Hi everyone,
I'm a german student and currently working at my bachelor
thesis. I'm new to this mailing list so I hope my question
is suitable for you.
I'm using Genetic Algorithms to create rules which processes /
annotates the JCases. After that, the results are evaluated and
a F-Score is returned which flows into the fitness function of
the genetic algorithm. So I'm only using the JCases for
evaluation and don't need to write them back.
I already tried the CasCopier.copyCas() method:
public static JCas copyJCas(JCas aJCas) {
JCas jcas = null;
jcas = JCasFactory.createJCas(UIMATestUtils.readTypeSystem());
CasCopier.copyCas(aJCas.getCas(), jcas.getCas(), true);
return jcas;
}
but I'm getting these two exceptions with the following
stacktraces:
Exception in thread "ECJ Evaluation Thread 0"
java.lang.ArrayIndexOutOfBoundsException: 1015
at org.apache.uima.jcas.impl.JCasHashMap.put(JCasHashMap.java:139)
at
org.apache.uima.jcas.impl.JCasImpl.putJfsFromCaddr(JCasImpl.java:1035)
at
org.apache.uima.jcas.impl.JCasImpl$JCasFsGenerator.createFS(JCasImpl.java:847)
at org.apache.uima.cas.impl.CASImpl.ll_getFSForRef(CASImpl.java:3117)
at org.apache.uima.cas.impl.CASImpl.createFS(CASImpl.java:1773)
at
org.apache.uima.cas.impl.FeatureStructureImpl.getFeatureValue(FeatureStructureImpl.java:234)
at org.apache.uima.util.CasCopier.copyFeatures(CasCopier.java:312)
at org.apache.uima.util.CasCopier.copyFs(CasCopier.java:190)
at org.apache.uima.util.CasCopier.copyCasView(CasCopier.java:149)
at org.apache.uima.util.CasCopier.copyCas(CasCopier.java:108)
at rulevolution.utils.JCasUtils.copyJCas(JCasUtils.java:80)
at rulevolution.utils.JCasUtils.copyCasPool(JCasUtils.java:94)
at rulevolution.RulEvolution.evaluate(RulEvolution.java:105)
at ec.simple.SimpleEvaluator.evalPopChunk(SimpleEvaluator.java:259)
at
ec.simple.SimpleEvaluator$SimpleEvaluatorThreadCG.run(SimpleEvaluator.java:341)
at ec.util.ThreadPool$PoolThread.run(ThreadPool.java:57)
Exception in thread "ECJ Evaluation Thread 2"
java.lang.IndexOutOfBoundsException: Index: 0, Size: 1
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at
org.apache.uima.cas.impl.FSIndexRepositoryImpl$LeafPointerIterator.initPointerIterator(FSIndexRepositoryImpl.java:628)
at
org.apache.uima.cas.impl.FSIndexRepositoryImpl$LeafPointerIterator.<init>(FSIndexRepositoryImpl.java:636)
at
org.apache.uima.cas.impl.FSIndexRepositoryImpl$LeafPointerIterator.<init>(FSIndexRepositoryImpl.java:612)
at
org.apache.uima.cas.impl.FSIndexRepositoryImpl.createPointerIterator(FSIndexRepositoryImpl.java:158)
at
org.apache.uima.cas.impl.FSIndexRepositoryImpl$IndexImpl.iterator(FSIndexRepositoryImpl.java:792)
at org.apache.uima.util.CasCopier.copyCasView(CasCopier.java:145)
at org.apache.uima.util.CasCopier.copyCas(CasCopier.java:108)
at rulevolution.utils.JCasUtils.copyJCas(JCasUtils.java:80)
at rulevolution.utils.JCasUtils.copyCasPool(JCasUtils.java:94)
at rulevolution.RulEvolution.evaluate(RulEvolution.java:105)
at ec.simple.SimpleEvaluator.evalPopChunk(SimpleEvaluator.java:259)
at
ec.simple.SimpleEvaluator$SimpleEvaluatorThreadCG.run(SimpleEvaluator.java:341)
at ec.util.ThreadPool$PoolThread.run(ThreadPool.java:57)
My goal would be generating a JCas pool at beginning of the algorithm. Then
cloning the entire
jcas pool for each rule evaluation. After the rule is evaluated the cloned cas
pool needs to be
deleted.
Does someone know why I'm getting these exceptions and are there some ways to
work with JCas objects outside of UIMA Concext?
Greetings
Bojan
