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Java QueryEngineHTTP类代码示例

本文整理汇总了Java中org.apache.jena.sparql.engine.http.QueryEngineHTTP类的典型用法代码示例。如果您正苦于以下问题：Java QueryEngineHTTP类的具体用法？Java QueryEngineHTTP怎么用？Java QueryEngineHTTP使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。


QueryEngineHTTP类属于org.apache.jena.sparql.engine.http包，在下文中一共展示了QueryEngineHTTP类的14个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: runSelectQuery

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
static ResultSet runSelectQuery(String queryString, String service, String... defaultGraphs) throws Exception {
    QueryEngineHTTP qExec = (QueryEngineHTTP) QueryExecutionFactory.sparqlService(service, queryString);
    qExec.addDefaultGraph(Constants.DBPEDIA_URL);
    if (defaultGraphs != null) {
        for (String defaultGraph : defaultGraphs) {
            qExec.addDefaultGraph(defaultGraph);
        }
    }
    qExec.addParam("timeout", Constants.TIMEOUT_VALUE); //100 sec
    ResultSet set = null;
    try {
        set = qExec.execSelect();
        set = ResultSetFactory.copyResults(set);
    } catch (Exception e) {
        QGenLogger.severe("Exception in SELECT\n" + queryString + "\n" + e.getMessage());
    } finally {
        qExec.close();
    }
    return set;
}
开发者ID:slidewiki，项目名称:auto-questions-service，代码行数:21，代码来源:SPARQLClient.java

示例2: createRemoteQueryExecution

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public QueryEngineHTTP createRemoteQueryExecution(
		String service,
		Query query, 
		List<String> defaultGraphURIs, 
		List<String> namedGraphURIs, 
		String user, 
		String password) {
    HttpClient httpClient = buildHttpClient(service, user, password);
	QueryEngineHTTP qexec = (QueryEngineHTTP) QueryExecutionFactoryFilter.get().sparqlService(service, query, httpClient);
	if( defaultGraphURIs.size() > 0 ) {
		qexec.setDefaultGraphURIs(defaultGraphURIs);
	}
	if( namedGraphURIs.size() > 0 ) {
		qexec.setNamedGraphURIs(namedGraphURIs);
	}
	return qexec;
}
开发者ID:TopQuadrant，项目名称:shacl，代码行数:18，代码来源:ARQFactory.java

示例3: main

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
static public void main(String...argv)
{
    String queryStr = "select distinct ?Concept where {[] a ?Concept} LIMIT 10";
    Query query = QueryFactory.create(queryStr);

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

        // Execute.
        ResultSet rs = qexec.execSelect();
        ResultSetFormatter.out(System.out, rs, query);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
开发者ID:xcurator，项目名称:xcurator，代码行数:18，代码来源:ExampleDBpedia1.java

示例4: sparql

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public String sparql(String subject) {

		// First query takes the most specific class from a given resource.
		String ontology_service = endpoint;

		String endpointsSparql = "select ?label where {<" + subject
				+ "> <http://www.w3.org/2000/01/rdf-schema#label> ?label FILTER (lang(?label) = 'en')} LIMIT 100";

		Query sparqlQuery = QueryFactory.create(endpointsSparql, Syntax.syntaxARQ);
		QueryEngineHTTP qexec = (QueryEngineHTTP) QueryExecutionFactory.sparqlService(ontology_service, sparqlQuery);
		qexec.setModelContentType(WebContent.contentTypeRDFXML);
		ResultSet results = qexec.execSelect();
		String property = null;
		while (results.hasNext()) {
			QuerySolution qs = results.next();
			property = qs.getLiteral("?label").getLexicalForm();
		}
		return property;

	}
开发者ID:dice-group，项目名称:AGDISTIS，代码行数:21，代码来源:TripleIndexCreatorContext.java

示例5: executeQuery

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public QueryExecution executeQuery(String queryString) {
    logger.info("SPARQL Query is:\n" + queryString);
    Query query = QueryFactory.create(queryString);
    QueryEngineHTTP queryEngine = (QueryEngineHTTP) QueryExecutionFactory.sparqlService(ENDPOINT, query);
    queryEngine.addParam("timeout", String.valueOf(Constants.API_TIMEOUT));
    return queryEngine;
}
开发者ID:dbpedia，项目名称:chatbot，代码行数:8，代码来源:SPARQL.java

