com.hazelcast.query.impl.bitmap

Class Bitmap<E>

java.lang.Object

com.hazelcast.query.impl.bitmap.Bitmap<E>

Type Parameters:

E - the type of entries being indexed.

public final class Bitmap<E>
extends Object

Provides indexing and querying capabilities for a single attribute of entries of type E. Each indexed entry is uniquely identified by its unique long key provided externally.

Internally, each bitmap manages a set of sparse bit sets, one for each possible attribute value, and a sparse array to map from unique long entry keys back to entries.

Constructor Summary

Constructors

Constructor and Description
Bitmap()

Method Summary

Modifier and Type	Method and Description
void	clear() Clears this bitmap.
Iterator<E>	evaluate(Predicate predicate, TypeConverter converter) Evaluates the given predicate while converting the predicate arguments using the given converter.
void	insert(Iterator values, long key, E entry) Inserts the given values associated with the given entry having the given unique key.
void	remove(Iterator values, long key) Removes the given values associated with an entry identified by the given unique key.
void	update(Iterator oldValues, Iterator newValues, long key, E entry) Updates the given old values to the given new values associated with the given entry having the given unique key.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bitmap

public Bitmap()

Method Detail

insert

public void insert(Iterator values,
                   long key,
                   E entry)

Inserts the given values associated with the given entry having the given unique key.

Parameters:

values - the values to insert.

key - the unique key of the entry being inserted.

entry - the entry to insert.

update

public void update(Iterator oldValues,
                   Iterator newValues,
                   long key,
                   E entry)

Updates the given old values to the given new values associated with the given entry having the given unique key.

Parameters:

oldValues - the old values to replace.

newValues - the new values to replace with.

key - the unique key of the entry being updated.

entry - the entry to update.

remove

public void remove(Iterator values,
                   long key)

Removes the given values associated with an entry identified by the given unique key.

Parameters:

values - the values to remove.

key - the unique key of an entry being removed.

clear

public void clear()

Clears this bitmap.

evaluate

public Iterator<E> evaluate(Predicate predicate,
                            TypeConverter converter)

Evaluates the given predicate while converting the predicate arguments using the given converter.

The following predicates (and combinations of them) are supported: AndPredicate, OrPredicate, NotPredicate, NotEqualPredicate, EqualPredicate, InPredicate.

Parameters:

predicate - the predicate to evaluate.

converter - the converter to use for the predicate arguments conversion.

Returns:

an iterator containing entries matching the given predicate.