Hey,
I am building an application upon KIM whereby I need to check if a document
already exist in the repository before deciding on adding it.
To do this, I wrote the following code:
private boolean itemNotInRepository(Item item){
> assert(item != null);
> DocumentQuery query = new DocumentQuery();
> DocumentQueryResult queryResult = null;
> try {
> String escaped = QueryParser.escape(item.getDescription());
> query.setKeywordRestriction(escaped);
> queryResult = this.apiDR.getDocumentIds(query);
> } catch (KIMQueryException e) {
> e.printStackTrace();
> }
> return queryResult.isEmpty();
> }
Because some of the Strings, returned by item.getDescription(), might
contain special characters [mainly "(" and ")"], I added the String escaped
= QueryParser.escape(item.getDescription()) to my code, but nonetheless I
get a KIMQueryException:
com.ontotext.kim.client.query.KIMQueryException: Lucene special characters
> in field name in brackets: [Canalhopper.\(Duur\]
> at com.ontotext.kim.lucene.LuceneDocumentRepositoryImpl.getDocumentIds(
> LuceneDocumentRepositoryImpl.java:429)
> at com.ontotext.kim.coredb.CachingDocumentRepository.getDocumentIds(
> CachingDocumentRepository.java:91)
> at com.ontotext.kim.coredb.RdfCore.getDocumentIds(RdfCore.java:266)
> at com.ontotext.kim.coredb.CachingDocumentRepository.getDocumentIds(
> CachingDocumentRepository.java:91)
> at sun.reflect.GeneratedMethodAccessor86.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.openrdf.util.rmirouting.ChannelIfaceImpl.invoke(
> ChannelIfaceImpl.java:513)
> at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
> at sun.rmi.transport.Transport$1.run(Transport.java:159)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
> at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535
> )
> at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(
> TCPTransport.java:790)
> at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(
> TCPTransport.java:649)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(
> ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Exception in thread "main" java.lang.NullPointerException
> at knowledgeAcquisition.KIMKnowledgeAcquisition.itemNotInRepository(
> KIMKnowledgeAcquisition.java:147)
> at knowledgeAcquisition.KIMKnowledgeAcquisition.execute(
> KIMKnowledgeAcquisition.java:188)
> at run.Main.main(Main.java:21)
My guess is that KIM pre-checks the query (before processing it with Lucene)
and throws an error when a special character is found -- even though there
is an "\" before the special character. Any suggestions on how I can (1)
either avoid this error or (2) any other methods to check if a document
already exists in the document repository?
Any help is appreciated. Thanks in advanced!
Best regards,
Jeremy
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