org.eclipse.viatra.query.runtime.rete.tuple

Class MaskedTupleMemory

java.lang.Object

org.eclipse.viatra.query.runtime.rete.tuple.MaskedTupleMemory

All Implemented Interfaces:

java.lang.Iterable<Tuple>, Clearable

public class MaskedTupleMemory
extends java.lang.Object
implements Clearable, java.lang.Iterable<Tuple>

Field Summary

Fields

Modifier and Type	Field and Description
protected TupleMask	mask The mask used to index the matchings
protected java.util.Map<Tuple,java.util.Collection<Tuple>>	matchings Counts the number of occurences of each pattern.

Constructor Summary

Constructors

Constructor and Description
MaskedTupleMemory(TupleMask mask)

Method Summary

Modifier and Type	Method and Description
boolean	add(Tuple ps) Adds a pattern occurence to the memory
boolean	add(Tuple ps, Tuple signature) Adds a pattern occurence to the memory, with given signature
void	clear() Clear all partial matchings stored in memory
java.util.Collection<Tuple>	get(Tuple signature) Retrieves entries that have the specified signature
int	getKeysetSize()
java.util.Collection<Tuple>	getSignatures() Retrieves a read-only collection of exactly those signatures for which at least one tuple is stored
int	getTotalSize()
java.util.Iterator<Tuple>	iterator()
boolean	remove(Tuple ps) Removes a pattern occurence from the memory
boolean	remove(Tuple ps, Tuple signature) Removes a pattern occurence from the memory, with given signature
java.lang.String	toString()

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

Field Detail

matchings

protected java.util.Map<Tuple,java.util.Collection<Tuple>> matchings

Counts the number of occurences of each pattern. Element is deleted if # of occurences drops to 0.

mask

protected TupleMask mask

The mask used to index the matchings

Constructor Detail

MaskedTupleMemory

public MaskedTupleMemory(TupleMask mask)

Parameters:

mask - The mask used to index the matchings

Method Detail

add

public boolean add(Tuple ps)

Adds a pattern occurence to the memory

Parameters:

ps -

Returns:

true if new signature encountered

add

public boolean add(Tuple ps,
                   Tuple signature)

Adds a pattern occurence to the memory, with given signature

Parameters:

ps -

signature -

Returns:

true if new signature encountered

remove

public boolean remove(Tuple ps)

Removes a pattern occurence from the memory

Returns:

true if this was the the last occurence of the signature

remove

public boolean remove(Tuple ps,
                      Tuple signature)

Removes a pattern occurence from the memory, with given signature

Returns:

true if this was the the last occurence of the signature

get

public java.util.Collection<Tuple> get(Tuple signature)

Retrieves entries that have the specified signature

Returns:

collection of matchings found

clear

public void clear()

Description copied from interface: Clearable

Clear all partial matchings stored in memory

Specified by:

clear in interface Clearable

getSignatures

public java.util.Collection<Tuple> getSignatures()

Retrieves a read-only collection of exactly those signatures for which at least one tuple is stored

Returns:

collection of significant signatures

iterator

public java.util.Iterator<Tuple> iterator()

Specified by:

iterator in interface java.lang.Iterable<Tuple>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getTotalSize

public int getTotalSize()

getKeysetSize

public int getKeysetSize()