ConstraintDomination

java.lang.Object
- org.opt4j.core.domination.ConstraintDomination

All Implemented Interfaces:

DominationStrategy
```
public class ConstraintDomination
extends Object
implements DominationStrategy
```
This class implements DominationStrategy. The dominance relation is constraint-domination as described in K. Deb, A. Pratap, S. Agarwal, and T. Meyarivan, "A fast and elitist multiobjective genetic algorithm : Nsga-ii," Evolutionary Computation, IEEETransactions on, vol. 6, no. 2, pp. 182-197, August 2002.

It needs a ConstraintChecker that checks infeasibility and/or satisfaction constraints.

See Also:

DominationStrategy, ConstraintDomination

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`protected class`	`ConstraintDomination.ConstrainDominationInformation`	Data structure to save information about objectives in the cache of the strategy class `ConstraintDomination`.

Field Summary

Fields
Modifier and Type	Field	Description
`protected ConcurrentHashMap<Objectives,ConstraintDomination.ConstrainDominationInformation>`	`cache`
`protected ConstraintChecker`	`constraintChecker`
`protected DominationStrategy`	`feasibleStrategy`

Constructor Summary

Constructors
Constructor Description

ConstraintDomination(ConstraintChecker checker, DominationStrategy feasibleStrategy)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`dominates(Objectives o1, Objectives o2)`	Checks two `Objectives` for domination.
`boolean`	`weaklyDominates(Objectives o1, Objectives o2)`	Checks two `Objectives` for weak domination.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - constraintChecker
```
protected ConstraintChecker constraintChecker
```
  - feasibleStrategy
```
protected DominationStrategy feasibleStrategy
```
  - cache
```
protected ConcurrentHashMap<Objectives,ConstraintDomination.ConstrainDominationInformation> cache
```
- Constructor Detail
  - ConstraintDomination
```
@Inject
public ConstraintDomination(ConstraintChecker checker,
                            DominationStrategy feasibleStrategy)
```
- Method Detail
  - dominates
```
public boolean dominates(Objectives o1,
                         Objectives o2)
```
    Checks two Objectives for domination. The dominance relation is Constraint-Domination.
    
    Specified by:
    
    dominates in interface DominationStrategy
    
    Parameters:
    
    o1 - the objectives to check
    
    o2 - the objectives to compare with
    
    Returns:
    
    true, if o1 dominates o2
    false, otherwise
  - weaklyDominates
```
public boolean weaklyDominates(Objectives o1,
                               Objectives o2)
```
    Checks two Objectives for weak domination. The dominance relation is Constraint-Domination.
    
    Specified by:
    
    weaklyDominates in interface DominationStrategy
    
    Parameters:
    
    o1 - the objectives to check
    
    o2 - the objectives to compare with
    
    Returns:
    
    true, if o1 weakly dominates o2
    false, otherwise