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

/**
 * Get the list of variables from the query.
 * 
 * @return The list of variables in the query.
 */
public List<Var> getVars() {
  return query.getProjectVars();
}

代码示例来源：origin: apache/jena

/**
 * Get the list of variables from the query.
 * 
 * @return The list of variables in the query.
 */
public List<Var> getVars() {
  return query.getProjectVars();
}

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

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

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

/**
 * Returns triple patterns for each projection variable v such that v is in subject position.
 * @param query The SPARQL query.
 * @return
 */
public Map<Var,Set<Triple>> extractIncomingTriplePatternsForProjectionVars(Query query){
  Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  for (Var var : query.getProjectVars()) {
    Set<Triple> triplePatterns = new HashSet<>(extractIncomingTriplePatterns(query, var));
    var2TriplePatterns.put(var, triplePatterns);
  }
  return var2TriplePatterns;
}

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

/**
 * Returns triple patterns for each projection variable v such that v is in subject position.
 * @param query The SPARQL query.
 * @return
 */
public Map<Var,Set<Triple>> extractOutgoingTriplePatternsForProjectionVars(Query query){
  Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  for (Var var : query.getProjectVars()) {
    Set<Triple> triplePatterns = new HashSet<>(extractOutgoingTriplePatterns(query, var));
    var2TriplePatterns.put(var, triplePatterns);
  }
  return var2TriplePatterns;
}

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

/**
 * Returns triple patterns for each projection variable v such that v is in object position.
 * @param query The SPARQL query.
 * @return
 */
public Map<Var,Set<Triple>> extractIngoingTriplePatternsForProjectionVars(Query query){
  Map<Var,Set<Triple>> var2TriplePatterns = new HashMap<>();
  for (Var var : query.getProjectVars()) {
    Set<Triple> triplePatterns = new HashSet<>(extractIncomingTriplePatterns(query, var));
    var2TriplePatterns.put(var, triplePatterns);
  }
  return var2TriplePatterns;
}

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

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

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

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

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

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

代码示例来源：origin: SmartDataAnalytics/Sparqlify

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

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

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

代码示例来源：origin: dice-group/NLIWOD

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

代码示例来源：origin: dice-group/NLIWOD

public Set<Triple> extractTriplePattern(final Query query, final boolean ignoreOptionals) {
  triplePattern = new HashSet<>();
  optionalTriplePattern = new HashSet<>();
  query.getQueryPattern().visit(this);
  // postprocessing: triplepattern in OPTIONAL clause
  if (!ignoreOptionals && query.isSelectType()) {
    for (Triple t : optionalTriplePattern) {
      if (!ListUtils.intersection(new ArrayList<>(VarUtils.getVars(t)), query.getProjectVars()).isEmpty()) {
        triplePattern.add(t);
      }
    }
  }
  return triplePattern;
}

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

private Optional<ResultAnnotation> getPathAnnotation() {
  if (query.getResultVars().contains("path")) {
    List<Var> vars = query.getProjectVars();
    VarExprList vel = query.getProject();
    return Optional.of(
      createVariableAnnotation(SHACL.resultPath, "path"));
  } else {
    if (shape.getPath().isPresent()) {
      return Optional.of(
        createValueAnnotation(SHACL.resultPath, shape.getPath().get().getPathAsRdf()));
    }
  }
  return Optional.empty();
}

代码示例来源：origin: apache/jena

@Override
  public void build() {
    if (query.getProject().getVars().isEmpty()) {
      query.setQueryResultStar(true);
    }
    
    aggHandler.build();
    
    // handle the SELECT * case
    query.getProjectVars();
  }
}

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

@Override
  public void build() {
    if (query.getProject().getVars().isEmpty()) {
      query.setQueryResultStar(true);
    }
    
    aggHandler.build();
    
    // handle the SELECT * case
    query.getProjectVars();
  }
}

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

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

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

default Query asQuery() {
  Element e = getElement();
  List<Var> vs = getVars();
  
  Query result = new Query();
  result.setQuerySelectType();
  result.setQueryPattern(getElement());
  result.setDistinct(true);
  
  for(Var v : vs) {
    result.getProjectVars().add(v);
  }
  return result;
}

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

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

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

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