Oh sure !
I didn't notice this problem. Now, I use the subclass with Jaxb by
allowing Jaxb to match subclass with Project.class.
Thanks a lot Wolfang.
Wolfgang Laun a écrit :
>
>
> <quote>
>
>
> java.lang
> Class InstantiationException
>
> public class *InstantiationException*
> extends Exception <file:////usr/local/java/jdk1.6.0_03/docs/api/java/lang/Exception.html>
>
>
>
> Thrown when an application tries to create an instance of a class
> using the |newInstance| method in class |Class|, but the specified
> class object cannot be instantiated. The instantiation can fail for a
> variety of reasons including but not limited to:
>
> * the class object represents an abstract class,...
>
> </quote>
>
> Get rid of abstract in main.java.***.Project.
> -W
>
>
> 2009/9/8 Raphaël Flores <rflores_at_moulon.inra.fr
> <mailto:rflores_at_moulon.inra.fr>>
>
> Hello all, when I execute my app, I get an exception thrown at
> unmarshalling step.
>
> I don't understand why, and did not find solution via google.
> That's why I post here.
>
> Here is the exception:
> ---------------------------------------------------------------------
> Exception in thread "main" javax.xml.bind.UnmarshalException:
> Unable to create an instance of main.java.***.Project
> - with linked exception:
> [java.lang.InstantiationException]
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader.reportError(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.StructureLoader.startElement(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.startElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unknown
> Source)
> at
> com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(Unknown
> Source)
> at
> javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown
> Source)
> at
> javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown
> Source)
> at main.java.***.Client.unmarshalNonGeneric(Client.java:401)
> at main.java.***.Client.doSomething(Client.java:349)
> at main.java.***.Client.main(Client.java:66)
> Caused by: java.lang.InstantiationException
> at
> sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
> at
> java.lang.reflect.Constructor.newInstance(Constructor.java:532)
> at
> com.sun.xml.internal.bind.v2.ClassFactory.create0(Unknown Source)
> at
> com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.createInstance(Unknown
> Source)
> ... 25 more
> ---------------------------------------------------------------------
>
>
> Here is my test code:
> =================================================
> import java.io.IOException;
> import java.io.InputStream;
> import java.net.ConnectException;
>
> import javax.xml.bind.JAXBContext;
> import javax.xml.bind.JAXBException;
> import javax.xml.bind.Unmarshaller;
>
> import main.java.***.Project;
>
> import org.apache.commons.httpclient.HttpClient;
> import org.apache.commons.httpclient.HttpException;
> import org.apache.commons.httpclient.methods.GetMethod;
> import org.apache.cxf.common.util.Base64Utility;
>
> public class Client {
>
> public static void main(String[] args) throws Exception {
>
> String url = "http://localhost:8080/projects/127"
> <http://localhost:8080/projects/127>;
> String login = "toto";
> String password = "tata";
>
> doSomething(url, login, password);
> }
>
> public static void doSomething(String url, String login,
> String password ) throws InterruptedException, HttpException,
> IOException, JAXBException{
> GetMethod get = new GetMethod(url);
> get.addRequestHeader("Accept", "application/xml");
> get.addRequestHeader("ContentType", "application/xml");
>
> get.addRequestHeader("Authorization",
> getHeaderAuthorization(login, password));
>
> HttpClient httpclient = new HttpClient();
> try {
> int result = httpclient.executeMethod(get);
>
> System.out.println("\nResponse status code:\n" + result);
> InputStream stream = get.getResponseBodyAsStream();
>
> Project project = (Project)unmarshal(Project.class,
> stream);
> System.out.println("Project is:" + project.toString());
> }
> catch (ConnectException e) {
> System.out.println("\nConnection to service refused !\n"
> + "Please, check that server is running and
> URL and port are right.");
> }
> finally {
> get.releaseConnection();
> }
> }
>
> public String getHeaderAuthorization(String login, String
> password) {
> String loginPassword = login + ":" + password;
> String encodedLoginPassword =
> Base64Utility.encode(loginPassword.getBytes());
> String encodedHeader = "Basic " + encodedLoginPassword;
> return encodedHeader;
> }
>
> public static <T> T unmarshal(Class<T> docClass, InputStream
> inputStream) throws JAXBException {
> System.out.println("Class is: " + docClass);
> JAXBContext jc = JAXBContext.newInstance(docClass);
> Unmarshaller u = jc.createUnmarshaller();
> T object = (T) u.unmarshal(inputStream);
> return (T) object;
> }
> =================================================
>
>
> And here is Project class which is binding:
> ---------------------------------------------------------------------
> import javax.xml.bind.annotation.XmlRootElement;
>
> import main.java.***.ProticObject;
>
> @XmlRootElement(name = "project")
> public abstract class Project extends ProticObject {
>
> protected String projectName;
> protected String projectDescription;
> protected String remark;
> protected boolean isPrivate;
>
> public Project() {
> }
>
> public int getProjectId() {
> return projectId;
> }
>
> public void setProjectId(int projectId) {
> this.projectId = projectId;
> }
>
> [ other getters/setters ... ]
> }
> ---------------------------------------------------------------------
>
>
> Here is the XML what is returned by server, for exemple:
> =================================================
> <project>
> <dbId>127</dbId>
> <logId>0</logId>
> <projectId>127</projectId>
> <private>false</private>
> <projectDescription>
> Here is the description of the project...
> </projectDescription>
> <projectName>ARABIDOPSIS</projectName>
> <remark>
> Abstract:
> Here is the abstract...
> </remark>
> </project>[/CODE]
> =================================================
>
> Would someone have an idea on how resolve this problem please?
>
> Thanks a lot for your help.
>
> --
> Raphaël Flores
>
>
--
Raphaël Flores
Téléphone : 01 69 33 23 76
UMR de Génétique Végétale, INRA, Univ. Paris-Sud,
CNRS, AgroParisTech, F-91190 Gif-sur-Yvette, France