Passing java objects as XQuery parameters using XQJ

On Thu, Jul 1, 2010 at 11:53 PM, Stefano Santoro <stefano at santoro.org> wrote: > 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 mailing list > BaseX-Talk at mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >

On Fri, Jul 2, 2010 at 3:54 AM, Christian Grün <christian.gruen at gmail.com> wrote: > Dear Stefano, > > as there is no XQuery equivalent for Provami, it won't be possible to > bind a class instance to an XQuery variable – at least according to > the XQJ specs, as far as I can remember. If there should be other > implementations who offer this functionality, or if you think it > should indeed be possible, feel free to let me know how the class > instance is to be handled by XQuery. > > All the best, > Christian > > > > On Thu, Jul 1, 2010 at 11:53 PM, Stefano Santoro <stefano at santoro.org> wrote: >> 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 mailing list >> BaseX-Talk at mailman.uni-konstanz.de >> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >> >

On Fri, Jul 2, 2010 at 3:41 PM, Stefano Santoro <stefano at santoro.org> wrote: > Hi Christian, > > I am routing for Germany tomorrow. > > Michael Kay at Saxonica came up with this aproach (http://sn.im/ypvwa) > > XQDataSource ds = new SaxonXQDataSource(); > XQConnection conn = ds.getConnection(); > > XQPreparedExpression exp = conn.prepareExpression( > "declare namespace jt = > 'http://saxon.sf.net/java-type';\n" + > "declare namespace Locale = 'java:java.util.Locale';\n" + > "declare variable $locale as jt:java.util.Locale > external;\n" + > "Locale:getDisplayLanguage($locale)"); > > XQItemType localeType = conn.createAtomicType( > XQItemType.XQBASETYPE_ANYATOMICTYPE, > new QName("http://saxon.sf.net/java-type", > "java.util.Locale"), > null); > XQItem italianLocale = > conn.createItemFromObject(Locale.ITALIAN, localeType); > exp.bindItem(new QName("locale"), italianLocale); > XQResultSequence result = exp.executeQuery(); > while (result.next()) { > XQItem item = result.getItem(); > System.out.println("Locale: " + item.getItemAsString(null)); > } > > Maybe a variation of the same? > > Ciao > Stefano > > > > On Fri, Jul 2, 2010 at 3:54 AM, Christian Grün > <christian.gruen at gmail.com> wrote: >> Dear Stefano, >> >> as there is no XQuery equivalent for Provami, it won't be possible to >> bind a class instance to an XQuery variable – at least according to >> the XQJ specs, as far as I can remember. If there should be other >> implementations who offer this functionality, or if you think it >> should indeed be possible, feel free to let me know how the class >> instance is to be handled by XQuery. >> >> All the best, >> Christian >> >> >> >> On Thu, Jul 1, 2010 at 11:53 PM, Stefano Santoro <stefano at santoro.org> wrote: >>> 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 mailing list >>> BaseX-Talk at mailman.uni-konstanz.de >>> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >>> >> >