org.apache.jena.query.Query.getProjectVars()方法的使用及代码示例

x33g5p2x  于2022-01-28 转载在 其他  
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本文整理了Java中org.apache.jena.query.Query.getProjectVars方法的一些代码示例，展示了Query.getProjectVars的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Query.getProjectVars方法的具体详情如下：
包路径：org.apache.jena.query.Query
类名称：Query
方法名：getProjectVars

Query.getProjectVars介绍

[英]Return a list of the variables requested (SELECT)
[中]返回所请求变量的列表（选择）

代码示例

代码示例来源：origin: org.apache.jena/jena-querybuilder

  1. /**
  2.  * Get the list of variables from the query.
  3.  * 
  4.  * @return The list of variables in the query.
  5.  */
  6. public List<Var> getVars() {
  7.   return query.getProjectVars();
  8. }

代码示例来源：origin: apache/jena

  1. /**
  2.  * Get the list of variables from the query.
  3.  * 
  4.  * @return The list of variables in the query.
  5.  */
  6. public List<Var> getVars() {
  7.   return query.getProjectVars();
  8. }

代码示例来源：origin: SmartDataAnalytics/jena-sparql-api

  1. public static Var extractProjectVar(Query query) {
  2.   List<Var> vars = query.getProjectVars();
  3.   if(vars.size() != 1) {
  4.     throw new RuntimeException("Exactly 1 var expected");
  5.   }
  6.   Var result = vars.get(0);
  7.   return result;
  8. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. /**
  2.  * Returns triple patterns for each projection variable v such that v is in subject position.
  3.  * @param query The SPARQL query.
  4.  * @return
  5.  */
  6. public Map<Var,Set<Triple>> extractIncomingTriplePatternsForProjectionVars(Query query){
  7.   Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  8.   for (Var var : query.getProjectVars()) {
  9.     Set<Triple> triplePatterns = new HashSet<>(extractIncomingTriplePatterns(query, var));
  10.     var2TriplePatterns.put(var, triplePatterns);
  11.   }
  12.   return var2TriplePatterns;
  13. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. /**
  2.  * Returns triple patterns for each projection variable v such that v is in subject position.
  3.  * @param query The SPARQL query.
  4.  * @return
  5.  */
  6. public Map<Var,Set<Triple>> extractOutgoingTriplePatternsForProjectionVars(Query query){
  7.   Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  8.   for (Var var : query.getProjectVars()) {
  9.     Set<Triple> triplePatterns = new HashSet<>(extractOutgoingTriplePatterns(query, var));
  10.     var2TriplePatterns.put(var, triplePatterns);
  11.   }
  12.   return var2TriplePatterns;
  13. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. /**
  2.  * Returns triple patterns for each projection variable v such that v is in object position.
  3.  * @param query The SPARQL query.
  4.  * @return
  5.  */
  6. public Map<Var,Set<Triple>> extractIngoingTriplePatternsForProjectionVars(Query query){
  7.   Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  8.   for (Var var : query.getProjectVars()) {
  9.     Set<Triple> triplePatterns = new HashSet<>(extractIncomingTriplePatterns(query, var));
  10.     var2TriplePatterns.put(var, triplePatterns);
  11.   }
  12.   return var2TriplePatterns;
  13. }

代码示例来源：origin: org.aksw.jena-sparql-api/jena-sparql-api-cache

  1. @Override
  2. public QueryExecution createQueryExecution(Op indexPattern, Query query) {
  3.   ProjectedQuadFilterPattern pqfp = AlgebraUtils.transform(indexPattern);
  4.   if(pqfp == null) {
  5.     throw new RuntimeException("Query is not indexable: " + query);
  6.   }
  7.   Set<Var> indexVars = new HashSet<>(query.getProjectVars());
  8.   QueryExecution result = new QueryExecutionViewCacheFragment(query, pqfp, decoratee, conceptMap, indexVars, indexResultSetSizeThreshold);
  9.   return result;
  10. }

代码示例来源：origin: SmartDataAnalytics/jena-sparql-api

  1. @Override
  2. public QueryExecution createQueryExecution(Op indexPattern, Query query) {
  3.   ProjectedQuadFilterPattern pqfp = AlgebraUtils.transform(indexPattern);
  4.   if(pqfp == null) {
  5.     throw new RuntimeException("Query is not indexable: " + query);
  6.   }
  7.   Set<Var> indexVars = new HashSet<>(query.getProjectVars());
  8.   QueryExecution result = new QueryExecutionViewCacheFragment(query, pqfp, decoratee, conceptMap, indexVars, indexResultSetSizeThreshold);
  9.   return result;
  10. }

代码示例来源：origin: SmartDataAnalytics/jena-sparql-api

  1. public static boolean isDistinctConceptVar(Query query, Var conceptVar) {
  2.   boolean isDistinct = query.isDistinct();
  3.   Collection<Var> projectVars = query.getProjectVars();
  4.   boolean hasSingleVar = !query.isQueryResultStar() && projectVars != null && projectVars.size() == 1;
  5.   boolean result = isDistinct && hasSingleVar && projectVars.iterator().next().equals(conceptVar);
  6.   return result;
  7. }

