org.drools.reteoo
Class LeftInputAdapterNode

java.lang.Object
  extended by org.drools.common.BaseNode
      extended by org.drools.reteoo.LeftTupleSource
          extended by 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()
          Attaches the node into the network.
 void attach(InternalWorkingMemory[] workingMemories)
           
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
 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()
          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, getSinkPropagator, isInUse, removeTupleSink
 
Methods inherited from class org.drools.common.BaseNode
addAssociation, 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()
Description copied from class: BaseNode
Attaches the node into the network. Usually to the parent ObjectSource or TupleSource

Specified by:
attach in class BaseNode

attach

public void attach(InternalWorkingMemory[] workingMemories)
Specified by:
attach in class BaseNode

networkUpdated

public void networkUpdated()
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

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


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