Package org.apache.jena.reasoner.rulesys.impl

Class RETEQueue

java.lang.Object

org.apache.jena.reasoner.rulesys.impl.RETEQueue

All Implemented Interfaces:

RETENode, RETESinkNode, RETESourceNode

public class RETEQueue
extends java.lang.Object
implements RETESinkNode, RETESourceNode

Represents one input left of a join node. The queue points to a sibling queue representing the other leg which should be joined against.

Constructor Summary

Constructors

Constructor	Description
RETEQueue(byte[] matchIndices)	Constructor.
RETEQueue(java.util.List<? extends java.lang.Byte> matchIndexList)	Constructor.

Method Summary

Modifier and Type	Method	Description
RETENode	clone(java.util.Map<RETENode,RETENode> netCopy, RETERuleContext context)	Clone this node in the network.
void	fire(BindingVector env, boolean isAdd)	Propagate a token to this node.
void	setContinuation(RETESinkNode continuation)	Set the continuation node for this node (and any sibling)
void	setSibling(RETEQueue sibling)	Set the sibling for this node.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RETEQueue

public RETEQueue(byte[] matchIndices)

Constructor. The queue is not usable until it has been bound to a sibling and a continuation node.

Parameters:

matchIndices - set of variable indices which should match between the two inputs

RETEQueue

public RETEQueue(java.util.List<? extends java.lang.Byte> matchIndexList)

Constructor. The queue is not usable until it has been bound to a sibling and a continuation node.

Parameters:

matchIndexList - List of variable indices which should match between the two inputs

Method Detail

setSibling

public void setSibling(RETEQueue sibling)

Set the sibling for this node.

setContinuation

public void setContinuation(RETESinkNode continuation)

Set the continuation node for this node (and any sibling)

Specified by:

setContinuation in interface RETESourceNode

fire

public void fire(BindingVector env,
                 boolean isAdd)

Propagate a token to this node.

Specified by:

fire in interface RETESinkNode

Parameters:

env - a set of variable bindings for the rule being processed.

isAdd - distinguishes between add and remove operations.

clone

public RETENode clone(java.util.Map<RETENode,RETENode> netCopy,
                      RETERuleContext context)

Clone this node in the network.

Specified by:

clone in interface RETENode

Parameters:

context - the new context to which the network is being ported

netCopy - a map from RETENodes to cloned instance so far.