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  • XStream

    XStream is a Java library to serialize objects to XML or JSON and back again.

    XStream library

    XStream uses reflection to discover the structure of the object graph to serialize at run time, and doesn't require modifications to objects. It can serialize internal fields, including private and final, and supports non-public and inner classes.

    When serializing an object it serializes the full object graph. Duplicate references encountered in the object-model will be maintained. For example, using the following class CD

    package com.thoughtworks.xstream;
    public class Cd {
    	private String id;
    	private Cd bonusCd;
    	CdString id, Cd bonusCd {
    		this.id = id;
    		this.bonusCd = bonusCd;
    	CdString id {
    		this.id = id;
    	public String getId {
    		return id;
    	public Cd getBonusCd {
    		return bonusCd;

    and add some of these object to a list

    Cd bj = new Cd"basement_jaxx_singles";
    Cd mr = new Cd"maria rita";
    List<Cd> order = new ArrayList<>;
    // adds the same cd twice two references to the same object
    // adds itself cycle
    XStream xstream = new XStream;
    xstream.alias"cd", Cd.class;

    If the above code is executed with XStream's default relative references mode, it will generate the following XML:

        <id>maria rita</id>
      <cd reference="../cd[2]"/>
      <list reference=".."/>

    XStream is free software, distributed under a permissive, revised BSD-style licence.