BaseX-Talk May 2010

basex-talk@mailman.uni-konstanz.de

23 participants
30 discussions

Leave whitespaces in XML when loading XML file with new CreateDB
by Jiří Kadlec 17 Jun '10

17 Jun '10

Hi Guys, How can I preserve whitespaces in XML document, when i'm using new CreateDB(..) object for creating new database from Java code. When I export data with new Export(..) I get document with choped whitespaces. I found out, that there is a possibility to preserve whitespaces when I create DB from BaseX gui. There is a possibility to uncheck option chop whitespaces which gives me required result. Is there any way how to do this from Java. Thank you Jiri

4 9

Fwd: Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 02 Jun '10

02 Jun '10

Hi Lukas, just to be thorough I tried all the steps I have described in my earlier e-mail on a different workstations running a different OS (linux), and the attempt yielded the same Exception. Ciao Stefano On Fri, May 28, 2010 at 1:14 PM, Stefano Santoro <stefano(a)santoro.org> wrote: > Hi Lukas, > > Interesting. I have gotten all your maven repository jar files and > included them in the class path as follows: > > $ echo $GVYCP > C:\opt\jlib\basex-api\xmldb-api-1.0.jar;C:\opt\jlib\basex-api\xqj-api-1.0.jar;C:\opt\jlib\basex-api\basex-api-6.1.3.jar;C:\opt\jlib\basex-api\basex-6.1.3.jar > > the same but more clearly listed > > $ dvcp GVYCP > 0) C:\opt\jlib\basex-api\xmldb-api-1.0.jar > 1) C:\opt\jlib\basex-api\xqj-api-1.0.jar > 2) C:\opt\jlib\basex-api\basex-api-6.1.3.jar > 3) C:\opt\jlib\basex-api\basex-6.1.3.jar > > I have run the same java class I have enclosed in the earlier version > as follows: > > $ java -version > java version "1.6.0_17" > Java(TM) SE Runtime Environment (build 1.6.0_17-b04) > Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) > > $ java -cp ".;${GVYCP}" NPEReproducer > java.lang.ArrayIndexOutOfBoundsException: 5 > at org.basex.query.up.Primitives.add(Primitives.java:52) > at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) > at org.basex.query.up.Updates.add(Updates.java:90) > at org.basex.query.up.Insert.atomic(Insert.java:102) > at org.basex.query.up.Insert.atomic(Insert.java:30) > at org.basex.query.expr.Expr.iter(Expr.java:58) > at org.basex.query.QueryContext.iter(QueryContext.java:322) > at org.basex.query.QueryContext.iter(QueryContext.java:290) > at org.basex.api.xqj.BXQDynamicContext.execute(BXQDynamicContext.java:246) > at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) > at NPEReproducer.reproduceNPE(NPEReproducer.java:51) > at NPEReproducer.main(NPEReproducer.java:60) > > I have also checked out your basex trunk and was able to build > basex-6.1.3.jar, and even with that jar the same exception was thrown. > > I was not able to build the api maven project as it could not resolve > the jax-rx dependency.(see attached log) > > I was able though to build an api jar from your trunk that contained > only the xml:db and XQJ drivers from trunk, and with that too the same > exception was thrown. > > So I have tried with the jars that I have downloaded from: > > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/xmldb/xmldb-api/1.0/xml… > http://www.inf.uni-konstanz.de/dbis/basex/maven/javax/xml/xquery/xqj-api/1.… > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex-api/6.1.3/b… > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex/6.1.3/basex… > > I have also built basex-6.1.3.jar and basex-6.1.3.jar (w/o jaxrx) from > your trunk, and yet I was not able to run it as you were able to do. > > Is there anything I am missing? > > Ciao > Stefano > > > > On Fri, May 28, 2010 at 9:15 AM, Lukas Kircher > <lukaskircher1(a)googlemail.com> wrote: >> Hey Stefano, >> >> thanks for your report. >> >>> I am enclosing a java class file that reproduces this problem against >>> 6.1.3 basex jar files >> >> >> Unfortunately I wasn't able to reproduce the exception by running your >> code - neither with version 6.1.3 nor with our current repository version. >> It runs fine on my machine. Do you have a clue where I could've missed >> something? >> >> Or - if you have another case at hand where you encounter the same problem, >> just let us know and we'll see what we can do. >> >> Kind regards, >> Lukas >> >

