ai.grakn.graql.internal.reasoner.query

Class QueryAnswerIterator

java.lang.Object

ai.grakn.graql.internal.reasoner.query.QueryAnswerIterator

All Implemented Interfaces:

Iterator<Map<VarName,Concept>>

public class QueryAnswerIterator
extends Object
implements Iterator<Map<VarName,Concept>>

Iterator for query answers maintaining the iterative behaviour of QSQ scheme.

Author:

Kasper Piskorski

Constructor Summary

Constructors

Constructor and Description
QueryAnswerIterator(ReasonerAtomicQuery q, boolean materialise)

Method Summary

Modifier and Type	Method and Description
boolean	hasNext() check whether answers available, if answers not fully computed compute more answers
java.util.stream.Stream<Map<VarName,Concept>>	hasStream()
Map<VarName,Concept>	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

Constructor Detail

QueryAnswerIterator

public QueryAnswerIterator(ReasonerAtomicQuery q,
                           boolean materialise)

Method Detail

hasStream

public java.util.stream.Stream<Map<VarName,Concept>> hasStream()

Returns:

stream constructed out of the answer iterator

hasNext

public boolean hasNext()

check whether answers available, if answers not fully computed compute more answers

Specified by:

hasNext in interface Iterator<Map<VarName,Concept>>

Returns:

true if answers available

next

public Map<VarName,Concept> next()

Specified by:

next in interface Iterator<Map<VarName,Concept>>

Returns:

single answer to the query