com.hazelcast.query.impl.predicates

Class AndPredicate

java.lang.Object

com.hazelcast.query.impl.predicates.AndPredicate

All Implemented Interfaces:

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

public final class AndPredicate
extends Object
implements IndexAwarePredicate, IdentifiedDataSerializable, VisitablePredicate, NegatablePredicate, CompoundPredicate

And Predicate

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Predicate[]	predicates

Constructor Summary

Constructors

Constructor and Description
AndPredicate()
AndPredicate(Predicate... predicates)

Method Summary

Modifier and Type	Method and Description
Predicate	accept(Visitor visitor, Indexes indexes) Accept visitor.
boolean	apply(Map.Entry mapEntry) Applies this predicate to the given map entry.
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	getFactoryId() Returns DataSerializableFactory factory ID for this class.
int	getId() Returns type identifier for this class.
<K,V> Predicate<K,V>[]	getPredicates() Visitable predicates are treated as effectively immutable, therefore callers should not make any changes to the returned array.
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.
void	readData(ObjectDataInput in) Reads fields from the input stream
<K,V> void	setPredicates(Predicate<K,V>[] predicates) Visitable predicates are treated as effectively immutable, therefore callers should not make any changes to the array passed as argument after is has been set.
String	toString()
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Field Detail

predicates

protected Predicate[] predicates

Constructor Detail

AndPredicate

public AndPredicate()

AndPredicate

public AndPredicate(Predicate... predicates)

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

Parameters:

visitor - visitor to accept

indexes - indexes

Returns:

itself or its changed copy

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

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.

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

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.

apply

public boolean apply(Map.Entry mapEntry)

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

Parameters:

mapEntry - the map entry to apply this predicate to.

Returns:

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

toString

public String toString()

Overrides:

toString in class Object

writeData

public void writeData(ObjectDataOutput out)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

readData

public void readData(ObjectDataInput in)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the input stream has been closed.

negate

public Predicate negate()

Description copied from interface: NegatablePredicate

Create logical negation of itself.

Specified by:

negate in interface NegatablePredicate

Returns:

A predicate which is a logical negation of itself.

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

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

Returns:

type ID

getPredicates

public <K,V> Predicate<K,V>[] getPredicates()

Visitable predicates are treated as effectively immutable, therefore callers should not make any changes to the returned array.

Specified by:

getPredicates in interface CompoundPredicate

Returns:

array of predicates which will be applied by this predicate

setPredicates

public <K,V> void setPredicates(Predicate<K,V>[] predicates)

Visitable predicates are treated as effectively immutable, therefore callers should not make any changes to the array passed as argument after is has been set.

Specified by:

setPredicates in interface CompoundPredicate

Parameters:

predicates - the array of sub-predicates for this And operator. It is not safe to make any changes to this array after it has been set.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object