com.hp.hpl.jena.query.Query.addResultVar()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.addResultVar方法的一些代码示例，展示了Query.addResultVar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.addResultVar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：addResultVar

Query.addResultVar介绍

[英]Add an to a SELECT query (a name will be created for it)
[中]向SELECT查询中添加（将为其创建名称）

代码示例

代码示例来源：origin: Quetzal-RDF/quetzal

public void addResultVar(String var) {
  query.addResultVar(var);
}

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

/** Add a collection of projection variables to a SELECT query */
public void addProjectVars(Collection<?> vars)
{
  for ( Iterator<?> iter = vars.iterator() ; iter.hasNext() ; )
  {
    Object obj = iter.next();
    if ( obj instanceof String )
    {
      this.addResultVar((String)obj) ;
      continue ;
    }
    if ( obj instanceof Var )
    {
      this.addResultVar((Var)obj) ;
      continue ;
    }
    throw new QueryException("Not a variable or variable name: "+obj) ;
  }
  resultVarsSet = true ;
}

代码示例来源：origin: com.hp.hpl.jena/arq

/** Add a collection of projection variables to a SELECT query */
public void addProjectVars(Collection<?> vars)
{
  for ( Iterator<?> iter = vars.iterator() ; iter.hasNext() ; )
  {
    Object obj = iter.next();
    if ( obj instanceof String )
    {
      this.addResultVar((String)obj) ;
      continue ;
    }
    if ( obj instanceof Var )
    {
      this.addResultVar((Var)obj) ;
      continue ;
    }
    throw new QueryException("Not a variable or variable name: "+obj) ;
  }
  resultVarsSet = true ;
}

代码示例来源：origin: com.hp.hpl.jena/arq

private void extractVarList(Query q, RDQL_Node node)
{
  int n = node.jjtGetNumChildren() ;
  selectAllVars = ( n == 0 ) ;
  for ( int i = 0 ; i < n ; i++ )
  {
    RDQL_Node c = node.jjtGetChild(i) ;
    if ( ! (c instanceof Q_Var) )
      throw new ARQInternalErrorException("Internal error: parser created '"+c.getClass().getName()+"' when Q_Var expected") ;
    Q_Var v = (Q_Var)c ;
    q.addResultVar(v.varName) ;
  }
}

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

Query convert() {
  if (hasRun) {
    return this.query;
  } else {
    try {
      op.visit(this) ;
      
      Collection<Var> vars = this.projectVars;
      query.setQueryResultStar(vars.isEmpty());   // SELECT * unless we are projecting

      Iterator<Var> iter = vars.iterator();
      for (; iter.hasNext();) {
        Var var = iter.next();           
        if (this.varExpression.containsKey(var))
          query.addResultVar(var, this.varExpression.get(var));
        else
          query.addResultVar(var);
      }
      
      ElementGroup eg = this.currentGroup ;                   
      query.setQueryPattern(eg) ;
      query.setQuerySelectType() ;
      query.setResultVars() ;                     // Variables from the group.
      return query ; 
    } finally {
      this.hasRun = true;
    }
  }
}

代码示例来源：origin: com.hp.hpl.jena/arq

public static Query asQuery(Op op)
{
  Query query = QueryFactory.make() ;
  
  Converter v = new Converter(query) ;
  //OpWalker.walk(op, v) ;
  op.visit(v) ;
  
  List<Var> vars = v.projectVars;
  query.setQueryResultStar(vars.isEmpty()); // SELECT * unless we are projecting
  Iterator<Var> iter = vars.iterator();
  for (; iter.hasNext();) {
    Var var = iter.next();
    if (v.varExpression.containsKey(var))
      query.addResultVar(var, v.varExpression.get(var));
    else
      query.addResultVar(var);
  }
  
  ElementGroup eg = v.currentGroup ;
  query.setQueryPattern(eg) ;
  query.setQuerySelectType() ;
  
  query.setResultVars() ; 
  return query ; 
}

代码示例来源：origin: com.hp.hpl.jena/arq

private void findAndAddNamedVars()
{
  Iterator<Var> varIter = null ;
  if ( hasGroupBy() )
    varIter = groupVars.getVars().iterator() ;
  else
  {
    // Binding variables -- in patterns, not in filters and not in EXISTS
    LinkedHashSet<Var> queryVars = new LinkedHashSet<Var>() ;
    PatternVars.vars(queryVars, this.getQueryPattern()) ;
    if ( this.hasBindings() )
      queryVars.addAll(getBindingVariables()) ;
    
    varIter = queryVars.iterator() ;
  }
  
  // All query variables, including ones from bNodes in the query.
  
