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

com.hp.hpl.jena.query.Query
The data structure for a query as presented externally. There are two ways of creating a query - use the parser to turn a string description of the query into the executable form, and the programmatic way (the parser is calling the programmatic operations driven by the quyery string). The declarative approach of passing in a string is preferred. Once a query is built, it can be passed to the QueryFactory to produce a query execution engine. @see QueryExecutionFactory @see ResultSet


    if ( entities == null ) {
      entities = new ArrayList<PropertyInfo>();
    }
    
    Query query = QueryFactory.create(propertiesQuery);
    QueryExecution qe = QueryExecutionFactory.create(query, ontModel);
    
    ResultSet results = qe.execSelect();
    
    while ( results.hasNext() ) {

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    if ( entities == null ) {
      entities = new ArrayList<ClassInfo>();
    }
    
    Query query = QueryFactory.create(CLASSES_QUERY);
    QueryExecution qe = QueryExecutionFactory.create(query, ontModel);
    
    ResultSet results = qe.execSelect();
    
    while ( results.hasNext() ) {

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    // added the try-catch-warn below while further investigating  
    // http://code.google.com/p/mmisw/issues/detail?id=253
    // It happened that the CSV has a record spanning two rows; the second row started in the
    // middle of a comment, which was taken as the URI of the entity.
    Query query;
    try {
      query = QueryFactory.create(queryStr);
    }
    catch ( RuntimeException ex ) {
      log.warn("_addProps: entityUri=[" +entityUri+ "] queryStr=[" +queryStr+ "]", ex);

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    if ( mappings == null ) {
      mappings = new ArrayList<Mapping>();
    }
    
    Query query = QueryFactory.create(SKOS_QUERY);
    QueryExecution qe = QueryExecutionFactory.create(query, ontModel);
    
    ResultSet results = qe.execSelect();
    
    while ( results.hasNext() ) {

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{
    static public void main(String...argv)
    {
        try {
            String queryStr = "select distinct ?Concept where {[] a ?Concept} LIMIT 10";
            Query query = QueryFactory.create(queryStr);


            // Remote execution.
            QueryExecution qexec = QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql", query);
            // Set the DBpedia specific timeout.
            ((QueryEngineHTTP)qexec).addParam("timeout", "10000") ;

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public class TestVarScope extends BaseTest
{
    private static void scope(String queryStr)
    {
        Query query = QueryFactory.create(queryStr) ;
        SyntaxVarScope.check(query) ;
    }

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    }
    
    @Override
    protected void runTestForReal() throws Throwable
    {
        Query query = null ;
        try {
            try { query = queryFromTestItem(testItem) ; }
            catch (QueryException qEx)
            {
                query = null ;
                qEx.printStackTrace(System.err) ;
                fail("Parse failure: "+qEx.getMessage()) ;
                throw qEx ;
            }


            Dataset dataset = setUpDataset(query, testItem) ;
            if ( dataset == null && ! doesQueryHaveDataset(query) ) 
                fail("No dataset for query") ;


            QueryExecution qe = null ;
            
            if ( dataset == null )
                qe = QueryExecutionFactory.create(query, queryFileManager) ;
            else
                qe = QueryExecutionFactory.create(query, dataset) ;
            
            try {
                if ( query.isSelectType() )
                    runTestSelect(query, qe) ;
                else if ( query.isConstructType() )
                    runTestConstruct(query, qe) ;
                else if ( query.isDescribeType() )
                    runTestDescribe(query, qe) ;
                else if ( query.isAskType() )
                    runTestAsk(query, qe) ;
            } finally { qe.close() ; }
        }
        catch (IOException ioEx)
        {

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    }
    
    private static void check(String queryString, String opExpectedString)
    {
        queryString = "PREFIX : <http://example/>\n"+queryString ;
        Query query = QueryFactory.create(queryString) ;
        Op opQuery = Algebra.compile(query) ;
        check(opQuery, opExpectedString) ;
    }

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        return query(string, m, null, null) ;
    }


    private static ResultSet query(String string, Model m, String varName, RDFNode value)
    {
        Query query = QueryFactory.create(prefixes+string) ;
        QuerySolutionMap initValues = null ;
        if ( varName != null )
            initValues = querySolution(varName, value) ;
        QueryExecution qExec = QueryExecutionFactory.create(query, m, initValues) ;
        ResultSet rs = ResultSetFactory.copyResults(qExec.execSelect()) ;

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    private void execute(String queryString, HttpActionQuery action)
    {
        String queryStringLog = formatForLog(queryString) ;
        log.info(format("[%d] Query = %s", action.id, queryStringLog));


        Query query = null ;
        try {
            // NB syntax is ARQ (a superset of SPARQL)
            query = QueryFactory.create(queryString, Syntax.syntaxARQ) ;
            queryStringLog = formatForLog(query) ;
        }

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