[MCHANGES-97] Fix VTL errors

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0-beta-3
• Fix Version/s: 2.0
• Component/s: announcement
• Flags: Patch
• Assignee: Dennis Lundberg
• Reporter: Benjamin Bentmann
• Created: 22/Jan/08 17:26
• Updated: 08/Apr/15 08:02
• Resolved: 05/Feb/08 17:32

Description

When calling mvn changes:announcement-generate for the attached changes.xml VTL errors are logged due to the various null fields in the Action bean:

[INFO] [changes:announcement-generate]
[INFO] Creating announcement file from changes.xml...
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 30, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 31, column 1]
[ERROR] Left side ($!issue) of '!=' operation has null value. Operation not possible. org/apache/maven/plugin/announcement/announcement.vm [line 32, column 27]
[ERROR] Left side ($!dueto) of '!=' operation has null value. Operation not possible. org/apache/maven/plugin/announcement/announcement.vm [line 32, column 65]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 43, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 44, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 56, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 57, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 69, column 1]
[ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm [line 70, column 1]
[INFO] File created...

The attached patch goes the hard way and improves the VTL template to check for nulls. Easier would be to establish an invariant for the bean properties stating that they are never null but maybe empty, i.e. change all the setters to convert null into an empty string.