示例6: ask

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
/**
 * 
 * @param sparql
 * @return boolean True if ASK query passes
 */
private static boolean ask(String sparql) {
	try {
		LOGGER.debug(sparql);
		Query query = QueryFactory.create(sparql, Syntax.syntaxARQ);
		httpQuery = new QueryEngineHTTP(S_E, query);
		boolean result = httpQuery.execAsk();
		LOGGER.debug(result);
		return result;
	} catch (Exception e) {
		LOGGER.error(e);
		return false;
	}
}
开发者ID:scambria，项目名称:provesense-api，代码行数:19，代码来源:ProvesenseAPI.java

示例7: ask

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public boolean ask(String query)
{
	StopWatch watch = StopWatches.INSTANCE.getWatch("sparql");
	watch.start();
	try(QueryEngineHTTP qe = new QueryEngineHTTP(endpoint, prefixes+query);)
	{			
		defaultGraphs.forEach(qe::addDefaultGraph);
		return qe.execAsk();
	} catch(Exception e) {throw new RuntimeException("Error on SPARQL ASK on endpoint "+endpoint+" with query:\n"+query,e);}
	finally {watch.stop();}
}
开发者ID:AskNowQA，项目名称:cubeqa，代码行数:12，代码来源:CubeSparql.java

示例8: select

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public ResultSetRewindable select(String query)
{
	StopWatch watch = StopWatches.INSTANCE.getWatch("sparql");
	watch.start();
	try(QueryEngineHTTP qe = new QueryEngineHTTP(endpoint, prefixes+query);) 
	{
		qe.setDefaultGraphURIs(defaultGraphs);
		return ResultSetFactory.copyResults(qe.execSelect());
	} catch(Exception e) {throw new RuntimeException("Error on sparql select on endpoint "+endpoint+" with query:\n"+query,e);}
	finally {watch.stop();}
}
开发者ID:AskNowQA，项目名称:cubeqa，代码行数:12，代码来源:CubeSparql.java

示例9: test

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
@Test public void test()
{
	String query ="select (min(xsd:double(?d)) as ?min) "
			+ "{?o a qb:Observation. ?o qb:dataSet <http://linkedspending.aksw.org/instance/finland-aid>.?o <http://linkedspending.aksw.org/ontology/finland-aid-aid-to-environment> ?d.} limit 1";
	try(QueryEngineHTTP qe = new QueryEngineHTTP("http://linkedspending.aksw.org/sparql", query))
	{
		ResultSet rs = qe.execSelect();
		QuerySolution qs = rs.nextSolution();
		assertTrue(qs.get("min").asLiteral().getDouble()==0);
	}
}
开发者ID:AskNowQA，项目名称:cubeqa，代码行数:12，代码来源:JenaNanBugTest.java

示例10: customizeRequest

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
@Override
protected void customizeRequest(QueryExecution qe) {
    super.customizeRequest(qe);
    if (qe instanceof QueryEngineHTTP) {
        QueryEngineHTTP remote = (QueryEngineHTTP) qe;
        T options = this.getOptions();
        remote.setSelectContentType(options.getResultsSelectFormat());
        remote.setAskContentType(options.getResultsAskFormat());
        remote.setModelContentType(options.getResultsGraphFormat());
        remote.setAllowDeflate(options.getAllowCompression());
        remote.setAllowGZip(options.getAllowCompression());
    }
}
开发者ID:rvesse，项目名称:sparql-query-bm，代码行数:14，代码来源:AbstractRemoteQueryCallable.java

示例11: customizeRequest

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
@Override
protected void customizeRequest(QueryExecution qe) {
    super.customizeRequest(qe);
    if (qe instanceof QueryEngineHTTP) {
        QueryEngineHTTP remote = (QueryEngineHTTP) qe;
        for (Entry<String, List<String>> nvp : this.nvps.entrySet()) {
            for (String value : nvp.getValue()) {
                remote.addParam(nvp.getKey(), value);
            }
        }
    }
}
开发者ID:rvesse，项目名称:sparql-query-bm，代码行数:13，代码来源:NvpQueryCallable.java

