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

Query.setQueryResultStar介绍

[英]Set whether the query had SELECT/DESCRIBE
[中]设置查询是否已选择/描述

代码示例

代码示例来源：origin: apache/jena

  1. /**
  2.  * Add a variable to the select. If the variable is <code>null</code> the
  3.  * variables are set to star.
  4.  * 
  5.  * @param var
  6.  *            The variable to add.
  7.  */
  8. public void addVar(Var var) {
  9.   if (var == null) {
  10.     query.setQueryResultStar(true);
  11.   } else {
  12.     query.setQueryResultStar(false);
  13.     query.addResultVar(var);
  14.   }
  15. }

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

  1. /**
  2.  * Add a variable to the select. If the variable is <code>null</code> the
  3.  * variables are set to star.
  4.  * 
  5.  * @param var
  6.  *            The variable to add.
  7.  */
  8. public void addVar(Var var) {
  9.   if (var == null) {
  10.     query.setQueryResultStar(true);
  11.   } else {
  12.     query.setQueryResultStar(false);
  13.     query.addResultVar(var);
  14.   }
  15. }

代码示例来源：origin: apache/jena

  1. /**
  2.  * Add an Expression as variable to the select.
  3.  * 
  4.  * @param expr
  5.  *            The expression to add.
  6.  * @param var
  7.  *            The variable to add.
  8.  */
  9. public void addVar(Expr expr, Var var) {
  10.   if (expr == null) {
  11.     throw new IllegalArgumentException("expr may not be null");
  12.   }
  13.   if (var == null) {
  14.     throw new IllegalArgumentException("var may not be null");
  15.   }
  16.   query.setQueryResultStar(false);
  17.   query.addResultVar(var, expr);
  18.   aggHandler.add( expr, var );
  19. }

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

  1. /**
  2.  * Add an Expression as variable to the select.
  3.  * 
  4.  * @param expr
  5.  *            The expression to add.
  6.  * @param var
  7.  *            The variable to add.
  8.  */
  9. public void addVar(Expr expr, Var var) {
  10.   if (expr == null) {
  11.     throw new IllegalArgumentException("expr may not be null");
  12.   }
  13.   if (var == null) {
  14.     throw new IllegalArgumentException("var may not be null");
  15.   }
  16.   query.setQueryResultStar(false);
  17.   query.addResultVar(var, expr);
  18.   aggHandler.add( expr, var );
  19. }

代码示例来源：origin: apache/jena

  1. private static Query toQuery(Element pattern) {
  2.   Query query = QueryFactory.make() ;
  3.   query.setQueryPattern(pattern) ;
  4.   query.setQuerySelectType() ;
  5.   query.setQueryResultStar(true) ;
  6.   return query ;
  7. }

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: apache/jena

  1. protected Query elementToQuery(Element pattern) {
  2.   if ( pattern == null )
  3.     return null;
  4.   Query query = new Query();
  5.   query.setQueryPattern(pattern);
  6.   query.setQuerySelectType();
  7.   query.setQueryResultStar(true);
  8.   query.setResultVars();
  9.   return query;
  10. }

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

  1. public static Query asQuery(Op op, Dialect dialect)
  2. {
  3.   Query query = QueryFactory.make() ;
  4.   Converter v = new Converter(query, dialect) ;
  5.   //OpWalker.walk(op, v) ;
  6.   op.visit(v) ;
  7.   List<Var> vars = v.projectVars;
  8.   query.setQueryResultStar(vars.isEmpty()); // SELECT * unless we are projecting
  9.   Iterator<Var> iter = vars.iterator();
  10.   for (; iter.hasNext();) {
  11.     Var var = iter.next();
  12.     if (v.varExpression.containsKey(var))
  13.       query.addResultVar(var, v.varExpression.get(var));
  14.     else
  15.       query.addResultVar(var);
  16.   }
  17.   ElementGroup eg = v.currentGroup ;
  18.   query.setQueryPattern(eg) ;
  19.   query.setQuerySelectType() ;
  20.   query.setResultVars() ;
  21.   return query ;
  22. }

