JaxbUnmarshallerGeneric.java

package com.proalpha.pds.paconnector.utils;
 
import java.io.File;
import java.util.Locale;
 
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
 
public class JaxbUnmarshallerGeneric<T> {
 
    private final Class<T> clazz;
 
    public JaxbUnmarshallerGeneric(final Class<T> clazz) {
        this.clazz = clazz;
 
    }
 
    @SuppressWarnings("unchecked")
    public T readXMLFile(File xmlFile) {
 
        Locale defaultLocale = Locale.getDefault();
        try {
            final JAXBContext context = JAXBContext.newInstance(clazz);
            Unmarshaller unmarshaller = context.createUnmarshaller();
            return (T) unmarshaller.unmarshal(xmlFile);
 
        } catch (JAXBException e) {
            // Jaxb only returns useful error messages if the locale is set to ENGLISH
            Locale.setDefault(Locale.ENGLISH);
            throw new IllegalStateException(e);
        } finally {
            // Set locale to default afterwards
            Locale.setDefault(defaultLocale);
        }
 
    }
}