[DL-Learner SVN] SF.net SVN: dl-learner:[3264] trunk/interfaces/src/main/java/org/dllearner/ cli/Enrichment.java

[<jen...@us...>]

Revision: 3264
          http://dl-learner.svn.sourceforge.net/dl-learner/?rev=3264&view=rev
Author:   jenslehmann
Date:     2011-09-14 17:44:57 +0000 (Wed, 14 Sep 2011)
Log Message:
-----------
improved exception handling in enrichment script

Modified Paths:
--------------
    trunk/interfaces/src/main/java/org/dllearner/cli/Enrichment.java

Modified: trunk/interfaces/src/main/java/org/dllearner/cli/Enrichment.java
===================================================================
--- trunk/interfaces/src/main/java/org/dllearner/cli/Enrichment.java	2011-09-14 14:29:01 UTC (rev 3263)
+++ trunk/interfaces/src/main/java/org/dllearner/cli/Enrichment.java	2011-09-14 17:44:57 UTC (rev 3264)
@@ -36,7 +36,6 @@
 import java.security.SecureRandom;
 import java.text.DecimalFormat;
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
@@ -46,6 +45,7 @@
 import java.util.SortedSet;
 import java.util.TreeSet;
 
+import joptsimple.OptionException;
 import joptsimple.OptionParser;
 import joptsimple.OptionSet;
 
@@ -103,7 +103,6 @@
 import org.dllearner.learningproblems.Heuristics.HeuristicType;
 import org.dllearner.reasoning.FastInstanceChecker;
 import org.dllearner.reasoning.SPARQLReasoner;
-import org.dllearner.utilities.CommonPrefixMap;
 import org.dllearner.utilities.EnrichmentVocabulary;
 import org.dllearner.utilities.Helper;
 import org.dllearner.utilities.PrefixCCMap;
@@ -130,6 +129,7 @@
 import com.hp.hpl.jena.query.ResultSet;
 import com.hp.hpl.jena.rdf.model.Model;
 import com.hp.hpl.jena.rdf.model.ModelFactory;
+import com.hp.hpl.jena.sparql.engine.http.QueryExceptionHTTP;
 
 /**
  * Command Line Interface for Enrichment.
@@ -242,17 +242,8 @@
 		algorithmRuns = new LinkedList<AlgorithmRun>();
 	}
 	
-	@SuppressWarnings("unchecked")
 	public void start() throws ComponentInitException, IllegalArgumentException, SecurityException, InstantiationException, IllegalAccessException, InvocationTargetException, NoSuchMethodException, LearningProblemUnsupportedException, MalformedURLException {
-		
-		// sanity check that endpoint/graph returns at least one triple
-		String query = "SELECT * WHERE {?s ?p ?o} LIMIT 1";
-		SparqlQuery sq = new SparqlQuery(query, se);
-		ResultSet q = sq.send();
-		while (q.hasNext()) {
-			q.next();
-		}
-				
+						
 		// instantiate SPARQL endpoint wrapper component
 		SparqlEndpointKS ks = new SparqlEndpointKS(se);
 		ks.init();
@@ -721,16 +712,47 @@
 			System.out.println();
 			System.out.println(addHelp);
 			// main script
-		} else {			
-			// create SPARQL endpoint object
-			URL endpoint = (URL) options.valueOf("endpoint");
-			URI graph = (URI) options.valueOf("graph");
+		} else {	
+			// check that endpoint was specified
+			if(!options.hasArgument("endpoint")) {
+				System.out.println("Please specify a SPARQL endpoint (using the -e option).");
+				System.exit(0);
+			}			
+					
+			// create SPARQL endpoint object (check that indeed a URL was given)
+			URL endpoint = null;
+			try {
+				endpoint = (URL) options.valueOf("endpoint");
+			} catch(OptionException e) {
+				System.out.println("The specified endpoint appears not be a proper URL.");
+				System.exit(0);
+			}
+			URI graph = null;
+			try {
+				graph = (URI) options.valueOf("graph");
+			} catch(OptionException e) {
+				System.out.println("The specified graph appears not be a proper URL.");
+				System.exit(0);
+			}				
 			LinkedList<String> defaultGraphURIs = new LinkedList<String>();
 			if(graph != null) {
 				defaultGraphURIs.add(graph.toString());
 			}
 			SparqlEndpoint se = new SparqlEndpoint(endpoint, defaultGraphURIs, new LinkedList<String>());
 			
+			// sanity check that endpoint/graph returns at least one triple
+			String query = "SELECT * WHERE {?s ?p ?o} LIMIT 1";
+			SparqlQuery sq = new SparqlQuery(query, se);
+			try {
+				ResultSet q = sq.send();
+				while (q.hasNext()) {
+					q.next();
+				}
+			} catch(QueryExceptionHTTP e) {
+				System.out.println("Endpoint not reachable (check spelling).");
+				System.exit(0);
+			}
+			
 			// map resource to correct type
 			Entity resource = null;
 			if(options.valueOf("resource") != null) {
@@ -740,11 +762,6 @@
 				}
 			}
 			
-			if(!options.hasArgument("endpoint")) {
-				System.out.println("Please specify a SPARQL endpoint (using the -e option).");
-				System.exit(0);
-			}
-			
 			boolean useInference = (Boolean) options.valueOf("i");
 //			boolean verbose = (Boolean) options.valueOf("v");
 			double threshold = (Double) options.valueOf("t");

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