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

  1. public static Query wrapAsSubQuery(Query query) {
  2.   Element esq = new ElementSubQuery(query);
  3.   Query result = new Query();
  4.   result.setQuerySelectType();
  5.   result.setQueryResultStar(true);
  6.   result.setQueryPattern(esq);
  7.   return result;
  8. }

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

  1. private Iterator<Triple> executeConstructStreaming(Query query) {
  2.   if (!query.isConstructType()) {
  3.     throw new RuntimeException("CONSTRUCT query expected. Got: ["
  4.         + query.toString() + "]");
  5.   }
  6.   Query clone = query.cloneQuery();
  7.   clone.setQuerySelectType();
  8.   //Query selectQuery = QueryUtils.elementToQuery(query.getQueryPattern());
  9.   clone.setQueryResultStar(true);
  10.   ResultSetCloseable rs = executeCoreSelect(clone);
  11.   System.out.println("Executing query as: " + clone);
  12.   // insertPrefixesInto(result) ;
  13.   Template template = query.getConstructTemplate();
  14.   Iterator<Triple> result = new ConstructIterator(template, rs);
  15.   return result;
  16. }

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

  1. public static Element limitElement(Element e, long limit) {
  2.   Query subQuery = new Query();
  3.   subQuery.setQuerySelectType();
  4.   subQuery.setQueryResultStar(true);
  5.   subQuery.setQueryPattern(e);
  6.   subQuery.setLimit(limit);
  7.   Element result = new ElementSubQuery(subQuery);
  8.   return result;
  9. }

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

  1. public static Element limitElement(Element e, long limit) {
  2.   Query subQuery = new Query();
  3.   subQuery.setQuerySelectType();
  4.   subQuery.setQueryResultStar(true);
  5.   subQuery.setQueryPattern(e);
  6.   subQuery.setLimit(limit);
  7.   Element result = new ElementSubQuery(subQuery);
  8.   return result;
  9. }

代码示例来源：origin: apache/jena

  1. @Override
  2. public Iterator<Quad> execConstructQuads() {
  3.   checkNotClosed();
  4.   if ( ! query.isConstructType() )
  5.     throw new QueryExecException("Attempt to get a CONSTRUCT model from a "+labelForQuery(query)+" query") ;
  6.   // This causes there to be no PROJECT around the pattern.
  7.   // That in turn, exposes the initial bindings.  
  8.   query.setQueryResultStar(true) ;
  9.   startQueryIterator() ;
  10.   
  11.   Template template = query.getConstructTemplate() ;
  12.   return TemplateLib.calcQuads(template.getQuads(), queryIterator);
  13. }

代码示例来源：origin: apache/jena

  1. @Override
  2. public Iterator<Triple> execConstructTriples() {
  3.   checkNotClosed();
  4.   if ( ! query.isConstructType() )
  5.     throw new QueryExecException("Attempt to get a CONSTRUCT model from a "+labelForQuery(query)+" query") ;
  6.   // This causes there to be no PROJECT around the pattern.
  7.   // That in turn, exposes the initial bindings.  
  8.   query.setQueryResultStar(true) ;
  9.   startQueryIterator() ;
  10.   
  11.   Template template = query.getConstructTemplate() ;
  12.   return TemplateLib.calcTriples(template.getTriples(), queryIterator);
  13. }

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

  1. @Deprecated // Remove once countQuery works as espected
  2. public static long countQueryOld(Query query, QueryExecutionFactory qef) {
  3.   Var outputVar = Var.alloc("_c_");
  4.   if(query.isConstructType()) {
  5.     Element element = query.getQueryPattern();
  6.     query = new Query();
  7.     query.setQuerySelectType();
  8.     query.setQueryResultStar(true);
  9.     query.setQueryPattern(element);
  10.   }
  11.   Query countQuery = QueryFactory.create("Select (Count(*) As ?_c_) { {" + query + "} }", Syntax.syntaxSPARQL_11);
  12.   QueryExecution qe = qef.createQueryExecution(countQuery);
  13.   ResultSet rs = qe.execSelect();
  14.   Binding binding = rs.nextBinding();
  15.   Node node = binding.get(outputVar);
  16.   Number numeric = (Number)node.getLiteralValue();
  17.   long result = numeric.longValue();
  18.   return result;
  19. }

