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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.reteoo 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.drools.reteoo.TupleSource
   org.drools.reteoo.BetaNode
      org.drools.reteoo.JoinNode

JoinNode
public class JoinNode extends BetaNode (Code)
JoinNode extends BetaNode to perform ReteTuple and FactHandle joins. Tuples are considered to be asserted from the left input and facts from the right input. The BetaNode provides the BetaMemory to store assserted ReteTuples and FactHandleImpls. Each fact handle is stored in the right memory as a key in a HashMap, the value is an ObjectMatches instance which maintains a LinkedList of TuplesMatches - The tuples that are matched with the handle. the left memory is a LinkedList of ReteTuples which maintains a HashMa, where the keys are the matching FactHandleImpls and the value is populated TupleMatchees, the keys are matched fact handles. TupleMatch maintains a List of resulting joins, where there is joined ReteTuple per TupleSink. The BetaNode provides the BetaMemory which stores the
See Also:   BetaNode
See Also:   ObjectMatches
See Also:   TupleMatch
See Also:   TupleSink
author:
   Mark Proctor
author:
   Bob McWhirter



Constructor Summary
public  JoinNode(int id, TupleSource leftInput, ObjectSource rightInput)
     Construct.
public  JoinNode(int id, TupleSource leftInput, ObjectSource rightInput, BetaConstraints binder)
    

Method Summary
public  voidassertObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)
     Assert a new FactHandleImpl.
public  voidassertTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)
     Assert a new ReteTuple.
public  voidretractObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)
     Retract a FactHandleImpl.
public  voidretractTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)
     Retract a ReteTuple.
public  StringtoString()
    
public  voidupdateSink(TupleSink sink, PropagationContext context, InternalWorkingMemory workingMemory)
    


Constructor Detail
JoinNode
public JoinNode(int id, TupleSource leftInput, ObjectSource rightInput)(Code)
Construct.
Parameters:
  leftInput - The left input TupleSource.
Parameters:
  rightInput - The right input TupleSource.



JoinNode
public JoinNode(int id, TupleSource leftInput, ObjectSource rightInput, BetaConstraints binder)(Code)




Method Detail
assertObject
public void assertObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)(Code)
Assert a new FactHandleImpl. The left input of ReteTuples is iterated and joins attemped, via the binder, any successful bindings results in joined tuples being created and propaged. there is a joined tuple per TupleSink.
See Also:   ReteTuple
See Also:   ObjectMatches
See Also:   TupleSink
See Also:   TupleMatch
Parameters:
  handle - The FactHandleImpl being asserted.
Parameters:
  context - The PropagationContext
Parameters:
  workingMemory - The working memory seesion.



assertTuple
public void assertTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)(Code)
Assert a new ReteTuple. The right input of FactHandleInput's is iterated and joins attemped, via the binder, any successful bindings results in joined tuples being created and propaged. there is a joined tuple per TupleSink.
See Also:   ReteTuple
See Also:   ObjectMatches
See Also:   TupleSink
See Also:   TupleMatch
Parameters:
  tuple - The Tuple being asserted.
Parameters:
  context - The PropagationContext
Parameters:
  workingMemory - The working memory seesion.



retractObject
public void retractObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)(Code)
Retract a FactHandleImpl. Iterates the referenced TupleMatches stored in the handle's ObjectMatches retracting joined tuples.
Parameters:
  handle - the being retracted
Parameters:
  context - The PropagationContext
Parameters:
  workingMemory - The working memory seesion.



retractTuple
public void retractTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)(Code)
Retract a ReteTuple. Iterates the referenced TupleMatche's stored in the tuples Map retracting all joined tuples.
Parameters:
  key - The tuple key.
Parameters:
  context - The PropagationContext
Parameters:
  workingMemory - The working memory seesion.



toString
public String toString()(Code)



updateSink
public void updateSink(TupleSink sink, PropagationContext context, InternalWorkingMemory workingMemory)(Code)



Fields inherited from org.drools.reteoo.BetaNode
final protected BetaConstraints constraints(Code)(Java Doc)
final protected TupleSource leftInput(Code)(Java Doc)
final protected ObjectSource rightInput(Code)(Java Doc)

Methods inherited from org.drools.reteoo.BetaNode
public void attach()(Code)(Java Doc)
public void attach(InternalWorkingMemory[] workingMemories)(Code)(Java Doc)
public Object createMemory(RuleBaseConfiguration config)(Code)(Java Doc)
public void dumpMemory(InternalWorkingMemory workingMemory)(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
public BetaNodeFieldConstraint[] getConstraints()(Code)(Java Doc)
public ObjectSinkNode getNextObjectSinkNode()(Code)(Java Doc)
public TupleSinkNode getNextTupleSinkNode()(Code)(Java Doc)
public ObjectTypeNode getObjectTypeNode()(Code)(Java Doc)
public ObjectSinkNode getPreviousObjectSinkNode()(Code)(Java Doc)
public TupleSinkNode getPreviousTupleSinkNode()(Code)(Java Doc)
public List getRules()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
public void remove(BaseNode node, InternalWorkingMemory[] workingMemories)(Code)(Java Doc)
public void setNextObjectSinkNode(ObjectSinkNode next)(Code)(Java Doc)
public void setNextTupleSinkNode(TupleSinkNode next)(Code)(Java Doc)
public void setPreviousObjectSinkNode(ObjectSinkNode previous)(Code)(Java Doc)
public void setPreviousTupleSinkNode(TupleSinkNode previous)(Code)(Java Doc)
public String toString()(Code)(Java Doc)

Fields inherited from org.drools.reteoo.TupleSource
protected TupleSinkPropagator sink(Code)(Java Doc)

Methods inherited from org.drools.reteoo.TupleSource
protected void addTupleSink(TupleSink tupleSink)(Code)(Java Doc)
public TupleSinkPropagator getSinkPropagator()(Code)(Java Doc)
protected void removeTupleSink(TupleSink tupleSink)(Code)(Java Doc)
abstract public void updateSink(TupleSink sink, PropagationContext context, InternalWorkingMemory workingMemory)(Code)(Java Doc)

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