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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013-2014 sagyf Yang. The Four Group.
 */
package goja.core.kits;

import com.google.common.base.Throwables;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import java.io.File;
import java.io.StringReader;
import java.io.StringWriter;

/**
 * Xml object互转. 

 */
public class JaxbKit {

    /**
     * string -> object
     */
    @SuppressWarnings("unchecked")
    public static  T unmarshal(String src, Class clazz) {
        T result = null;
        try {
            Unmarshaller avm = JAXBContext.newInstance(clazz).createUnmarshaller();
            result = (T) avm.unmarshal(new StringReader(src));
        } catch (JAXBException e) {
            Throwables.propagate(e);
        }
        return result;
    }

    @SuppressWarnings("unchecked")
    public static  T unmarshal(File xmlFile, Class clazz) {
        T result = null;
        try {
            Unmarshaller avm = JAXBContext.newInstance(clazz).createUnmarshaller();
            result = (T) avm.unmarshal(xmlFile);
        } catch (JAXBException e) {
            Throwables.propagate(e);
        }
        return result;
    }

    /**
     * object -> string
     *
     * @param jaxbElement jaxb element
     * @return string value.
     */
    public static String marshal(Object jaxbElement) {
        StringWriter sw;
        try {
            Marshaller fm = JAXBContext.newInstance(jaxbElement.getClass()).createMarshaller();
            fm.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            sw = new StringWriter();
            fm.marshal(jaxbElement, sw);
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
        return sw.toString();
    }
}