[CAUSEWAY-295] NullPointerException when view aggregated entity using Wicket viewer

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Implemented
• Affects Version/s: viewer-wicket-1.0.0
• Fix Version/s: viewer-wicket-1.2.0
• Component/s: Viewer Wicket
• Environment: IDE:eclipse OS:Win7 64bit
• Assignee: Daniel Keir Haywood
• Reporter: Alain.Zhang
• Created: 07/Jan/13 07:03
• Updated: 05/May/15 11:21
• Resolved: 07/Mar/13 22:19

Description

I have tried the isis 1.0.0,and there is a problem with wicket viewer. The wicket viewer provide a view link for an aggregated entity,and I caught exception such as:
Caused by: java.lang.NullPointerException
at java.util.regex.Matcher.getTextLength(Unknown Source)
at java.util.regex.Matcher.reset(Unknown Source)
at java.util.regex.Matcher.<init>(Unknown Source)
at java.util.regex.Pattern.matcher(Unknown Source)
at org.apache.isis.core.metamodel.adapter.oid.OidMarshaller.unmarshal(OidMarshaller.java:125)
at org.apache.isis.viewer.wicket.model.models.EntityModel.rootOidFrom(EntityModel.java:142)
at org.apache.isis.viewer.wicket.model.models.EntityModel.<init>(EntityModel.java:124)
at org.apache.isis.viewer.wicket.ui.pages.entity.EntityPage.<init>(EntityPage.java:49)
... 35 more

I created a demo project on github for the problem,the repository located at:https://github.com/alainzhang/isis-demo.git