com.hp.hpl.jena.query.Query.getResultVars()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com.hp.hpl.jena.query.Query.getResultVars方法的一些代码示例，展示了Query.getResultVars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.getResultVars方法的具体详情如下：
包路径：com.hp.hpl.jena.query.Query
类名称：Query
方法名：getResultVars

Query.getResultVars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: Quetzal-RDF/quetzal

public List<String> getResultVars() {
  return query.getResultVars();
}
public void addResultVar(String var) {

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

@Override
public void visitDescribeResultForm(Query query)
{
  x ^= query.getResultVars().hashCode() ;
  x ^= query.getResultURIs().hashCode() ;
}

代码示例来源：origin: com.hp.hpl.jena/arq

public void visitDescribeResultForm(Query query)
{
  x ^= query.getResultVars().hashCode() ;
  x ^= query.getResultURIs().hashCode() ;
}

代码示例来源：origin: fr.inria.eventcloud/eventcloud-core

public synchronized Set<Var> getResultVars() {
  if (this.resultVars == null) {
    this.resultVars = new HashSet<Var>();
    for (String varName : QueryFactory.create(this.sparqlQuery)
        .getResultVars()) {
      this.resultVars.add(Var.alloc(varName));
    }
  }
  return this.resultVars;
}

代码示例来源：origin: com.hp.hpl.jena/arq

/** Execute a query, expecting the result to be one row, one column.  Return that one RDFNode */
public static RDFNode getExactlyOne(String qs, Dataset ds)
{
  Query q = QueryFactory.create(qs) ;
  if ( q.getResultVars().size() != 1 )
    throw new ARQException("getExactlyOne: Must have exactly one result columns") ;
  String varname = q.getResultVars().get(0) ;
  QueryExecution qExec = QueryExecutionFactory.create(q, ds);
  return getExactlyOne(qExec, varname) ;
}

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

/** Execute a query, expecting the result to be one row, one column.  Return that one RDFNode */
public static RDFNode getExactlyOne(String qs, Dataset ds)
{
  Query q = QueryFactory.create(qs) ;
  if ( q.getResultVars().size() != 1 )
    throw new ARQException("getExactlyOne: Must have exactly one result columns") ;
  String varname = q.getResultVars().get(0) ;
  QueryExecution qExec = QueryExecutionFactory.create(q, ds);
  return getExactlyOne(qExec, varname) ;
}

代码示例来源：origin: org.semweb4j/rdf2go.impl.jena

public QueryResultTableImpl(Query query, Dataset jenaDataset) throws ModelRuntimeException {
  
  if(!query.isSelectType()) {
    throw new ModelRuntimeException("The given query is not a SELECT query");
  }
  // else
  this.varnames = new ArrayList<String>();
  for(Object o : query.getResultVars()) {
    this.varnames.add((String)o);
  }
  this.qexec = QueryExecutionFactory.create(query, jenaDataset);
}

代码示例来源：origin: org.semweb4j/rdf2go.impl.jena

public QueryResultTableImpl(Query query, Model jenaModel) throws ModelRuntimeException {
  
  if(!query.isSelectType()) {
    throw new ModelRuntimeException("The given query is not a SELECT query");
  }
  // else
  this.varnames = new ArrayList<String>();
  for(Object o : query.getResultVars()) {
    this.varnames.add((String)o);
  }
  this.qexec = QueryExecutionFactory.create(query, jenaModel);
}

代码示例来源：origin: Quetzal-RDF/quetzal

protected static Element instantiateBody(Query cq, List<? extends Expr> args ) {
  
  Map<Var, Node> oldVar2NewValue = new HashMap<Var, Node>();
  List<String> resultVars = cq.getResultVars();
  Set<String> alreadySeenVars = new HashSet<String>();
  
  assert resultVars.size() == args.size() : resultVars+", " +args	;
  for (int i=0;i<resultVars.size();i++) {
    String  old = resultVars.get(i);    
    if (alreadySeenVars.add(old)) {
      Expr newE = args.get(i);
      Node newN = toNode(newE);
      oldVar2NewValue.put(Var.alloc(old), newN);
    }        
  }
  VariableSubstitutionElementVisitor visitor = new VariableSubstitutionElementVisitor(oldVar2NewValue);
  cq.getQueryPattern().visit(visitor);
  Element result = visitor.getResult();
  return result;
}

代码示例来源：origin: org.semweb4j/rdf2go.impl.jena

public QueryResultTableImpl(QueryExecution qe) {
  if(!qe.getQuery().isSelectType()) {
    throw new ModelRuntimeException("The given query execution is not a SELECT query");
  }
  
  this.varnames = new ArrayList<String>();
  for(Object o : qe.getQuery().getResultVars()) {
    this.varnames.add((String)o);
  }
  this.qexec = qe;
}

