[udig-devel] OSMM GML loading - null pointer
Vince Darley
vince.darley at eurobios.com
Wed Sep 12 03:18:01 PDT 2007
Thanks all for your help on this. Unfortunately
we haven't managed to resolve this problem, so we
are going to have to not use Geotools for this
part of our work. It's a shame something so
fundamental as parsing GML is so complex and error-ridden!
cheers,
Vince.
At 19:08 11/09/2007, Vince Darley wrote:
>Hmm, I've removed all vestiges of Eclipse by
>running this as a junit test rather than eclipse
>junit-plugin test. This removes the bundle
>resource stuff but now hits a null pointer:
>
>Thread [main] (Suspended (exception NullPointerException))
> Schemas.getImports(XSDSchema) line: 819
> ParserHandler.startElement(String,
> String, String, Attributes) line: 324
>
>SAXParser(AbstractSAXParser).startElement(QName,
>XMLAttributes, Augmentations) line: not available
> XMLNSDocumentScannerImpl.scanStartElement() line: not available
>
>XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook()
>line: not available
>
>XMLNSDocumentScannerImpl$NSContentDispatcher(XMLDocumentFragmentScannerImpl$FragmentContentDispatcher).dispatch(boolean)
>line: not available
>
>XMLNSDocumentScannerImpl(XMLDocumentFragmentScannerImpl).scanDocument(boolean)
>line: not available
>
>XIncludeAwareParserConfiguration(XML11Configuration).parse(boolean)
>line: not available
>
>XIncludeAwareParserConfiguration(XML11Configuration).parse(XMLInputSource)
>line: not available
> SAXParser(XMLParser).parse(XMLInputSource) line: not available
> SAXParser(AbstractSAXParser).parse(InputSource) line: not available
> Parser.parse(InputSource) line: 184
> Parser.parse(InputStream) line: 146
> OSmmSampleParsingTest.testFileReading() line: 84
>
>NativeMethodAccessorImpl.invoke0(Method, Object,
>Object[]) line: not available [native method]
> NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39
> DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25
> Method.invoke(Object, Object...) line: 597
> OSmmSampleParsingTest(TestCase).runTest() line: 154
> OSmmSampleParsingTest(TestCase).runBare() line: 127
> TestResult$1.protect() line: 106
> TestResult.runProtected(Test, Protectable) line: 124
> TestResult.run(TestCase) line: 109
> OSmmSampleParsingTest(TestCase).run(TestResult) line: 118
> TestSuite.runTest(Test, TestResult) line: 208
> TestSuite.run(TestResult) line: 203
> JUnit3TestReference.run(TestExecution) line: 128
> TestExecution.run(ITestReference[]) line: 38
> RemoteTestRunner.runTests(String[], String, TestExecution) line: 460
> RemoteTestRunner.runTests(TestExecution) line: 673
> RemoteTestRunner.run() line: 386
> RemoteTestRunner.main(String[]) line: 196
>
>Is that any easier?
>
>Vince.
>
>At 18:10 11/09/2007, Jesse Eichar wrote:
>>I don't know how the bundle resource stuff got in there it is the
>>URLs eclipse uses. you can normally resolve the URLs using the
>>FileLocator class...
>>
>>Jesse
>>
>>On Sep 11, 2007, at 9:57 AM, Vince Darley wrote:
>>
>>>If I manually edit two of the .xsd files to insert schemaLocations
>>>in 2 places each:
>>>
>>> <import namespace="http://www.opengis.net/gml"
>>>schemaLocation="gml.xsd"/>
>>> <import namespace="http://www.w3.org/1999/xlink"
>>>schemaLocation="xlink.xsd"/>
>>>
>>>then things get a bit further, but I then get an error:
>>>
>>>java.net.UnknownHostException: bundleresource
>>>
>>>due to an attempt to open an input stream on this URL:
>>>
>>>file://bundleresource://74/cache/www.w3.org/2001/datatypes.dtd
>>>
>>>any thoughts on that?
>>>
>>>Vince.
>>>
>>>...and I thought xml was supposed to make things easy.
>>>
>>>At 17:19 11/09/2007, Justin Deoliveira wrote:
>>>>Hi Guys,
>>>>
>>>>Sorry to jump in late. Seems like you are making progress. This
>>>>import
>>>>seems strange to me:
>>>>
>>>><import namespace="http://www.opengis.net/gml"/>
>>>>
>>>>Since it does not have any schemaLocation attribute? Which is most
>>>>likely the source of the null pointer exception. Since it is a
>>>>"well-known" namespace / schema to the parser, simply putting
>>>>schemaLocation="gml.xsd" should do the trick.
>>>>
>>>>-Justin
>>>>
>>>>Vince Darley wrote:
>>>> > At 11:05 11/09/2007, Gabriel Roldán wrote:
>>>> >> Configuration configuration = new
>>>> >> ApplicationSchemaConfiguration(namespace,
>>>> >> schemaLocation);
>>>> >> Parser parser = new Parser( configuration );
>>>> >
>>>> > Now that seems to work quite a lot better, except we hit null
>>>>pointer
>>>> > exceptions due to calls to 'resolveSchemaLocation':
>>>> >
>>>> > public String resolveSchemaLocation(XSDSchema schema, String
>>>>uri, String
>>>> > location) {
>>>> >
>>>> > where:
>>>> > uri "http://www.opengis.net/gml"
>>>> > location null
>>>> >
>>>> > It tries to look for a file in the directory that we supplied on
>>>> > construction, but with 'null' as a file name.
>>>> >
>>>> > This seems to be driven/triggered by lines like this:
>>>> >
>>>> > <import namespace="http://www.opengis.net/gml"/>
>>>> >
>>>> > in the schema being parsed.
>>>> >
>>>> > any idea how to avoid that problem?
>>>> >
>>>> > Vince.
>>>> >
>>>> >
>>>> > !DSPAM:4007,46e671d1174873362379201!
>>>> >
>>>>
>>>>
>>>>--
>>>>Justin Deoliveira
>>>>The Open Planning Project
>>>>http://topp.openplans.org
>>>>
>>>>
>>>>
>>>>--
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>>>>08/09/2007 13:24
>>>
>>>_______________________________________________
>>>User-friendly Desktop Internet GIS (uDig)
>>>http://udig.refractions.net
>>>http://lists.refractions.net/mailman/listinfo/udig-devel
>>
>>_______________________________________________
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>>http://udig.refractions.net
>>http://lists.refractions.net/mailman/listinfo/udig-devel
>>
>>
>>
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>
>_______________________________________________
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>http://udig.refractions.net
>http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
>
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