Cool, this one works! I'm not very happy with the JSON representation
{"states":{"names":{"$":"California"}}}
but now will tweak the JAXB to get a more meaningful value.
Thanks,
-Arun
Jakub Podlesak wrote:
> More specifically, your jaxb class should look like:
>
> --cuthere--
> @XmlRootElement(name = "states")
> public class States {
>
> @XmlElement(required=true)
> protected String names;
>
> public String getNames() {
> return names;
> }
>
> public States() {
> this.names = names;
> }
>
> public States(String names) {
> this.names = names;
> }
> }
> --cuthere--
>
>
> Please note the @XmlElement(required=true) annotation.
>
> ~Jakub
>
> On Wed, Sep 05, 2007 at 08:18:04AM +0200, Jakub Podlesak wrote:
>> Hi Arun,
>>
>> please add a default public no-arg constructor to your States jaxb class.
>> It should help.
>>
>> ~Jakub
>>
>> On Tue, Sep 04, 2007 at 11:12:09PM -0700, Arun Gupta wrote:
>>> I tried invoking the endpoint using ant's get task and got the following
>>> error:
>>>
>>> -- cut here --
>>> get:
>>> [get] Getting: http://localhost:9998/helloworld/json2
>>> [get] To: C:\workarea\samples\jersey\json\out
>>> [get] Error getting http://localhost:9998/helloworld/json2 to
>>> C:\workarea\
>>> samples\jersey\json\out
>>>
>>> BUILD FAILED
>>> C:\workarea\samples\jersey\json\build.xml:32: java.io.IOException:
>>> Premature EOF
>>>
>>> -- cut here --
>>>
>>> No error message is thrown on the server-side. Any further suggestions
>>> on debugging it ?
>>>
>>> -Arun
>>>
>>>
>>> Jakub Podlesak wrote:
>>>> Hi Arun,
>>>>
>>>> I have changed the produced content type to [application/xml]
>>>> for your [samples.HelloWorldResource#getStates] method
>>>> and it does not produce valid xml.
>>>>
>>>> I get following error message from firefox:
>>>> --cuthere--
>>>> XML Parsing Error: no element found
>>>> Location: http://localhost:9998/helloworld/json2
>>>> Line Number 1, Column 1:
>>>> --cuthere--
>>>>
>>>> My recommendation is to test your jaxb class first.
>>>>
>>>> I will look at it and let you know,
>>>>
>>>> ~Jakub
>>>>
>>>> On Tue, Sep 04, 2007 at 10:30:46PM -0700, Arun Gupta wrote:
>>>>> I've attached a zip file that contains a really simple to demonstrate
>>>>> usage of JAXB. Steps to follow:
>>>>>
>>>>> 1). Set jersey.home in build.xml appropriately
>>>>> 2). Invoke "ant run"
>>>>> 3). Access "http://localhost:9998/helloworld/json2" in browser
>>>>>
>>>>> The returned JSON is empty.
>>>>>
>>>>> What am I missing ?
>>>>>
>>>>> -Arun
>>>>>
>>>>> 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
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ---------------------------------------------------------------------
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>> Marc Hadley <marc.hadley at sun.com>
>>>>>>>>>>>>>> CTO Office, Sun Microsystems.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---------------------------------------------------------------------
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>>>>>>
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>>>>>>>>>>>>>
>>>>>>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>>>> --
>>>>>>>>>>>> Web Technologies and Standards
>>>>>>>>>>>> Sun Microsystems, Inc.
>>>>>>>>>>>> Blog: http://blogs.sun.com/arungupta
>>>>>>>>>>>>
>>>>>>>>>>>> ---------------------------------------------------------------------
>>>>>>>>>>>>
>>>>>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>>>>
>>>>>>>>>>> ---
>>>>>>>>>>> Marc Hadley <marc.hadley at sun.com>
>>>>>>>>>>> CTO Office, Sun Microsystems.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> ---------------------------------------------------------------------
>>>>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> 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
>>>>>>>>>>
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>>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>>>
>>>>>>>> --
>>>>>>>> Web Technologies and Standards
>>>>>>>> Sun Microsystems, Inc.
>>>>>>>> Blog: http://blogs.sun.com/arungupta
>>>>>>>> ---------------------------------------------------------------------
>>>>>>>> To unsubscribe, e-mail: users-unsubscribe_at_jersey.dev.java.net
>>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
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>>>>>>> For additional commands, e-mail: users-help_at_jersey.dev.java.net
>>>>>>>
>>>>> --
>>>>> Web Technologies and Standards
>>>>> Sun Microsystems, Inc.
>>>>> Blog: http://blogs.sun.com/arungupta
>>>>
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>>>>
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>>> Sun Microsystems, Inc.
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>>>
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>
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