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 take notice of this mail.
Marshalling references is VERY important for developors not using databases.
Castor could be much more widely used if these three bugs were solved.
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]
----------------------------------------------
-----------------------------------------------------------
If you wish to unsubscribe from this mailing, send mail to
[EMAIL PROTECTED] with a subject of:
unsubscribe castor-dev