代码示例来源：origin: com.hp.hpl.jena/arq

public void visitDescribeResultForm(Query query1)
{
  check("Not both DESCRIBE queries", query2.isDescribeType()) ;
  check("Result variables", 
     query1.getResultVars(), query2.getResultVars() ) ;
  check("Result URIs", 
     query1.getResultURIs(), query2.getResultURIs() ) ;
  
}

代码示例来源：origin: com.hp.hpl.jena/arq

private ResultSet asResultSet(QueryIterator qIter)
{
  Model model = null ;
  if ( dataset != null )
    model = dataset.getDefaultModel() ;
  else
    model = ModelFactory.createDefaultModel() ;
  
  ResultSetStream rStream = new ResultSetStream(query.getResultVars(), model, qIter) ;
  return rStream ;
}

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

@Override
public void visitDescribeResultForm(Query query1)
{
  check("Not both DESCRIBE queries", query2.isDescribeType()) ;
  check("Result variables", 
     query1.getResultVars(), query2.getResultVars() ) ;
  check("Result URIs", 
     query1.getResultURIs(), query2.getResultURIs() ) ;
  
}

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

private ResultSet asResultSet(QueryIterator qIter)
{
  Model model = null ;
  if ( dataset != null )
    model = dataset.getDefaultModel() ;
  else
    model = ModelFactory.createDefaultModel() ;
  
  ResultSetStream rStream = new ResultSetStream(query.getResultVars(), model, qIter) ;
  return rStream ;
}

代码示例来源：origin: com.hp.hpl.jena/arq

public void visitDescribeResultForm(Query query)
{
  out.print("DESCRIBE ") ;
  
  if ( query.isQueryResultStar() )
    out.print("*") ;
  else
  {
    appendVarList(query, out, query.getResultVars()) ;
    if ( query.getResultVars().size() > 0 &&
       query.getResultURIs().size() > 0 )
      out.print(" ") ;
    appendURIList(query, out, query.getResultURIs()) ;
  }
  out.newline() ;
}

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

@Override
public void visitDescribeResultForm(Query query)
{
  out.print("DESCRIBE ") ;
  
  if ( query.isQueryResultStar() )
    out.print("*") ;
  else
  {
    appendVarList(query, out, query.getResultVars()) ;
    if ( query.getResultVars().size() > 0 &&
       query.getResultURIs().size() > 0 )
      out.print(" ") ;
    appendURIList(query, out, query.getResultURIs()) ;
  }
  out.newline() ;
}

代码示例来源：origin: fr.lirmm.graphik/graal-io-sparql

private void execute(String queryString) {
  this.prefixes = new LinkedList<Prefix>();
  List<Term> ans = new LinkedList<Term>();
  Query sparql = QueryFactory.create(queryString);
  for (Map.Entry<String, String> e : sparql.getPrefixMapping().getNsPrefixMap().entrySet()) {
    this.prefixes.add(new Prefix(e.getKey(), e.getValue()));
  }
  if (sparql.isSelectType()) {
    for (String v : sparql.getResultVars()) {
      ans.add(DefaultTermFactory.instance().createVariable(v));
    }
  }
  ElementVisitorImpl visitor = new ElementVisitorImpl(DefaultAtomSetFactory.instance().create());
  sparql.getQueryPattern().visit(visitor);
  
  // check if answer variables appear in the query body
  Set<Variable> bodyVars = visitor.getAtomSet().getVariables();
  for(Term t : ans) {
    if(t.isVariable() && !bodyVars.contains(t)) {
      throw new ParseError("The variable ["+ t +"] of the answer list does not appear in the query body.");
    }
  }
  this.query = DefaultConjunctiveQueryFactory.instance().create(visitor.getAtomSet(), ans);
}

代码示例来源：origin: com.github.ansell.pellet/pellet-query

return parse( triples, sparql.getResultVars(), kb, sparql.isDistinct() );

代码示例来源：origin: Quetzal-RDF/quetzal

/**
 * returns all variables mentioned in a query
 * @param query
 * @return
 */
public static Set<Var> getAllVariables(Query query) {
    Set<Var> vars=  getAllVariables(query.getQueryPattern());
    if (query.hasGroupBy() && query.getGroupBy()!=null && query.getGroupBy().getExprs()!=null) {
      for (Map.Entry<Var, Expr> e: query.getGroupBy().getExprs().entrySet()) {
        vars.add(e.getKey());
        ExprVars.varsMentioned(vars, e.getValue());
      }
    }
    if (query.hasHaving() && query.getHavingExprs()!=null) {
      for (Expr e: query.getHavingExprs()) {
        ExprVars.varsMentioned(vars, e);
      }
    }
    
    if (query.hasAggregators() && query.getAggregators()!=null) {
      for (ExprAggregator e: query.getAggregators()) {
        ExprVars.varsMentioned(vars, e);
      }
    }
    for (String v: query.getResultVars()) {
      vars.add(Var.alloc(v));
    }
    return vars;
}

代码示例来源：origin: org.apache.clerezza.ext/org.apache.jena.jena-arq

for ( String varName : query.getResultVars() )

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