代码示例来源：origin: apache/jena

  1. @Override
  2. public void startVisit(Query query) {
  3.   newQuery.setSyntax(query.getSyntax());
  4.   if (query.explicitlySetBaseURI())
  5.     newQuery.setBaseURI(query.getPrologue().getResolver());
  6.   newQuery.setQueryResultStar(query.isQueryResultStar());
  7.   if (query.hasDatasetDescription()) {
  8.     DatasetDescription desc = query.getDatasetDescription();
  9.     for (String x : desc.getDefaultGraphURIs())
  10.       newQuery.addGraphURI(x);
  11.     for (String x : desc.getDefaultGraphURIs())
  12.       newQuery.addNamedGraphURI(x);
  13.   }
  14.   // Aggregators.
  15.   newQuery.getAggregators().addAll(query.getAggregators());
  16. }

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

  1. @Override
  2. public void startVisit(Query query) {
  3.   newQuery.setSyntax(query.getSyntax()) ;
  4.   if ( query.explicitlySetBaseURI() )
  5.     newQuery.setBaseURI(query.getPrologue().getResolver()) ;
  6.   newQuery.setQueryResultStar(query.isQueryResultStar()) ;
  7.   if ( query.hasDatasetDescription() ) {
  8.     DatasetDescription desc = query.getDatasetDescription() ;
  9.     for (String x : desc.getDefaultGraphURIs())
  10.       newQuery.addGraphURI(x) ;
  11.     for (String x : desc.getDefaultGraphURIs())
  12.       newQuery.addNamedGraphURI(x) ;
  13.   }
  14.   // Aggregators.
  15.   newQuery.getAggregators().addAll(query.getAggregators()) ;
  16. }

代码示例来源：origin: apache/jena

  1. /**
  2.  * Add all the variables from the select handler variable.
  3.  * 
  4.  * @param selectHandler
  5.  *            The select handler to copy the variables from.
  6.  */
  7. public void addAll(SelectHandler selectHandler) {
  8.   setReduced(selectHandler.query.isReduced());
  9.   setDistinct(selectHandler.query.isDistinct());
  10.   query.setQueryResultStar(selectHandler.query.isQueryResultStar());
  11.   VarExprList shProjectVars = selectHandler.query.getProject();
  12.   VarExprList qProjectVars = query.getProject();
  13.   for (Var var : shProjectVars.getVars()) {
  14.     // make sure there are no duplicates
  15.     if (!qProjectVars.contains(var)) {
  16.       qProjectVars.add(var, shProjectVars.getExpr(var));
  17.     }
  18.   }
  19.   aggHandler.addAll( selectHandler.aggHandler );
  20. }

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

  1. /**
  2.  * Add all the variables from the select handler variable.
  3.  * 
  4.  * @param selectHandler
  5.  *            The select handler to copy the variables from.
  6.  */
  7. public void addAll(SelectHandler selectHandler) {
  8.   setReduced(selectHandler.query.isReduced());
  9.   setDistinct(selectHandler.query.isDistinct());
  10.   query.setQueryResultStar(selectHandler.query.isQueryResultStar());
  11.   VarExprList shProjectVars = selectHandler.query.getProject();
  12.   VarExprList qProjectVars = query.getProject();
  13.   for (Var var : shProjectVars.getVars()) {
  14.     // make sure there are no duplicates
  15.     if (!qProjectVars.contains(var)) {
  16.       qProjectVars.add(var, shProjectVars.getExpr(var));
  17.     }
  18.   }
  19.   aggHandler.addAll( selectHandler.aggHandler );
  20. }

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