BaseX-Talk

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5250 discussions

Re: [basex-talk] Java DOM Interface and updating XQueries
by Ingo Dengler 12 Jun '13

12 Jun '13

Hi, Sorry for posting the first message in HTML format (damn web mailer...). Here is it again in Text only: I have a problem using BaseX Java DOM Node Interface and updating XQuerys in combination. The problem is that on updating the XML structure the node "pointer" moves to another location therefore the BXNode Object points to the wrong node. I have investigated a bit and the problem seems to be the 'pre' attribute in Class DBNode that points to the wrong/old location. There is already an uninque ID in ANode that could be used to identify the right node. But a ID->pre mapping table is missing. Any solution/workaround for this issue? Best regards, Ingo See following snippet that demonstrates the issue: import java.io.ByteArrayInputStream; import org.basex.api.dom.BXNode; import org.basex.core.Context; import org.basex.core.Prop; import org.basex.core.cmd.CreateDB; import org.basex.core.cmd.Set; import org.basex.query.QueryProcessor; import org.basex.query.value.item.Item; import org.basex.query.value.node.ANode; public class UpdateAndDOM { public static void main(String[] args) throws Exception { // create test DB in memory Context context = new Context(); new Set(Prop.MAINMEM, true).execute(context); ByteArrayInputStream bais = new ByteArrayInputStream("<root><node1/></root>".getBytes()); CreateDB cmd = new CreateDB("testDB"); cmd.setInput(bais); cmd.execute(context); //get DOM node "node1" QueryProcessor query = new QueryProcessor("//node1", context); query.execute(); Item item = query.iter().next(); Object elem = BXNode.get((ANode)item); BXNode node1 = (BXNode)elem; System.out.println("Expected node1 is: " + node1.getNodeName()); //updating query that inserts data before node1 String xpath = "insert node <newNode/> before /root/node1"; query = new QueryProcessor(xpath, context); query.execute(); System.out.println("Expected node1 is: " + node1.getNodeName()); } }

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Bind Externals via RUN Command
by James Hughes 12 Jun '13

12 Jun '13

Hello, I'm wondering if it is at all possible to an external variable to a query when it is being executed via the RUN command? e.g. RUN /queries/country.xq Which has (condensed for brevity) declare variable $country_code external; //iati-activity/recipient-country[@code='{ $country_code }']/ Is this possible when calling from a client? James

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CloudHub 101 Webinar [Register]
by Cameron Coles 11 Jun '13

11 Jun '13

Live Webinar <http://www.mulesoft.com> >From zero to integration in 15 minutes with CloudHub <http://www.mulesoft.com/webinars/cloudhub-integration-demo> The myth is that integration takes weeks to build and deploy, not minutes. Join this live demo and follow along as we show how to integrate SaaS and on-premise applications at cloud speed. Don’t forget to bring your stopwatch to test whether this is myth is confirmed or busted. This MuleSoft event will cover: - Creating a CloudHub account - Configuring a message queue to Salesforce integration flow - Deploying integration to CloudHub - Monitoring performance from CloudHub Insight The demo will be followed by an interactive Q&A session. Register Now » Thursday, June 13, 2013 8AM Pacific, 11AM Eastern, 16:00 BST Forward to a colleague » <http://resources.mulesoft.com/index.php/email/emailWebview?ftf=true&mkt_tok…> Presenter: Tom Motley, Sr. Solutions Consultant, MuleSoft Date: Thursday, June 13, 2013 Time: 8AM Pacific, 11AM Eastern, 16:00 BST Length: 45 Minutes <http://www.mulesoft.com/webinars/cloudhub-integration-demo> Presenter: Tom Motley Sr. Solutions Consultant, MuleSoft <http://www.mulesoft.com/webinars/cloudhub-integration-demo> <http://www.mulesoft.com> <mailto:info@mulesoft.com> <http://blogs.mulesoft.org/> <http://twitter.com/#!/mulesoft> <http://www.facebook.com/MuleSoft> ©2013 MuleSoft, Inc. All rights reserved. 77 Geary Street, Suite 400, San Francisco, CA 94108 If you no longer wish to receive these emails, go to the following link to unsubscribe: http://resources.mulesoft.com/UnsubscribePage.html?mkt_unsubscribe=1&mkt_to….

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Catching BXFE0001 when fetching binary
by Alexander von Bernuth 11 Jun '13

11 Jun '13

Hi folks, I'm a student working on my bachelor thesis. I use BaseX to read large XML files and forward them to a PostgreSQL database. Additionally I want to fetch images via URI and add them to the database-records. While fetching these images, I have to test three different file extensions for each image, as my source does not use one single image format (but jpg, png and gif). First I tried checking with fn:doc-available($uri) weather that certain URI is available, but this obviously only works for XML-documents. Then I wanted to catch the err:BXFE0001 that is thrown by fetch:binary($uri), but this does not work, either; the error-message is displayed and the script stops. > declare variable $baseuri := 'http://www.bricklink.com/ML/'; > declare variable $itemid := 'sw008'; > > try { > fetch:binary($baseuri || $itemid || '.png') > } > catch err:BXFE0001 { > try { > fetch:binary($baseuri || $itemid || '.gif') > } > catch err:BXFE0001 { > try { > fetch:binary($baseuri || $itemid || '.jpg') > } > catch err:BXFE0001 { > 0 > } > } > } In this example, only the .jpg-image exists. But all I get is > [BXFE0001] Resource "http://www.bricklink.com/ML/sw008.png" not found. > Information: > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> > <HTML><HEAD><TITLE>The page cannot be found</TITLE> … and so on I would be very glad if you could help me with this, either by pointing out my coding-error or by showing me another, better solution for doing this. Thank you and have a nice day, Alex PS: My sources on Try/Catch and fetching -- | Alexander von Bernuth | alexander.von-bernuth(a)student.uni-tuebingen.de