示例12: getNMostSpecificYAGOTypesForDepthRange

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
static List<String> getNMostSpecificYAGOTypesForDepthRange(String resourceURI, int n, int depthLowerBound, int depthUpperBound) {
        String queryString = Constants.PREFIX_RDFS;
        String variableName = "type";
        resourceURI = "<" + resourceURI + ">";
        queryString += "SELECT ?" + variableName + " ?count WHERE {\n" +
                "{\n" +
                "SELECT DISTINCT ?" + variableName + " (COUNT(*) as ?count) WHERE {\n" +
                "  {\n" +
                "   select distinct ?" + variableName + " where {\n" +
                resourceURI + " a ?" + variableName + " .\n" +
                "   filter (strstarts(str(?" + variableName + "), \"" + Constants.DBPEDIA_URL + "\"))\n" +
                "   filter (!strstarts(str(?" + variableName + "), \"" + Constants.DBPEDIA_CLASS_YAGO_WIKICAT + "\"))\n" +
                "  }\n" +
                " }\n" +
                " ?" + variableName + " rdfs:subClassOf* ?path .\n" +
                "} group by ?" + variableName + " order by desc  (?count)\n" +
                "}\n";
        if (n != -1) {
            queryString += "filter (?count < " + depthUpperBound + " && ?count > " + depthLowerBound + ")\n";
        }
        queryString += "} limit " + n;

//        ResultSet resultSet = null;
//        try {
//            resultSet = runSelectQuery(queryString, DBPEDIA_SPARQL_SERVICE);
//        } catch (Exception e) {
//            e.printStackTrace();
//        }

        QueryEngineHTTP qExec = (QueryEngineHTTP) QueryExecutionFactory.sparqlService(Constants.DBPEDIA_SPARQL_SERVICE, queryString);
        qExec.addDefaultGraph("http://dbpedia.org");
        ResultSet resultSet = null;
        try {
            resultSet = qExec.execSelect();
            resultSet = ResultSetFactory.copyResults(resultSet);
        } catch (Exception e) {
            // Report exception
        } finally {
            qExec.close();
        }
        return QueryUtils.getResultSetAsStringList(resultSet, variableName, false);
    }
开发者ID:slidewiki，项目名称:auto-questions-service，代码行数:43，代码来源:Queries.java

示例13: getLinkSUMForResource

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
static List<LinkSUMResultRow> getLinkSUMForResource(String resourceURI) {
        resourceURI = "<" + resourceURI + ">";
        String queryString = Constants.PREFIX_RDFS + Constants.PREFIX_VRANK + Constants.PREFIX_DBPEDIA_ONTOLOGY + Constants.PREFIX_DBPEDIA_PROPERTY +
                "SELECT distinct (SAMPLE (?s) AS ?subject) (SAMPLE (?p) AS ?pred) (SAMPLE(?o) AS ?object) " +
                "(SAMPLE(?slabel) AS ?sublabel) (SAMPLE (?plabel) AS ?predlabel) (SAMPLE(?olabel) AS ?oblabel) ?v \n" +
                "FROM <" + Constants.DBPEDIA_URL + "> \n" +
                "FROM <" + Constants.DBPEDIA_PAGE_RANK + "> \n" +
                "WHERE {\n" +
                "\t{\t" + resourceURI + " ?p ?o.\n" +
                "\t\tFILTER regex(str(?o),\"http://dbpedia.org/resource\",\"i\").\n" +
                "\t\tFILTER (?p != dbp-ont:wikiPageWikiLink && ?p != <http://purl.org/dc/terms/subject> " +
                "&& ?p != dbp-prop:wikiPageUsesTemplate && ?p != rdfs:seeAlso && ?p != <http://www.w3.org/2002/07/owl#differentFrom> " +
                "&& ?p != dbp-ont:wikiPageDisambiguates && ?p != dbp-ont:wikiPageRedirects && ?p != dbp-ont:wikiPageExternalLink).\n" +
                "\t\tOPTIONAL {?o rdfs:label ?olabel. FILTER langmatches( lang(?olabel), \"EN\" ). }.\n" +
                "\t\tOPTIONAL {?p rdfs:label ?plabel. FILTER langmatches( lang(?plabel), \"EN\" ).}.\n" +
                "\t\tOPTIONAL {" + resourceURI + " rdfs:label ?slabel. FILTER langmatches( lang(?slabel), \"EN\" ).}.\n" +
                "\t\tOPTIONAL {?o vrank:hasRank ?r. ?r vrank:rankValue ?v}.\n" +
                "\t} \n" +
                "UNION\n" +
                "\t{\t?s ?p " + resourceURI + ".\n" +
                "\t\tFILTER regex(str(?s),\"http://dbpedia.org/resource\",\"i\").\n" +
                "\t\tFILTER (?p != dbp-ont:wikiPageWikiLink && ?p != <http://purl.org/dc/terms/subject> " +
                "&& ?p != dbp-prop:wikiPageUsesTemplate && ?p != rdfs:seeAlso && ?p != <http://www.w3.org/2002/07/owl#differentFrom> " +
                "&& ?p != dbp-ont:wikiPageDisambiguates && ?p != dbp-ont:wikiPageRedirects && ?p != dbp-ont:wikiPageExternalLink).\n" +
                "\t\tOPTIONAL {?s rdfs:label ?slabel.   FILTER langmatches( lang(?slabel), \"EN\" ). }.\n" +
                "\t\tOPTIONAL {?p rdfs:label ?plabel.  FILTER langmatches( lang(?plabel), \"EN\" ).}.\n" +
                "\t\tOPTIONAL {" + resourceURI + " rdfs:label ?olabel. FILTER langmatches( lang(?olabel), \"EN\" ).}.\n" +
                "\t\tOPTIONAL {?s vrank:hasRank ?r. ?r vrank:rankValue ?v}.\n" +
                "\t}\n" +
                "} group by ?v order by desc (?v)";

