Hm, doesn’t look too self-contained (e.g., I can’t find
GraphContainment anywhere). For testing purposes, it may be easier to
build a simple BaseX package and do EXPath in a next step (see [1] for
more details).

Thanks,
Christian

[1] http://docs.basex.org/wiki/Repository
___________________________

On Fri, Feb 1, 2013 at 6:22 PM, Lansing, Jeff J CIV
SPAWARSYSCEN-PACIFIC, 56250 <jeff.lansing@navy.mil> wrote:
> Yes, of course:
>
> package cnde.module;
> import org.basex.core.Context;
> import org.basex.core.cmd.Add;
> import org.basex.core.cmd.CreateDB;
> import org.basex.core.cmd.DropDB;
> import org.basex.core.cmd.XQuery;
> import org.junit.Test;
> public class DbXmlTest {
>
>  @Test
>  public void test() {
>   try {
>    Context context = new Context();
> //   String result1 = new
> XQuery("repo:install('C:\\Users\\jlansing\\workspaceTEST\\dbxml-module\\dbxml-module-1.0.0.xar')").execute(context);
> //   System.out.println(result1);
>
>    new CreateDB("test").execute(context);
>    new Add("12345", "<doc><guid>12345</guid></doc>").execute(context);
>    String result = new XQuery("import module namespace
> dbxml='http://www.sleepycat.com/2002/dbxml';
> ((collection('test'))[1])/dbxml:metadata('dbxml:name')").execute(context);
>    String result2 = new
> XQuery("((collection('test'))[1])/document-uri()").execute(context);
>    System.out.println(result + " " +  result2);
>    new DropDB("test").execute(context);
>
>    context.close();
>   } catch(Exception e) {
>    e.printStackTrace();
>   }
>  }
> }
>
>
>
> ________________________________
> From: Christian Grün
> Sent: Fri 2/1/2013 9:15 AM
>
> To: Lansing, Jeff J CIV SPAWARSYSCEN-PACIFIC, 56250
> Cc: basex-talk@mailman.uni-konstanz.de
> Subject: Re: [basex-talk] Java User Function and Context Awareness
>
> What’s the query you are trying to run?
> ___________________________
>
> On Fri, Feb 1, 2013 at 6:07 PM, Lansing, Jeff J CIV
> SPAWARSYSCEN-PACIFIC, 56250 <jeff.lansing@navy.mil> wrote:
>> Java Source:
>> package cnde.module;
>> import org.basex.query.QueryException;
>> import org.basex.query.QueryModule;
>> import org.basex.query.iter.Iter;
>> import org.basex.query.value.Value;
>> import org.basex.query.value.item.Item;
>> import org.basex.query.value.item.Uri;
>> import org.basex.query.value.node.ANode;
>> import org.basex.query.value.type.NodeType;
>> public class DbXml extends QueryModule {
>>
>>  @Requires(Permission.NONE)
>>  @ContextDependent
>>  @FocusDependent
>>  public String metadata(String qname) {
>>   try {
>>    Value val = context.value;
>>    if(val == null) {
>>     return null;
>>    }
>>    Item it = null;
>>    if(val.isItem()) {
>>     it = (Item)val;
>>    } else {
>>     throw new QueryException(val + " not an item");
>>    }
>>    if(!(it instanceof ANode)) throw new QueryException(it + " not a
>> node");
>>    ANode node = (ANode)it;
>>    if(node.type != NodeType.DOC) return "node is not a document node";
>>          final byte[] uri = node.baseURI();
>>          String s = uri.length == 0 ? null : Uri.uri(uri,
>> false).toString();
>>          return s == null? "no uri for node" : s.replace("/",
>> "/hdl:okwffu/");
>>   } catch (QueryException e) {
>>    System.err.println(e);
>>    return e.getMessage();
>>   }
>>  }
>> }
>>
>> wrapper.xq:
>> module namespace dbxml='http://www.sleepycat.com/2002/dbxml';
>> declare namespace p="java:cnde.module.DbXml";
>> declare function dbxml:metadata($key as xs:string) as xs:string* {
>> let $meta := p:new()
>> return p:metadata($meta, $key)
>> };
>>
>> basex.xml:
>> <package xmlns="http://www.basex.org/modules/pkg">
>>   <jar>containment.jar</jar>
>>   <class>cnde.service.operator.GraphContainment</class>
>> </package>
>>
>> expath-pkg.xml:
>> <package xmlns="http://expath.org/ns/pkg"
>> name="http://www.sleepycat.com/2002/dbxml" abbrev="dbxml" version="1.0.0"
>> spec="1.0">
>>   <title>dbxml metadata</title>
>>   <dependency processor="basex"/>
>>   <xquery>
>>     <namespace>http://www.sleepycat.com/2002/dbxml</namespace>
>>     <file>wrapper.xq</file>
>>   </xquery>
>> </package>
>>
>> ________________________________
>> From: Christian Grün
>> Sent: Fri 2/1/2013 8:39 AM
>> To: Lansing, Jeff J CIV SPAWARSYSCEN-PACIFIC, 56250
>> Cc: basex-talk@mailman.uni-konstanz.de
>> Subject: Re: [basex-talk] Java User Function and Context Awareness
>>
>> Dear Jeff,
>>
>> Afair, UserFunc should never be evaluated when calling a Java
>> function. Do you have an sscce for demonstrating your use case?
>>
>> By extending the QueryModule class, you are getting access to all
>> internal query process information, and the current context is one of
>> them. As you already guessed, it can be retrieved via "context.value".
>>
>> Another alternative is to pass on the current context as argument..
>>
>>    Q{java:.....}func(.)
>>
>> Best,
>> Christian
>> ___________________________
>>
>> On Wed, Jan 30, 2013 at 6:40 PM, Lansing, Jeff J CIV
>> SPAWARSYSCEN-PACIFIC, 56250 <jeff.lansing@navy.mil> wrote:
>>>  It seems that there is no way for a Java user function installed in the
>>> Repository to get access to the current context node.
>>> Yes the context is available because of extending abstract QueryModule,
>>> but
>>> it seems the value of the current context node has been wiped out by the
>>> call from UserFunc.value() [at UserFunc:line 170] before it gets to the
>>> actual user function [during line 175].
>>> Is there some way for a user function to recover that value, or is this
>>> just
>>> a limitation of the user function mechanism?
>>> Thanks.
>>>
>>> _______________________________________________
>>> BaseX-Talk mailing list
>>> BaseX-Talk@mailman.uni-konstanz.de
>>> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk
>>>