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org.drools.reteoo.beta
Class ObjectEqualConstrLeftMemory

java.lang.Object
  org.drools.reteoo.beta.ObjectEqualConstrLeftMemory

All Implemented Interfaces:

java.io.Serializable, BetaLeftMemory

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public class ObjectEqualConstrLeftMemory
extends java.lang.Object
implements BetaLeftMemory

ObjectConstrainedLeftMemory An equal object constrained left memory implementation

See Also:

Serialized Form

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Constructor Summary
ObjectEqualConstrLeftMemory(FieldExtractor extractor, Declaration declaration, Evaluator evaluator)
ObjectEqualConstrLeftMemory(FieldExtractor extractor, Declaration declaration, Evaluator evaluator, BetaLeftMemory childMemory)

 

Method Summary
void	add(WorkingMemory workingMemory, MultiLinkedListNodeWrapper tuple)           Adds the given tuple to the memory
void	add(WorkingMemory workingMemory, ReteTuple tuple)           Adds the given tuple to the memory
BetaLeftMemory	getInnerMemory()           Returns the inner beta left memory in case of a multi-indexed memory
boolean	isClean()           Test method that checks if there is any garbage list in memory, what indicates an error.
boolean	isEmpty()           Checks if this memory is empty
boolean	isPossibleMatch(MultiLinkedListNodeWrapper tuple)           Returns true if the tuple is a possible match to the handle passed to the previous selectPossibleMatches() call
java.util.Iterator	iterator()           Returns an iterator to iterate over all tuples in the beta left memory This method is much heavier than the iterator(workingMemory, handle) method as it is not backed by a data structure.
java.util.Iterator	iterator(WorkingMemory workingMemory, InternalFactHandle handle)           Returns an iterator to iterate over tuples that attend the binder/handle constraints
void	remove(WorkingMemory workingMemory, MultiLinkedListNodeWrapper tuple)           Remove the given tuple from the memory
void	remove(WorkingMemory workingMemory, ReteTuple tuple)           Remove the given tuple from the memory
void	selectPossibleMatches(WorkingMemory workingMemory, InternalFactHandle handle)           Prepares the left memory for subsequent calls of isPossibleMatch() based on the constraints applied to the handle.
void	setInnerMemory(BetaLeftMemory innerMemory)           Sets the inner beta left memory in case of a multi-indexed memory
int	size()           Returns the number of tuples currently stored in the left memory

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

ObjectEqualConstrLeftMemory

public ObjectEqualConstrLeftMemory(FieldExtractor extractor,
                                   Declaration declaration,
                                   Evaluator evaluator)

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ObjectEqualConstrLeftMemory

public ObjectEqualConstrLeftMemory(FieldExtractor extractor,
                                   Declaration declaration,
                                   Evaluator evaluator,
                                   BetaLeftMemory childMemory)

Method Detail

add

public final void add(WorkingMemory workingMemory,
                      ReteTuple tuple)

Description copied from interface: BetaLeftMemory

Adds the given tuple to the memory

Specified by:

add in interface BetaLeftMemory

Parameters:

workingMemory - the working memory reference

tuple - the tuple to add

See Also:

BetaLeftMemory.add(org.drools.WorkingMemory, org.drools.reteoo.ReteTuple)

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remove

public final void remove(WorkingMemory workingMemory,
                         ReteTuple tuple)

Description copied from interface: BetaLeftMemory

Remove the given tuple from the memory

Specified by:

remove in interface BetaLeftMemory

tuple - the tuple to remove

See Also:

org.drools.reteoo.beta.BetaLeftMemory#remove(org.drools.reteoo.ReteTuple)

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add

public final void add(WorkingMemory workingMemory,
                      MultiLinkedListNodeWrapper tuple)

Description copied from interface: BetaLeftMemory

Adds the given tuple to the memory

Specified by:

add in interface BetaLeftMemory

Parameters:

workingMemory - the working memory reference

tuple - the tuple to add

See Also:

org.drools.reteoo.beta.BetaLeftMemory#add(org.drools.reteoo.ReteTuple)

