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Posted to user@commons.apache.org by Dmitriy Kuznetsov <he...@yandex.ru> on 2008/09/01 16:43:28 UTC
Commons betwixt 0.8 - reading Map from XML
Hi. I am trying to load a map of <String, Object> from XML back to java using
betwixt - with no success.
I've exported a Hashtable of <String, Object> to XML using Betwixt 0.8. The
XML i've got is:
<?xml version="1.0" encoding="UTF-8" ?>
<metadata>
<map>
<empty>true</empty>
<entry>
<key>gabbaGabbaHey</key>
<value>md-id-2</value>
</entry>
<entry>
<key>Entry1</key>
<value>123</value>
</entry>
<entry>
<key>halooppoRoste</key>
<value>-3.76</value>
</entry>
</map>
</metadata>
After that, i am trying to load the XML back by the following code:
BeanReader beanReader = new BeanReader();
beanReader.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
beanReader.getBindingConfiguration().setMapIDs(false);
try {
beanReader.registerBeanClass("map", Hashtable.class);
beanReader.registerBeanClass("entry/value", String.class);
Object tmp;
File srcFile = new File("metadata.xml");
tmp = instance.beanReader.parse(srcFile);
} catch (Exception ex) {
logger.log(Level.SEVERE, "Failed to read metadata.", ex);
return null;
}
I played with beanReader.registerBeanClass - tried to set "metadata/map" and
"metadata/map/entry/value" as first parameter, disable registerBeanClass
commands, remove <metadata> tags from XML, but the only results i've got are
null in tmp variable, or EmptyStackException
Sep 1, 2008 5:39:52 PM org.apache.commons.digester.Digester endElement
SEVERE: End event threw exception
java.util.EmptyStackException
at org.apache.commons.collections.ArrayStack.peek(ArrayStack.java:94)
at
org.apache.commons.betwixt.io.read.ReadContext.getBean(ReadContext.java:351)
at
org.apache.commons.betwixt.expression.CollectionUpdater.update(CollectionUpdater.java:47)
at
org.apache.commons.betwixt.io.read.BeanBindAction.update(BeanBindAction.java:171)
at
org.apache.commons.betwixt.io.read.BeanBindAction.end(BeanBindAction.java:158)
at
org.apache.commons.betwixt.io.BeanRuleSet$ActionMappingRule.end(BeanRuleSet.java:316)
at org.apache.commons.digester.Digester.endElement(Digester.java:1222)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1728)
at
com.aleri.lms.ui.beans.XMLMetadataProvider.loadMetadata(XMLMetadataProvider.java:83)
at
com.aleri.lms.ui.beans.XMLMetadataProvider.main(XMLMetadataProvider.java:74)
java.util.EmptyStackException
at
org.apache.commons.digester.Digester.createSAXException(Digester.java:3181)
at
org.apache.commons.digester.Digester.createSAXException(Digester.java:3207)
at org.apache.commons.digester.Digester.endElement(Digester.java:1225)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1728)
at
com.aleri.lms.ui.beans.XMLMetadataProvider.loadMetadata(XMLMetadataProvider.java:83)
at
com.aleri.lms.ui.beans.XMLMetadataProvider.main(XMLMetadataProvider.java:74)
Well, at the end of all i need an instance of Map<String, Object>. If i have
to anjust my XML file to accomplish this, it's ok. If there is a solution,
that allows to keep information about order of entries in XML file, i would
better implement it, instead of plain map.
Could you please explain me, how to do it? At least, how to load Map from
XML?
I understand, that my question may be lame. But i am trying variants,
tracing code and looking for answer for about three days, and found nothing
that could help. I believe it would be perfect to have a sample or entry in
FAQ with working code that loads Map from XML.
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Re: Commons betwixt 0.8 - reading Map from XML
Posted by Simone Tripodi <si...@gmail.com>.
Hi Dimitry,
my pleasure :)
Best regards,
Simone
2008/9/5 Dmitriy Kuznetsov <he...@yandex.ru>:
>
>
> Simone Tripodi wrote:
>>
>> Hi Dmitriy,
>> you don't you use just the commons-digester rules to map the xml to your
>> map?
>> It's also a betwixt dependency library, and maybe it could be easier.