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baseX-core vs baseX-api
by David Dobbs 10 Jun '13

10 Jun '13

So, I have a couple of (hopefully simple) questions about the Java APIs provided by BaseX. Based on the comments in the examples, it looks like the function calls in the RunQueries.java example (https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/bas…) are strictly local calls that operate directly on local XML documents - there's no BaseX server involved, no client communication, no files created in org.basex.path, etc. Is that correct? What's the difference between the queries in RunQueries.java and QueryCollection.java? My guess from skimming the documentation is that, per above, RunQueries just uses BaseX's XQuery API, without taking advantage of BaseX's indexing, etc capabilities, whereas QueryCollection creates a (local) BaseX server, indexes the document, and then its queries would be accelerated using those indexes. Is this also correct? Thanks, -David

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(x)query, db lookup, and update in one step
by buzz chopra 08 Jun '13

08 Jun '13

Hello All, I'm relatively new to basex and xquery - but am using basex as a large report repository. I'd like to try and perform the following xquery - but with some intermediate steps: xquery for $rep in collection('coll')/Report let $attr0 := $rep/@attr0 return (replace value of node $rep/@attr1 with 'zzz') The actual value represented by 'zzz' above must be based on a separate (physical) database lookup for each attribute value $attr0 in the collection ( i.e. the values of attr1 is a (non-trivial lookup) function of attr0. Is this a scenario in which multiple queries would have to be made based on the number of documents in the collection ? Perhaps there is some slick way of including a call out to some method to such that the 'zzz' above is replaced with something like: JavaModule.doLookup($attr0) ? I'm executing xquery from a jruby application so either the ruby or the java client can be used (perhaps that is somewhat irrelevant). Thanks in advance for any suggestions, Buzz

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Java binding for Enums?
by Andy Bunce 07 Jun '13

07 Jun '13

Hi, Is there a way to access Java Enums via the Java bindings. I am trying to implement something like [1] without writing any Java. I have: declare namespace File="java:java.io.File"; declare namespace ImageIO="java:javax.imageio.ImageIO"; declare namespace Scalr="java:org.imgscalr.Scalr"; declare namespace Mode="java:org.imgscalr.Scalr.Mode"; let $src:=File:new("C:\tmp\pic.jpg") let $bsrc:=ImageIO:read($src) let $small:=Scalr:resize($bsrc,*"??what here??"*,xs:integer(50)) let $dest:=File:new("C:\tmp\small.jpg") return ImageIO:write($small,"jpg",$dest) But I cant see a way to supply the Enum Scalr.Method required by resize.[2] The tempting $Mode:AUTOMATIC does not work. /Andy [1] http://programming.mvergel.com/2013/01/resize-images-using-java.html#.UbHQw… [2] http://www.jarvana.com/jarvana/view/org/imgscalr/imgscalr-lib/4.2/imgscalr-…

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Comments after XML declaration cause XQQueryException
by Dustin Schultz 06 Jun '13

06 Jun '13

Hi, I'm noticing an issue where an XQQueryException is thrown if there are comments after XML declaration. I noticed it since license headers often go in this location (e.g. Apache License 2.0) Here is an example program that demonstrates the issue https://gist.github.com/dustinschultz/5718281 I believe the bug resides within the xqj-basex code but I have no idea where post bug reports and the source doesn't seem to be available. (Is it possible to get the source?) Thanks, Dustin

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External variable of type document-node in GUI
by Dustin Schultz 05 Jun '13

05 Jun '13

Hi, I can't seem to figure out how to bind an external variable as a document. I've searched all of the docs and am at a bit of loss. Is the following possible? possible? I've tried the following: http://pastebin.com/sbekQZNP With the following XQuery: http://pastebin.com/W8ZcMxJ9 But it always results in the error 'Invalid cast from xs:untypedAtomic to document-node()' - how does one tell it to be an document-node and not an xs:untypedAtomic. I've also tried setting it to doc('path/to/xml') with no luck Thanks, Dustin

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server time out
by Cerstin Elisabeth Mahlow 05 Jun '13

05 Jun '13

Hi, I run several web applications using various CGI scripts to read and update BaseX databases via various XQUERIES. I use the "basexserver -S" command to start the server on a CentOS Server. Maybe this is not the very best idea. I already split the data into various databases to avoid concurrent reading and writing. And I have a simple cron job running, that tests whether the BaseX server is still running and restarts it if it isn't running any more. However, my users get (or rather create) a time out from time to time. If the basex server then shut's down, the cron job would restart it and everything is fine again. In the last weeks, however, I discovered that after such a time out the Basex server seems to still be running, but doesn't answer any xquery any more. So I have to kill the process by hand and restart it again. Could you recommend a better solution to ensure smooth running of the Basex server even it sometimes a time out occurs? Thanks in advance and best regards Cerstin -- Dr. phil. Cerstin Mahlow Universität Basel Departement Sprach- und Literaturwissenschaften Fachbereich Deutsche Sprach- und Literaturwissenschaft Nadelberg 4 4051 Basel Schweiz Tel: +41 61 267 07 65 Fax: +41 61 267 34 40 Mail: cerstin.mahlow(a)unibas.ch Web: http://www.oldphras.net

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