Re: [emf-dev] deserializing partial xml document into eobject

[Ed Merks <merks@xxxxxxxxxx>]

Donald,

Please use the newsgroup for questions.
  

I don't think you should be using OPTION_XML_MAP;
just the options used by the XML processor should be sufficient.  Probably
SummarySegment corresponds to a local element declaration and so it won't
be recognized at the root of a document, which expects to match against
a global element declaration.  So if you defined a schema will null
namespace and with the same type as the SummarySegment local element declaration
then with that schema registered against the null namespace you should
be able to get this to work; use Mpeg7XMLProcessor.getExtendedMetaData().putPackage(null,
<the-package-for-the-summary-segment schema.>) to register that additional
package against the null namespace.


Ed Merks/Toronto/IBM@IBMCA
mailto: merks@xxxxxxxxxx
905-413-3265  (t/l 969)

Donald Averill <ave@xxxxxxxxxxxxxxxx>
Sent by: emf-dev-bounces@xxxxxxxxxxx

05/19/2006 05:05 PM

Please respond to
Eclipse Modelling Framework

To	emf-dev@xxxxxxxxxxx
cc
Subject	[emf-dev] deserializing partial xml document into eobject

Hi,
I successfully created an EMF model from a schema and am able to load my
xml files into the model.  What I want to do is to deserialize part
of 
the document into its corresponding generated EObject.  The schema
I 
used to generate the model is the Mpeg7 schema 
(http://m7itb.nist.gov/M7Validation.html).  For example, I can load
the 
following file no problem:

<?xml version="1.0" encoding="iso-8859-1"?>
<Mpeg7 xmlns="urn:mpeg:mpeg7:schema:2001" 
xmlns:mpeg7="urn:mpeg:mpeg7:schema:2001" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="urn:mpeg:mpeg7:schema:2001 Mpeg7-2001.xsd">
<Description xsi:type="SummaryDescriptionType">
<Summarization>
<Header xsi:type="DescriptionMetadataType">
<LastUpdate>2006-03-28</LastUpdate>
<Comment><FreeTextAnnotation>Summarization of a Dive based
on Event log 
and associated frame grabs</FreeTextAnnotation></Comment>
<Creator>
<Role href="">
<Agent xsi:type="PersonType">
<Name><GivenName>First</GivenName><FamilyName>Last</FamilyName></Name>
<Affiliation><Organization><Name>Organization 
Name</Name></Organization></Affiliation>
</Agent>
</Creator>
<Instrument>
<Tool><Name>XSL Transform</Name></Tool></Instrument>
</Header>
<Summary hierarchy="independent" components="keyFrames
keyThemes" 
xsi:type="HierarchicalSummaryType">
<SourceID>J2-171</SourceID>
<SummaryThemeList>
<SummaryTheme id="EVT">Events manually annotated by 
operators.</SummaryTheme>
<SummaryTheme id="ASNAP">Events automatically registered
by software.  
No textual annotation</SummaryTheme>
</SummaryThemeList>
<SummarySegmentGroup level="0" themeIDs="EVT ASNAP"
id="summary-J2-171">
<Name>Events for Dive J2-171</Name>
<Caption>Events captured by SD cameras</Caption>
     <SummarySegment themeIDs="EVT">
<Header xsi:type="DescriptionMetadataType">
<CreationLocation>
<GeographicPosition>
<Point altitude="-1.328" latitude="49.44816468"
longitude="-128.89364908"/>
</GeographicPosition>
</CreationLocation>
</Header>
<Name>Light elevator in water (Vvan)</Name>
<KeyFrame>
<MediaUri>SubSea1.20050913_174051.jpg</MediaUri>
<MediaTimePoint>2005-09-13T17:40:51</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea2.20050913_174051.jpg</MediaUri>
<MediaTimePoint>2005-09-13T17:40:51</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea3.20050913_174051.jpg</MediaUri>
<MediaTimePoint>2005-09-13T17:40:51</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea4.20050913_174051.jpg</MediaUri>
<MediaTimePoint>2005-09-13T17:40:51</MediaTimePoint>
</KeyFrame>
</SummarySegment>
<SummarySegment>
.......
</SummarySegment>
</SummarySegmentGroup>
</Summary>
</Summarization>
</Description>
</Mpeg7>

