SetRandomNeighbor (org.choco-solver-choco-solver 4.10.2 API)

java.lang.Object
- org.chocosolver.solver.search.loop.lns.neighbors.SetRandomNeighbor

All Implemented Interfaces:

ICause, INeighbor
```
public class SetRandomNeighbor
extends Object
implements INeighbor
```
A random LNS neighbor for a set variable This class serves mostly as an example on how to use LNS with set variables.

Since:

18/01/19

Author:

Jean-Guillaume Fages

Field Summary

Fields
Modifier and Type Field Description

protected Random rd

protected gnu.trove.list.array.TIntArrayList value

protected SetVar var

Constructor Summary

Constructors
Constructor Description

SetRandomNeighbor(SetVar variable)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`fixSomeVariables()`	Freezes some variables in order to have a fast computation.
`void`	`loadFromSolution(Solution solution)`	Load a solution and record it
`void`	`recordSolution()`	Record values of decision variables to freeze some ones during the next LNS run

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

Methods inherited from interface org.chocosolver.solver.ICause
explain, forEachIntVar

Methods inherited from interface org.chocosolver.solver.search.loop.lns.neighbors.INeighbor
init, isSearchComplete, restrictLess

- Field Detail
  - var
```
protected final SetVar var
```
  - value
```
protected final gnu.trove.list.array.TIntArrayList value
```
  - rd
```
protected final Random rd
```
- Constructor Detail
  - SetRandomNeighbor
```
public SetRandomNeighbor(SetVar variable)
```
- Method Detail
  - recordSolution
```
public void recordSolution()
```
    Description copied from interface: INeighbor
    
    Record values of decision variables to freeze some ones during the next LNS run
    
    Specified by:
    
    recordSolution in interface INeighbor
  - fixSomeVariables
```
public void fixSomeVariables()
                      throws ContradictionException
```
    Description copied from interface: INeighbor
    
    Freezes some variables in order to have a fast computation. The fixed variables are declared as decisions in the decision path.
    
    Specified by:
    
    fixSomeVariables in interface INeighbor
    
    Throws:
    
    ContradictionException
  - loadFromSolution
```
public void loadFromSolution(Solution solution)
```
    Description copied from interface: INeighbor
    
    Load a solution and record it
    
    Specified by:
    
    loadFromSolution in interface INeighbor
    
    Parameters:
    
    solution - a solution to record