Package org.drools.core.reteoo
Class ExistsNode
- java.lang.Object
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- org.drools.core.common.BaseNode
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- org.drools.core.reteoo.LeftTupleSource
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- org.drools.core.reteoo.BetaNode
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- org.drools.core.reteoo.ExistsNode
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- All Implemented Interfaces:
Externalizable
,Serializable
,MemoryFactory
,NetworkNode
,LeftTupleNode
,LeftTupleSink
,LeftTupleSinkNode
,ObjectSink
,ObjectSinkNode
,RightTupleSink
,Sink
public class ExistsNode extends BetaNode
ExistsNode
extendsBetaNode
to perform tests for the existence of a Fact plus one or more conditions. Where existence is found the left ReteTuple is copied and propagated. Further to this it maintains the "truth" by canceling anyActivation
s that are no longer considered true by the retraction of ReteTuple's or FactHandleImpl. Tuples are considered to be asserted from the left input and facts from the right input. The
BetaNode
provides the BetaMemory to store asserted ReteTuples andFactHandleImpl
s. Each fact handle is stored in the right memory.
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.drools.core.reteoo.BetaNode
constraints, indexedUnificationJoin, isLogTraceEnabled, log, objectMemory, rightInput, rightInputIsRiaNode, tupleMemoryEnabled
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Fields inherited from class org.drools.core.reteoo.LeftTupleSource
leftDeclaredMask, leftInferredMask, leftInput, leftNegativeMask, sink
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Fields inherited from class org.drools.core.common.BaseNode
associations, hashcode, id, memoryId, partitionId, partitionsEnabled
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Constructor Summary
Constructors Constructor Description ExistsNode()
ExistsNode(int id, LeftTupleSource leftInput, ObjectSource rightInput, BetaConstraints joinNodeBinder, BuildContext context)
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Method Summary
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Methods inherited from class org.drools.core.reteoo.BetaNode
assertObject, byPassModifyToBetaNode, calculateHashCode, createMemory, createRightTuple, doAttach, doDeleteRightTuple, doUpdateRightTuple, dumpMemory, equals, getBetaMemory, getBetaMemoryFromRightInput, getConstraints, getFirstLeftTuple, getFirstLeftTuple1, getFirstRightTuple, getFirstTuple, getLeftIterator, getLeftIterator1, getNextLeftTupleSinkNode, getNextObjectSinkNode, getObjectTypeNode, getPreviousLeftTupleSinkNode, getPreviousObjectSinkNode, getRawConstraints, getRightDeclaredMask, getRightInferredMask, getRightInput, getRightInputOtnId, getRightIterator, getRightIterator, getRightNegativeMask, getRules, getStartTuple, initDeclaredMask, initInferredMask, initInferredMask, isIndexedUnificationJoin, isLeftTupleMemoryEnabled, isObjectMemoryEnabled, isRightInputIsRiaNode, isRightInputPassive, modifyObject, networkUpdated, readExternal, reorderRightTuple, setLeftListenedProperties, setLeftTupleMemoryEnabled, setNextLeftTupleSinkNode, setNextObjectSinkNode, setPartitionId, setPreviousLeftTupleSinkNode, setPreviousObjectSinkNode, setRightDeclaredMask, setRightInput, setRightInputOtnId, unwrapRightInput, writeExternal
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Methods inherited from class org.drools.core.reteoo.LeftTupleSource
addTupleSink, addTupleSink, addTupleSink, getLeftDeclaredMask, getLeftInferredMask, getLeftInputOtnId, getLeftInputPattern, getLeftNegativeMask, getLeftTupleSource, getObjectCount, getObjectType, getObjectTypeForPropertyReactivity, getPathIndex, getSinkPropagator, initMasks, isInUse, removeTupleSink, setLeftInferredMask, setLeftInputOtnId, setLeftTupleSource, setNodeConstraintsPropertyReactiveMask, setObjectCount, setPartitionIdWithSinks, setSourcePartitionId, setSourcePartitionId
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Methods inherited from class org.drools.core.common.BaseNode
addAssociation, addAssociation, attach, getAssociatedRules, getAssociatedRuleSize, getAssociationsSize, getAssociationsSize, getId, getMemoryId, getPartitionId, getSinks, hashCode, initMemoryId, isAssociatedWith, isStreamMode, remove, removeAssociation, setId, setPartitionsEnabled, setStreamMode
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.drools.core.reteoo.LeftTupleNode
getLeftTupleSource, getObjectCount, getPathIndex, getSinkPropagator, setObjectCount
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Methods inherited from interface org.drools.core.reteoo.LeftTupleSink
getLeftInferredMask, getLeftInputOtnId, setLeftInputOtnId, setPartitionIdWithSinks
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Methods inherited from interface org.drools.core.common.MemoryFactory
getMemoryId
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Methods inherited from interface org.drools.core.common.NetworkNode
getAssociatedRules, getAssociatedRuleSize, getAssociationsSize, getAssociationsSize, getId, getPartitionId, isAssociatedWith
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Methods inherited from interface org.drools.core.reteoo.ObjectSinkNode
setPartitionIdWithSinks
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Constructor Detail
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ExistsNode
public ExistsNode()
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ExistsNode
public ExistsNode(int id, LeftTupleSource leftInput, ObjectSource rightInput, BetaConstraints joinNodeBinder, BuildContext context)
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Method Detail
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getType
public short getType()
- Specified by:
getType
in interfaceNetworkNode
- Specified by:
getType
in classLeftTupleSource
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createLeftTuple
public LeftTuple createLeftTuple(InternalFactHandle factHandle, boolean leftTupleMemoryEnabled)
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createLeftTuple
public LeftTuple createLeftTuple(InternalFactHandle factHandle, LeftTuple leftTuple, Sink sink)
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createLeftTuple
public LeftTuple createLeftTuple(LeftTuple leftTuple, Sink sink, PropagationContext pctx, boolean leftTupleMemoryEnabled)
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createLeftTuple
public LeftTuple createLeftTuple(LeftTuple leftTuple, RightTuple rightTuple, Sink sink)
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createLeftTuple
public LeftTuple createLeftTuple(LeftTuple leftTuple, RightTuple rightTuple, LeftTuple currentLeftChild, LeftTuple currentRightChild, Sink sink, boolean leftTupleMemoryEnabled)
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createPeer
public LeftTuple createPeer(LeftTuple original)
- Specified by:
createPeer
in interfaceLeftTupleSink
- Specified by:
createPeer
in classLeftTupleSource
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retractRightTuple
public void retractRightTuple(RightTuple rightTuple, PropagationContext pctx, InternalWorkingMemory workingMemory)
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modifyRightTuple
public void modifyRightTuple(RightTuple rightTuple, PropagationContext context, InternalWorkingMemory workingMemory)
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doRemove
public boolean doRemove(RuleRemovalContext context, ReteooBuilder builder)
Description copied from class:BaseNode
Removes the node from the network. Usually from the parentObjectSource
orTupleSource
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isLeftUpdateOptimizationAllowed
public boolean isLeftUpdateOptimizationAllowed()
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