German output has no chunker information

[fotisj]

At the moment the German pipeline does not support chunking, probably because opennlp for German has no model for chunking. Now, the treetagger supports chunking for German and the DKPRO-Wrapper supports Treetagger, so it should be possible to integrate chunking. Would be great to have this included in the next update :-)

[thvitt]

While the tree tagger chunker already is part of the wrapper, we get this exception

2017-06-06T12:17:37,729 ERROR   org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl       Exception occurred
org.apache.uima.analysis_engine.AnalysisEngineProcessException: Annotator processing failed.
        at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:401) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:308) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:570) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:412) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:344) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:265) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:269) [ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.fit.pipeline.SimplePipeline.runPipeline(SimplePipeline.java:150) [ddw-0.4.7-SNAPSHOT.jar:?]
        at de.tudarmstadt.ukp.dariah.pipeline.RunPipeline.main(RunPipeline.java:645) [ddw-0.4.7-SNAPSHOT.jar:?]
Caused by: java.lang.NullPointerException
        at org.annolab.tt4j.TreeTaggerWrapper.removeProblematicTokens(TreeTaggerWrapper.java:707) ~[ddw-0.4.7-SNAPSHOT.jar:?]
        at org.annolab.tt4j.TreeTaggerWrapper.process(TreeTaggerWrapper.java:579) ~[ddw-0.4.7-SNAPSHOT.jar:?]
        at de.tudarmstadt.ukp.dkpro.core.treetagger.TreeTaggerChunker.process(TreeTaggerChunker.java:293) ~[ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_component.JCasAnnotator_ImplBase.process(JCasAnnotator_ImplBase.java:48) ~[ddw-0.4.7-SNAPSHOT.jar:?]
        at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:385) ~[ddw-0.4.7-SNAPSHOT.jar:?]
        ... 8 more

for the following config:

useChunker = true
chunker = de.tudarmstadt.ukp.dkpro.core.treetagger.TreeTaggerChunker
chunkerArguments = executablePath,string,/opt/tree-tagger/bin/tree-tagger,\
        modelLocation,string,/opt/tree-tagger/lib/german-chunker.par,\
        modelEncoding,string,utf-8