Package jadex.rules.rulesystem.rete.extractors

Class TupleExtractor

java.lang.Object

jadex.rules.rulesystem.rete.extractors.TupleExtractor

All Implemented Interfaces:

IValueExtractor

Direct Known Subclasses:

JavaTupleExtractor

public class TupleExtractor
extends java.lang.Object
implements IValueExtractor

Extractor for fetching a value from a rete tuple.

Field Summary

Fields

Modifier and Type	Field	Description
protected OAVAttributeType	attr	The attribute type.
protected java.lang.Object	key	The key value.
protected int	tupleindex	The tuple index.

Constructor Summary

Constructors

Constructor	Description
TupleExtractor(int tupleindex, OAVAttributeType attr)	Create a new extractor.
TupleExtractor(int tupleindex, OAVAttributeType attr, java.lang.Object key)	Create a new extractor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Test for equality.
OAVAttributeType	getAttribute()	Get the attribute.
AttributeSet	getIndirectAttributes()	Get the set of indirect attribute types.
AttributeSet	getRelevantAttributes()	Get the set of relevant attribute types.
int	getTupleIndex()	Get the tuple index.
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.
int	hashCode()	The hash code.
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, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

tupleindex

protected int tupleindex

The tuple index.

attr

protected OAVAttributeType attr

The attribute type.

key

protected java.lang.Object key

The key value.

Constructor Detail

TupleExtractor

public TupleExtractor(int tupleindex,
                      OAVAttributeType attr)

Create a new extractor.

TupleExtractor

public TupleExtractor(int tupleindex,
                      OAVAttributeType attr,
                      java.lang.Object key)

Create a new extractor.

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.

getAttribute

public OAVAttributeType getAttribute()

Get the attribute.

Returns:

The attribute.

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.

getTupleIndex

public int getTupleIndex()

Get the tuple index.

Returns:

The tuple index.

toString

public java.lang.String toString()

Get the string representation.

Overrides:

toString in class java.lang.Object

Returns:

The string representation.

hashCode

public int hashCode()

The hash code.

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Test for equality.

Overrides:

equals in class java.lang.Object