  for ( ; varIter.hasNext() ; )
  {
    Object obj = varIter.next() ;
    //Var var = (Var)iter.next() ;
    Var var = (Var)obj ;
    if ( var.isNamedVar() )
      addResultVar(var) ;
  }
}

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

private void findAndAddNamedVars()
  {
    Iterator<Var> varIter = null ;
    if ( hasGroupBy() )
      varIter = groupVars.getVars().iterator() ;
    else
    {
      // Binding variables -- in patterns, not in filters and not in EXISTS
      LinkedHashSet<Var> queryVars = new LinkedHashSet<Var>() ;
      PatternVars.vars(queryVars, this.getQueryPattern()) ;
      if ( this.hasValues() )
        queryVars.addAll(getValuesVariables()) ;
//            if ( this.hasValues() )
//                queryVars.addAll(getValuesVariables()) ;
      varIter = queryVars.iterator() ;
    }
    
    // All query variables, including ones from bNodes in the query.
    
    for ( ; varIter.hasNext() ; )
    {
      Object obj = varIter.next() ;
      //Var var = (Var)iter.next() ;
      Var var = (Var)obj ;
      if ( var.isNamedVar() )
        addResultVar(var) ;
    }
  }

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

public void addDescribeNode(Node node)
{
  if ( node.isVariable() ) { addResultVar(node) ; return ; }
  if ( node.isURI() || node.isBlank() )
  {
    if ( !resultNodes.contains(node) )
      resultNodes.add(node);
    return ;
  }
  if ( node.isLiteral() )
    throw new QueryException("Result node is a literal: "+FmtUtils.stringForNode(node)) ;
  throw new QueryException("Result node not recognized: "+node) ;
}

代码示例来源：origin: com.hp.hpl.jena/arq

private void extractVarOrURIList(Query q, RDQL_Node node)
{
  int n = node.jjtGetNumChildren() ;
  selectAllVars = ( n == 0 ) ;
  for ( int i = 0 ; i < n ; i++ )
  {
    RDQL_Node c = node.jjtGetChild(i) ;
    if ( c instanceof Q_Var )
    {
      Q_Var v = (Q_Var)c ;
      q.addResultVar(v.varName) ;
      continue ;
    }
    if ( ( c instanceof Q_URI ) || ( c instanceof Q_QName ) )
    {
      Q_URI v = (Q_URI)c ;
      
      q.addDescribeNode(v.getNode()) ;
      continue ;
    }
    throw new ARQInternalErrorException("Internal error: parser created '"+c.getClass().getName()+"' when Q_Var expected") ;
  }
}

代码示例来源：origin: com.hp.hpl.jena/arq

public void addDescribeNode(Node node)
{
  if ( node.isVariable() ) { addResultVar(node) ; return ; }
  if ( node.isURI() || node.isBlank() )
  {
    if ( !resultNodes.contains(node) )
      resultNodes.add(node);
    return ;
  }
  if ( node.isLiteral() )
    throw new QueryException("Result node is a literal: "+FmtUtils.stringForNode(node)) ;
  throw new QueryException("Result node not recognized: "+node) ;
}

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

q.addResultVar( var45 );

代码示例来源：origin: anno4j/anno4j

leftGroup.addElement(new ElementBind(subVar, new NodeValueNode(leftVar.asNode())));
leftSubQuery.setQueryPattern(leftGroup);
leftSubQuery.addResultVar(var);
leftSubQuery.addResultVar(subVar);
leftSubQuery.setQuerySelectType();
ElementSubQuery leftESubQuery = new ElementSubQuery(leftSubQuery);
rightGroup.addElement(new ElementBind(subVar, new NodeValueNode(rightVar.asNode())));
rightSubQuery.setQueryPattern(rightGroup);
rightSubQuery.addResultVar(var);
rightSubQuery.addResultVar(subVar);
rightSubQuery.setQuerySelectType();
ElementSubQuery rightESubQuery = new ElementSubQuery(rightSubQuery);

代码示例来源：origin: Quetzal-RDF/quetzal

public ConjunctiveQuery cloneConjQuery(boolean copyResultVars) {
  //return new ConjunctiveQuery(query.cloneQuery());
  
