Examples of com.thoughtworks.xstream.XStream

com.thoughtworks.xstream.XStream

alize to XML Object myObject2 = xstream.fromXML(xml); // deserialize from XML

Aliasing classes

To create shorter XML, you can specify aliases for classes using the alias() method. For example, you can shorten all occurrences of element <com.blah.MyThing> to <my-thing> by registering an alias for the class.

 xstream.alias("my-thing", MyThing.class);

Converters

XStream contains a map of {@link com.thoughtworks.xstream.converters.Converter} instances, each of which acts as astrategy for converting a particular type of class to XML and back again. Out of the box, XStream contains converters for most basic types (String, Date, int, boolean, etc) and collections (Map, List, Set, Properties, etc). For other objects reflection is used to serialize each field recursively.

Extra converters can be registered using the registerConverter() method. Some non-standard converters are supplied in the {@link com.thoughtworks.xstream.converters.extended} package and you can create your own byimplementing the {@link com.thoughtworks.xstream.converters.Converter} interface.

Example

 xstream.registerConverter(new SqlTimestampConverter()); xstream.registerConverter(new DynamicProxyConverter());

The converters can be registered with an explicit priority. By default they are registered with XStream.PRIORITY_NORMAL. Converters of same priority will be used in the reverse sequence they have been registered. The default converter, i.e. the converter which will be used if no other registered converter is suitable, can be registered with priority XStream.PRIORITY_VERY_LOW. XStream uses by default the {@link com.thoughtworks.xstream.converters.reflection.ReflectionConverter} as the fallback converter.

Example

 xstream.registerConverter(new CustomDefaultConverter(), XStream.PRIORITY_VERY_LOW);

Object graphs

XStream has support for object graphs; a deserialized object graph will keep references intact, including circular references.

XStream can signify references in XML using either relative/absolute XPath or IDs. The mode can be changed using setMode():


`xstream.setMode(XStream.XPATH_RELATIVE_REFERENCES);`	(Default) Uses XPath relative references to signify duplicate references. This produces XML with the least clutter.
`xstream.setMode(XStream.XPATH_ABSOLUTE_REFERENCES);`	Uses XPath absolute references to signify duplicate references. This produces XML with the least clutter.
`xstream.setMode(XStream.SINGLE_NODE_XPATH_RELATIVE_REFERENCES);`	Uses XPath relative references to signify duplicate references. The XPath expression ensures that a single node only is selected always.
`xstream.setMode(XStream.SINGLE_NODE_XPATH_ABSOLUTE_REFERENCES);`	Uses XPath absolute references to signify duplicate references. The XPath expression ensures that a single node only is selected always.
`xstream.setMode(XStream.ID_REFERENCES);`	Uses ID references to signify duplicate references. In some scenarios, such as when using hand-written XML, this is easier to work with.
`xstream.setMode(XStream.NO_REFERENCES);`	This disables object graph support and treats the object structure like a tree. Duplicate references are treated as two separate objects and circular references cause an exception. This is slightly faster and uses less memory than the other two modes.

Thread safety

The XStream instance is thread-safe. That is, once the XStream instance has been created and configured, it may be shared across multiple threads allowing objects to be serialized/deserialized concurrently. Note, that this only applies if annotations are not auto-detected on-the-fly.

Implicit collections

To avoid the need for special tags for collections, you can define implicit collections using one of the addImplicitCollection methods.

@author Joe Walnes @author Jörg Schaible @author Mauro Talevi @author Guilherme Silveira

        Assert.assertEquals("anonymous", author1.getName());
    }


    //@Test
    public void addingRendezvousMessages2() throws DbException, XQueryException {
        XStream xstream = new XStream();
        XBirdCollectionStrategy<String, Object> strategy = new XBirdCollectionStrategy<String, Object>(COLLECTION_NAME, xstream);
        xstream.processAnnotations(RendezvousMessage.class);
        xstream.processAnnotations(Author.class);


        List<Author> author1 = Arrays.asList(new Author("anonymous"));
        RendezvousMessage msg1 = new RendezvousMessage(15, author1);
        System.out.println(xstream.toXML(msg1));
        System.out.println();


