org.springside.modules.utils.encode.JaxbBinder.java Source code

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Here is the source code for org.springside.modules.utils.encode.JaxbBinder.java

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/**
 * Copyright (c) 2005-2010 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id: JaxbBinder.java 1211 2010-09-10 16:20:45Z calvinxiu $
 */
package org.springside.modules.utils.encode;

import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collection;

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;

import org.apache.commons.lang.StringUtils;

/**
 * Jaxb2.0XML<->Java ObjectBinder.
 * 
 * ?RootList.
 * 
 * @author calvin
 */
public class JaxbBinder {
    //Context.
    private JAXBContext jaxbContext;

    /**
     * @param types ??Root.
     */
    public JaxbBinder(Class<?>... types) {
        try {
            jaxbContext = JAXBContext.newInstance(types);
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Java Object->Xml.
     */
    public String toXml(Object root, String encoding) {
        try {
            StringWriter writer = new StringWriter();
            createMarshaller(encoding).marshal(root, writer);
            return writer.toString();
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Java Object->Xml, ?Root ElementCollection.
     */
    @SuppressWarnings("rawtypes")
    public String toXml(Collection root, String rootName, String encoding) {
        try {
            CollectionWrapper wrapper = new CollectionWrapper();
            wrapper.collection = root;

            JAXBElement<CollectionWrapper> wrapperElement = new JAXBElement<CollectionWrapper>(new QName(rootName),
                    CollectionWrapper.class, wrapper);

            StringWriter writer = new StringWriter();
            createMarshaller(encoding).marshal(wrapperElement, writer);

            return writer.toString();
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Xml->Java Object.
     */
    @SuppressWarnings("unchecked")
    public <T> T fromXml(String xml) {
        try {
            StringReader reader = new StringReader(xml);
            return (T) createUnmarshaller().unmarshal(reader);
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Marshaller, encoding(?Null).
     */
    public Marshaller createMarshaller(String encoding) {
        try {
            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 new RuntimeException(e);
        }
    }

    /**
     * UnMarshaller.
     */
    public Unmarshaller createUnmarshaller() {
        try {
            return jaxbContext.createUnmarshaller();
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * ?Root Element  Collection.
     */
    public static class CollectionWrapper {
        @SuppressWarnings("rawtypes")
        @XmlAnyElement
        protected Collection collection;
    }
}