org.bolson.vote
Class Approval

java.lang.Object
  org.bolson.vote.VotingSystem
      org.bolson.vote.Approval

All Implemented Interfaces:

java.io.Serializable

public class Approval
extends VotingSystem

Election method based on summation of Yes/No "good enough" votes. This class contains utility code for thresholding data at various points.

See Also:

Serialized Form

Field Summary

double	dthresh threshold for voteRating(double[])
float	fthresh threshold for voteRating(float[])
int	ithresh threshold for voteRating(int[])
protected int[]	talley

Fields inherited from class org.bolson.vote.VotingSystem

debug, NO_VOTE, numc

Constructor Summary

Approval(int numCandidates)

Method Summary

int[]	getWinners() Do processing if necessary, return winners.
java.lang.String	htmlSummary(java.lang.String[] names) A fancy html representation.
java.lang.String	name() Return name of this voting system.
java.lang.String	toString()
java.lang.String	toString(java.lang.String[] names) A more interesting representation.
int	voteRanking(int[] ranking) Choices above (ranked less than or equal to) "(numc+1) / 2" are voted as "approved".
int	voteRating(double[] rating)
int	voteRating(float[] rating)
int	voteRating(int[] rating)

Methods inherited from class org.bolson.vote.VotingSystem

checkRatedVote, getDebugHTML, getDebugText, getNumberOfCandidates, getWinners, getWinners, getWinners, init, isValidRankedVote, isValidRatedVote, normalize, normalize, normalize, normalize, normalize, normalizeL2, normalizeL2, normalizeL2, normalizeL2, normalizeL2, stretch, voteRating

Methods inherited from class java.lang.Object

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

Field Detail

ithresh

public int ithresh

threshold for voteRating(int[])

fthresh

public float fthresh

threshold for voteRating(float[])

dthresh

public double dthresh

threshold for voteRating(double[])

talley

protected int[] talley

Constructor Detail

Approval

public Approval(int numCandidates)

Method Detail

name

public java.lang.String name()

Description copied from class: VotingSystem

Return name of this voting system. This is a function so that it can potentially construct a detailed name based on options set in init().

Overrides:

name in class VotingSystem

Returns:

a descriptive name

voteRating

public int voteRating(int[] rating)

Specified by:

voteRating in class VotingSystem

Parameters:

rating - An array int[numc]. rating[i] is the rating of choice i. A rating can be any int value. Higher means more preferred. NO_VOTE for unrated.

Returns:

0 on success

voteRating

public int voteRating(float[] rating)

Specified by:

voteRating in class VotingSystem

Parameters:

rating - An array int[N]. rating[i] is the rating of choice i. A rating can be any int value. Higher means more preferred. NO_VOTE for unrated.

Returns:

0 on success

voteRating

public int voteRating(double[] rating)

Specified by:

voteRating in class VotingSystem

Parameters:

rating - An array int[N]. rating[i] is the rating of choice i. A rating can be any int value. Higher means more preferred. NO_VOTE for unrated.

Returns:

0 on success

voteRanking

public int voteRanking(int[] ranking)

Choices above (ranked less than or equal to) "(numc+1) / 2" are voted as "approved".

Specified by:

voteRanking in class VotingSystem

Parameters:

ranking - int[numc]

Returns:

0 on success

getWinners

public int[] getWinners()

Description copied from class: VotingSystem

Do processing if necessary, return winners.

It is recommended to cache the return value in such a way that calling this function again does not do complex recalculation. That cache should be cleared if voteRating or voteRanking is called.

Specified by:

getWinners in class VotingSystem

Returns:

indecies of winners (hopefully 1 of them)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toString

public java.lang.String toString(java.lang.String[] names)

Description copied from class: VotingSystem

A more interesting representation. Include the names of the choices voted upon in the representation.

Specified by:

toString in class VotingSystem

Parameters:

names - The names of the choices.

Returns:

state, with names!

htmlSummary

public java.lang.String htmlSummary(java.lang.String[] names)

Description copied from class: VotingSystem

A fancy html representation. Include the names of the choices voted upon in the representation.

Specified by:

htmlSummary in class VotingSystem

Parameters:

names - The names of the choices. May be null.

Returns:

state, with names!