com.hazelcast.query.impl.predicates

Class NotEqualPredicate

java.lang.Object

com.hazelcast.query.impl.predicates.AbstractPredicate<K,V>

com.hazelcast.query.impl.predicates.AbstractIndexAwarePredicate

com.hazelcast.query.impl.predicates.EqualPredicate

com.hazelcast.query.impl.predicates.NotEqualPredicate

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, NegatablePredicate, RangePredicate, IndexAwarePredicate, Predicate, VisitablePredicate, Serializable

public final class NotEqualPredicate
extends EqualPredicate

Not Equal Predicate

See Also:

Serialized Form

Field Summary

Fields inherited from class com.hazelcast.query.impl.predicates.EqualPredicate

value

Constructor Summary

Constructors

Constructor and Description
NotEqualPredicate()
NotEqualPredicate(String attribute, Comparable value)

Method Summary

Modifier and Type	Method and Description
Predicate	accept(Visitor visitor, Indexes indexes) Accept visitor.
boolean	apply(Map.Entry entry) Applies this predicate to the given map entry.
boolean	canEqual(Object other)
boolean	equals(Object o)
Set<QueryableEntry>	filter(QueryContext queryContext) Produces a filtered entry set by utilizing the indexes available while executing the query in the given query context.
int	getId() Returns type identifier for this class.
int	hashCode()
boolean	isIndexed(QueryContext queryContext) Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.
Predicate	negate() Create logical negation of itself.
String	toString()

Methods inherited from class com.hazelcast.query.impl.predicates.EqualPredicate

applyForSingleAttributeValue, getAttribute, getFrom, getTo, isFromInclusive, isToInclusive, readData, writeData

Methods inherited from class com.hazelcast.query.impl.predicates.AbstractIndexAwarePredicate

getIndex, matchIndex

Methods inherited from class com.hazelcast.query.impl.predicates.AbstractPredicate

convert, getFactoryId

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

NotEqualPredicate

public NotEqualPredicate()

NotEqualPredicate

public NotEqualPredicate(String attribute,
                         Comparable value)

Method Detail

accept

public Predicate accept(Visitor visitor,
                        Indexes indexes)

Description copied from interface: VisitablePredicate

Accept visitor. Predicate can either return it's own instance if no modification was done as a result of the visit. In the case there is a change needed then the predicate has to return changed copy of itself. Predicates has to be treated as immutable for optimization purposes.

Specified by:

accept in interface VisitablePredicate

Overrides:

accept in class EqualPredicate

Parameters:

visitor - visitor to accept

indexes - indexes

Returns:

itself or its changed copy

apply

public boolean apply(Map.Entry entry)

Description copied from interface: Predicate

Applies this predicate to the given map entry.

Implementations must be thread-safe, since this method may be called by multiple threads concurrently.

Specified by:

apply in interface Predicate

Overrides:

apply in class AbstractPredicate

Parameters:

entry - the map entry to apply this predicate to.

Returns:

true if the given map entry matches this predicate, false otherwise.

isIndexed

public boolean isIndexed(QueryContext queryContext)

Description copied from interface: IndexAwarePredicate

Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.

Specified by:

isIndexed in interface IndexAwarePredicate

Overrides:

isIndexed in class AbstractIndexAwarePredicate

Parameters:

queryContext - the query context to consult for the available indexes.

Returns:

true if this predicate is able to use the indexes to speed up the processing, false otherwise.

filter

public Set<QueryableEntry> filter(QueryContext queryContext)

Description copied from interface: IndexAwarePredicate

Produces a filtered entry set by utilizing the indexes available while executing the query in the given query context.

The query engine assumes this method produces the result set faster than a simple evaluation of the predicate on every entry.

Specified by:

filter in interface IndexAwarePredicate

Overrides:

filter in class EqualPredicate

Parameters:

queryContext - the query context to access the indexes. The passed query context is valid only for a duration of a single call to the method.

Returns:

the produced filtered entry set.

toString

public String toString()

Overrides:

toString in class EqualPredicate

negate

public Predicate negate()

Description copied from interface: NegatablePredicate

Create logical negation of itself.

Specified by:

negate in interface NegatablePredicate

Overrides:

negate in class EqualPredicate

Returns:

A predicate which is a logical negation of itself.

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Specified by:

getId in interface IdentifiedDataSerializable

Overrides:

getId in class EqualPredicate

Returns:

type ID

equals

public boolean equals(Object o)

Overrides:

equals in class EqualPredicate

canEqual

public boolean canEqual(Object other)

Overrides:

canEqual in class EqualPredicate

hashCode

public int hashCode()

Overrides:

hashCode in class EqualPredicate