org.apache.jena.sparql.engine.index

Class HashIndexTable

java.lang.Object

org.apache.jena.sparql.engine.index.HashIndexTable

All Implemented Interfaces:

IndexTable

public class HashIndexTable
extends Object
implements IndexTable

Indexes bindings so that they can be search for quickly when a binding to all the variables is provided. If a binding to only some of the known variables is provided then the index still works, but will search linearly.

Constructor Summary

Constructors

Constructor and Description
HashIndexTable(Set<Var> commonVars, QueryIterator data)

Method Summary

Modifier and Type	Method and Description
boolean	containsCompatibleWithSharedDomain(Binding binding) Is there a binding in the table that has a shared domain (variables in common) and is join-compatible? This is teh condition for MINUS to exclude the argument binding.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

HashIndexTable

public HashIndexTable(Set<Var> commonVars,
                      QueryIterator data)
               throws org.apache.jena.sparql.engine.index.HashIndexTable.MissingBindingException

Throws:

org.apache.jena.sparql.engine.index.HashIndexTable.MissingBindingException

Method Detail

toString

public String toString()

Overrides:

toString in class Object

containsCompatibleWithSharedDomain

public boolean containsCompatibleWithSharedDomain(Binding binding)

Description copied from interface: IndexTable

Is there a binding in the table that has a shared domain (variables in common) and is join-compatible? This is teh condition for MINUS to exclude the argument binding.

Specified by:

containsCompatibleWithSharedDomain in interface IndexTable