        List<Author> author2 = Arrays.asList(new Author("makoto"), new Author("leo"), new Author("grun"));
        RendezvousMessage msg2 = new RendezvousMessage(15, author2, "firstPart", "secondPart");
        System.out.println(xstream.toXML(msg2));
        System.out.println();


        List<RendezvousMessage> list = new XmlArrayList(strategy);
        list.add(msg1);
        list.add(msg2);
        Assert.assertEquals(2, list.size());


        String query1 = "fn:collection('/" + COLLECTION_NAME + "/.*.xml')//author";
        XQueryProcessor proc = new XQueryProcessor();
        XQueryModule compiled1 = proc.parse(query1);
        Sequence<? extends Item> items = proc.execute(compiled1);
        INodeSequence<DTMElement> nodes = ProxyNodeSequence.wrap(items, DynamicContext.DUMMY);


        for(DTMElement node : nodes) {
            Object unmarshalled = xstream.unmarshal(new DTMReader(node));
            Author author = (Author) unmarshalled;
            System.out.println("author: " + author.getName());
        }
    }

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    public XBirdCollectionStrategy(String collectionName) {
        this(collectionName, getAnnotationProcessableXStreamInstance());
    }


    public static XStream getAnnotationProcessableXStreamInstance() {
        final XStream xstream;
        if(ClassResolver.isPresent(XPP_CLASS)) {
            xstream = new XStream();
        } else {
            xstream = new XStream(new DomDriver());
        }
        xstream.autodetectAnnotations(true);
        return xstream;
    }

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    }


    // Implementation methods
    // -------------------------------------------------------------------------
    protected XStream createXStream() {
        XStream answer = new XStream();
        answer.alias("invoke", LingoInvocation.class);
        answer.alias("result", RemoteInvocationResult.class);
        return answer;
    }

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        catch(JSONException je){
          throw new IOException(je.getMessage());
        }
      }
      else{
        XStream xstream=XStreamDispenser.getXMLXStream();
        writer.write(xstream.toXML(result));
      }
      return null;
    } catch (BrowseException e) {
      throw new ServletException(e.getMessage(),e);
    }

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        catch(JSONException je){
          throw new IOException(je.getMessage());
        }
      }
      else{
        XStream xstream=XStreamDispenser.getXMLXStream();
        writer.write(xstream.toXML(result));
      }
      
      
      
    } catch (BrowseException e) {

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     * serializing abitary objects to JSON.
     */
    public XStreamJsonAdapter()
    {
        super();
        _xstream = new XStream( new JsonHierarchicalStreamDriver() );
        _strAdapter = new UTF8StringAdapter();
    }

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     * @see com.thoughtworks.xstream.io.xml.CompactWriter
     */
    public XStreamAdapter(boolean isCompact)
    {
        this._isCompact = isCompact;
        this._xstream = new XStream();
    }

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    /**
     * Creates a new instance of XStreamAdapter using the given HierarchicalStreamDriver
     */
    public XStreamAdapter(HierarchicalStreamDriver driver)
    {
        this._xstream = new XStream( driver );
    }

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        // now query both addresses
        System.out.println( "querying Jimmys address..." );
        Address adrJimmy = addressBook.getAddressFromName( "Jimmy Who" );
        System.out.println( "Jimmys address: " );
        XStream xstream = new XStream();
        System.out.println( xstream.toXML( adrJimmy ) );


        System.out.println( "" );


        System.out.println( "querying Janes address..." );
        Address adrJane = addressBook.getAddressFromName( "Jane Who" );
        System.out.println( "Janes address: " );
        System.out.println( xstream.toXML( adrJane ) );
    }

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            request.setArgs( new Object[] { "Jimmy Who" } );
            System.out.println("querying Jimmys address...");
            Address adrJimmy = (Address) client.execute( request );            
            System.out.println("Jimmys address: ");
            XStream xstream = new XStream();
            System.out.println( xstream.toXML( adrJimmy ));
            
            System.out.println("");
            
            request.setArgs( new Object[] { "Jane Who" } );
            System.out.println("querying Janes address...");
            Address adrJane = (Address) client.execute( request );
            System.out.println("Janes address: ");
            System.out.println( xstream.toXML( adrJane ));
        }
        catch ( IOException e )
        {
            e.printStackTrace();
        }

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