org.drools.reteoo
Class QueryTerminalNode

java.lang.Object
  org.drools.common.BaseNode
      org.drools.reteoo.QueryTerminalNode

All Implemented Interfaces:

java.io.Serializable, NetworkNode, NodeMemory, TerminalNode, TupleSink, TupleSinkNode

public final class QueryTerminalNode
extends BaseNode
implements TupleSinkNode, NodeMemory, TerminalNode

Leaf Rete-OO node responsible for enacting Action s on a matched Rule.

Author:

bob mcwhirter

See Also:

Rule, Serialized Form

Field Summary

Fields inherited from class org.drools.common.BaseNode

id

Constructor Summary

QueryTerminalNode(int id, TupleSource source, Rule rule, GroupElement subrule)
Construct.

Method Summary

void	assertTuple(ReteTuple tuple, PropagationContext context, InternalWorkingMemory workingMemory) Assert a new Tuple.
void	attach() Attaches the node into the network.
void	attach(InternalWorkingMemory[] workingMemories)
java.lang.Object	createMemory(RuleBaseConfiguration config)
TupleSinkNode	getNextTupleSinkNode() Returns the next node
TupleSinkNode	getPreviousTupleSinkNode() Returns the previous node
Rule	getRule() Retrieve the Action associated with this node.
GroupElement	getSubrule()
boolean	isInUse() Returns true in case the current node is in use (is referenced by any other node)
boolean	isTupleMemoryEnabled()
void	remove(RuleRemovalContext context, BaseNode node, InternalWorkingMemory[] workingMemories) Removes the node from teh network.
void	retractTuple(ReteTuple tuple, PropagationContext context, InternalWorkingMemory workingMemory)
void	ruleAttached()
void	setNextTupleSinkNode(TupleSinkNode next) Sets the next node
void	setPreviousTupleSinkNode(TupleSinkNode previous) Sets the previous node
void	setTupleMemoryEnabled(boolean tupleMemoryEnabled)
java.lang.String	toString()
void	updateNewNode(InternalWorkingMemory workingMemory, PropagationContext context)

Methods inherited from class org.drools.common.BaseNode

getId, hashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.common.NodeMemory

getId

Constructor Detail

QueryTerminalNode

public QueryTerminalNode(int id,
                         TupleSource source,
                         Rule rule,
                         GroupElement subrule)

Construct.

Parameters:

inputSource - The parent tuple source.

rule - The rule.

Method Detail

getRule

public Rule getRule()

Retrieve the Action associated with this node.

Returns:

The Action associated with this node.

assertTuple

public void assertTuple(ReteTuple tuple,
                        PropagationContext context,
                        InternalWorkingMemory workingMemory)

Assert a new Tuple.

Specified by:

assertTuple in interface TupleSink

Parameters:

tuple - The Tuple being asserted.

workingMemory - The working memory seesion.

context - The PropagationContext of the WorkingMemory action

Throws:

AssertionException - If an error occurs while asserting.

retractTuple

public void retractTuple(ReteTuple tuple,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Specified by:

retractTuple in interface TupleSink

toString

public java.lang.String toString()

Overrides:

toString in class BaseNode

ruleAttached

public void ruleAttached()

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

remove

public void remove(RuleRemovalContext context,
                   BaseNode node,
                   InternalWorkingMemory[] workingMemories)

Description copied from class: BaseNode

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

Specified by:

remove in class BaseNode

isInUse

public boolean isInUse()

Description copied from class: BaseNode

Returns true in case the current node is in use (is referenced by any other node)

Specified by:

isInUse in class BaseNode

Returns:

updateNewNode

public void updateNewNode(InternalWorkingMemory workingMemory,
                          PropagationContext context)

createMemory

public java.lang.Object createMemory(RuleBaseConfiguration config)

Specified by:

createMemory in interface NodeMemory

isTupleMemoryEnabled

public boolean isTupleMemoryEnabled()

Specified by:

isTupleMemoryEnabled in interface TupleSink

setTupleMemoryEnabled

public void setTupleMemoryEnabled(boolean tupleMemoryEnabled)

Specified by:

setTupleMemoryEnabled in interface TupleSink

getSubrule

public GroupElement getSubrule()

Returns:

the subrule

getPreviousTupleSinkNode

public TupleSinkNode getPreviousTupleSinkNode()

Returns the previous node

Specified by:

getPreviousTupleSinkNode in interface TupleSinkNode

Returns:

The previous TupleSinkNode

setPreviousTupleSinkNode

public void setPreviousTupleSinkNode(TupleSinkNode previous)

Sets the previous node

Specified by:

setPreviousTupleSinkNode in interface TupleSinkNode

Parameters:

previous - The previous TupleSinkNode

getNextTupleSinkNode

public TupleSinkNode getNextTupleSinkNode()

Returns the next node

Specified by:

getNextTupleSinkNode in interface TupleSinkNode

Returns:

The next TupleSinkNode

setNextTupleSinkNode

public void setNextTupleSinkNode(TupleSinkNode next)

Sets the next node

Specified by:

setNextTupleSinkNode in interface TupleSinkNode

Parameters:

next - The next TupleSinkNode