  ConjunctiveQuery ret = new ConjunctiveQuery();
  ElementTriplesBlock pattern = new ElementTriplesBlock();
  for (Triple t: getTriples()) {
    pattern.addTriple(new Triple(t.getSubject(), t.getPredicate(), t.getObject()));
  }
  ret.setQueryPattern(pattern);
  for (ElementFilter f: getFilters()) {
    ret.addFilter(f.getExpr());
  }
  if (copyResultVars) {
    for (String v: getResultVars()) {
      ret.query.addResultVar(v);
    }
  }
  return ret;
}
public Set<String> getAllVariables() {

代码示例来源：origin: Quetzal-RDF/quetzal

protected static Query ruleToQuery(RuleSystem rules, Rule rule,
    Map<Predicate, Query> headPred2Query, NewVariableGenerator varGen) {
  Query cq = new QueryWithRepeatedResultVars();
  cq.setQuerySelectType();
  for (Expr e: rule.getHead().getArguments()) {
     assert e.isVariable() : e;
     cq.addResultVar(((VariableExpr)e).getName());
    
  }
  ElementGroup group = new ElementGroup();
  cq.setQueryPattern(group);
  Set<VariableExpr> unboundVars = new HashSet<VariableExpr>(rule.getUnboundVariables());
  for (AtomicFormula af :rule.getBody()) {
     af = renameUnboundVariables(af, unboundVars, varGen);
     Predicate pred = af.getPredicate();
     Element elt;
     if (rules.isIDB(pred)) {
       Query conjunctQuery = getUnionQuery(rules,pred, headPred2Query, varGen);
       elt = instantiateBody(conjunctQuery, af.getArguments());
     } else {
       elt = instantiateBody( af, af.getArguments());
     }
     group.addElement(elt);
   }
   return cq;
}

代码示例来源：origin: anno4j/anno4j

public static <T extends ResourceObject> Query evaluate(QueryServiceConfiguration queryServiceDTO, URI rootType) throws ParseException {
  Query query = QueryFactory.make();
  query.setQuerySelectType();
  ElementGroup elementGroup = new ElementGroup();
  Var objectVar = Var.alloc("root");
  // Creating and adding the first triple - could be something like: "?objectVar rdf:type oa:Annotation
  Triple t1 = new Triple(objectVar, RDF.type.asNode(), NodeFactory.createURI(rootType.toString()));
  elementGroup.addTriplePattern(t1);
  // Evaluating the criteria
  for (Criteria c : queryServiceDTO.getCriteria()) {
    SesameValueBackend backend = new SesameValueBackend();
    LdPathParser parser = new LdPathParser(backend, queryServiceDTO.getConfiguration(), new StringReader(c.getLdpath()));
    Var var = LDPathEvaluator.evaluate(parser.parseSelector(queryServiceDTO.getPrefixes()), elementGroup, objectVar, queryServiceDTO.getEvaluatorConfiguration());
    if (c.getConstraint() != null) {
      String resolvedConstraint = resolveConstraintPrefix(c.getConstraint(), queryServiceDTO, parser);
      EvalComparison.evaluate(elementGroup, c, var, resolvedConstraint);
    }
  }
  // Adding all generated patterns to the query object
  query.setQueryPattern(elementGroup);
  // Choose what we want so select - SELECT ?annotation in this case
  query.addResultVar(objectVar);
  // Setting the default prefixes, like rdf: or dc:
  query.getPrefixMapping().setNsPrefixes(queryServiceDTO.getPrefixes());
  return query;
}

代码示例来源：origin: com.hp.hpl.jena/arq

q.addResultVar(varName) ;

代码示例来源：origin: com.hp.hpl.jena/arq

case VAR2:
 v = Var();
     getQuery().addResultVar(v) ;
 break;
case LPAREN:
 v = Var();
 jj_consume_token(RPAREN);
 getQuery().addResultVar(v, expr) ;
getQuery().setQueryResultStar(false) ;
 break;

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

while (true) {
 v = Var();
       getQuery().addResultVar(v) ;
getQuery().setQueryResultStar(false) ;
 switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {

代码示例来源：origin: com.hp.hpl.jena/arq

while (true) {
 v = Var();
       getQuery().addResultVar(v) ;
getQuery().setQueryResultStar(false) ;
 switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {

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