>> Best regards,
>> Simone
>>
> Well, i've made some changes since first time. The XML now looks like
> following:
>
> <metadata>
> <group name="...">
> <entry name="...">
> <header>...</header>
> <width>...</width>
> </entry>
> <entry name="...">
> <hideable>...</hideable>
> <tooltip>...</tooltip>
> </entry>
> </group>
> <group name="...">
> <entry name="...">
> <align>...</align>
> <width>...</width>
> </entry>
> </group>
> </metadata>
>
> And as Simone suggested, i've used commons Digester instead of Betwixt:
>
> Digester digester = new Digester();
>
> digester.setValidating(false);
>
> digester.addObjectCreate("metadata", Hashtable.class);
>
> digester.addObjectCreate("metadata/group", ListOrderedMap.class);
>
> Rule r = new CallMethodRule(1, "put", 2);
> digester.addRule("metadata/group", r);
> digester.addCallParam("metadata/group", 0, "name");
> digester.addCallParam("metadata/group", 1, true);
>
> // MetadataEntry is a simple bean that holds values of <entry/> section
> digester.addObjectCreate("metadata/group/entry", MetadataEntry.class);
>
> r = new SetNestedPropertiesRule();
> digester.addRule("metadata/group/entry", r);
>
> r = new CallMethodRule(1, "put", 2);
> digester.addRule("metadata/group/entry", r);
> digester.addCallParam("metadata/group/entry", 0, "name");
> digester.addCallParam("metadata/group/entry", 1, true);
>
> // a little later
>
> InputStream is =
> servletContext.getResourceAsStream("WEB-INF/classes/metadata.xml");
> Object result = digester.parse(is);
>
> And it works. The resulting data structure is: Map<String, Map<String,
> MetadataEntry>>
> Simone, thanks! =)
> --
> View this message in context: http://www.nabble.com/Commons-betwixt-0.8---reading-Map-from-XML-tp19255879p19336473.html
> Sent from the Commons - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
--
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Re: Commons betwixt 0.8 - reading Map from XML
Posted by Dmitriy Kuznetsov <he...@yandex.ru>.
Simone Tripodi wrote:
>
> Hi Dmitriy,
> you don't you use just the commons-digester rules to map the xml to your
> map?
> It's also a betwixt dependency library, and maybe it could be easier.
> Best regards,
> Simone
>
Well, i've made some changes since first time. The XML now looks like
following:
<metadata>
<group name="...">
<entry name="...">
<header>...</header>
<width>...</width>
</entry>
<entry name="...">
<hideable>...</hideable>
<tooltip>...</tooltip>
</entry>
</group>
<group name="...">
<entry name="...">
<align>...</align>
<width>...</width>
</entry>
</group>
</metadata>
And as Simone suggested, i've used commons Digester instead of Betwixt:
Digester digester = new Digester();
digester.setValidating(false);
digester.addObjectCreate("metadata", Hashtable.class);
digester.addObjectCreate("metadata/group", ListOrderedMap.class);
Rule r = new CallMethodRule(1, "put", 2);
digester.addRule("metadata/group", r);
digester.addCallParam("metadata/group", 0, "name");
digester.addCallParam("metadata/group", 1, true);
// MetadataEntry is a simple bean that holds values of <entry/> section
digester.addObjectCreate("metadata/group/entry", MetadataEntry.class);
r = new SetNestedPropertiesRule();
digester.addRule("metadata/group/entry", r);
r = new CallMethodRule(1, "put", 2);
digester.addRule("metadata/group/entry", r);
digester.addCallParam("metadata/group/entry", 0, "name");
digester.addCallParam("metadata/group/entry", 1, true);
// a little later
InputStream is =
servletContext.getResourceAsStream("WEB-INF/classes/metadata.xml");
Object result = digester.parse(is);
And it works. The resulting data structure is: Map<String, Map<String,
MetadataEntry>>
Simone, thanks! =)
--
View this message in context: http://www.nabble.com/Commons-betwixt-0.8---reading-Map-from-XML-tp19255879p19336473.html
Sent from the Commons - User mailing list archive at Nabble.com.
---------------------------------------------------------------------
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For additional commands, e-mail: user-help@commons.apache.org
Re: Commons betwixt 0.8 - reading Map from XML
Posted by Simone Tripodi <si...@gmail.com>.
Hi Dmitriy,
you don't you use just the commons-digester rules to map the xml to your map?
It's also a betwixt dependency library, and maybe it could be easier.
Best regards,
Simone
2008/9/1 Dmitriy Kuznetsov <he...@yandex.ru>:
>
> Hi. I am trying to load a map of <String, Object> from XML back to java using
> betwixt - with no success.
