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

    // retrieve metadata folder
    _metadataFolder = _tmlFile.getParent().getFolder(new Path("metadata"));
    if (_metadataFolder.exists()) {
      _metadataFile = _metadataFolder.getFile(_tmlFile.getName().substring(0, _tmlFile.getName().length() - _tmlFile.getFileExtension().length()) + "metadata.xml");
      if (_metadataFile.exists()) {
        XStream xstream = new XStream(new DomDriver());
        xstream.alias(TMLMetadataInfo.XSTREAM_ALIAS, TMLMetadataInfo.class);
        Reader reader = null;
        try {
          if(!_metadataFile.isSynchronized(IResource.DEPTH_ZERO)){
            _metadataFile.refreshLocal(IResource.DEPTH_ZERO, new NullProgressMonitor());
          }
          reader = new InputStreamReader(_metadataFile.getContents(), _fileEncoding);
          TMLMetadataInfo metaData = (TMLMetadataInfo) xstream.fromXML(reader);
          directAccess = metaData.isDirectAccess();
          cacheable = metaData.isCacheable();
          description = metaData.getDescription();
          category = metaData.getCategory();
        } catch (CoreException e) {

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      TMLMetadataInfo metaData = new TMLMetadataInfo();
      metaData.setDirectAccess(directAccess);
      metaData.setDescription(description);
      metaData.setCacheable(cacheable);
      metaData.setCategory(category);
      XStream xstream = new XStream(new DomDriver());
      xstream.alias(TMLMetadataInfo.XSTREAM_ALIAS, TMLMetadataInfo.class);
      Writer writer = null;
      try {
        if (!_metadataFolder.exists()) {
          _metadataFolder.create(true, true, new NullProgressMonitor());  
          _metadataFile = _metadataFolder.getFile(_tmlFile.getName().substring(0, _tmlFile.getName().length() - _tmlFile.getFileExtension().length()) + "metadata.xml");
        } 


        writer = new OutputStreamWriter(new FileOutputStream(_metadataFile.getLocation().toFile()), _fileEncoding);
        xstream.toXML(metaData, writer);
        
      } catch (CoreException e) {
        IOException ioe = new IOException("Unable to save metadata file '" + _metadataFile.getLocation() + "'.");
        ioe.setStackTrace(e.getStackTrace());
        throw ioe;

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  public static TMLTagDefinitions fromXML(Reader in) {
    return (TMLTagDefinitions) createXStream().fromXML(in);
  }


  private static XStream createXStream() {
    XStream xstream = new XStream(new DomDriver());
    xstream.setClassLoader(TMLTagDefinitions.class.getClassLoader());
    xstream.setMode(XStream.NO_REFERENCES);
    xstream.alias("tagDefinitions", TMLTagDefinitions.class);
    xstream.alias("tag", TMLTag.class);
    xstream.alias("attribute", TMLTagAttribute.class);
    xstream.alias("attributeGroup", TMLAttributeGroup.class);


    addXStreamAliasFields(xstream, getXStreamAliasFields(), TMLTagDefinitions.class);
    addXStreamAliasFields(xstream, TMLAttributeGroup.getXStreamAliasFields(), TMLAttributeGroup.class);
    addXStreamAliasFields(xstream, TMLTag.getXStreamAliasFields(), TMLTag.class);
    addXStreamAliasFields(xstream, TMLTagAttribute.getXStreamAliasFields(), TMLTagAttribute.class);

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        if (controller != null) {
                ModelAndView modelAndView = controller.handleRequest(request, response);
                if (modelAndView.getModel() != null) {
                    TransportableModel tm = new TransportableModel();
                    tm.putAll(modelAndView.getModel());
                    XStream x = new XStream();
                    x.toXML(tm, response.getWriter());
                }
        }
        return null;
    }

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            long t = System.currentTimeMillis();
            try {
                shiftFiles(0);
                OutputStream os = new FileOutputStream(makeFile());
                try {
                    new XStream().toXML(statsData, os);
                } finally {
                    os.close();
                }
            } catch (Exception e) {
                logger.error("Could not write stats data to " + makeFile().getAbsolutePath(), e);

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        if (f.exists() && f.canRead()) {
            long t = System.currentTimeMillis();
            try {
                FileInputStream fis = new FileInputStream(f);
                try {
                    stats = (Map) (new XStream().fromXML(fis));


                    if (stats != null) {
                        // adjust stats data so that charts look realistic.
                        // we do that by ending the previous stats group with 0 value
                        // and starting the current stats group also with 0

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  public void removeTemplate(DesignTemplate template){
    _templates.remove(template);    
  }
  
  public static  String asXML(DesignTemplateStore ts){
    return new XStream().toXML(ts);
  }

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  public static  String asXML(DesignTemplateStore ts){
    return new XStream().toXML(ts);
  }
  
  public static DesignTemplateStore fromXML(String xml){
    XStream xstream = new XStream(new Dom4JDriver());
    return (DesignTemplateStore)xstream.fromXML(xml);
  }

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        FileUtils.cleanDirectory(colDir);
    }


    @Test
    public void addingAuthors1() {
        XStream xstream = XBirdCollectionStrategy.getAnnotationProcessableXStreamInstance();
        XBirdCollectionStrategy<String, Object> strategy = new XBirdCollectionStrategy<String, Object>(COLLECTION_NAME, xstream);


        //xstream.processAnnotations(Author.class);


        List<Author> list = new XmlArrayList(strategy);

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        list2.clear();
    }


    //@Test
    public void addingRendezvousMessages1() throws DbException, XQueryException {
        XStream xstream = new XStream();
        XBirdCollectionStrategy<String, Object> strategy = new XBirdCollectionStrategy<String, Object>(COLLECTION_NAME, xstream);
        xstream.processAnnotations(RendezvousMessage.class);


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


        RendezvousMessage msg2 = new RendezvousMessage(15, Arrays.asList(new Author("anonymous")), "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 + "/1.xml')//author[1]";
        XQueryProcessor proc = new XQueryProcessor();
        XQueryModule compiled1 = proc.parse(query1);
        StringWriter sw = new StringWriter();
        SAXWriter handler = new SAXWriter(sw);
        SAXSerializer ser = new SAXSerializer(handler);


        proc.execute(compiled1, ser);
        handler.flush();
        String result1 = sw.toString();


        System.err.println(result1);


        Author author1 = (Author) xstream.fromXML(result1);
        Assert.assertEquals("anonymous", author1.getName());
    }

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