Package org.infinispan.query.core.impl

Class EmptyResultQuery<T>

java.lang.Object

org.infinispan.query.dsl.impl.BaseQuery<T>

org.infinispan.query.core.impl.BaseEmbeddedQuery<T>

org.infinispan.query.core.impl.EmptyResultQuery<T>

All Implemented Interfaces:

Iterable<T>, org.infinispan.query.dsl.PaginationContext<org.infinispan.query.dsl.Query<T>>, org.infinispan.query.dsl.ParameterContext<org.infinispan.query.dsl.Query<T>>, org.infinispan.query.dsl.Query<T>

public final class EmptyResultQuery<T>
extends BaseEmbeddedQuery<T>

A query that does not return any results because the query filter is a boolean contradiction.

Since:

8.0

Author:

anistor@redhat.com

Field Summary

Fields inherited from class org.infinispan.query.core.impl.BaseEmbeddedQuery

cache, partitionHandlingSupport, queryStatistics, statementType

Fields inherited from class org.infinispan.query.dsl.impl.BaseQuery

hitCountAccuracy, local, maxResults, namedParameters, projection, queryFactory, queryString, startOffset, timeout

Constructor Summary

Constructors

Constructor	Description
EmptyResultQuery(org.infinispan.query.dsl.QueryFactory queryFactory, org.infinispan.AdvancedCache<?,?> cache, String queryString, org.infinispan.objectfilter.impl.syntax.parser.IckleParsingResult.StatementType statementType, Map<String,Object> namedParameters, long startOffset, int maxResults, LocalQueryStatistics queryStatistics)

Method Summary

Modifier and Type	Method	Description
int	executeStatement()
protected Comparator<Comparable<?>[]>	getComparator()	Create a comparator to be used for ordering the results returned by BaseEmbeddedQuery.getInternalIterator().
protected org.infinispan.commons.util.CloseableIterator<org.infinispan.objectfilter.ObjectFilter.FilterResult>	getInternalIterator()	Create an iterator over the results of the query, in no particular order.
protected void	recordQuery(long time)
String	toString()

Methods inherited from class org.infinispan.query.core.impl.BaseEmbeddedQuery

execute, getResultSize, isSelectStatement, iterator, list, resetQuery

Methods inherited from class org.infinispan.query.dsl.impl.BaseQuery

entryIterator, getMaxResults, getParameters, getProjection, getQueryString, getStartOffset, hasProjections, hitCountAccuracy, hitCountAccuracy, isLocal, local, maxResults, setParameter, setParameters, startOffset, timeout, validateNamedParameters

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

EmptyResultQuery

public EmptyResultQuery(org.infinispan.query.dsl.QueryFactory queryFactory,
 org.infinispan.AdvancedCache<?,?> cache,
 String queryString,
 org.infinispan.objectfilter.impl.syntax.parser.IckleParsingResult.StatementType statementType,
 Map<String,Object> namedParameters,
 long startOffset,
 int maxResults,
 LocalQueryStatistics queryStatistics)

Method Details

recordQuery

protected void recordQuery(long time)

Specified by:

recordQuery in class BaseEmbeddedQuery<T>

getComparator

protected Comparator<Comparable<?>[]> getComparator()

Description copied from class: BaseEmbeddedQuery

Create a comparator to be used for ordering the results returned by BaseEmbeddedQuery.getInternalIterator().

Specified by:

getComparator in class BaseEmbeddedQuery<T>

Returns:

the comparator or null if no sorting needs to be applied

getInternalIterator

protected org.infinispan.commons.util.CloseableIterator<org.infinispan.objectfilter.ObjectFilter.FilterResult> getInternalIterator()

Description copied from class: BaseEmbeddedQuery

Create an iterator over the results of the query, in no particular order. Ordering will be provided if BaseEmbeddedQuery.getComparator() returns a non-null Comparator. Please note this it not the same iterator as the one retuend by BaseEmbeddedQuery.iterator().

Specified by:

getInternalIterator in class BaseEmbeddedQuery<T>

executeStatement

public int executeStatement()

Specified by:

executeStatement in interface org.infinispan.query.dsl.Query<T>

Overrides:

executeStatement in class org.infinispan.query.dsl.impl.BaseQuery<T>

toString

public String toString()

Overrides:

toString in class BaseEmbeddedQuery<T>