Class ExtendIteratorForSolMaps_MultipleVars

java.lang.Object

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

All Implemented Interfaces:

Iterator<SolutionMapping>

public class ExtendIteratorForSolMaps_MultipleVars
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 bindings for additional variables where the values for these variables are obtained by evaluating the given expressions based on the input solution mapping. If evaluating an expression based on an input solution mapping produces an error, then this solution mapping is not extended for the corresponding variable. 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.core.VarExprList	bindExpressions
protected final Iterator<SolutionMapping>	input

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected static org.apache.jena.sparql.expr.ExprList	createExprList(org.apache.jena.sparql.expr.Expr... bindExpressions)
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

bindExpressions

protected final org.apache.jena.sparql.core.VarExprList bindExpressions

Constructor Details

ExtendIteratorForSolMaps_MultipleVars

public ExtendIteratorForSolMaps_MultipleVars(Iterator<SolutionMapping> input,
 org.apache.jena.sparql.core.VarExprList bindExpressions)

ExtendIteratorForSolMaps_MultipleVars

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

ExtendIteratorForSolMaps_MultipleVars

public ExtendIteratorForSolMaps_MultipleVars(Iterable<SolutionMapping> input,
 org.apache.jena.sparql.core.VarExprList bindExpressions)

ExtendIteratorForSolMaps_MultipleVars

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

Method Details

createExprList

protected static org.apache.jena.sparql.expr.ExprList createExprList(org.apache.jena.sparql.expr.Expr... bindExpressions)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<SolutionMapping>

next

public SolutionMapping next()

Specified by:

next in interface Iterator<SolutionMapping>