Package jadex.rules.rulesystem.rete.extractors

Class FunctionExtractor

java.lang.Object

jadex.rules.rulesystem.rete.extractors.FunctionExtractor

All Implemented Interfaces:

IValueExtractor

public class FunctionExtractor
extends java.lang.Object
implements IValueExtractor

A function extractor has the purpose to call a function and return the result value.

Field Summary

Fields

Modifier and Type	Field	Description
protected IValueExtractor[]	extractors	The extractors.
protected IFunction	function	The function.

Constructor Summary

Constructors

Constructor	Description
FunctionExtractor(IFunction function, IValueExtractor[] extractors)	Create a new evaluator.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Test for equality.
IFunction	getFunction()	Get the function.
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.
IValueExtractor[]	getValueExtractors()	Get the value extractors.
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

function

protected IFunction function

The function.

extractors

protected IValueExtractor[] extractors

The extractors.

Constructor Detail

FunctionExtractor

public FunctionExtractor(IFunction function,
                         IValueExtractor[] extractors)

Create a new evaluator.

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.

getValueExtractors

public IValueExtractor[] getValueExtractors()

Get the value extractors.

getFunction

public IFunction getFunction()

Get the function.

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