2 2

Fwd: Re: dropping DataBase
by Leonard Wörteler 30 May '10

30 May '10

Hi Bea, i didn't realize that you're not on the basex-talk list. Sorry for that. Leo -------- Original-Nachricht -------- Betreff: Re: [basex-talk] dropping DataBase Datum: Sun, 30 May 2010 18:34:42 +0200 Von: Leonard Wörteler <leo(a)woerteler.de> An: basex-talk(a)mailman.uni-konstanz.de Hi again, Just in case you're interested: A simple way to create a main-memory based DB in BaseX, given the path to an XML document, would be final Data db = CreateDB.xml(IO.get(path), CTX.prop); CTX.openDB(db); // open DB in current Context By the way, this also works if you feed IO.get(..) an XML string instead of a path. Cheers again, Leo Am 30.05.2010 17:10, schrieb Leonard Wörteler: > Hello Beatriz, > > Am 30.05.2010 16:32, schrieb Beatriz Sancho: >> static public Vector queryExtraeDatosCabecera(final String query) throws >> BaseXException, QueryException, IOException { >> WorkSpace sp1 = new WorkSpace(); >> String workspace = sp1.getWorkspace(); >> new CreateDB(workspace + "\\cabecera.xml", "DBCabecera").execute(CONTEXT); >> [...] >> new DropDB("DBCabecera").execute(CONTEXT); >> return datos; >> } > > wouldn't it be much easier to use an in-memory DB in this case? No need > to explicitly drop it and you probably would even get better performance > because of reduced I/O. > > Just my 0.02$...

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dropping DataBase
by bea.sancho＠gmail.com 30 May '10

30 May '10

Do you have any idea about this? org.basex.core.BaseXException: Database could not be dropped. at org.basex.core.Proc.execute(Proc.java:75) when it does: new DropDB("DBCabecera").execute(CONTEXT); My program is doing a lot of actions to get some information and sometimes this error appears, do you know why? How can i solve it? Another question, what would happen if I create a lot of news DB with the same name and i don't drop them? Thank you very much!

5 4

nasty bug with xquery empty sequence ()
by Sandra Maria Silcot 30 May '10

30 May '10

To basex developers, The following xquery returns 464 <persName> elements with saxonHE but fails to produce any <persName> elements when the query is run in basex (6.1.3). for $RT in ("c31a") let $theseRecs := //c31a[sourceVol="CON 31/2"] let $ctr := count($theseRecs) let $pList := <listPersName n="{$ctr}">{ for $p at $i in $theseRecs let $conref := if ( $RT = "c37v" ) then <hi/> else () return <persName id="{$p/@xml:id}">{$i}</persName> }</listPersName> return ( $pList,<hello/> ) If the xquery null sequence () in line 6 is changed to an empty string: else "" I get the expected 464 results. With () in the else I get only this: <listPersName n="464"/> <hello/> I had a devil of a time detecting this. I also have encountered bad behaviour when running queries against attributes which exist but have no value, like this: <el attr=""> In Saxon I can search for //el[@attr=""] and get results but basex does not find these cases. Hoping these bugs can be quickly squashed. regards, Sandra

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Re: [basex-talk] Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 29 May '10

29 May '10

Hi Lukas, Interesting. I have gotten all your maven repository jar files and included them in the class path as follows: $ echo $GVYCP C:\opt\jlib\basex-api\xmldb-api-1.0.jar;C:\opt\jlib\basex-api\xqj-api-1.0.jar;C:\opt\jlib\basex-api\basex-api-6.1.3.jar;C:\opt\jlib\basex-api\basex-6.1.3.jar the same but more clearly listed $ dvcp GVYCP 0) C:\opt\jlib\basex-api\xmldb-api-1.0.jar 1) C:\opt\jlib\basex-api\xqj-api-1.0.jar 2) C:\opt\jlib\basex-api\basex-api-6.1.3.jar 3) C:\opt\jlib\basex-api\basex-6.1.3.jar I have run the same java class I have enclosed in the earlier version as follows: $ java -version java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) $ java -cp ".;${GVYCP}" NPEReproducer java.lang.ArrayIndexOutOfBoundsException: 5 at org.basex.query.up.Primitives.add(Primitives.java:52) at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) at org.basex.query.up.Updates.add(Updates.java:90) at org.basex.query.up.Insert.atomic(Insert.java:102) at org.basex.query.up.Insert.atomic(Insert.java:30) at org.basex.query.expr.Expr.iter(Expr.java:58) at org.basex.query.QueryContext.iter(QueryContext.java:322) at org.basex.query.QueryContext.iter(QueryContext.java:290) at org.basex.api.xqj.BXQDynamicContext.execute(BXQDynamicContext.java:246) at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) at NPEReproducer.reproduceNPE(NPEReproducer.java:51) at NPEReproducer.main(NPEReproducer.java:60) I have also checked out your basex trunk and was able to build basex-6.1.3.jar, and even with that jar the same exception was thrown. I was not able to build the api maven project as it could not resolve the jax-rx dependency.(see attached log) I was able though to build an api jar from your trunk that contained only the xml:db and XQJ drivers from trunk, and with that too the same exception was thrown. So I have tried with the jars that I have downloaded from: http://www.inf.uni-konstanz.de/dbis/basex/maven/org/xmldb/xmldb-api/1.0/xml… http://www.inf.uni-konstanz.de/dbis/basex/maven/javax/xml/xquery/xqj-api/1.… http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex-api/6.1.3/b… http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex/6.1.3/basex… I have also built basex-6.1.3.jar and basex-6.1.3.jar (w/o jaxrx) from your trunk, and yet I was not able to run it as you were able to do. Is there anything I am missing? Ciao Stefano On Fri, May 28, 2010 at 9:15 AM, Lukas Kircher <lukaskircher1(a)googlemail.com> wrote: > Hey Stefano, > > thanks for your report. > >> I am enclosing a java class file that reproduces this problem against >> 6.1.3 basex jar files > > > Unfortunately I wasn't able to reproduce the exception by running your > code - neither with version 6.1.3 nor with our current repository version. > It runs fine on my machine. Do you have a clue where I could've missed > something? > > Or - if you have another case at hand where you encounter the same problem, > just let us know and we'll see what we can do. > > Kind regards, > Lukas >

