Package jadex.rules.rulesystem.rete.extractors

Class ConstantExtractor

java.lang.Object

jadex.rules.rulesystem.rete.extractors.ConstantExtractor

All Implemented Interfaces:

IValueExtractor

public class ConstantExtractor
extends java.lang.Object
implements IValueExtractor

A constant extractor is responsible for extracting a constant value.

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.Object	value	The value.

Constructor Summary

Constructors

Constructor	Description
ConstantExtractor(java.lang.Object value)	Create a new extractor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Test for equality.
AttributeSet	getIndirectAttributes()	Get the set of indirect attribute types.
AttributeSet	getRelevantAttributes()	Get the set of relevant attribute types.
java.lang.Object	getValue()	Get the constant value.
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

value

protected java.lang.Object value

The value.

Constructor Detail

ConstantExtractor

public ConstantExtractor(java.lang.Object value)

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.

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.

getValue

public java.lang.Object getValue()

Get the constant value.

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