Package com.hp.hpl.jena.query

Examples of com.hp.hpl.jena.query.QueryExecution

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
        System.out.println() ;
       
        // Create a single execution of this query, apply to a model
        // which is wrapped up as a Dataset
       
        QueryExecution qexec = QueryExecutionFactory.create(query, model) ;
        // Or QueryExecutionFactory.create(queryString, model) ;

        try {
            // A ResultSet is an iterator - any query solutions returned by .next()
            // are not accessible again.
            // Create a ResultSetRewindable that can be reset to the beginning.
            // Do before first use.
           
            ResultSetRewindable rewindable = ResultSetFactory.makeRewindable(qexec.execSelect()) ;
            ResultSetFormatter.out(rewindable) ;
            rewindable.reset() ;
            ResultSetFormatter.out(rewindable) ;
        }
        finally
        {
            // QueryExecution objects should be closed to free any system resources
            qexec.close() ;
        }
    }
View Full Code Here
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
        System.out.println() ;
       
        // Create a single execution of this query, apply to a model
        // which is wrapped up as a Dataset
       
        QueryExecution qexec = QueryExecutionFactory.create(query, model) ;
        // Or QueryExecutionFactory.create(queryString, model) ;

        System.out.println("Titles: ") ;
       
        try {
            // Assumption: it's a SELECT query.
            ResultSet rs = qexec.execSelect() ;
           
            // The order of results is undefined.
            for ( ; rs.hasNext() ; )
            {
                QuerySolution rb = rs.nextSolution() ;
               
                // Get title - variable names do not include the '?' (or '$')
                RDFNode x = rb.get("title") ;
               
                // Check the type of the result value
                if ( x.isLiteral() )
                {
                    Literal titleStr = (Literal)x  ;
                    System.out.println("    "+titleStr) ;
                }
                else
                    System.out.println("Strange - not a literal: "+x) ;
                   
            }
        }
        finally
        {
            // QueryExecution objects should be closed to free any system resources
            qexec.close() ;
        }
    }
View Full Code Here
164
165
166
167
168
169
170
171
172
173
174
           
            if ( printPlan )
            {
                divider() ;
                // This forces internal query initialization - must be after QueryUtils.checkQuery
                QueryExecution qExec = QueryExecutionFactory.create(query, DatasetFactory.createMem()) ;
                QueryOutputUtils.printPlan(query, qExec) ;
            }
        }
        catch (ARQInternalErrorException intEx)
        {
View Full Code Here
65
66
67
68
69
70
71
72
73
74
75
76
77
78
      // Important: specifying that the query is in Terp syntax
      Query q = QueryFactory.read( query, TerpSyntax.getInstance() );
 
      // Create a SPARQL-DL query execution for the given query and
      // ontology model
      QueryExecution qe = SparqlDLExecutionFactory.create( q, m );
 
      // We want to execute a SELECT query, do it, and return the result set
      ResultSet rs = qe.execSelect();
 
      // There are different things we can do with the result set, for
      // instance iterate over it and process the query solutions or, what we
      // do here, just print out the results
      ResultSetFormatter.out( rs );
View Full Code Here
61
62
63
64
65
66
67
68
69
70
71
72
73
74
      // Now read the query file into a query object
      Query q = QueryFactory.read( query );
 
      // Create a SPARQL-DL query execution for the given query and
      // ontology model
      QueryExecution qe = SparqlDLExecutionFactory.create( q, m );
 
      // We want to execute a SELECT query, do it, and return the result set
      ResultSet rs = qe.execSelect();
 
      // Print the query for better understanding
      System.out.println(q.toString());
     
      // There are different things we can do with the result set, for
View Full Code Here
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
        // Force setup
        {
            getStore() ;
            getModStore().getDataset() ;
            Query query = modQuery.getQuery() ;
            QueryExecution qExec = QueryExecutionFactory.create(query, getModStore().getDataset()) ;
            // Don't execute
            qExec.abort();
        }
       
        if ( getModTime().timingEnabled() )
        {
            // Setup costs : flush classes into memory and establish connection
            getModTime().startTimer() ;
            long connectTime =  getModTime().endTimer() ;
            //System.out.println("Connect time:    "+timeStr(connectTime)) ;
           
            getModTime().startTimer() ;
            Query query = modQuery.getQuery() ;
            long javaTime = getModTime().endTimer() ;
           
            if ( isVerbose() )
                System.out.println("Class load time: "+getModTime().timeStr(javaTime)) ;
        }
       
       
        long totalTime = 0 ;
        try {
            getModTime().startTimer() ;
            for ( int i = 0 ; i < repeatCount ; i++ )
            {
//                if ( i == 2 )
//                {
//                    // Reset timer to forget classloading overhead
//                    getModTime().endTimer() ;
//                    getModTime().startTimer() ;
//                }
                   