There are actually several thousand SummarySegment's.  When I load
the 
whole file, everything works fine.  But what I really want to do is
to 
take one of the SummarySegments and deserialize it into its 
corresponding EObject.  In my case, it's called SummarySegmentType.
 I 
want to do this because I retrieve a select number of the 
SummarySegments from an xml database (based on search) and I don't want
to have to return the whole document to get just the part I'm interested
in.  Basically, I want to have a SummarySegmentType object that was
been 
created from something like:

<SummarySegment xmlns="urn:mpeg:mpeg7:schema:2001" themeIDs="ASNAP">
<Header xsi:type="DescriptionMetadataType" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<CreationLocation>
<GeographicPosition>
<Point altitude="-2198.128" latitude="47.95012874"
longitude="-129.09741143"/>
</GeographicPosition>
</CreationLocation>
</Header>
<KeyFrame>
<MediaUri>SubSea1.20050914_025933.jpg</MediaUri>
<MediaTimePoint>2005-09-14T02:59:33</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea2.20050914_025933.jpg</MediaUri>
<MediaTimePoint>2005-09-14T02:59:33</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea3.20050914_025933.jpg</MediaUri>
<MediaTimePoint>2005-09-14T02:59:33</MediaTimePoint>
</KeyFrame>
<KeyFrame>
<MediaUri>SubSea4.20050914_025933.jpg</MediaUri>
<MediaTimePoint>2005-09-14T02:59:33</MediaTimePoint>
</KeyFrame>
</SummarySegment>

I have tried:

            Mpeg7XMLProcessor processor =
new Mpeg7XMLProcessor();
            Map options = new HashMap();
            XMLResource.XMLMap xmlMap = new
XMLMapImpl();
            // xmlMap.setNoNamespacePackage(Mpeg7Package.eINSTANCE);
            options.put(XMLResource.OPTION_XML_MAP,
xmlMap);
            processor.load(new FileInputStream(new
File("C:/test.xml")), 
options);
           
and

            Mpeg7ResourceImpl resource =
new 
Mpeg7ResourceImpl(URI.createFileURI(f.getAbsolutePath()));
            XMLResource.XMLMap xmlMap = new
XMLMapImpl();
            xmlMap.setNoNamespacePackage(Mpeg7Package.eINSTANCE);
            Map options = new HashMap();
            options.put(XMLResource.OPTION_XML_MAP,
xmlMap);
            
options.put(XMLResource.OPTION_EXTENDED_META_DATA,ExtendedMetaData.INSTANCE);
            resource.load(options);

Both produce the following error:

org.eclipse.emf.ecore.resource.Resource$IOWrappedException: Class 
'SummarySegment' not found. (file:/C:/test.xml, 1, 112)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.handleErrors(XMLLoadImpl.java:80)
    at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:189)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:179)
    at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1089)
    at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:895)
    at edu.washington.cev.jasonii.Test.test2(Test.java:101)
    at edu.washington.cev.jasonii.Test.main(Test.java:33)
Caused by: org.eclipse.emf.ecore.xmi.ClassNotFoundException: Class 
'SummarySegment' not found. (file:/C:/test.xml, 1, 112)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.validateCreateObjectFromFactory(XMLHandler.java:1977)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.handleFeature(XMLHandler.java:1618)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createDocumentRoot(XMLHandler.java:1224)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectByType(XMLHandler.java:1152)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createTopObject(XMLHandler.java:1234)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.processElement(XMLHandler.java:872)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:854)
    at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:626)
    at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
    at 
com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:798)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:878)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(XMLDocumentScannerImpl.java:1157)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1794)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
    at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
    at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
    at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:375)
    at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:179)
    ... 5 more

Any help is appreciated.


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