Hello,
I am new to GeoTools and I have a question about the use of the gml:Envelope
tag. I have a project where I am going to have to take in xml documents that
will include OGC Filter statements. I downloaded a source copy of GeoTools
version 2.5.1 and started to look at the code. I wanted to see how the xml
version of the filter was handled in GeoTools, after some looking I found the
test class
modules/library/xml/src/test/java/org/geotools/xml/ogc/XMLEncoderTest.java.
This test class apparently takes in filter statements in xml and tries to parse
them into an org.opengis.filter.Filter object. I ran the JUnit test and of
course everything passed. I then decided that I wanted to try some filter
statements other than the ones used in the test. So I went to the file
modules/library/xml/src/test/resources/org/geotools/xml/ogc/test-data/test3b.xml.
This is one of the xml files that gets read in and parsed from xml to the
Filter object, I decided to change it into a different filter statement to see
how the filter object would look when using a gml:Envelope tag. I changed this
xml file to the following:
<Filter xmlns:gml="http://www.opengis.net/gml";>
<BBOX>
<PropertyName>Geometry</PropertyName>
<gml:Envelope>
<gml:lowerCorner>0
0</gml:lowerCorner>
<gml:upperCorner>10
10</gml:upperCorner>
</gml:Envelope>
</BBOX>
</Filter>
I then ran the JUnit test again. The test that uses the file test3b.xml does
not make any assertion statements to check and see what the outcome of the
Filter is, so I thought that my test would still pass. Instead I got the
following error while parsing the xml into the Filter object:
java.lang.NullPointerException
at
org.geotools.filter.FilterFactoryImpl.bbox(FilterFactoryImpl.java:261)
at
org.geotools.filter.FilterDOMParser.parseFilter(FilterDOMParser.java:453)
at
org.geotools.xml.ogc.XMLEncoderTest.parseDocument(XMLEncoderTest.java:238)
at
org.geotools.xml.ogc.XMLEncoderTest.test3b(XMLEncoderTest.java:139)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:81)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
I tried to debug the error and found that in the method
org.geotools.filterFilterDOMParser.parseFilter the code cannot parse the
gml:Envelope tag to determine what the values for the bounding box are.
Does GeoTools not support all of the gml language such as gml:Envelope tags, or
is my filter statement written incorrectly for using the gml:Envelope tag, or
is it that the class
modules/library/xml/src/test/java/org/geotools/xml/ogc/XMLEncoderTest.java is
not the correct JUnit class to handle parsing xml messages with gml:Envelope
tags to Filter objects, or is there something else I am missing? Thank you.
Brett
------------------------------------------------------------------------------
Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
easily build your RIAs with Flex Builder, the Eclipse(TM)based development
software that enables intelligent coding and step-through debugging.
Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
_______________________________________________
Geotools-gt2-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
