choco.real.search
Class AssignInterval

java.lang.Object
  choco.branch.AbstractBranching
      choco.search.AbstractIntBranching
          choco.real.search.AssignInterval

All Implemented Interfaces:

Branching, IntBranching

public class AssignInterval
extends AbstractIntBranching
implements IntBranching

A binary branching assigning interval to subinterval.

Field Summary

protected IValIterator	valIterator
protected RealVarSelector	varSelector

Fields inherited from class choco.branch.AbstractBranching

LOG_DECISION_MSG, LOG_DOWN_MSG, LOG_UP_MSG, logger, manager, nextBranching

Constructor Summary

AssignInterval(RealVarSelector varSelector, IValIterator valIterator)

Method Summary

boolean	branchOn(java.lang.Object x, int n) Deprecated. replaced by the management incremental search (with a stack of BranchingTrace storing the environment (local variables) associated to each choice point
boolean	finishedBranching(java.lang.Object x, int i) Checks whether all branches have already been explored at the current choice point.
java.lang.String	getDecisionLogMsg(int i) used for logging messages related to the search tree
int	getFirstBranch(java.lang.Object x) Computes the search index of the first branch of the choice point.
int	getNextBranch(java.lang.Object x, int i) Computes the search index of the next branch of the choice point.
void	goDownBranch(java.lang.Object x, int i) Performs the action, so that we go down a branch from the current choice point.
void	goUpBranch(java.lang.Object x, int i) Performs the action, so that we go up the current branch to the father choice point.
java.lang.Object	selectBranchingObject() selecting the object under scrutiny (that object on which an alternative will be set)

Methods inherited from class choco.search.AbstractIntBranching

explore, logDownBranch, logUpBranch

Methods inherited from class choco.branch.AbstractBranching

getNextBranching, setNextBranching, setSolver

Methods inherited from class java.lang.Object

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

Methods inherited from interface choco.branch.IntBranching

explore

Field Detail

varSelector

protected RealVarSelector varSelector

valIterator

protected IValIterator valIterator

Constructor Detail

AssignInterval

public AssignInterval(RealVarSelector varSelector,
                      IValIterator valIterator)

Method Detail

selectBranchingObject

public java.lang.Object selectBranchingObject()

Description copied from interface: Branching

selecting the object under scrutiny (that object on which an alternative will be set)

Specified by:

selectBranchingObject in interface Branching

Returns:

the object on which an alternative will be set (often a variable)

branchOn

public boolean branchOn(java.lang.Object x,
                        int n)
                 throws ContradictionException

Deprecated. replaced by the management incremental search (with a stack of BranchingTrace storing the environment (local variables) associated to each choice point

Description copied from interface: IntBranching

A method exploring the i-th branch of choice point.

Specified by:

branchOn in interface IntBranching

Parameters:

x - the current branching object

n - the index of the branch

Returns:

true if the subtree below that branch lead to a solution or not

Throws:

ContradictionException - if a domain empties or a contradiction is infered

goDownBranch

public void goDownBranch(java.lang.Object x,
                         int i)
                  throws ContradictionException

Description copied from interface: IntBranching

Performs the action, so that we go down a branch from the current choice point.

Specified by:

goDownBranch in interface IntBranching

Overrides:

goDownBranch in class AbstractIntBranching

Parameters:

x - the object on which the alternative is set

i - the label of the branch that we want to go down

Throws:

ContradictionException - if a domain empties or a contradiction is infered

goUpBranch

public void goUpBranch(java.lang.Object x,
                       int i)
                throws ContradictionException

Description copied from interface: IntBranching

Performs the action, so that we go up the current branch to the father choice point.

Specified by:

goUpBranch in interface IntBranching

Overrides:

goUpBranch in class AbstractIntBranching

Parameters:

x - the object on which the alternative has been set at the father choice point

i - the label of the branch that has been travelled down from the father choice point

Throws:

ContradictionException - if a domain empties or a contradiction is infered

getFirstBranch

public int getFirstBranch(java.lang.Object x)

Description copied from interface: IntBranching

Computes the search index of the first branch of the choice point.

Specified by:

getFirstBranch in interface IntBranching

Parameters:

x - the object on which the alternative is set

Returns:

the index of the first branch

getNextBranch

public int getNextBranch(java.lang.Object x,
                         int i)

Description copied from interface: IntBranching

Computes the search index of the next branch of the choice point.

Specified by:

getNextBranch in interface IntBranching

Parameters:

x - the object on which the alternative is set

i - the index of the current branch

Returns:

the index of the next branch

finishedBranching

public boolean finishedBranching(java.lang.Object x,
                                 int i)

Description copied from interface: IntBranching

Checks whether all branches have already been explored at the current choice point.

Specified by:

finishedBranching in interface IntBranching

Parameters:

x - the object on which the alternative is set

i - the index of the last branch

Returns:

true if no more branches can be generated

getDecisionLogMsg

public java.lang.String getDecisionLogMsg(int i)

Description copied from class: AbstractBranching

used for logging messages related to the search tree

Specified by:

getDecisionLogMsg in class AbstractBranching

Returns:

an string that will be printed between the branching object and the branch index Suggested implementations return LOG_DECISION_MSG[0] or LOG_DECISION_MSG[branchIndex]