ClassCastException: cannot be cast to com.sun.xml.bind.v2.runtime.reflect.Accessor #1449
Comments
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Any way one can reproduce the problem? This has nothing to do with activation.jar. |
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it's more likely related to #1352 ; what happens when you start JVM with |
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Thanks for the insight! When setting that Java property to true, the problem goes away. When setting to false, the problem reoccurs. |
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@danielkec this is related to your changes. Any idea what's wrong? |
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@merusso Would it be possible to share how is declared field |
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Sure. It might be helpful to know that this is generated Java source from a SOAP WSDL. import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.XmlValue;
import javax.xml.datatype.XMLGregorianCalendar;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "dateTime", propOrder = {
"value"
})
public class DateTime {
@XmlValue
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar value;
public XMLGregorianCalendar getValue() {
return value;
}
public void setValue(XMLGregorianCalendar value) {
this.value = value;
}
} |
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@danielkec, is this enough info for you to reproduce successfully? Please let me know if you need anything else. |
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This regression in a patch version is not ideal. Would it be reasonable to change this feature flag's default state to false (opt-in) for 2.3.x to avoid this regression? |
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@lukasj @danielkec I totally agree with @merusso that make this flag to false by default to backward compatible with jaxb 2.3.2. Is there any performance improvement number by #1352 ? |
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@lukasj @danielkec @merusso I already sent two PRs to set this flag to true by default : #1525, #1524. Please review and guide me what I need to do before the merge. |
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I was able to replicate on jdk 1.8.0_221 with class AccessorCast1449Test {
static final String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n" +
"<testEntity>\n" +
" <dateTime>2021-03-25T09:34:49.877</dateTime>\n" +
"</testEntity>";
@Test
void accessorCast() throws JAXBException {
System.setProperty("com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.noOptimization","false");
ClassLoader parent = Thread.currentThread().getContextClassLoader();
// Using jdk's internal JAXB to unmarshall
Thread.currentThread().setContextClassLoader(CustomJaxbClassLoader.internalJaxbLoader(parent));
JAXBContext contextInternal = com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl
.newInstance(TestEntity.class, TestEntity.DateTime.class);
TestEntity unmarshaled = (TestEntity) contextInternal.createUnmarshaller()
.unmarshal(new StringReader(xml));
System.out.println(unmarshaled);
// And org.glassfish.jaxb:jaxb-runtime:2.3.3 for marshalling same entity
Thread.currentThread().setContextClassLoader(CustomJaxbClassLoader.riJaxbLoader(parent));
JAXBContext contextGlassfish = com.sun.xml.bind.v2.runtime.JAXBContextImpl
.newInstance(TestEntity.class, TestEntity.DateTime.class);
Marshaller mar = contextGlassfish.createMarshaller();
StringWriter writer = new StringWriter();
mar.marshal(unmarshaled, writer);
System.out.println(writer);
}
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public static class TestEntity {
private DateTime dateTime;
public TestEntity() {
}
public DateTime getDateTime() {
return dateTime;
}
public void setDateTime(final DateTime dateTime) {
this.dateTime = dateTime;
}
@Override
public String toString() {
return String.valueOf(dateTime.value);
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "dateTime", propOrder = {
"value"
})
public static class DateTime {
@XmlValue
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar value;
public XMLGregorianCalendar getValue() {
return value;
}
public void setValue(XMLGregorianCalendar value) {
this.value = value;
}
}
}
public static class CustomJaxbClassLoader extends ClassLoader {
static {
URL.setURLStreamHandlerFactory(protocol -> {
if("customjaxb".equals(protocol)){
return new URLStreamHandler() {
@Override
protected URLConnection openConnection(final URL u) throws IOException {
return new URLConnection(u) {
@Override
public InputStream getInputStream() throws IOException {
System.out.println("Custom JAXB context factory "+u.getHost());
return new ByteArrayInputStream(u.getHost().getBytes());
}
@Override
public void connect() throws IOException {
//noop
}
};
}
};
}
return null;
});
}
private final String contextFactory;
private CustomJaxbClassLoader(final ClassLoader parent, String contextFactory) {
super(parent);
this.contextFactory = contextFactory;
}
public static ClassLoader internalJaxbLoader(final ClassLoader parent) {
return new CustomJaxbClassLoader(parent, "com.sun.xml.internal.bind.v2.ContextFactory");
}
public static ClassLoader riJaxbLoader(final ClassLoader parent) {
return new CustomJaxbClassLoader(parent, "com.sun.xml.bind.v2.ContextFactory");
}
@Override
public URL getResource(final String name) {
if (name.equals("META-INF/services/javax.xml.bind.JAXBContext")) {
try {
return new URL("customjaxb://" + contextFactory);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
return super.getResource(name);
}
}
} |
Version: 2.3.3
In a Java 8 app, after upgrading the jaxb-runtime from 2.3.2 to 2.3.3, an exception is thrown when using JAX-B as part of a SOAP service call.
I believe this relates to #1284, which changed from using jakarta.activation-api to jakarta.activation.
Exception snippet:
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