|
public storeDomainFor ( |
||
| var | ||
| domain | Domain | |
| return | void | |
private bool revise(Variable xi, Variable xj, Constraint constraint,
CSP csp, DomainRestoreInfo info)
{
bool revised = false;
Assignment assignment = new Assignment();
foreach (Object iValue in csp.getDomain(xi))
{
assignment.setAssignment(xi, iValue);
bool consistentExtensionFound = false;
foreach (Object jValue in csp.getDomain(xj))
{
assignment.setAssignment(xj, jValue);
if (constraint.isSatisfiedWith(assignment))
{
consistentExtensionFound = true;
break;
}
}
if (!consistentExtensionFound)
{
info.storeDomainFor(xi, csp.getDomain(xi));
csp.removeValueFromDomain(xi, iValue);
revised = true;
}
}
return(revised);
}
private bool revise(Variable var, Constraint constraint,
Assignment assignment, CSP csp, DomainRestoreInfo info)
{
bool revised = false;
foreach (Object value in csp.getDomain(var))
{
assignment.setAssignment(var, value);
if (!constraint.isSatisfiedWith(assignment))
{
info.storeDomainFor(var, csp.getDomain(var));
csp.removeValueFromDomain(var, value);
revised = true;
}
assignment.removeAssignment(var);
}
return(revised);
}
/**
* Reduces the domain of the specified variable to the specified
* value and reestablishes arc-consistency. It is assumed that the
* provided CSP is arc-consistent before the call.
* @return An object which indicates success/failure and contains
* data to undo the operation.
*/
public DomainRestoreInfo reduceDomains(Variable var, Object value, CSP csp)
{
DomainRestoreInfo result = new DomainRestoreInfo();
Domain domain = csp.getDomain(var);
if (domain.contains(value))
{
if (domain.Count > 1)
{
FIFOQueue<Variable> queue = new FIFOQueue<Variable>();
queue.Add(var);
result.storeDomainFor(var, domain);
csp.setDomain(var, new Domain(new Object[] { value }));
reduceDomains(queue, csp, result);
}
}
else
{
result.setEmptyDomainFound(true);
}
return result.compactify();
}
/**
* Reduces the domain of the specified variable to the specified
* value and reestablishes arc-consistency. It is assumed that the
* provided CSP is arc-consistent before the call.
* @return An object which indicates success/failure and contains
* data to undo the operation.
*/
public DomainRestoreInfo reduceDomains(Variable var, Object value, CSP csp)
{
DomainRestoreInfo result = new DomainRestoreInfo();
Domain domain = csp.getDomain(var);
if (domain.contains(value))
{
if (domain.Count > 1)
{
FIFOQueue <Variable> queue = new FIFOQueue <Variable>();
queue.Add(var);
result.storeDomainFor(var, domain);
csp.setDomain(var, new Domain(new Object[] { value }));
reduceDomains(queue, csp, result);
}
}
else
{
result.setEmptyDomainFound(true);
}
return(result.compactify());
}
private bool revise(Variable xi, Variable xj, Constraint constraint,
CSP csp, DomainRestoreInfo info)
{
bool revised = false;
Assignment assignment = new Assignment();
foreach (Object iValue in csp.getDomain(xi))
{
assignment.setAssignment(xi, iValue);
bool consistentExtensionFound = false;
foreach (Object jValue in csp.getDomain(xj))
{
assignment.setAssignment(xj, jValue);
if (constraint.isSatisfiedWith(assignment))
{
consistentExtensionFound = true;
break;
}
}
if (!consistentExtensionFound)
{
info.storeDomainFor(xi, csp.getDomain(xi));
csp.removeValueFromDomain(xi, iValue);
revised = true;
}
}
return revised;
}
private bool revise(Variable var, Constraint constraint,
Assignment assignment, CSP csp, DomainRestoreInfo info)
{
bool revised = false;
foreach (Object value in csp.getDomain(var))
{
assignment.setAssignment(var, value);
if (!constraint.isSatisfiedWith(assignment))
{
info.storeDomainFor(var, csp.getDomain(var));
csp.removeValueFromDomain(var, value);
revised = true;
}
assignment.removeAssignment(var);
}
return revised;
}
