The following comment has been added to this issue:
Author: Dennis Sosnoski
Created: Sat, 29 May 2004 3:43 PM
Body:
As Falk pointed out on the mailing list, there is a workaround for this problem if you
have control over the Java data structures. The workaround is to use a wrapper class
for the forward references, rather than using the references directly in the
collection. The wrapper class can be as simple as just:
public class ForwardWrapper {
public ForwardObject object;
}
(where ForwardObject is the class of the objects being referenced before they're
defined), but this will allow JiBX to fill the actual references in once they've been
unmarshalled.
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View this comment:
http://jira.codehaus.org/browse/JIBX-19?page=comments#action_20191
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View the issue:
http://jira.codehaus.org/browse/JIBX-19
Here is an overview of the issue:
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Key: JIBX-19
Summary: NullPointerException in ident="ref" within collection
Type: Bug
Status: Open
Priority: Major
Original Estimate: Unknown
Time Spent: Unknown
Remaining: Unknown
Project: JiBX
Components:
core
Versions:
1.0-beta3b
Assignee: Dennis Sosnoski
Reporter: Falk Langhammer
Created: Wed, 12 May 2004 11:48 AM
Updated: Sat, 29 May 2004 3:43 PM
Environment: JDK 1.4.2
Description:
java.lang.NullPointerException
at org.jibx.binding.def.PropertyDefinition.getName(PropertyDefinition.java:308)
at org.jibx.binding.def.ValueChild.createBackfillClass (ValueChild.java:185)
at org.jibx.binding.def.ValueChild.genParseIdRef(ValueChild.java:282)
at org.jibx.binding.def.ValueChild.genUnmarshal(ValueChild.java:400)
at org.jibx.binding.def.ValueChild.genContentUnmarshal(ValueChild.java:587)
at org.jibx.binding.def.NestedCollection.genContentUnmarshal(NestedCollection.java:130)
at org.jibx.binding.def.ObjectBinding.genUnmarshalContentCall(ObjectBinding.java:611)
at org.jibx.binding.def.ObjectBinding.genContentUnmarshal(ObjectBinding.java:723)
...
occurs with the following binding excerpt:
<mapping name="form" class="com.livis.xforms.desc.Form">
<collection name="constraints" field="constraints"/>
<value name="typeref" field="typeref" usage="optional"/>
<collection field="constraintrefs">
<value name="constraint-ref" type="com.livis.xforms.desc.Type" ident="ref"/>
</collection>
<structure field="layout" usage="optional"/>
</mapping>
<mapping name="type" class="com.livis.xforms.desc.Type">
<value name="name" field="name" ident="def" style="attribute"/>
</mapping>
...
This makes it impossible to unmarshall a list of pointers.
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