On 4/04/2017 22:48, Ilya Ushakov wrote:
Hi Everyone,
I use evn 5.3.
I try to write sparqlmotion script thats exports exports taxonomies.
I need to change skos:hasTopConcept property in result set.
For make this do next:
1. For building resultset I use sml:ApplyConstruct with query inside:
CONSTRUCT {
?a ?b ?c .
}
WHERE {
{
SELECT ?a ?b ?c
WHERE {
{
{
BIND (IRI(?selectedGraph) AS ?graphName) .
BIND (IRI(?nodeURI) AS ?taxUri) .
GRAPH ?graphName {
?a (skos:broader)* ?taxUri .
?a ?b ?c .
} .
} .
}
UNION
{
BIND (IRI(?selectedGraph) AS ?graphName) .
GRAPH ?graphName {
?a a skos:ConceptScheme .
?a ?b ?c .
} .
} .
}
} .
}
FWIW I don't see the need for the nested SELECT in the query above. Just
leave the UNION, as it will project the ?a ?b ?c variables into the
CONSTRUCT clause anyway.
2. on the next step I try to use the sml:PerformUpdate
2.1. In case of using next query:
DELETE {
?a skos:hasTopConcept ?oldValue .
}
INSERT {
?a skos:hasTopConcept ?newValue .
}
WHERE {
BIND (IRI(?nodeURI) AS ?newValue) .
?a ?b ?c .
?a skos:hasTopConcept ?oldValue .
}
I got NullPointerException in log
org.topbraidlive.sparqlmotion: Exception in SPARQLMotion Servlet
(java.lang.NullPointerException)
org.topbraid.spin.sparqlmotion.modules.SMException:
java.lang.NullPointerException
at
org.topbraidlive.sparqlmotion.modules.performUpdate.PerformUpdateModule.execute(PerformUpdateModule.java:76)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:203)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:169)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:119)
at
org.topbraidlive.sparqlmotion.servlets.sparqlmotion.SPARQLMotionServlet.run(SPARQLMotionServlet.java:342)
at
org.topbraidlive.sparqlmotion.servlets.sparqlmotion.SPARQLMotionServlet.doGet(SPARQLMotionServlet.java:249)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at
org.topbraid.auth.servlet.TBAuthEnabledServlet.service(TBAuthEnabledServlet.java:41)
at
org.topbraid.eclipsex.servlet.TBHttpServlet.service(TBHttpServlet.java:155)
at
org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:180)
at
org.eclipse.equinox.http.servlet.internal.HttpServiceRuntimeImpl$LegacyServlet.service(HttpServiceRuntimeImpl.java:1221)
at
org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
at
org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
at
org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:132)
at
org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.service(ProxyServlet.java:100)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at
org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:152)
at
org.topbraidlive.servletbridge.webapplicationserver.BridgeServlet.service(BridgeServlet.java:259)eServlet.java:352)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)lterChain.java:207)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)ava:240)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)java:614)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)a:88)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)2)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
java.lang.Thread.run(Thread.java:745)read$WrappingRunnable.run(TaskThread.java:61)
Caused bat
org.topbraidlive.sparqlmotion.modules.performUpdate.PerformUpdateGraphStore.<init>(PerformUpdateGraphStore.java:105)
at
org.topbraidlive.sparqlmotion.modules.performUpdate.PerformUpdateModule.execute(PerformUpdateModule.java:55))
The graph produced by a sml:ApplyConstruct is temporary and has no URI.
As such it also cannot be updated via sml:PerformUpdate. I also do not
believe that you really want to manipulate the underlying data graph
during the script as below.
2.2. In case of using GRAPH keyword inside DELETE and INSERT accoring
to descrioption of sml:PerformUpdate
DELETE {
GRAPH ?graphName {
?a skos:hasTopConcept ?oldValue .
} .
}
INSERT {
GRAPH ?graphName {
?a skos:hasTopConcept ?newValue .
} .
}
WHERE {
BIND (IRI(?selectedGraph) AS ?graphName) .
BIND (IRI(?nodeURI) AS ?newValue) .
?a ?b ?c .
?a skos:hasTopConcept ?oldValue .
}
I got, "Unbound graph variable in sml:PerformUpdate" error message.
org.topbraidlive.sparqlmotion: Exception in SPARQLMotion Servlet
(Unbound graph variable in sml:PerformUpdate)
org.topbraid.spin.sparqlmotion.modules.SMException: Unbound graph
variable in sml:PerformUpdate
at
org.topbraidlive.sparqlmotion.modules.performUpdate.PerformUpdateArgs.<init>(PerformUpdateArgs.java:52)
at
org.topbraidlive.sparqlmotion.modules.performUpdate.PerformUpdateModule.execute(PerformUpdateModule.java:51)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:203)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:169)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:119)
at
org.topbraidlive.sparqlmotion.servlets.sparqlmotion.SPARQLMotionServlet.run(SPARQLMotionServlet.java:342)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)tionServlet.doGet(SPARQLMotionServlet.java:249)
at
org.topbraid.eclipsex.servlet.TBHttpServlet.service(TBHttpServlet.java:155).java:41)
at
org.eclipse.equinox.http.servlet.internal.HttpServiceRuntimeImpl$LegacyServlet.service(HttpServiceRuntimeImpl.java:1221)
at
org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
at
org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.service(ProxyServlet.java:100)java:132)
at
org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:152)
at
org.topbraidlive.servletbridge.webapplicationserver.BridgeServlet.service(BridgeServlet.java:259)eServlet.java:352)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)lterChain.java:207)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)ava:240)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)java:614)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)a:88)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)2)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
java.lang.Thread.run(Thread.java:745)read$WrappingRunnable.run(TaskThread.java:61)
What did i wrong?
Overall I think you should switch from SPARQLMotion to SWP. SWP has the
option to use temporary graphs as named graphs. Basically do something like
<ui:group>
<ui:update ui:updateQuery="{!
INSERT {
GRAPH ui:tempGraph {
?a ?b ?c .
}
}
WHERE {
{
{
BIND (IRI(?selectedGraph) AS ?graphName) .
BIND (IRI(?nodeURI) AS ?taxUri) .
GRAPH ?graphName {
?a (skos:broader)* ?taxUri .
?a ?b ?c .
} .
} .
}
UNION
{
BIND (IRI(?selectedGraph) AS ?graphName) .
GRAPH ?graphName {
?a a skos:ConceptScheme .
?a ?b ?c .
} .
} .
} }" />
<ui:update ui:updateQuery="{!
DELETE {
GRAPH ui:tempGraph {
?a skos:hasTopConcept ?oldValue .
} .
}
INSERT {
GRAPH ui:tempGraph {
?a skos:hasTopConcept ?newValue .
} .
}
WHERE {
BIND (IRI(?nodeURI) AS ?newValue) .
?a skos:hasTopConcept ?oldValue .
} }" />
<ui:setContext ui:queryGraph="{= ui:tempGraph }">
<ui:return />
</ui:setContext>
</ui:group>
This assumes that you want to produce a service that creates an output
graph in Turtle serialization. For other scenarios, please describe what
you need.
If you want to avoid SWP and continue with SPARQLMotion, you could try
to reformulate the sml:ApplyConstruct query so that it does the
replacement of the hasTopConcept triple on-the-fly, in a single query. I
don't see why this wouldn't work in your case, but then I don't have the
full scenario either.
HTH
Holger
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Suite Users", the topics of which include the TopBraid Suite family of products and
its base technologies such as SPARQLMotion, SPARQL Web Pages and SPIN.
To post to this group, send email to [email protected]
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