users@jersey.java.net

Re: application/json programming model

From: Jakub Podlesak <Jakub.Podlesak_at_Sun.COM>
Date: Wed, 05 Sep 2007 07:30:52 +0200

Hi Arun,

I have added the example to the Jersey repository. It should be also
part of recently issued stable version snapshot 0.2.1 available at:
https://jersey.dev.java.net/servlets/ProjectDocumentList?folderID=7654&expandFolder=7654&folderID=0

You might want to try it from there.

Thanks,

~Jakub

P.S. Your issue can be IMHO also resolved by using jdk6 instead of jdk5.
You are using jdk5 now, right?


On Tue, Sep 04, 2007 at 09:52:48PM -0700, Arun Gupta wrote:
> After removing the private directory, I'm getting the following error
> during build time:
>
> -- cut here --
> Created dir: C:\workarea\samples\JsonFromJaxb\build\web\WEB-INF\classes
> Processing resource classes
> Problem encountered during annotation processing;
> see stacktrace below for more information.
> java.lang.ClassFormatError: Illegal class modifiers in class
> com/sun/ws/rest/tools/webapp/writer/package-info: 0x1600
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:465)
> at
> com.sun.istack.tools.ParallelWorldClassLoader.findClass(ParallelWorldClassLoader.java:90)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:242)
> at java.lang.Package.getPackageInfo(Package.java:350)
> at java.lang.Package.getAnnotation(Package.java:361)
> at com.sun.xml.txw2.TXW.getTagName(TXW.java:60)
> at com.sun.xml.txw2.TXW.create(TXW.java:83)
> at
> com.sun.ws.rest.tools.webapp.writer.WebAppWriter.writeTo(WebAppWriter.java:58)
> at
> com.sun.ws.rest.tools.webapp.writer.WebAppWriter.write(WebAppWriter.java:66)
> at
> com.sun.ws.rest.tools.annotation.apt.UriTemplateProcessor.process(UriTemplateProcessor.java:214)
> at
> com.sun.mirror.apt.AnnotationProcessors$CompositeAnnotationProcessor.process(AnnotationProcessors.java:60)
> at com.sun.tools.apt.comp.Apt.main(Apt.java:454)
> at
> com.sun.tools.apt.main.JavaCompiler.compile(JavaCompiler.java:448)
> at com.sun.tools.apt.main.Main.compile(Main.java:1075)
> at com.sun.tools.apt.main.Main.compile(Main.java:938)
> at com.sun.tools.apt.Main.processing(Main.java:95)
> at com.sun.tools.apt.Main.process(Main.java:85)
> at com.sun.tools.apt.Main.process(Main.java:67)
> at com.sun.ws.rest.tools.RsGenTool.run(RsGenTool.java:36)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at com.sun.ws.rest.tools.Invoker.invoke(Invoker.java:104)
> at com.sun.ws.rest.tools.RsGen.main(RsGen.java:31)
> -- cut here --
>
> and
>
> -- cut here --
> Initializing Sun's JavaServer Faces implementation (1.2_04-b20-p03) for
> context ''
> "DPL8015: Invalid Deployment Descriptors in Deployment descriptor file
> WEB-INF/web.xml in archive [web].
> Line -1 Column -1 -- Premature end of file."
> "DPL8005: Deployment Descriptor parsing failure : Premature end of file."
> Exception occured in J2EEC Phaseorg.xml.sax.SAXParseException: Premature
> end of file.
> com.sun.enterprise.deployment.backend.IASDeploymentException: Error
> loading deployment descriptors for module [JsonFromJaxb] Line -1 Column
> -1 -- Deployment descriptor file WEB-INF/web.xml in archive [web].
> Premature end of file.
> at
> com.sun.enterprise.deployment.backend.Deployer.loadDescriptors(Deployer.java:380)
> at
> com.sun.enterprise.deployment.backend.ModuleDeployer.loadDescriptors(ModuleDeployer.java:423)
