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Jadex Rules is a small lightweight rule engine, which currently employs the well-known Rete algorithm for highly efficient rule matching. Jadex rules is therefore similar to other rule engines like JESS and Drools. Despite the similarities there are also important differences between these systems: * Jadex Rules is very small and intended to be used as component of other software. Even though rules can be specified in a Java dialect as well as (a small variation of) the CLIPS language its primary usage is on the API level. Jadex Rules is currently the core component of the Jadex BDI reasoning engine. * Jadex Rules cleanly separates between state and rule representation. This allows the state implementation as well as the matcher to be flexibly exchanged. Some experiments have e.g. been conducted with a Jena representation. Regarding the matcher, it is planned to support also the Treat algorithm, which has a lower memory footprint than Rete. * Jadex Rules pays close attention to rule debugging. The state as well as the rete engine can be observed at runtime. The rule debugger provides functionalities to execute a rule program stepwise and also use rule breakpoints to stop the execution at those points.

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package jadex.rules.rulesystem.rete.nodes;

import jadex.rules.rulesystem.AbstractAgenda;
import jadex.rules.rulesystem.rete.Tuple;
import jadex.rules.state.IOAVState;
import jadex.rules.state.OAVAttributeType;

/**
 *  A node that is able to consume tuples from a
 *  source node.
 */
public interface ITupleConsumerNode extends INode
{
	/**
	 *  Add a new tuple to this node.
	 *  @param tuple The tuple.
	 */
	public void addTuple(Tuple tuple, IOAVState state, ReteMemory mem, AbstractAgenda agenda);
	
	/**
	 *  Remove a tuple from this node.
	 *  @param tuple The tuple.
	 */
	public void removeTuple(Tuple tuple, IOAVState state, ReteMemory mem, AbstractAgenda agenda);
	
	/**
	 *  Modify a tuple in this node.
	 *  @param tuple The tuple.
	 */
	public void modifyTuple(Tuple tuple, int tupleindex, OAVAttributeType type, Object oldvalue, Object newvalue, IOAVState state, ReteMemory mem, AbstractAgenda agenda);
	
	/**
	 *  Set the tuple source of this node.
	 *  @param node The tuple source node.
	 */
	public void setTupleSource(ITupleSourceNode node);
	
	/**
	 *  Get the tuple source of this node.
	 *  @return The tuple source node.
	 */
	public ITupleSourceNode getTupleSource();
}