Class ExtendIteratorForSolMaps_OneVar

java.lang.Object

se.liu.ida.hefquin.base.data.utils.ExtendIteratorForSolMaps_OneVar

All Implemented Interfaces:

Iterator<SolutionMapping>

public class ExtendIteratorForSolMaps_OneVar
extends Object
implements Iterator<SolutionMapping>

This is an iterator of solution mappings that consumes another iterator and extends each of the solution mappings of that other iterator with a binding for an additional variable where the value for this variable is obtained by evaluating the given expression based on the input solution mapping. Any input solution mapping for which evaluating the expression produces an error is passed on as is (i.e., such a solution mapping is not extended). Hence, this iterator is a basis for implementing the BIND clause of SPARQL.

Field Summary

Fields

Modifier and Type	Field	Description
protected final org.apache.jena.sparql.expr.Expr	expr
protected final Iterator<SolutionMapping>	input
protected final org.apache.jena.sparql.core.Var	var

Constructor Summary

Constructors

Constructor	Description
ExtendIteratorForSolMaps_OneVar(Iterable<SolutionMapping> input, org.apache.jena.sparql.core.Var var, org.apache.jena.sparql.expr.Expr expr)
ExtendIteratorForSolMaps_OneVar(Iterator<SolutionMapping> input, org.apache.jena.sparql.core.Var var, org.apache.jena.sparql.expr.Expr expr)

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()
SolutionMapping	next()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Field Details

input

protected final Iterator<SolutionMapping> input

var

protected final org.apache.jena.sparql.core.Var var

expr

protected final org.apache.jena.sparql.expr.Expr expr

Constructor Details

ExtendIteratorForSolMaps_OneVar

public ExtendIteratorForSolMaps_OneVar(Iterator<SolutionMapping> input,
 org.apache.jena.sparql.core.Var var,
 org.apache.jena.sparql.expr.Expr expr)

ExtendIteratorForSolMaps_OneVar

public ExtendIteratorForSolMaps_OneVar(Iterable<SolutionMapping> input,
 org.apache.jena.sparql.core.Var var,
 org.apache.jena.sparql.expr.Expr expr)

Method Details

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<SolutionMapping>

next

public SolutionMapping next()

Specified by:

next in interface Iterator<SolutionMapping>