代码示例来源：origin: SmartDataAnalytics/Sparqlify

  1. private ResultSet createEmptyResultSet() {
  2.   List<String> vars = new ArrayList<String>();
  3.   for(Var v : query.getProjectVars()) {
  4.     vars.add(v.getName());
  5.   }
  6.   return org.apache.jena.query.ResultSetFactory.create(new QueryIterNullIterator(null), vars);
  7. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. public static CBDStructureTree getOptimalCBDStructure(Query query) {
  2.   CBDStructureTree tree = new CBDStructureTree("root");
  3.   Var var = query.getProjectVars().get(0);
  4.   getOptimalCBDStructure(query, tree, var.asNode(), null, "");
  5.   return tree;
  6. }

代码示例来源：origin: dice-group/NLIWOD

  1. public static void main(final String[] args) throws Exception {
  2.     Query q = QueryFactory
  3.         .create("prefix  dbp:  <http://dbpedia.org/resource/> " + "prefix  dbp2: <http://dbpedia.org/ontology/> " + "select  ?thumbnail where  { dbp:total !dbp2:thumbnail ?thumbnail }");
  4.     TriplePatternExtractor triplePatternExtractor = new TriplePatternExtractor();
  5.     triplePatternExtractor.extractIngoingTriplePatterns(q, q.getProjectVars().get(0));
  6.   }
  7. }

代码示例来源：origin: dice-group/NLIWOD

  1. public Set<Triple> extractTriplePattern(final Query query, final boolean ignoreOptionals) {
  2.   triplePattern = new HashSet<>();
  3.   optionalTriplePattern = new HashSet<>();
  4.   query.getQueryPattern().visit(this);
  5.   // postprocessing: triplepattern in OPTIONAL clause
  6.   if (!ignoreOptionals && query.isSelectType()) {
  7.     for (Triple t : optionalTriplePattern) {
  8.       if (!ListUtils.intersection(new ArrayList<>(VarUtils.getVars(t)), query.getProjectVars()).isEmpty()) {
  9.         triplePattern.add(t);
  10.       }
  11.     }
  12.   }
  13.   return triplePattern;
  14. }

代码示例来源：origin: org.aksw.rdfunit/rdfunit-model

  1. private Optional<ResultAnnotation> getPathAnnotation() {
  2.   if (query.getResultVars().contains("path")) {
  3.     List<Var> vars = query.getProjectVars();
  4.     VarExprList vel = query.getProject();
  5.     return Optional.of(
  6.       createVariableAnnotation(SHACL.resultPath, "path"));
  7.   } else {
  8.     if (shape.getPath().isPresent()) {
  9.       return Optional.of(
  10.         createValueAnnotation(SHACL.resultPath, shape.getPath().get().getPathAsRdf()));
  11.     }
  12.   }
  13.   return Optional.empty();
  14. }

代码示例来源：origin: apache/jena

  1. @Override
  2.   public void build() {
  3.     if (query.getProject().getVars().isEmpty()) {
  4.       query.setQueryResultStar(true);
  5.     }
  6.     
  7.     aggHandler.build();
  8.     
  9.     // handle the SELECT * case
  10.     query.getProjectVars();
  11.   }
  12. }

代码示例来源：origin: org.apache.jena/jena-querybuilder

  1. @Override
  2.   public void build() {
  3.     if (query.getProject().getVars().isEmpty()) {
  4.       query.setQueryResultStar(true);
  5.     }
  6.     
  7.     aggHandler.build();
  8.     
  9.     // handle the SELECT * case
  10.     query.getProjectVars();
  11.   }
  12. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. public static List<String> getResult(QueryExecutionFactory qef, Query query) throws Exception{
  2.   return getResult(qef, query, query.getProjectVars().get(0));
  3. }

代码示例来源：origin: SmartDataAnalytics/jena-sparql-api

  1. default Query asQuery() {
  2.   Element e = getElement();
  3.   List<Var> vs = getVars();
  4.   
  5.   Query result = new Query();
  6.   result.setQuerySelectType();
  7.   result.setQueryPattern(getElement());
  8.   result.setDistinct(true);
  9.   
  10.   for(Var v : vs) {
  11.     result.getProjectVars().add(v);
  12.   }
  13.   return result;
  14. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. /**
  2.  * @return whether the target projection variable is used only in object position of a triple pattern
  3.  */
  4. public static Predicate<Question> isObjectTarget() {
  5.   return q -> utils.extractOutgoingTriplePatterns(
  6.       QueryFactory.create(q.getQuery().getSparql()),
  7.       QueryFactory.create(q.getQuery().getSparql()).getProjectVars().get(0).asNode()
  8.   ).isEmpty();
  9. }

代码示例来源：origin: SmartDataAnalytics/DL-Learner

  1. /**
  2.  * @return whether the target projection variable is used only in subject position of a triple pattern
  3.  */
  4. public static Predicate<Question> isSubjectTarget() {
  5.   return q -> utils.extractIncomingTriplePatterns(
  6.       QueryFactory.create(q.getQuery().getSparql()),
  7.       QueryFactory.create(q.getQuery().getSparql()).getProjectVars().get(0).asNode()
  8.   ).isEmpty();
  9. }

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