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remove

public final void remove(WorkingMemory workingMemory,
                         MultiLinkedListNodeWrapper tuple)

Description copied from interface: BetaLeftMemory

Remove the given tuple from the memory

Specified by:

remove in interface BetaLeftMemory

Parameters:

workingMemory - the working memory reference

tuple - the tuple to remove

See Also:

org.drools.reteoo.beta.BetaLeftMemory#remove(org.drools.reteoo.ReteTuple)

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isEmpty

public final boolean isEmpty()

Description copied from interface: BetaLeftMemory

Checks if this memory is empty

Specified by:

isEmpty in interface BetaLeftMemory

Returns:

true if the memory is empty, false otherwise

See Also:

BetaLeftMemory.isEmpty()

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iterator

public final java.util.Iterator iterator(WorkingMemory workingMemory,
                                         InternalFactHandle handle)

Description copied from interface: BetaLeftMemory

Returns an iterator to iterate over tuples that attend the binder/handle constraints

Specified by:

iterator in interface BetaLeftMemory

Parameters:

workingMemory - the working memory reference

handle - the handle whose tuples will try to join

Returns:

an Iterator over the tuples

See Also:

org.drools.reteoo.beta.BetaLeftMemory#iterator(org.drools.WorkingMemory, org.drools.reteoo.FactHandleImpl)

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iterator

public final java.util.Iterator iterator()

Description copied from interface: BetaLeftMemory

Returns an iterator to iterate over all tuples in the beta left memory This method is much heavier than the iterator(workingMemory, handle) method as it is not backed by a data structure. Order of elements are dynamically calculated, so, avoid using it if possible.

Specified by:

iterator in interface BetaLeftMemory

Returns:

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selectPossibleMatches

public final void selectPossibleMatches(WorkingMemory workingMemory,
                                        InternalFactHandle handle)

Description copied from interface: BetaLeftMemory

Prepares the left memory for subsequent calls of isPossibleMatch() based on the constraints applied to the handle. Also, iterator() usually calls this method to select tuples to iterate over.

Specified by:

selectPossibleMatches in interface BetaLeftMemory

Parameters:

workingMemory - the working memory reference

handle - the handle whose tuples shall match

See Also:

org.drools.reteoo.beta.BetaLeftMemory#selectPossibleMatches(org.drools.WorkingMemory, org.drools.reteoo.FactHandleImpl)

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isPossibleMatch

public final boolean isPossibleMatch(MultiLinkedListNodeWrapper tuple)

Description copied from interface: BetaLeftMemory

Returns true if the tuple is a possible match to the handle passed to the previous selectPossibleMatches() call

Specified by:

isPossibleMatch in interface BetaLeftMemory

Returns:

See Also:

BetaLeftMemory.isPossibleMatch(org.drools.util.MultiLinkedListNodeWrapper)

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size

public final int size()

Description copied from interface: BetaLeftMemory

Returns the number of tuples currently stored in the left memory

Specified by:

size in interface BetaLeftMemory

Returns:

the number of tuples currently stored in the left memory

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isClean

public final boolean isClean()

Test method that checks if there is any garbage list in memory, what indicates an error. It must be used only in unit tests.

Returns:

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getInnerMemory

public BetaLeftMemory getInnerMemory()

Description copied from interface: BetaLeftMemory

Returns the inner beta left memory in case of a multi-indexed memory

Specified by:

getInnerMemory in interface BetaLeftMemory

Returns:

the inner beta left memory or null in case it is not a multi-indexed memory

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setInnerMemory

public void setInnerMemory(BetaLeftMemory innerMemory)

Description copied from interface: BetaLeftMemory

Sets the inner beta left memory in case of a multi-indexed memory

Specified by:

setInnerMemory in interface BetaLeftMemory

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