org.drools.reteoo
Class LeftInputAdapterNode

java.lang.Object
  org.drools.common.BaseNode
      org.drools.reteoo.LeftTupleSource
          org.drools.reteoo.LeftInputAdapterNode

All Implemented Interfaces:

Externalizable, Serializable, NetworkNode, ObjectSink, ObjectSinkNode, Sink

public class LeftInputAdapterNode
extends LeftTupleSource
implements ObjectSinkNode

All asserting Facts must propagated into the right ObjectSink side of a BetaNode, if this is the first Pattern then there are no BetaNodes to propagate to. LeftInputAdapter is used to adapt an ObjectSink propagation into a TupleSource which propagates a ReteTuple suitable fot the right ReteTuple side of a BetaNode.

See Also:

Serialized Form

Field Summary

protected boolean

rootQueryNode

Fields inherited from class org.drools.reteoo.LeftTupleSource

sink

Fields inherited from class org.drools.common.BaseNode

associations, id, partitionId, partitionsEnabled

Constructor Summary

LeftInputAdapterNode()

LeftInputAdapterNode(int id, ObjectSource source, BuildContext context)
Constructus a LeftInputAdapterNode with a unique id that receives FactHandle from a parent ObjectSource and adds it to a given pattern in the resulting Tuples.

Method Summary

void	assertObject(InternalFactHandle factHandle, PropagationContext context, InternalWorkingMemory workingMemory) Takes the asserted FactHandleImpl received from the ObjectSource and puts it in a new ReteTuple before propagating to the TupleSinks
void	attach(BuildContext context) Attaches the node into the network.
void	byPassModifyToBetaNode(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
protected void	doRemove(RuleRemovalContext context, ReteooBuilder builder, BaseNode node, InternalWorkingMemory[] workingMemories) Removes the node from teh network.
boolean	equals(Object object)
ObjectSinkNode	getNextObjectSinkNode() Returns the next node
protected ObjectTypeNode	getObjectTypeNode()
ObjectSource	getParentObjectSource()
ObjectSinkNode	getPreviousObjectSinkNode() Returns the previous node
int	hashCode() The hashCode return is simply the unique id of the node.
boolean	isRootQueryNode()
void	modifyObject(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
void	networkUpdated(UpdateContext updateContext) A method that is called for all nodes whose network below them changed, after the change is complete, providing them with an oportunity for state update
void	readExternal(ObjectInput in)
void	setNextObjectSinkNode(ObjectSinkNode next) Sets the next node
void	setPreviousObjectSinkNode(ObjectSinkNode previous) Sets the previous node
void	updateSink(LeftTupleSink sink, PropagationContext context, InternalWorkingMemory workingMemory)
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.reteoo.LeftTupleSource

addTupleSink, addTupleSink, addTupleSink, doModifyLeftTuple, getLeftDeclaredMask, getLeftInferredMask, getLeftInputOtnId, getLeftNegativeMask, getObjectType, getSinkPropagator, initDeclaredMask, initInferredMask, initMasks, isInUse, modifyLeftTuple, removeTupleSink, setLeftInferredMask, setLeftInputOtnId, setLeftListenedProperties, unwrapLeftInput

Methods inherited from class org.drools.common.BaseNode

addAssociation, attach, getAssociations, getId, getPartitionId, remove, removeAssociation, setPartitionId, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.drools.common.NetworkNode

getId, getPartitionId

Field Detail

rootQueryNode

protected boolean rootQueryNode

Constructor Detail

LeftInputAdapterNode

public LeftInputAdapterNode()

LeftInputAdapterNode

public LeftInputAdapterNode(int id,
                            ObjectSource source,
                            BuildContext context)

Constructus a LeftInputAdapterNode with a unique id that receives FactHandle from a parent ObjectSource and adds it to a given pattern in the resulting Tuples.

Parameters:

id - The unique id of this node in the current Rete network

source - The parent node, where Facts are propagated from

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class LeftTupleSource

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class LeftTupleSource

Throws:

IOException

isRootQueryNode

public boolean isRootQueryNode()

getParentObjectSource

public ObjectSource getParentObjectSource()

attach

public void attach(BuildContext context)

Description copied from class: BaseNode

Attaches the node into the network. Usually to the parent ObjectSource or TupleSource

Specified by:

attach in class BaseNode

networkUpdated

public void networkUpdated(UpdateContext updateContext)

Description copied from class: BaseNode

A method that is called for all nodes whose network below them changed, after the change is complete, providing them with an oportunity for state update

Specified by:

networkUpdated in class BaseNode

assertObject

public void assertObject(InternalFactHandle factHandle,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Takes the asserted FactHandleImpl received from the ObjectSource and puts it in a new ReteTuple before propagating to the TupleSinks

Specified by:

assertObject in interface ObjectSink

Parameters:

factHandle - The asserted FactHandle/code>.

context - The PropagationContext of the WorkingMemory action.

workingMemory - the WorkingMemory session.

modifyObject

public void modifyObject(InternalFactHandle factHandle,
                         ModifyPreviousTuples modifyPreviousTuples,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Specified by:

modifyObject in interface ObjectSink

byPassModifyToBetaNode

public void byPassModifyToBetaNode(InternalFactHandle factHandle,
                                   ModifyPreviousTuples modifyPreviousTuples,
                                   PropagationContext context,
                                   InternalWorkingMemory workingMemory)

Specified by:

byPassModifyToBetaNode in interface ObjectSink

updateSink

public void updateSink(LeftTupleSink sink,
                       PropagationContext context,
                       InternalWorkingMemory workingMemory)

Specified by:

updateSink in class LeftTupleSource

doRemove

protected void doRemove(RuleRemovalContext context,
                        ReteooBuilder builder,
                        BaseNode node,
                        InternalWorkingMemory[] workingMemories)

Description copied from class: BaseNode

Removes the node from teh network. Usually from the parent ObjectSource or TupleSource

Specified by:

doRemove in class BaseNode

getNextObjectSinkNode

public ObjectSinkNode getNextObjectSinkNode()

Returns the next node

Specified by:

getNextObjectSinkNode in interface ObjectSinkNode

Returns:

The next ObjectSinkNode

setNextObjectSinkNode

public void setNextObjectSinkNode(ObjectSinkNode next)

Sets the next node

Specified by:

setNextObjectSinkNode in interface ObjectSinkNode

Parameters:

next - The next ObjectSinkNode

getPreviousObjectSinkNode

public ObjectSinkNode getPreviousObjectSinkNode()

Returns the previous node

Specified by:

getPreviousObjectSinkNode in interface ObjectSinkNode

Returns:

The previous ObjectSinkNode

setPreviousObjectSinkNode

public void setPreviousObjectSinkNode(ObjectSinkNode previous)

Sets the previous node

Specified by:

setPreviousObjectSinkNode in interface ObjectSinkNode

Parameters:

previous - The previous ObjectSinkNode

hashCode

public int hashCode()

Description copied from class: BaseNode

The hashCode return is simply the unique id of the node. It is expected that base classes will also implement equals(Object object).

Overrides:

hashCode in class BaseNode

equals

public boolean equals(Object object)

Overrides:

equals in class Object

getObjectTypeNode

protected ObjectTypeNode getObjectTypeNode()

Specified by:

getObjectTypeNode in class LeftTupleSource