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https://issues.apache.org/jira/browse/STANBOL-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rupert Westenthaler resolved STANBOL-1257.
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Resolution: Fixed
Fix Version/s: 0.12.0
fixed with http://svn.apache.org/r1558701 in 0.12 and
http://svn.apache.org/r1558748 in trunk
> EntityhubDereferenceEngine fails if an empty String is parsed as dereference
> field
> ----------------------------------------------------------------------------------
>
> Key: STANBOL-1257
> URL: https://issues.apache.org/jira/browse/STANBOL-1257
> Project: Stanbol
> Issue Type: Bug
> Components: Enhancement Engines
> Affects Versions: 0.12.0
> Reporter: Rupert Westenthaler
> Assignee: Rupert Westenthaler
> Fix For: 0.12.0
>
>
> If [""] is parsed as dereference fields the engine creates a FieldMapper
> instance but will not add a single mapping as "" is not valid. As a result
> the FieldMapper will reject all fields and therefore causes no data to be
> dereferenced wile this config should rather dereference all fields of the
> Entity.
> The same Issue can be also achieved by parsing any other invalid field
> mapping, but an empty configuration is the most likely reason causing this.
> To fix this the activation method needs to check if a valid FieldMapping was
> parsed and if not do not create a FieldMapper instance.
> As a Workaround users should parse ["*"] instead of an empty string.
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