es.ants.felixgm.trmsim_wsn.trm.eigentrust
Class EigenTrust_Parameters

java.lang.Object
  es.ants.felixgm.trmsim_wsn.trm.TRMParameters
      es.ants.felixgm.trmsim_wsn.trm.eigentrust.EigenTrust_Parameters

public class EigenTrust_Parameters
extends TRMParameters

This class represents the set of parameters' values of EigenTrust.

An EigenTrust parameters file has the following structure:

    ####################################
    # EigenTrust parameters file
    ####################################
    windowSize=5
    epsilon=0.1
    preTrustedPeersPercentage=0.3
    preTrustedPeersWeight=0.25
    zeroTrustNodeSelectionProbability=0.2
 

This file can be downloaded here. But if any of the parameters can not be successfully extracted from the file, they are set to a default value.

Since:

0.2

Version:

0.4

Author:

Félix Gómez Mármol, Gregorio Martínez Pérez and Antonio Bernárdez

Field Summary

static java.lang.String

defaultParametersFileName Default parameters file name

Fields inherited from class es.ants.felixgm.trmsim_wsn.trm.TRMParameters

parameters, parametersFile, parametersFileHeader

Constructor Summary

EigenTrust_Parameters()
Creates a new instance of EigenTrust_Parameters setting them to their default values

EigenTrust_Parameters(java.lang.String fileName)
Creates a new instance of EigenTrust_Parameters from a given parameters file name

Method Summary

double	get_epsilon() Returns the epsilon parameter value
double	get_preTrustedPeersPercentage() Returns the percentage of pre-trusted peers value
double	get_preTrustedPeersWeight() Returns the weight of pre-trusted peers value
int	get_windowSize() Returns window size parameter value
double	get_zeroTrustNodeSelectionProbability() Returns the probability that a node with global trust value 0 is selected as service provider
void	set_epsilon(double epsilon) This method sets a new epsilon parameter value
void	set_preTrustedPeersPercentage(double preTrustedPeersPercentage) This method sets the percentage of pre-trusted peers value
void	set_preTrustedPeersWeight(double preTrustedPeersWeight) This method sets the weight of pre-trusted peers value
void	set_windowSize(int windowSize) Sets a new window size parameter value
void	set_zeroTrustNodeSelectionProbability(double zeroTrustNodeSelectionProbability) This method sets a new zeroTrustNodeSelectionProbability parameter value
java.lang.String	toString()

Methods inherited from class es.ants.felixgm.trmsim_wsn.trm.TRMParameters

getBooleanParameter, getDoubleParameter, getIntegerParameter, getStringParameter, saveToFile, saveToFile, setBooleanParameter, setDoubleParameter, setIntegerParameter, setStringParameter

Methods inherited from class java.lang.Object

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

Field Detail

defaultParametersFileName

public static final java.lang.String defaultParametersFileName

Default parameters file name

See Also:

Constant Field Values

Constructor Detail

EigenTrust_Parameters

public EigenTrust_Parameters()

Creates a new instance of EigenTrust_Parameters setting them to their default values

EigenTrust_Parameters

public EigenTrust_Parameters(java.lang.String fileName)
                      throws java.lang.Exception

Creates a new instance of EigenTrust_Parameters from a given parameters file name

Parameters:

fileName - EigenTrust parameters file name

Throws:

java.lang.Exception - If any parameter can not be successfully retrieved

Method Detail

get_windowSize

public int get_windowSize()

Returns window size parameter value

Returns:

window size parameter value

get_preTrustedPeersPercentage

public double get_preTrustedPeersPercentage()

Returns the percentage of pre-trusted peers value

Returns:

The percentage of pre-trusted peers value

get_preTrustedPeersWeight

public double get_preTrustedPeersWeight()

Returns the weight of pre-trusted peers value

Returns:

The weight of pre-trusted peers value

get_epsilon

public double get_epsilon()

Returns the epsilon parameter value

Returns:

The epsilon parameter value

get_zeroTrustNodeSelectionProbability

public double get_zeroTrustNodeSelectionProbability()

Returns the probability that a node with global trust value 0 is selected as service provider

Returns:

The probability that a node with global trust value 0 is selected as service provider

set_windowSize

public void set_windowSize(int windowSize)

Sets a new window size parameter value

Parameters:

windowSize - New window size parameter value

set_preTrustedPeersPercentage

public void set_preTrustedPeersPercentage(double preTrustedPeersPercentage)

This method sets the percentage of pre-trusted peers value

Parameters:

preTrustedPeersPercentage - New percentage of pre-trusted peers value

set_preTrustedPeersWeight

public void set_preTrustedPeersWeight(double preTrustedPeersWeight)

This method sets the weight of pre-trusted peers value

Parameters:

preTrustedPeersWeight - New weight of pre-trusted peers value

set_epsilon

public void set_epsilon(double epsilon)

This method sets a new epsilon parameter value

Parameters:

epsilon - New epsilon parameter value

set_zeroTrustNodeSelectionProbability

public void set_zeroTrustNodeSelectionProbability(double zeroTrustNodeSelectionProbability)

This method sets a new zeroTrustNodeSelectionProbability parameter value

Parameters:

zeroTrustNodeSelectionProbability - New zeroTrustNodeSelectionProbability parameter value

toString

public java.lang.String toString()

Specified by:

toString in class TRMParameters