Package jadex.rules.rulesystem.rete.extractors

Class StateExtractor

java.lang.Object

jadex.rules.rulesystem.rete.extractors.StateExtractor

All Implemented Interfaces:

IValueExtractor

public class StateExtractor
extends java.lang.Object
implements IValueExtractor

The state extractor returns the current state as value. Is the extractor for the reserved variable Variable.STATE ($state).

Constructor Summary

Constructors

Constructor	Description
StateExtractor()

Method Summary

Modifier and Type	Method	Description
AttributeSet	getIndirectAttributes()	Get the set of indirect attribute types.
AttributeSet	getRelevantAttributes()	Get the set of relevant attribute types.
java.lang.Object	getValue(Tuple left, java.lang.Object right, java.lang.Object prefix, IOAVState state)	Get the value of an attribute from an object or tuple.
boolean	isAffected(int tupleindex, OAVAttributeType attr)	Test if a constraint evaluator is affected from a change of a certain attribute.
java.lang.String	toString()	Get the string representation.

Methods inherited from class java.lang.Object

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

Constructor Detail

StateExtractor

public StateExtractor()

Method Detail

getValue

public java.lang.Object getValue(Tuple left,
                                 java.lang.Object right,
                                 java.lang.Object prefix,
                                 IOAVState state)

Get the value of an attribute from an object or tuple.

Specified by:

getValue in interface IValueExtractor

Parameters:

left - The left input tuple.

right - The right input object.

prefix - The prefix input object (last value from previous extractor in a chain).

state - The working memory.

isAffected

public boolean isAffected(int tupleindex,
                          OAVAttributeType attr)

Test if a constraint evaluator is affected from a change of a certain attribute.

Specified by:

isAffected in interface IValueExtractor

Parameters:

tupleindex - The tuple index.

attr - The attribute.

Returns:

True, if affected.

toString

public java.lang.String toString()

Get the string representation.

Overrides:

toString in class java.lang.Object

Returns:

The string representation.

getRelevantAttributes

public AttributeSet getRelevantAttributes()

Get the set of relevant attribute types.

Specified by:

getRelevantAttributes in interface IValueExtractor

Returns:

The relevant attribute types.

getIndirectAttributes

public AttributeSet getIndirectAttributes()

Get the set of indirect attribute types. I.e. attributes of objects, which are not part of an object conditions (e.g. for chained extractors)

Specified by:

getIndirectAttributes in interface IValueExtractor

Returns:

The relevant attribute types.