Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;

import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;

import javax.xml.namespace.QName;

public class Main {
    private static Map<Class<?>, JAXBContext> contextCache = new HashMap<>();

    /**
     * Marshals a bean to XML.
     * 
     * @param bean
     * @return XML {@link String}
     * @throws JAXBException
     */
    public static <T> String marshal(T bean) throws JAXBException {
        StringWriter stw = new StringWriter();
        createMarshaller(bean.getClass()).marshal(bean, stw);

        return stw.toString();
    }

    /**
     * Marshals a bean to XML.
     * 
     * @param bean
     * @param namespaceURI
     * @param localPart
     * @return XML {@link String}
     * @throws JAXBException
     */
    @SuppressWarnings("unchecked")
    public static <T> String marshal(T bean, String namespaceURI, String localPart) throws JAXBException {
        QName qName = new QName(namespaceURI, localPart);
        Class<T> clazz = (Class<T>) bean.getClass();
        Marshaller marshaller = createMarshaller(clazz);
        Writer stw = new StringWriter();
        marshaller.marshal(new JAXBElement<T>(qName, clazz, bean), stw);

        return stw.toString();
    }

    /**
     * Creates a {@link Marshaller} for the given {@link Class}.
     * 
     * @param clazz {@link Class}
     * @return {@link Marshaller}
     * @throws JAXBException
     */
    private static <T> Marshaller createMarshaller(Class<T> clazz) throws JAXBException {
        return getContext(clazz).createMarshaller();
    }

    /**
     * Returns the corresponding {@link JAXBContext} for the given {@link Class}.
     * 
     * @param clazz {@link Class}
     * @return {@link JAXBContext}
     * @throws JAXBException
     */
    private static <T> JAXBContext getContext(Class<T> clazz) throws JAXBException {
        synchronized (contextCache) {
            if (!contextCache.containsKey(clazz)) {
                contextCache.put(clazz, JAXBContext.newInstance(clazz));
            }
        }

        return contextCache.get(clazz);
    }
}