Hi Dmitry,
On Mon, Jan 19, 2009 at 04:21:54PM +0600, shaper_at_sibmail.com wrote:
> Hi all,
>
> 1. We have modified json-from-jaxb sample from the
> jersey-samples-1.0.1-project.zip as shown below (Apache Tomcat servlet
> container is used for deployment):
>
> @Provider
> public final class JAXBContextResolver implements
> ContextResolver<JAXBContext> {
>
> private final JAXBContext context;
>
> private final Set<Class<?>> types;
>
> private final Class<?>[] cTypes = {Flights.class, FlightType.class};
>
> public JAXBContextResolver() throws Exception {
> Map<String, Object> props = new HashMap<String, Object>();
> props.put(JSONJAXBContext.JSON_NOTATION,
> JSONJAXBContext.JSONNotation.MAPPED);
> props.put(JSONJAXBContext.JSON_ROOT_UNWRAPPING, Boolean.TRUE);
> props.put(JSONJAXBContext.JSON_NON_STRINGS, new
> HashSet<String>(1){{add("number");}});
> this.types = new HashSet<Class<?>>(Arrays.asList(cTypes));
> this.context = new JSONJAXBContext(cTypes, props);
> }
>
> public JAXBContext getContext(Class<?> objectType) {
> return (types.contains(objectType)) ? context : null;
> }
>
> }
>
> Output looks as follows (the number field value still as string in spite
> of adding to non-strings):
> {"flight":[{"flightId":"OK123","company":"Czech
> Airlines","number":"123","aircraft":"B737"},
> {"flightId":"OK124","company":"Czech
> Airlines","number":"124","aircraft":"AB115"}]}
>
> Could you clarify cause of the trouble?
Could you please try with the attached web.xml (goes to src/main/webapp/WEB-INF)?
Does it work now? For me it does :-)
The thing probably is, that jaxb context resolver is placed in other
package than the resource classes themselves.
>
>
> 2. Jettison user guide states (http://jettison.codehaus.org/User%27s+Guide):
>
> Available since 1.1
1.1 is still not out, based on [1]. When it gets released, i will update
jersey-json module to use it, and probably review the possible config options.
~Jakub
[1]
http://repo1.maven.org/maven2/org/codehaus/jettison/jettison/
> When writing JSON documents, Jettison tries to convert objects to their
> primitive representation and not to treat everything as a String. For
> example the following snippet:
> StringWriter strWriter = new StringWriter();
> Configuration config = new Configuration();
> MappedNamespaceConvention con = new
> MappedNamespaceConvention(config);
> AbstractXMLStreamWriter w = new MappedXMLStreamWriter(con,
> strWriter);
>
> w.writeStartElement("root");
> w.writeCharacters("true");
> w.writeEndElement();
>
> w.writeEndDocument();
>
> w.close();
> strWriter.close();
>
> System.out.println(strWriter.toString());
> will print
> {"root":true}
> instead of
> {"root":"true"}
>
> This works fine for most use cases, but some users may want to have
> control over this process. Jettison provides customizable type conversion
> mechanism. Beside default type converter used, you can use SimpleConverter
> which will treat everything as a String or write your own. For example,
> StringWriter strWriter = new StringWriter();
> Configuration config = new Configuration();
> config.setTypeConverter(new SimpleConverter());
> MappedNamespaceConvention con = new
> MappedNamespaceConvention(config);
> AbstractXMLStreamWriter w = new MappedXMLStreamWriter(con,
> strWriter);
>
> w.writeStartElement("root");
> w.writeCharacters("true");
> w.writeEndElement();
>
> w.writeEndDocument();
>
> w.close();
> strWriter.close();
>
> System.out.println(strWriter.toString());
> will produce
> {"root":"true"}
>
>
> Seems that Jersey calls props.put(JSONJAXBContext.JSON_NOTATION,
> JSONJAXBContext.JSONNotation.MAPPED_JETTISON); uses
> Jettison.SimpleConverter. But we need to have objects conversion to their
> primitive representation as the default option, i.e. {"root":true}.
>
> Could MAPPED_JETTISON be configured in Jersey to use default converter
> instead of simple converter? If this option is not available, could you
> extend it to use something like this?
>
> props.put(JSONJAXBContext.JSON_NOTATION,
> JSONJAXBContext.JSONNotation.MAPPED_JETTISON.DEFAULT_CONVERTER);
>
>
> Thanks in advance.
>
> Dmitry Sh.
>
>
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- application/xml attachment: web.xml