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[eclipselink-users] [MOXy] Open tags in wrong order when using XMLChoiceCollectionMapping and class hierarchy
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Hi,
I am seeing some weird behavior with both EclipseLink 1.0.2 and 1.1. I have
an object called Container that has a List of Properties. Property is
actually an abstract super class. The subclasses that may be stored in the
Container's list are Noun, Element, and Attribute. The XML looks like:
<Container xmlns="http://www.foo.com/bar/2";>
<Properties>
<Noun nounName="Metadata1" />
<Element nounName="Metadata2" maxOccurs="1" />
<Element nounName="Metadata3" maxOccurs="1" />
<Attribute nounName="Metadata4" />
</Properties>
</Container>
I am specifying this list using an XMLChoiceCollectionMapping. The xpaths
are "Properties/Noun", "Properties/Element", and "Properties/Attribute".
Unmarshalling works fine, but marshalling gives me a very strange result.
Instead of getting back the same XML as above, I get:
<Container xmlns="http://www.foo.com/bar/2";>
<Noun>
<Properties nounName="Metadata1" />
<Element nounName="Metadata2" maxOccurs="1" />
<Element nounName="Metadata3" maxOccurs="1" />
<Attribute nounName="Metadata4" />
</Properties>
</Container>
Notice that the Noun and Properties open tags are flipped! This is invalid
XML. I debugged into the EclipseLink code and found that the problem occurs
in XMLChoiceCollectionMappingMarshalNodeValue. The code snippet is:
if(associatedNodeValue != null) {
//Find the correct fragment
XPathFragment frag = associatedField.getXPathFragment();
while(frag != null) {
if(associatedNodeValue.isOwningNode(frag)) {
ContainerValue nestedNodeValue =
(ContainerValue)((XMLChoiceCollectionMappingUnmarshalNodeValue)associatedNodeValue).getChoiceElementNodeValue();
nestedNodeValue.marshalSingleValue(frag, marshalRecord, object,
fieldValue, session, namespaceResolver, marshalContext);
break;
}
frag = frag.getNextFragment();
//if next frag is null, call node value before the loop
breaks
if(frag == null) {
ContainerValue nestedNodeValue =
(ContainerValue)((XMLChoiceCollectionMappingUnmarshalNodeValue)associatedNodeValue).getChoiceElementNodeValue();
nestedNodeValue.marshalSingleValue(frag, marshalRecord,
object, fieldValue, session, namespaceResolver, marshalContext);
}
}
}
The problem is that for some reason, isOwningNode returns false for
"Properties" when evaluating "Properties/Noun". All the other xpaths
evaluate correctly.
I looked in the deployment descriptor mapping but it looks correct to me.
This leads me to think that what I'm seeing is a bug in EclipseLink. Do you
see something that I'm specifying incorrectly?
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
<class>com.foo.model.Container</class>
<alias>Container</alias>
<events xsi:type="event-policy"/>
<querying xsi:type="query-policy"/>
<attribute-mappings>
<attribute-mapping xsi:type="xml-choice-collection-mapping">
<attribute-name>properties</attribute-name>
<container-policy xsi:type="list-container-policy">
<collection-type>java.util.ArrayList</collection-type>
</container-policy>
<field-to-class-association>
<xml-field name="Properties/Noun" xsi:type="node"/>
<class-name>com.foo.model.Noun</class-name>
</field-to-class-association>
<field-to-class-association>
<xml-field name="Properties/Element" xsi:type="node"/>
<class-name>com.foo.model.Element</class-name>
</field-to-class-association>
<field-to-class-association>
<xml-field name="Properties/Attribute" xsi:type="node"/>
<class-name>com.foo.model.Attribute</class-name>
</field-to-class-association>
</attribute-mapping>
</attribute-mappings>
<descriptor-type>aggregate</descriptor-type>
<instantiation/>
<copying xsi:type="instantiation-copy-policy"/>
<default-root-element>Container</default-root-element>
<default-root-element-field name="Container" xsi:type="node">
<leaf-element-type>{http://www.foo.com/bar/2}ContainerType</leaf-element-type>
</default-root-element-field>
<namespace-resolver>
<namespaces/>
