[jibx-users] JiBXException: "No unmarshaller for element" with interface fields

[Dave Schoorl]

I am new to JiBX and I get a "No marshaller for element ..."-exception, when I 
unmarshall an xml file. I do not define namespaces in the xml or the mapping. 
When I change all type references to iImpl in class A from interface I to 
implementation class B, then it's working, but obviously, that's not what I 
want.

Below my Java classes:

/**
 * A marker interface; no methods defined
 */
public interface I { }


/**
 * This class does not know the implementation of it's field I
 */
public class A {
        
        private I iImpl = null;
        
        public I getI() {
                return iImpl;
        }
        
        public void setI(I iImpl) {
                this.iImpl = iImpl;
        }
}


/**
 * One of the possible implementations of interface I
 */
public class B implements I {
        
        private String c = null;
        
        public B() {}
        
        public B(String c) {
                setC(c);
        }
        
        public String getC() {
                return this.c;
        }
        
        private void setC(String c) {
                if (c == null) {
                        throw new IllegalArgumentException("c is mandatory");
                }
                this.c = c;
        }
}


My mapping file:
<binding>
    <mapping name="Aaaa" class="A">
        <structure name="Bbbb" get-method="getI" set-method="setI" 
create-type="B"/>
    </mapping>
    <mapping abstract="true" class="B">
        <value name="Cccc" field="c" set-method="setC"/>
    </mapping>
</binding>



My xml snippet
<Aaaa>
  <Bbbb>
    <Cccc>1</Cccc>
  </Bbbb>
</Aaaa>


The stacktrace:
org.jibx.runtime.JiBXException: No unmarshaller for element "Cccc" (line 4, col 
11)
        at 
org.jibx.runtime.impl.UnmarshallingContext.unmarshalElement(UnmarshallingContext.java:2754)
        at 
my.pack.JiBX_binding_AInterfaceMungeAdapter.JiBX_binding_AInterface_unmarshal_1_0()
        at 
my.pack.AInterfaceField.JiBX_binding_AInterface_unmarshal_1_0(AInterfaceField.java)
        at my.pack.JiBX_binding_AInterfaceAInterfaceField_access.unmarshal()
        at 
org.jibx.runtime.impl.UnmarshallingContext.unmarshalElement(UnmarshallingContext.java:2757)
        at 
org.jibx.runtime.impl.UnmarshallingContext.unmarshalDocument(UnmarshallingContext.java:2900)
        at 
my.pack.AInterfaceDatabindingTest.testUnmarshallAInterface(AInterfaceDatabindingTest.java:24)
        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:597)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
        at 
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
        at 
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
        at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
        at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
        at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
        at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)


Can somebody please tell me what I am doing wrong?

Thanks in advance,
Dave
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