3 2

rename database
by szabolcs kurdi 28 May '10

28 May '10

Hi! I'm trying to embed BaseX into a smaller java project - pretty much everything works perfectly, but I can't seem to find a way to rename an existing database: am I missing something? I use CreateDB, DropDB and InfoDB - is there something like RenameDB? Or shall I try to rename the directory at the user's home dir in BaseXData? Thank you! Szabolcs Kurdi PS: probably it is widely known, but in the gui the query editor is badly broken with international keyboards (like using the AltGr key).

2 1

Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 27 May '10

27 May '10

Hi Christian, when I try to reuse the same prepared expression the second time with a different bound document I get the following array out of bound exception: java.lang.ArrayIndexOutOfBoundsException: 5 at org.basex.query.up.Primitives.add(Primitives.java:52) at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) at org.basex.query.up.Updates.add(Updates.java:91) at org.basex.query.up.Insert.atomic(Insert.java:102) at org.basex.query.up.Insert.atomic(Insert.java:1) at org.basex.query.expr.Expr.iter(Expr.java:53) at org.basex.query.QueryContext.iter(QueryContext.java:322) at org.basex.query.QueryContext.iter(QueryContext.java:290) at org.basex.api.xqj.BXQDynamicContext.execute(BXQDynamicContext.java:246) at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) at NPEReproducer.reproduceNPE(NPEReproducer.java:51) at NPEReproducer.main(NPEReproducer.java:60) I am enclosing a java class file that reproduces this problem against 6.1.3 basex jar files Ciao Stefano

1 0

Having trouble inserting elements using XQJ
by stefano＠santoro.org 26 May '10

26 May '10

Hi, I am attempting to execute an XQJ prepared expression that uses an external bind variable that accepts an xml element, and inserts it into the database document: declare variable $inserto as element(*,xs:untyped) external; let $root := basex:db('Annotations')/Annotations return (insert node $inserto into $root) I prepare the above statement and I bind DOM element as follows (groovy syntax): eltype = conn.createElementType(null, XQItemType.XQBASETYPE_ANYTYPE); ixpr.bindNode(new QName("inserto"), irel, eltype); irel is dom element that serializes as follows: <inserto id="6"> <testo>six</testo> </inserto> unfortunately I get an NPE when I try to execute the Query: groovy:000> rs = ixpr.executeQuery() ERROR java.lang.NullPointerException: null at org.basex.query.item.FElem.copy (FElem.java:214) at org.basex.query.item.FElem.copy (FElem.java:1) at org.basex.query.item.FElem.copy (FElem.java:210) at org.basex.query.item.FElem.copy (FElem.java:1) at org.basex.query.expr.Constr.add (Constr.java:107) at org.basex.query.expr.Constr.<init> (Constr.java:53) at org.basex.query.up.Insert.atomic (Insert.java:60) at org.basex.query.up.Insert.atomic (Insert.java:1) at org.basex.query.expr.Expr.iter (Expr.java:53) at org.basex.query.QueryContext.iter (QueryContext.java:322) at org.basex.query.QueryContext.iter (QueryContext.java:290) at org.basex.api.xqj.BXQDynamicContext.execute (BXQDynamicContext.java:247) at org.basex.api.xqj.BXQPreparedExpression.executeQuery (BXQPreparedExpression.java:54) at groovysh_evaluate.run (groovysh_evaluate:10) ... I am using BaseX 6.1 Am I doing anything wrong? Stefano

3 4

gui version possible bug with handling xml attributes?
by Sandra Maria Silcot 26 May '10

26 May '10

Hello all, I am experiencing this odd behaviour in the gui version of basex v6.1 on windows xp. When using the Explorer panel and I choose an attribute (prefixed with "@"), the query info panel reports: Error: [XPST0003] Unexpected end of query: '@seriesId[text(...'. It presents the attribute values correctly in the drop down display, but if I select a value or try to filter, nothing happens and the error message is repeated. It looks like it thinks its processing an element. Shouldn't attribute queries be written as "data(@attrName)"? I am not sure when this crept in. Is anyone else experiencing this behavior? I am getting this on any xml document having attributes in the gui version. Thanks for any insight. Cheers all, Sandra

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BaseX-Talk May 2010