Package se.liu.ida.hefquin.base.datastructures.impl

Class SolutionMappingsIndexNoJoinVars

java.lang.Object

se.liu.ida.hefquin.base.datastructures.impl.SolutionMappingsIndexBase

se.liu.ida.hefquin.base.datastructures.impl.SolutionMappingsIndexNoJoinVars

All Implemented Interfaces:

Iterable<SolutionMapping>, Collection<SolutionMapping>, SolutionMappingsIndex, StatsProvider

public class SolutionMappingsIndexNoJoinVars
extends SolutionMappingsIndexBase

This is a special implementation of SolutionMappingsIndex that can be used for cases in which ALL indexed solution mappings should be returned as join partners. This is useful for joins between subpatterns that do not have any variable in common (i.e., no join variables).

Field Summary

Fields

Modifier and Type	Field	Description
protected final List<SolutionMapping>	indexedSolMaps

Constructor Summary

Constructors

Constructor	Description
SolutionMappingsIndexNoJoinVars()

Method Summary

Modifier and Type	Method	Description
boolean	add(SolutionMapping sm)
void	clear()
boolean	contains(Object obj)
Iterable<SolutionMapping>	findSolutionMappings(org.apache.jena.sparql.core.Var var, org.apache.jena.graph.Node value)	Returns an iterator over all solution mappings in this index that map the given variable to the given value.
Iterable<SolutionMapping>	findSolutionMappings(org.apache.jena.sparql.core.Var var1, org.apache.jena.graph.Node value1, org.apache.jena.sparql.core.Var var2, org.apache.jena.graph.Node value2)	Returns an iterator over all solution mappings in this index that map the first variable to the first value and the second variable to the second value.
Iterable<SolutionMapping>	findSolutionMappings(org.apache.jena.sparql.core.Var var1, org.apache.jena.graph.Node value1, org.apache.jena.sparql.core.Var var2, org.apache.jena.graph.Node value2, org.apache.jena.sparql.core.Var var3, org.apache.jena.graph.Node value3)	This method is a three-variables version of the method SolutionMappingsIndex.findSolutionMappings(Var, Node).
Iterable<SolutionMapping>	getAllSolutionMappings()	Returns all solution mappings currently in this index.
Iterable<SolutionMapping>	getJoinPartners(SolutionMapping sm)	Returns an iterator over all solution mappings in this index that are compatible with the given solution mappings.
boolean	isEmpty()
int	size()

Methods inherited from class se.liu.ida.hefquin.base.datastructures.impl.SolutionMappingsIndexBase

addAll, containsAll, findSolutionMappingsLastResort, findSolutionMappingsLastResort, findSolutionMappingsLastResort, getStats, remove, removeAll, resetStats, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

equals, hashCode, parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface se.liu.ida.hefquin.base.datastructures.SolutionMappingsIndex

iterator

Field Details

indexedSolMaps

protected final List<SolutionMapping> indexedSolMaps

Constructor Details

SolutionMappingsIndexNoJoinVars

public SolutionMappingsIndexNoJoinVars()

Method Details

add

public boolean add(SolutionMapping sm)

getJoinPartners

public Iterable<SolutionMapping> getJoinPartners(SolutionMapping sm)
                                          throws UnsupportedOperationException

Description copied from interface: SolutionMappingsIndex

Returns an iterator over all solution mappings in this index that are compatible with the given solution mappings. Implementations may choose to support this method only for specific types of solution mappings (e.g., with specific variables), in which case an UnsupportedOperationException will be thrown if the method is called with an unsupported variable.

Throws:

UnsupportedOperationException

findSolutionMappings

public Iterable<SolutionMapping> findSolutionMappings(org.apache.jena.sparql.core.Var var,
 org.apache.jena.graph.Node value)
                                               throws UnsupportedOperationException

Description copied from interface: SolutionMappingsIndex

Returns an iterator over all solution mappings in this index that map the given variable to the given value. Implementations may choose to support this method only for specific variables, in which case an UnsupportedOperationException will be thrown if the method is called with an unsupported variable. The result of this method should essentially be the same as the result of calling SolutionMappingsIndex.getJoinPartners(SolutionMapping) with a solution mapping that is defined only for the given variable and that maps this variable to the given value.

Throws:

UnsupportedOperationException

findSolutionMappings

public Iterable<SolutionMapping> findSolutionMappings(org.apache.jena.sparql.core.Var var1,
 org.apache.jena.graph.Node value1,
 org.apache.jena.sparql.core.Var var2,
 org.apache.jena.graph.Node value2)
                                               throws UnsupportedOperationException

Description copied from interface: SolutionMappingsIndex

Returns an iterator over all solution mappings in this index that map the first variable to the first value and the second variable to the second value. Hence, this method is a two-variables version of the method SolutionMappingsIndex.findSolutionMappings(Var, Node).

Throws:

UnsupportedOperationException

findSolutionMappings

public Iterable<SolutionMapping> findSolutionMappings(org.apache.jena.sparql.core.Var var1,
 org.apache.jena.graph.Node value1,
 org.apache.jena.sparql.core.Var var2,
 org.apache.jena.graph.Node value2,
 org.apache.jena.sparql.core.Var var3,
 org.apache.jena.graph.Node value3)
                                               throws UnsupportedOperationException

Description copied from interface: SolutionMappingsIndex

This method is a three-variables version of the method SolutionMappingsIndex.findSolutionMappings(Var, Node).

Throws:

UnsupportedOperationException

getAllSolutionMappings

public Iterable<SolutionMapping> getAllSolutionMappings()

Description copied from interface: SolutionMappingsIndex

Returns all solution mappings currently in this index.

clear

public void clear()

contains

public boolean contains(Object obj)

isEmpty

public boolean isEmpty()

size

public int size()