> at
> com.sun.enterprise.deployment.backend.WebModuleDeployer.deploy(WebModuleDeployer.java:157)
>
> -- cut here --
>
> during runtime.
>
> Any idea what might be wrong ?
>
> -Arun
> Jakub Podlesak wrote:
> >Hi Arun,
> >
> >The NetBeans project should use jar files from it's [lib] subdirectory. I
> >have rewritten the dependencies. (If you look at the snapshot you will
> >realize
> >I run it from outside of Jersey dir structure)
> >
> >But you right, I forgot to remove [nbproject/private] directory, which
> >keeps info about the files within my filesystem. It can probably cause
> >issues.
> >
> >Could you please remove the [private] dir and try again?
> >I will fix the issue and update the project on the web.
> >
> >Thanks,
> >
> >~Jakub
> >
> >On Fri, Aug 31, 2007 at 11:56:52AM -0700, Arun Gupta wrote:
> >>Thanks Jakub.
> >>
> >>The NetBeans project seems to be using Jersey directory structure for
> >>resolving libraries and that gives the error attached in the image. I
> >>resolved the references but building the project gives the following
> >>error:
> >>
> >>C:\workarea\samples\JsonFromJaxb\JsonFromJaxb\build.xml:22: taskdef
> >>class com.sun.ws.rest.tools.ant.WebResourcesProcessorTask cannot be found
> >>
> >>-Arun
> >>
> >>Jakub Podlesak wrote:
> >>>Hi Arun,
> >>>
> >>>please look at the sample linked from:
> >>>http://blogs.sun.com/japod/entry/json_representation_of_jaxb_object
> >>>
> >>>~Jakub
> >>>
> >>>On Fri, Aug 31, 2007 at 08:13:36AM -0700, Arun Gupta wrote:
> >>>>>What you need to do is to create a JAXB bean with @XmlRootElement on
> >>>>>the class. Write a JAX-RS bean with a method that returns the JAXB
> >>>>>bean and is annotated with @ProduceMime("application/json") something
> >>>>>like:
> >>>>>
> >>>>>@XmlRootElement
> >>>>>public class States {
> >>>>>...
> >>>>>}
> >>>>>
> >>>>>@UriTemplate("states")
> >>>>>public class StatesResource {
> >>>>>
> >>>>>@HttpMethod
> >>>>>@ProduceMime("application/json")
> >>>>>States getStates() {
> >>>>> ...
> >>>>>}
> >>>>>}
> >>>>>
> >>>>>The JAXB provider will automagically convert the returned States class
> >>>>>instance into JSON for you.
> >>>>This is reasonable. I tried it exactly this way without looking at the
> >>>>sample and got an empty response.
> >>>>
> >>>>>I'm sure Jakub's example will show this in
> >>>>>more detail.
> >>>>This sample is not configured to run by default:
> >>>>
> >>>>-- cut here --
> >>>>init:
> >>>>deps-jar:
> >>>>Processing resource classes
> >>>>compile:
> >>>>run:
> >>>>Exception in thread "main" java.lang.IllegalArgumentException
> >>>> at com.sun.ws.rest.samples.storageservice.Main.main(Main.java:85)
> >>>>Java Result: 1
> >>>>BUILD SUCCESSFUL (total time: 4 seconds)
> >>>>-- cut here --
> >>>>
> >>>>A default command-line argument is missing.
> >>>>
> >>>>-Arun
> >>>>>Marc.
> >>>>>
> >>>>>>>>use. You might not be able to get the exact JSON format you show
> >>>>>>>>below but I'd bet you could get close just using some of the JAXB
> >>>>>>>>annotations.
> >>>>>>>>
> >>>>>>>>Marc.
> >>>>>>>>
> >>>>>>>>On Aug 30, 2007, at 2:33 PM, Arun Gupta wrote:
> >>>>>>>>
> >>>>>>>>>In order to return a JSON array like:
> >>>>>>>>>
> >>>>>>>>>[{"name":"California","value":"California"},{"name":"New
> >>>>>>>>>York","value":"New York"},{"name":"Alabama" ,"value":"Alabama"},
> >>>>>>>>>{"name":"Texas","value":"Texas"}]