> I've exported a Hashtable of <String, Object> to XML using Betwixt 0.8. The
> XML i've got is:
>
> <?xml version="1.0" encoding="UTF-8" ?>
> <metadata>
> <map>
> <empty>true</empty>
> <entry>
> <key>gabbaGabbaHey</key>
> <value>md-id-2</value>
> </entry>
> <entry>
> <key>Entry1</key>
> <value>123</value>
> </entry>
> <entry>
> <key>halooppoRoste</key>
> <value>-3.76</value>
> </entry>
> </map>
> </metadata>
>
> After that, i am trying to load the XML back by the following code:
>
> BeanReader beanReader = new BeanReader();
>
>
> beanReader.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
> beanReader.getBindingConfiguration().setMapIDs(false);
>
> try {
> beanReader.registerBeanClass("map", Hashtable.class);
> beanReader.registerBeanClass("entry/value", String.class);
>
> Object tmp;
>
> File srcFile = new File("metadata.xml");
> tmp = instance.beanReader.parse(srcFile);
>
> } catch (Exception ex) {
> logger.log(Level.SEVERE, "Failed to read metadata.", ex);
> return null;
> }
>
> I played with beanReader.registerBeanClass - tried to set "metadata/map" and
> "metadata/map/entry/value" as first parameter, disable registerBeanClass
> commands, remove <metadata> tags from XML, but the only results i've got are
> null in tmp variable, or EmptyStackException
>
> Sep 1, 2008 5:39:52 PM org.apache.commons.digester.Digester endElement
> SEVERE: End event threw exception
> java.util.EmptyStackException
> at org.apache.commons.collections.ArrayStack.peek(ArrayStack.java:94)
> at
> org.apache.commons.betwixt.io.read.ReadContext.getBean(ReadContext.java:351)
> at
> org.apache.commons.betwixt.expression.CollectionUpdater.update(CollectionUpdater.java:47)
> at
> org.apache.commons.betwixt.io.read.BeanBindAction.update(BeanBindAction.java:171)
> at
> org.apache.commons.betwixt.io.read.BeanBindAction.end(BeanBindAction.java:158)
> at
> org.apache.commons.betwixt.io.BeanRuleSet$ActionMappingRule.end(BeanRuleSet.java:316)
> at org.apache.commons.digester.Digester.endElement(Digester.java:1222)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
> Source)
> at org.apache.commons.digester.Digester.parse(Digester.java:1728)
> at
> com.aleri.lms.ui.beans.XMLMetadataProvider.loadMetadata(XMLMetadataProvider.java:83)
> at
> com.aleri.lms.ui.beans.XMLMetadataProvider.main(XMLMetadataProvider.java:74)
> java.util.EmptyStackException
> at
> org.apache.commons.digester.Digester.createSAXException(Digester.java:3181)
> at
> org.apache.commons.digester.Digester.createSAXException(Digester.java:3207)
> at org.apache.commons.digester.Digester.endElement(Digester.java:1225)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
> Source)
> at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
> Source)
> at org.apache.commons.digester.Digester.parse(Digester.java:1728)
> at
> com.aleri.lms.ui.beans.XMLMetadataProvider.loadMetadata(XMLMetadataProvider.java:83)
> at
> com.aleri.lms.ui.beans.XMLMetadataProvider.main(XMLMetadataProvider.java:74)
>
> Well, at the end of all i need an instance of Map<String, Object>. If i have
> to anjust my XML file to accomplish this, it's ok. If there is a solution,
> that allows to keep information about order of entries in XML file, i would
> better implement it, instead of plain map.
> Could you please explain me, how to do it? At least, how to load Map from
> XML?
>
> I understand, that my question may be lame. But i am trying variants,
> tracing code and looking for answer for about three days, and found nothing
> that could help. I believe it would be perfect to have a sample or entry in
> FAQ with working code that loads Map from XML.
> --
> View this message in context: http://www.nabble.com/Commons-betwixt-0.8---reading-Map-from-XML-tp19255879p19255879.html
> Sent from the Commons - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
--
My LinkedIn profile: http://www.linkedin.com/in/simonetripodi
My GoogleCode profile: http://code.google.com/u/simone.tripodi/
My Sourceforge: https://sourceforge.net/users/stripodi
My Picasa: http://picasaweb.google.com/simone.tripodi/
My Tube: http://www.youtube.com/user/stripodi
My Del.icio.us: http://del.icio.us/simone.tripodi
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