I just discovered that using references only works when there is no
inheritance. (latest CVS)
Let us say this is the mapping file:
------------------------------------
<mapping>
<class name="javax.vecmath.Vector3d">
<field direct="true" name="x" type="double">
<bind-xml node="attribute"/>
</field>
<field direct="true" name="y" type="double">
<bind-xml node="attribute"/>
</field>
<field direct="true" name="z" type="double">
<bind-xml node="attribute"/>
</field>
</class>
<class name="dk.ifad.adt.Composite" identity="name">
<map-to xml="Composite"/>
<field
direct="false"
name="name"
type="string"
set-method="setName"
get-method="getName">
<bind-xml node="attribute"/>
</field>
<field
direct="false"
name="Component"
type="dk.ifad.adt.Composite"
collection="array"
set-method="addComponent"
get-method="getComponents">
<bind-xml node="element" reference="true"/>
</field>
</class>
<class name="dk.ifad.sim.SimComponent"
extends="dk.ifad.adt.Composite">
<field
direct="false"
name="Translation"
type="javax.vecmath.Vector3d">
<bind-xml name="position" node="element"/>
</field>
</class>
</mapping>
Notice that SimComponent extends Composite.
Then marshalling to this will work when house1 & house2 = Composite:
-----------------------------------
<Composite name="City"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:type="java:dk.ifad.adt.Composite">
<Component name="House1"/>
<Component name="House2"/>
</Composite>
Note that the referered element still works even though Kieth Visco
wrote that it would only work when the identity field AND the referered
field both is attributes. :)
But will NOT work when house1 & house2 = SimComponent who inherits from
Composite:
---------------------------------------
<Composite name="City"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:type="java:dk.ifad.adt.Composite">
<dk.ifad.sim.SimComponent name="House1">
<position x="0.0" y="0.0" z="0.0">
</dk.ifad.sim.SimComponent>
<dk.ifad.sim.SimComponent name="House2">
<position x="0.0" y="0.0" z="0.0">
</dk.ifad.sim.SimComponent>
</Composite>
BUG 1: (maybe a feature request)
It would be nice if references fields would work also in inherited
classes. (see above explanation)
BUG 2: (real bug)
When specifying the array in the above listed mapping file as an
attribute I get this:
java.lang.ClassCastException:
org.exolab.castor.mapping.loader.J1CollectionHandlers$ArrayEnumerator
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:782)
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:540)
at dk.ifad.experimental.MTest2.main(MTest2.java:105)
BUG 3: (real bug)
If the array in the above listed mapping file is not an array but
normal object, and specified as an attribute(as Keith recommends), I get
this:
Unable to resolve ID for instance of class '[Ldk.ifad.adt.Composite;'
due to the following error: Unable to resolve ClassDescriptor.
at
org.exolab.castor.xml.Marshaller.getObjectID(Marshaller.java:1031)
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:792)
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:969)
at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:540)
at dk.ifad.experimental.MTest.main(MTest.java:104)
Somebody please reply on this mail.
Nikolai
----------------------------------------------
Nikolai V. Christensen, Computer Engineer,
Simulation and Training department
IFAD, Forskerparken 10A, DK-5230 Odense M
Phone: +45 63 15 71 31 Fax: +45 65 93 29 99
WWWeb: http://www.ifad.dk
e-mail: [EMAIL PROTECTED]
----------------------------------------------
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