> >>>>>>>>>
> >>>>>>>>>I have to write the following code:
> >>>>>>>>>
> >>>>>>>>>-- cut here --
> >>>>>>>>> @HttpMethod("GET")
> >>>>>>>>> @ProduceMime("application/json")
> >>>>>>>>> public JSONArray getMessage() throws JSONException {
> >>>>>>>>> String[] states = { "California", "New York", "Alabama",
> >>>>>>>>>"Texas"};
> >>>>>>>>> JSONArray array = new JSONArray();
> >>>>>>>>> for (String s : states) {
> >>>>>>>>> JSONObject item = new JSONObject();
> >>>>>>>>> item.put("name", s).put("value", s);
> >>>>>>>>> array.put(item);
> >>>>>>>>> }
> >>>>>>>>>
> >>>>>>>>> return array;
> >>>>>>>>> }
> >>>>>>>>>-- cut here --
> >>>>>>>>>
> >>>>>>>>>I think this is too involving and low-level. Can the code be
> >>>>>>>>>something like the following ?
> >>>>>>>>>
> >>>>>>>>>-- cut here --
> >>>>>>>>>@JSONObject
> >>>>>>>>>ItemBean {
> >>>>>>>>>ItemBean(String name, String value) { ... }
> >>>>>>>>>
> >>>>>>>>>@JSONObjectKey
> >>>>>>>>>public String getName() { ... }
> >>>>>>>>>
> >>>>>>>>>@JSONObjectValue("value")
> >>>>>>>>>public String getNameValue() { ... }
> >>>>>>>>>}
> >>>>>>>>>
> >>>>>>>>> @HttpMethod("GET")
> >>>>>>>>> @ProduceMime("application/json")
> >>>>>>>>> public List<ItemBean> getMessage() {
> >>>>>>>>> String[] states = { "California", "New York", "Alabama",
> >>>>>>>>>"Texas"};
> >>>>>>>>> List<ItemBean> list = new ArrayList<ItemBean>();
> >>>>>>>>> for (String s : states) {
> >>>>>>>>> ItemBean bean = new ItemBean(s, s);
> >>>>>>>>> list.add(bean);
> >>>>>>>>> }
> >>>>>>>>>
> >>>>>>>>> return list;
> >>>>>>>>> }
> >>>>>>>>>-- cut here --
> >>>>>>>>>
> >>>>>>>>>This will require defining new annotations JSONObject,
> >>>>>>>>>JSONObjectKey & JSONObjectValue. I think this is more natural to a
> >>>>>>>>>Java developer.
> >>>>>>>>>
> >>>>>>>>>-Arun
> >>>>>>>>>--
> >>>>>>>>>Web Technologies and Standards
> >>>>>>>>>Sun Microsystems, Inc.
> >>>>>>>>>Blog: http://blogs.sun.com/arungupta
> >>>>>>>>>
> >>>>>>>>>---------------------------------------------------------------------
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> >>>>>>>>>For additional commands, e-mail: users-help_at_jersey.dev.java.net
> >>>>>>>>>
> >>>>>>>>---
> >>>>>>>>Marc Hadley <marc.hadley at sun.com>
> >>>>>>>>CTO Office, Sun Microsystems.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>---------------------------------------------------------------------
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> >>>>>>--
> >>>>>>Web Technologies and Standards
> >>>>>>Sun Microsystems, Inc.
> >>>>>>Blog: http://blogs.sun.com/arungupta
> >>>>>>
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> >>>>>>
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> >>>>>CTO Office, Sun Microsystems.
> >>>>>
> >>>>>
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> >>>>>
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> >>>>Sun Microsystems, Inc.
> >>>>Blog: http://blogs.sun.com/arungupta
> >>>>
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> >>>
> >>--
> >>Web Technologies and Standards
> >>Sun Microsystems, Inc.
> >>Blog: http://blogs.sun.com/arungupta
> >
> >
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>
> --
> Web Technologies and Standards
> Sun Microsystems, Inc.
> Blog: http://blogs.sun.com/arungupta
>
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