本文整理了Java中org.apache.jena.sparql.engine.binding.Binding.isEmpty()方法的一些代码示例，展示了Binding.isEmpty()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。Binding.isEmpty()方法的具体详情如下：
包路径：org.apache.jena.sparql.engine.binding.Binding
类名称：Binding
方法名：isEmpty

Binding.isEmpty介绍

[英]Is this an empty binding? No variables.
[中]这是空的装订吗？没有变量。

代码示例

代码示例来源：origin: apache/jena

private static boolean isNotNeeded(Binding b) {
  return b == null || b.isEmpty();
}

代码示例来源：origin: apache/jena

@Override
  public boolean isJoinIdentity() { return binding.isEmpty(); }
}

代码示例来源：origin: apache/jena

@Override
public boolean isEmpty()    { return binding.isEmpty() ; }

代码示例来源：origin: apache/jena

@Override
  protected boolean isEmpty1() {
    if ( binding.isEmpty() )
      return true ;
    if ( size1() == 0 )
      return true ;
    return false ;
  }
}

代码示例来源：origin: apache/jena

@Override
public boolean isEmpty() {
  if ( !isEmpty1() )
    return false;
  if ( parent == null )
    return true;
  return parent.isEmpty();
}

代码示例来源：origin: apache/jena

@Override
  public Binding convert(Binding b)
  {
    if ( parentBinding == null || parentBinding.isEmpty() )
      return b ;
  
    // This is the result.  Could have BindingBase.setParent etc.  
    BindingMap b2 = BindingFactory.create(parentBinding) ;
    // Copy the resultSet bindings to the combined result binding with checking. 
    for ( Iterator<Var> iter = b.vars() ; iter.hasNext(); )
    {
      Var v = iter.next();
      Node n = b.get(v) ;
      if ( b2.contains(v) )
      {
        Node n2 = b2.get(v) ;
        if ( n2.equals(n) )
          Log.warn(this, "Binding already for "+v+" (same value)" ) ;
        else
        {
          Log.error(this, "Binding already for "+v+" (different values)" ) ;
          throw new ARQInternalErrorException("Incompatible bindings for "+v) ;
        }
      }
      b2.add(v, n) ;
    }
    return b2 ;
  }
}

代码示例来源：origin: apache/jena

protected Plan createPlan()
{
  // Decide the algebra to actually execute.
  Op op = queryOp ;
  if ( ! startBinding.isEmpty() ) {
    op = Substitute.substitute(op, startBinding) ;
    context.put(ARQConstants.sysCurrentAlgebra, op) ;
    // Don't reset the startBinding because it also is
    // needed in the output.
  }
  op = modifyOp(op) ;
  QueryIterator queryIterator = null ;
  if ( dataset != null )
    // Null means setting up but not executing a query.
    queryIterator = evaluate(op, dataset, startBinding, context) ;
  else
    // Bypass management interface
    queryIterator = evaluateNoMgt(op, dataset, startBinding, context) ;
  // This could be an automagic iterator to catch close.
  return new PlanOp(getOp(), this, queryIterator) ;
}

代码示例来源：origin: apache/jena

@Override
public QueryIterator eval(Op op, DatasetGraph dsg, Binding input, Context context)
{
  ExecutionContext execCxt = new ExecutionContext(context, dsg.getDefaultGraph(), dsg, QC.getFactory(context)) ;
  QueryIterator qIter1 = 
    ( input.isEmpty() ) ? QueryIterRoot.create(execCxt) 
              : QueryIterRoot.create(input, execCxt);
  QueryIterator qIter = QC.execute(op, qIter1, execCxt) ;
  // Wrap with something to check for closed iterators.
  qIter = QueryIteratorCheck.check(qIter, execCxt) ;
  // Need call back.
  if ( context.isTrue(ARQ.enableExecutionTimeLogging) )
    qIter = QueryIteratorTiming.time(qIter) ;
  return qIter ;
}

代码示例来源：origin: apache/jena

if ( lastBinding.isEmpty() )
  return TableFactory.createUnit() ;

代码示例来源：origin: apache/jena

public static Op compile(Store store, Op op, Binding binding, Context context, SDBRequest request)
  if ( binding != null && ! binding.isEmpty() )
    op = Substitute.substitute(op, binding) ;