<default-namespace-uri>http://www.foo.com/bar/2</default-namespace-uri>
</namespace-resolver>
<schema xsi:type="schema-file-reference">
<schema-context>/ContainerType</schema-context>
<node-type>complex-type</node-type>
</schema>
</class-mapping-descriptor>
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
<class>com.foo.model.Property</class>
<alias>Property</alias>
<inheritance xsi:type="qname-inheritance-policy">
<class-indicator-field name="@dummy" xsi:type="node"/>
<class-indicator-mappings>
<class-indicator-mapping>
<class>com.foo.model.Noun</class>
<class-indicator xsi:type="xsd:string">NounType</class-indicator>
</class-indicator-mapping>
<class-indicator-mapping>
<class>com.foo.model.Element</class>
<class-indicator xsi:type="xsd:string">ElementType</class-indicator>
</class-indicator-mapping>
<class-indicator-mapping>
<class>com.foo.model.Attribute</class>
<class-indicator xsi:type="xsd:string">AttributeType</class-indicator>
</class-indicator-mapping>
</class-indicator-mappings>
</inheritance>
<events xsi:type="event-policy"/>
<querying xsi:type="query-policy"/>
<attribute-mappings>
<attribute-mapping xsi:type="xml-direct-mapping">
<attribute-name>nounName</attribute-name>
<field name="@nounName" xsi:type="node"/>
</attribute-mapping>
</attribute-mappings>
<descriptor-type>aggregate</descriptor-type>
<instantiation/>
<copying xsi:type="instantiation-copy-policy"/>
<namespace-resolver>
<namespaces/>
<default-namespace-uri>http://www.foo.com/bar/2</default-namespace-uri>
</namespace-resolver>
<schema xsi:type="schema-file-reference">
<schema-context>/PropertyType</schema-context>
<node-type>complex-type</node-type>
</schema>
</class-mapping-descriptor>
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
<class>com.foo.model.Noun</class>
<alias>Noun</alias>
<inheritance xsi:type="qname-inheritance-policy">
<parent-class>com.foo.model.Property</parent-class>
</inheritance>
<events xsi:type="event-policy"/>
<querying xsi:type="query-policy"/>
<descriptor-type>aggregate</descriptor-type>
<instantiation/>
<copying xsi:type="instantiation-copy-policy"/>
<namespace-resolver>
<namespaces/>
<default-namespace-uri>http://www.foo.com/bar/2</default-namespace-uri>
</namespace-resolver>
<schema xsi:type="schema-file-reference">
<schema-context>/NounType</schema-context>
<node-type>complex-type</node-type>
</schema>
</class-mapping-descriptor>
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
<class>com.foo.model.Element</class>
<alias>Element</alias>
<inheritance xsi:type="qname-inheritance-policy">
<parent-class>com.foo.model.Property</parent-class>
</inheritance>
<events xsi:type="event-policy"/>
<querying xsi:type="query-policy"/>
<attribute-mappings>
<attribute-mapping xsi:type="xml-direct-mapping">
<attribute-name>maxOccurs</attribute-name>
<field name="@maxOccurs" xsi:type="node"/>
</attribute-mapping>
</attribute-mappings>
<descriptor-type>aggregate</descriptor-type>
<instantiation/>
<copying xsi:type="instantiation-copy-policy"/>
<namespace-resolver>
<namespaces/>
<default-namespace-uri>http://www.foo.com/bar/2</default-namespace-uri>
</namespace-resolver>
<schema xsi:type="schema-file-reference">
<schema-context>/ElementType</schema-context>
<node-type>complex-type</node-type>
</schema>
</class-mapping-descriptor>
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
<class>com.foo.model.Attribute</class>
<alias>Attribute</alias>
<inheritance xsi:type="qname-inheritance-policy">
<parent-class>com.foo.model.Property</parent-class>
</inheritance>
<events xsi:type="event-policy"/>
<querying xsi:type="query-policy"/>
<descriptor-type>aggregate</descriptor-type>
<instantiation/>
<copying xsi:type="instantiation-copy-policy"/>
<namespace-resolver>
<namespaces/>
<default-namespace-uri>http://www.foo.com/bar/2</default-namespace-uri>
</namespace-resolver>
<schema xsi:type="schema-file-reference">
<schema-context>/AttributeType</schema-context>
<node-type>complex-type</node-type>
</schema>
</class-mapping-descriptor>
Thanks!
--Polly
--
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