//        ResultSet resultSet = null;
//        try {
//            resultSet = runSelectQuery(query, DBPEDIA_SPARQL_SERVICE);
//        } catch (Exception e) {
//            e.printStackTrace();
//        }

//        String DBPEDIA_SPARQL_SERVICE = "http://dbpedia.org/sparql/";
        QueryEngineHTTP qExec = (QueryEngineHTTP) QueryExecutionFactory.sparqlService(Constants.DBPEDIA_SPARQL_SERVICE, queryString);
        qExec.addDefaultGraph(Constants.DBPEDIA_URL);
        ResultSet resultSet = null;
        try {
            resultSet = qExec.execSelect();
            resultSet = ResultSetFactory.copyResults(resultSet);
        } catch (Exception e) {
            // Report exception
        } finally {
            qExec.close();
        }

//        if (resultSet != null) {
//            while (resultSet.hasNext()) {
//                QuerySolution result = resultSet.next();
//                if (result != null) {
//                    System.out.println(result);
//                }
//            }
//        }

        return QueryUtils.getResultSetAsObjectList(resultSet);
    }
开发者ID:slidewiki，项目名称:auto-questions-service，代码行数:63，代码来源:Queries.java

示例14: Cixty_Query

import org.apache.jena.sparql.engine.http.QueryEngineHTTP; //导入依赖的package包/类
public String Cixty_Query(String city, String publisher, String output) {

        String queryString ="PREFIX dul: <http://ontologydesignpatterns.org/ont/dul/DUL.owl#>\n" +
                "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n"+
                "PREFIX dc: <http://purl.org/dc/elements/1.1/>\n" +
                "PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>\n"+
                "PREFIX locationOnt: <http://data.linkedevents.org/def/location#>" +
                "select * where { \n" +
                " graph <http://3cixty.com/" + city + '/' + publisher + ">{?s a dul:Place}\n" +
                " ?s rdfs:label ?label .\n" +
                " ?s locationOnt:businessTypeTop ?category .\n" +
                " ?s dc:identifier ?identifier .\n" +
                " ?s dc:publisher ?publisher .\n" +
                " ?s geo:location/geo:lat ?latitude .\n" +
                " ?s geo:location/geo:long ?longitude .\n" +
                " ?s dc:publisher ?publisher\n" +
                "}";

        try {

            System.out.println(queryString);
            Query query = QueryFactory.create(queryString, Syntax.syntaxARQ);

            //send sparql to endpoint
            QueryEngineHTTP httpQuery = QueryExecutionFactory.createServiceRequest(sparqlEndpoint,query);
            ResultSet results = httpQuery.execSelect();

            //output a result to a JSON file
            File file = new File(output + '/' + city + '_' + publisher + ".cixtyjson");
            FileOutputStream fout = new FileOutputStream(file);
            ResultSetFormatter.outputAsJSON(fout, results);

            fout.close();
            httpQuery.close();
            System.out.println(file.getName());
            return (output + '/' + city + '_' + publisher + ".cixtyjson");
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
开发者ID:giusepperizzo，项目名称:geosummly，代码行数:43，代码来源:DynamicReader.java


注：本文中的org.apache.jena.sparql.engine.http.QueryEngineHTTP类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。