Hi,
I'm trying to use the Geotools WFS module in my Google Web Toolkit project.
Unfortunately, when I try and create my WFSDataStore I get a
ClassCastException. Any idea what might cause this?
My project uses Maven and Geotools 2.7.0. However, another of my
dependencies (52 North WPS client) uses Geotools 2.4.2 so there are some of
those jars there too... could this cause problems?
My code and the exception are show below. Any help would be greatly
appreciated.
Thanks!
Jon
CODE:
String url1 = "
http://li199-25.members.linode.com:8080/geoserver/ows?service=wfs&version=1.1.0&request=GetCapabilities
";
Map<String, String> connectionParameters = new HashMap<String, String>();
connectionParameters.put("WFSDataStoreFactory:GET_CAPABILITIES_URL", url1);
try {
//WFSDataStoreFactory fact;
WFSDataStore data = (WFSDataStore)
DataStoreFinder.getDataStore(connectionParameters);
String[] typeNames = data.getTypeNames();
ArrayList<WFSFeatureType> wfsLayers = new ArrayList<WFSFeatureType>();
for (int i = 0; i < typeNames.length; i++) {
String typeName = typeNames[i];
WFSFeatureType newLayer = new WFSFeatureType();
newLayer.setName(typeName);
newLayer.setTitle(data.getFeatureTypeTitle(typeName));
newLayer.setAbstract(data.getFeatureTypeAbstract(typeName));
wfsLayers.add(newLayer);
}
response.setWFSLayers(wfsLayers);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
EXCEPTION:
[WARN] Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public
abstract uk.ac.glam.smartwps.client.net.WFSGetCapabilitiesResponse
uk.ac.glam.smartwps.client.net.OWSRequestService.wfsGetCapabilities(java.lang.String)'
threw an unexpected exception: java.lang.ClassCastException
at
com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: java.lang.ClassCastException
at
javax.imageio.spi.ServiceRegistry.registerServiceProvider(ServiceRegistry.java:254)
at org.geotools.factory.FactoryRegistry.register(FactoryRegistry.java:876)
at
org.geotools.factory.FactoryRegistry.scanForPlugins(FactoryRegistry.java:786)
at
org.geotools.factory.FactoryRegistry.getServiceProviders(FactoryRegistry.java:196)
at
org.geotools.factory.FactoryRegistry.getServiceProviders(FactoryRegistry.java:160)
at
org.geotools.data.DataStoreFinder.getAvailableDataStores(DataStoreFinder.java:115)
at org.geotools.data.DataStoreFinder.getDataStore(DataStoreFinder.java:84)
at
uk.ac.glam.smartwps.server.OWSRequestServiceImpl.wfsGetCapabilities(OWSRequestServiceImpl.java:581)
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:597)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
... 22 more
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