[basex-talk] Passing java objects as XQuery parameters using XQJ

1 Jul 2010

      Hi,

I am having trouble binding a java object to an XQuery external variable.

Here is my simple java class:

public class Provami {

    private int items;
    private String name;

    public Provami() {
    }

    public Provami(String name, int items) {
        this.items = items;
        this.name = name;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getItems() {
        return this.items;
    }

    public void setItems( int items) {
        this.items = items;
    }
}

and here is my XQuery sample

declare namespace provami = "java:Provami";
declare variable $bar as xs:anyAtomicType external;

let $foo := provami:new()
return element a {
    element i {provami:setName($foo, 'nome'), provami:getName($foo)},
    element i {provami:getName($bar)}
}

I have tried two approaches with XQJ:

1) to create an atomic type

groovy:000> otype =
conn.createAtomicType(XQItemType.XQBASETYPE_ANYATOMICTYPE, new
QName("java:Provami"),null)
groovy:000> ixpr.bindObject(new QName("bar"), new Provami("passato", 4), otype)
ERROR org.basex.api.xqj.BXQException:
No mapping known for 'Provami'.
        at org.basex.api.xqj.BXQAbstract.create (BXQAbstract.java:128)
        at org.basex.api.xqj.BXQDynamicContext.bindObject
(BXQDynamicContext.java:147)
        at groovysh_evaluate.run (groovysh_evaluate:13)
        ...

2) I have also tried to create an item

groovy:000> itm = conn.createItemFromObject(new Provami('roba',4), null)
ERROR org.basex.api.xqj.BXQException:
No mapping known for 'Provami'.
        at org.basex.api.xqj.BXQAbstract.create (BXQAbstract.java:128)
        at org.basex.api.xqj.BXQDataFactory.createItemFromObject
(BXQDataFactory.java:231)
        at org.basex.api.xqj.BXQDataFactory.createItemFromObject
(BXQDataFactory.java:39)
        at groovysh_evaluate.run (groovysh_evaluate:13)
        ...

Could you please advice on how I may successfully bind the parameter.

Thanks
Stefano

[basex-talk] Passing java objects as XQuery parameters using XQJ

Stefano Santoro