[postgis-users] error when try to getFeatureSource

[Qian C.Y.]

I can connect to postgresql database, but when I try to getFeatureSource().
Would you please help me??

2007-3-21 10:39:17 FactoryRegistry scanForPlugins
警告: Can't load a service for category "CRSAuthorityFactory". Cause is
"NoClassDefFoundError: javax/units/ConversionException".
2007-3-21 10:39:17 FactoryRegistry scanForPlugins
警告: Can't load a service for category "CRSAuthorityFactory". Cause is
"NoClassDefFoundError: javax/units/ConversionException".
2007-3-21 10:39:17 FactoryRegistry scanForPlugins
警告: Can't load a service for category "CRSAuthorityFactory". Cause is
"NoClassDefFoundError: javax/units/ConversionException".
Exception in thread "main" java.lang.StackOverflowError
        at java.util.HashSet.iterator(HashSet.java:154)
        at javax.imageio.spi.DigraphNode.getOutNodes(DigraphNode.java:59)
        at javax.imageio.spi.PartialOrderIterator.next(
PartiallyOrderedSet.java:179)
        at javax.imageio.spi.FilterIterator.advance(ServiceRegistry.java
:792)
        at javax.imageio.spi.FilterIterator.<init>(ServiceRegistry.java:787)
        at javax.imageio.spi.ServiceRegistry.getServiceProviders(
ServiceRegistry.java:491)
        at org.geotools.factory.FactoryRegistry.getServiceProviders(
FactoryRegistry.java:167)
        at org.geotools.factory.FactoryRegistry.getServiceProviders(
FactoryRegistry.java:117)
        at org.geotools.factory.FactoryRegistry.getServiceProvider(
FactoryRegistry.java:275)
        at org.geotools.factory.FactoryRegistry.getServiceProvider(
FactoryRegistry.java:254)
        at org.geotools.factory.FactoryCreator.getServiceProvider(
FactoryCreator.java:115)
        at org.geotools.referencing.FactoryFinder.getAuthorityFactory(
FactoryFinder.java:235)
        at org.geotools.referencing.FactoryFinder.getCRSAuthorityFactory(
FactoryFinder.java:496)
        at
org.geotools.referencing.factory.epsg.LongitudeFirstFactory.createBackingStore
(LongitudeFirstFactory.java:180)
        at
org.geotools.referencing.factory.DeferredAuthorityFactory.getBackingStore(
DeferredAuthorityFactory.java:136)
        at
org.geotools.referencing.factory.BufferedAuthorityFactory.isAvailable(
BufferedAuthorityFactory.java:206)
        at
org.geotools.referencing.factory.DeferredAuthorityFactory.isAvailable(
DeferredAuthorityFactory.java:124)
        at org.geotools.factory.FactoryRegistry$DefaultFilter.filter(
FactoryRegistry.java:76)
        at javax.imageio.spi.FilterIterator.advance(ServiceRegistry.java
:793)
        at javax.imageio.spi.FilterIterator.<init>(ServiceRegistry.java:787)
        at javax.imageio.spi.ServiceRegistry.getServiceProviders(
ServiceRegistry.java:491)
        at org.geotools.factory.FactoryRegistry.getServiceProviders(
FactoryRegistry.java:167)
        at ......
....................................
....................................

and the code:

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.FeatureSource;
import org.geotools.data.postgis.PostgisDataStore;
import org.geotools.data.postgis.PostgisDataStoreFactory;

public class Postgis {
    @SuppressWarnings("unchecked")
    /** Creates a new instance of Postgis */
    public Postgis(String host,int port,String database,String user,String
password) {
        params= new HashMap();
        params.put("dbtype","postgis");
        params.put("host",host);
        params.put("port",new Integer(port));
        params.put("database",database);
        params.put("user",user);
        params.put("passwd",password);
    }

    public void connect(){
        try {
            //pgDataStore=(PostgisDataStore)factory.createDataStore(params);
            pgDataStore=DataStoreFinder.getDataStore(params);
            ................
    }

    public void getFS(String featureName){
        try {
            FeatureSource fsBC=pgDataStore.getFeatureSource(featureName);
        } catch (IOException ex) {
            ex.printStackTrace();
           .........
        }
    }

    public static void main(String[] args) throws IOException {
        Postgis pg=new Postgis("localhost",5432,"mapdb","user","passwd");
        pg.connect();
        pg.getFS("roads");
   }

    private Map params;
    private DataStore pgDataStore;
    //private PostgisDataStoreFactory factory=new PostgisDataStoreFactory();

}
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20070321/4b0bffcd/attachment.html>