Package jadex.rules.rulesystem.rete.extractors

Class MultifieldExtractor

java.lang.Object

jadex.rules.rulesystem.rete.extractors.MultifieldExtractor

All Implemented Interfaces:

IValueExtractor

public class MultifieldExtractor
extends java.lang.Object
implements IValueExtractor

A multifield extractor has the purpose of extracting a value or a collection of values from a collection type attribute.

Field Summary

Fields

Modifier and Type	Field	Description
protected OAVAttributeType	attr	The attribute.
protected int	subindex	The subindex.
protected int	tupleindex	The tupleindex.

Constructor Summary

Constructors

Constructor	Description
MultifieldExtractor(int tupleindex, OAVAttributeType attr, int subindex)	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	getSubindex()	Get the sub index.
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 tupleindex.

attr

protected OAVAttributeType attr

The attribute.

subindex

protected int subindex

The subindex.

Constructor Detail

MultifieldExtractor

public MultifieldExtractor(int tupleindex,
                           OAVAttributeType attr,
                           int subindex)

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.

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.

toString

public java.lang.String toString()

Get the string representation.

Overrides:

toString in class java.lang.Object

Returns:

The string representation.

getAttribute

public OAVAttributeType getAttribute()

Get the attribute.

getTupleIndex

public int getTupleIndex()

Get the tuple index.

getSubindex

public int getSubindex()

Get the sub index.

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