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Re: [Geotools-gt2-users] java.lang.RuntimeException: Unable to find function Length 2.7.RC2-bin
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From: Michael B. <mic...@gm...> - 2011-03-19 07:26:05
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Hi Alessandro,
I just tried your "old school" code in a plain vanilla java app with
the following jars attached:
gt-api
gt-data
gt-main
gt-shapefile
gt-opengis
All taken from the 2.7-RC2 distribution. The app runs without error on
my system (Java 1.6, OSX). The code I used is below. I'm guessing
that it's a classpath issue at your end, unless someone else is able
to replicate the problem.
Michael
package mxb.geotools.testapp;
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.FeatureSource;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
public class Foo {
private static final Logger logger = Logger.getLogger(Foo.class.getName());
public static void main(String[] args) throws Exception {
Foo foo = new Foo();
foo.runTest(new
File("/Users/michael/coding/geotools/data/refractions/bc_border.shp"));
}
private void runTest(File shpfile) throws Exception {
Map map = new HashMap();
map.put("url", shpfile.toURI().toURL());
DataStore store = DataStoreFinder.getDataStore(map);
String[] typeNames = store.getTypeNames();
String typeName = typeNames[0];
logger.info("typeName: " + typeName);
FeatureSource<SimpleFeatureType, SimpleFeature> featureSource
= store.getFeatureSource(typeName);
SimpleFeatureType ft = featureSource.getSchema();
Map<String, Integer> attributemap = new HashMap<String, Integer>();
List<AttributeDescriptor> attrdescripts = ft.getAttributeDescriptors();
for (int x = 0; x < attrdescripts.size(); x++) {
attributemap.put(attrdescripts.get(x).getLocalName(), x);
}
FeatureCollection<SimpleFeatureType, SimpleFeature> collection
= featureSource.getFeatures();
FeatureIterator<SimpleFeature> iterator = collection.features();
int n = 0;
try {
// dumb code just for testing :)
while (iterator.hasNext()) {
iterator.next();
n++ ;
}
} finally {
iterator.close();
}
System.out.println("count = " + n);
}
}
On 19 March 2011 09:31, Alessandro Ferrucci
<ale...@gm...> wrote:
> Testing pre-built 2.7.RC2 binaries to compile simple shapefile reading
> program.
>
> Using 2.7.RC2 I get
>
> Exception in thread "Thread-5" Exception in thread "Thread-2"
> java.lang.RuntimeException: Unable to find function Length
> at
> org.geotools.filter.FunctionFinder.findFunction(FunctionFinder.java:103)
> at
> org.geotools.filter.FunctionFinder.findFunction(FunctionFinder.java:69)
> at
> org.geotools.filter.FilterFactoryImpl.function(FilterFactoryImpl.java:469)
> at
> org.geotools.feature.AttributeTypeBuilder.lengthRestriction(AttributeTypeBuilder.java:624)
> at
> org.geotools.feature.AttributeTypeBuilder.buildType(AttributeTypeBuilder.java:455)
> at
> org.geotools.feature.AttributeTypeBuilder.buildDescriptor(AttributeTypeBuilder.java:516)
> at
> org.geotools.data.shapefile.ShapefileDataStore.readAttributes(ShapefileDataStore.java:811)
> at
> org.geotools.data.shapefile.ShapefileDataStore.getSchema(ShapefileDataStore.java:714)
> at
> org.geotools.data.shapefile.ShapefileDataStore.getSchema(ShapefileDataStore.java:708)
> at
> org.geotools.data.shapefile.ShapefileDataStore.getFeatureSource(ShapefileDataStore.java:1040)
> at geom_reader.run(geom_reader.java:57)
> at java.lang.Thread.run(Thread.java:619)
>
> If I swap out 2.7.RC2 geotools with 2.6.5 geotools it works fine.
>
> I've found lots of postings about people having this exact same issue but
> they were all using maven plugin voodoo and creating these service functions
> at build time... I am not using maven but pre-built bin jars downloaded from
>
> http://sourceforge.net/projects/geotools/files/GeoTools%202.7%20Releases/2.7-RC2/
>
>
> and a simple.sh file to invoke java, keepin' it old school.
>
> I unjarred the gt-main and did find a lot of SPI files, with many functions
> inside
>
> grep -r "Length" *
> org.opengis.filter.expression.Function:org.geotools.filter.LengthFunction
> org.opengis.filter.expression.Function:org.geotools.filter.function.FilterFunction_geomLength
> org.opengis.filter.expression.Function:org.geotools.filter.function.FilterFunction_strLength
>
> The following are the jars I'm including in classpath:
>
> gt-api-2.7-RC2.jar
> gt-main-2.7-RC2.jar
> gt-opengis-2.7-RC2.jar
> gt-shapefile-2.7-RC2.jar
> jts-1.11.jar
> gt-data-2.7-RC2.jar
> gt-metadata-2.7-RC2.jar
> gt-referencing-2.7-RC2.jar
> jsr-275-1.0-beta-2.jar
>
>
> code is straight forward:
>
> Map map = new HashMap();
> map.put("url", shpfile.toURI().toURL());
> DataStore store = DataStoreFinder.getDataStore(map);
> String[] typeNames = store.getTypeNames();
> String typeName = typeNames[0];
> logger.info("typeName: " + typeName);
> FeatureSource<SimpleFeatureType, SimpleFeature>
> featureSource = store.getFeatureSource(typeName);
> SimpleFeatureType ft = featureSource.getSchema();
> Map<String, Integer> attributemap = new HashMap<String,
> Integer>();
> List<AttributeDescriptor> attrdescripts =
> ft.getAttributeDescriptors();
> for (int x = 0; x < attrdescripts.size(); x++) {
>
> attributemap.put(attrdescripts.get(x).getLocalName(), x);
> }
> FeatureCollection<SimpleFeatureType, SimpleFeature>
> collection = featureSource.getFeatures();
> FeatureIterator<SimpleFeature> iterator =
> collection.features();
> while (iterator.hasNext()) {
> }
>
>
> Any ideas?
>
> Thank you,
> --
> Signed,
> Alessandro Ferrucci
>
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