                Query query = modQuery.getQuery() ;
                QueryExecution qExec = QueryExecutionFactory.create(query, getModStore().getDataset()) ;
               
                if ( isVerbose() )
                    PrintSDB.print(((QueryExecutionBase)qExec).getPlan().getOp()) ;
               
                if ( false )
                    System.err.println("Execute query for loop "+(i+1)+" "+memStr()) ;
                QueryExecUtils.executeQuery(query, qExec, modResults.getResultsFormat()) ;
                qExec.close() ;
            }
            long queryTime = getModTime().endTimer() ;
            totalTime = queryTime ;
        } catch (QueryException ex)
        {
View Full Code Here
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
    public static QuerySolution[] executeSimpleSparql(Model model, String queryStr) {
        LinkedList results = new LinkedList();       
        model.enterCriticalSection(Lock.READ) ;//Concurrency protect, it is  absolutely not neccesary but is recommended
        try{
            Query query = QueryFactory.create(queryStr) ;
            QueryExecution qexec = null;
            try {
                qexec = QueryExecutionFactory.create(query, model) ;
               
                ResultSet resultsSet = qexec.execSelect();               
                for ( ; resultsSet.hasNext() ; )
                {
                    QuerySolution soln = resultsSet.nextSolution() ;                   
                    results.add(soln);                 
                }
            } finally {
                qexec.close() ;
            }
        }finally {
            model.leaveCriticalSection() ;
        }       
        return (QuerySolution[]) results.toArray(new QuerySolution[results.size()]);
View Full Code Here
78
79
80
81
82
83
84
85
    }
   
   
    public static boolean runQuestion(Model model,String queryString) {
        Query query = QueryFactory.create(queryString) ;
        QueryExecution qe = QueryExecutionFactory.create(query, model);       
        return qe.execAsk();
    }
View Full Code Here
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
    // to be thrown.
    // QueryExecutionFactory.create requires
    // (java.io.FilePermission [etc/]location-mapping.* read)
    // Thus, they are placed within doPrivileged
        getDataset().setDefaultModel(null);
    QueryExecution qexec = AccessController
        .doPrivileged(new PrivilegedAction<QueryExecution>() {

          @Override
          public QueryExecution run() {
            com.hp.hpl.jena.query.Query jenaQuery = QueryFactory
                .create(query);
            return QueryExecutionFactory.create(jenaQuery, getDataset());
          }
        });

    try {
      try {
        return new ResultSetWrapper(qexec.execSelect());
      } catch (QueryExecException e) {
        try {
          return Boolean.valueOf(qexec.execAsk());
        } catch (QueryExecException e2) {
          try {
            return new JenaGraphAdaptor(qexec.execDescribe()
                .getGraph()).getGraph();
          } catch (QueryExecException e3) {
            return new JenaGraphAdaptor(qexec.execConstruct()
                .getGraph()).getGraph();
          }
        }
      }
    } finally {
      qexec.close();
    }
    }
View Full Code Here
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
        // Prefix mapping just helps serialization
        query.getPrefixMapping().setNsPrefix("dc" , DC.getURI()) ;
        query.serialize(new IndentedWriter(System.out,true)) ;
        System.out.println() ;
       
        QueryExecution qexec = QueryExecutionFactory.create(query, model) ;
       
        try {
            // Assumption: it's a SELECT query.
            ResultSet rs = qexec.execSelect() ;
           
            // The order of results is undefined.
            System.out.println("Titles: ") ;
            for ( ; rs.hasNext() ; )
            {
                QuerySolution rb = rs.nextSolution() ;
               
                // Get title - variable names do not include the '?' (or '$')
                RDFNode x = rb.get("title") ;
               
                // Check the type of the result value
                if ( x instanceof Literal )
                {
                    Literal titleStr = (Literal)x  ;
                    System.out.println("    "+titleStr) ;
                }
                else
                    System.out.println("Strange - not a literal: "+x) ;
                   
            }
        }
        finally
        {
            // QueryExecution objects should be closed to free any system resources
            qexec.close() ;
        }
    }
View Full Code Here
TOP

Related Classes of com.hp.hpl.jena.query.QueryExecution

  • arq.examples.bgpmatching.StageAltMain
  • arq.examples.Ex1
  • arq.examples.Ex2
  • arq.examples.ExampleDBpedia
  • arq.examples.ExProg1
  • arq.examples.ExProg2
  • arq.examples.ExQuerySelect1
  • arq.examples.ExQuerySelect2
  • arq.examples.larq.ExLucene1
  • arq.examples.propertyfunction.labelSearch
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.