ImmutablePreference (J-Voting 0.0.3 API)

All Superinterfaces:

Preference

All Known Subinterfaces:

ImmutableAntiSymmetricPreference, ImmutableCompletePreference, ImmutableLinearPreference

All Known Implementing Classes:

ImmutableAntiSymmetricPreferenceImpl, ImmutableCompletePreferenceImpl, ImmutableLinearPreferenceImpl, ImmutablePreferenceImpl
```
public interface ImmutablePreference
extends Preference
```
An Immutable Preference is a preference that cannot be modified ImmutablePreference can’t represent the case where we know that a ≥ b and ignore whether b ≥ a. This class is useful when "what we know so far" can be represented using ≥ only; in contrast to needing both ≥ and > (as in: I know that a > b and know that b ≥ c but ignore whether b > c). To put it otherwise, what I ignore must be symmetric. Two immutable preferences are equal iff their graphs are equal.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ImmutableGraph<Alternative>`	`asGraph()`	In the graph : a relation from a to b means "a is at least as good as b".
`ImmutableSet<Alternative>`	`getAlternatives()`	The returned set reads through this object: if this object is mutable, any modification to this object modifies the returned set, and conversely.

Methods inherited from interface io.github.oliviercailloux.j_voting.preferences.Preference
getVoter

- Method Detail
  - asGraph
```
ImmutableGraph<Alternative> asGraph()
```
    In the graph : a relation from a to b means "a is at least as good as b". This graph can’t be modified, but is not necessarily immutable. Reflexive and transitive. This graph is immutable.
    
    Specified by:
    
    asGraph in interface Preference
    
    Returns:
    
    the Graph corresponding to the Preference.
  - getAlternatives
```
ImmutableSet<Alternative> getAlternatives()
```
    The returned set reads through this object: if this object is mutable, any modification to this object modifies the returned set, and conversely. This set is immutable.
    
    Specified by:
    
    getAlternatives in interface Preference
    
    Returns:
    
    alternatives's set