringWriter writer = new StringWriter();
createMarshaller(clazz, encoding).marshal(root, writer);
return writer.toString();
} catch (JAXBException e) {
throw Exceptions.unchecked(e);
}
}
public static String toXml(Collection root, String rootName, Class clazz) {
return toXml(root, rootName, clazz, null);
}
public static String toXml(Collection root, String rootName, Class clazz, String encoding) {
try {
CollectionWrapper wrapper = new CollectionWrapper();
wrapper.collection = root;
JAXBElement wrapperElement = new JAXBElement(new QName(rootName),
CollectionWrapper.class, wrapper);
StringWriter writer = new StringWriter();
createMarshaller(clazz, encoding).marshal(wrapperElement, writer);
return writer.toString();
} catch (JAXBException e) {
throw Exceptions.unchecked(e);
}
}
public static T fromXml(String xml, Class clazz) {
try {
StringReader reader = new StringReader(xml);
return (T) createUnmarshaller(clazz).unmarshal(reader);
} catch (JAXBException e) {
throw Exceptions.unchecked(e);
}
}
public static Marshaller createMarshaller(Class clazz, String encoding) {
try {
JAXBContext jaxbContext = getJaxbContext(clazz);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
if (StringUtils.isNotBlank(encoding)) {
marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);
}
return marshaller;
} catch (JAXBException e) {
throw Exceptions.unchecked(e);
}
}
public static Unmarshaller createUnmarshaller(Class clazz) {
try {
JAXBContext jaxbContext = getJaxbContext(clazz);
return jaxbContext.createUnmarshaller();
} catch (JAXBException e) {
throw Exceptions.unchecked(e);
}
}
protected static JAXBContext getJaxbContext(Class clazz) {
Validate.notNull(clazz, "'clazz' must not be null");
JAXBContext jaxbContext = jaxbContexts.get(clazz);
if (jaxbContext == null) {
try {
jaxbContext = JAXBContext.newInstance(clazz, CollectionWrapper.class);
jaxbContexts.putIfAbsent(clazz, jaxbContext);
} catch (JAXBException ex) {
throw new RuntimeException("Could not instantiate JAXBContext for class [" + clazz + "]: "
+ ex.getMessage(), ex);
}
}
return jaxbContext;
}
public static class CollectionWrapper {
@XmlAnyElement
protected Collection collection;
}
}