Class IntVarLocalSearchOperator

java.lang.Object
com.google.ortools.constraintsolver.BaseObject
com.google.ortools.constraintsolver.LocalSearchOperator
com.google.ortools.constraintsolver.IntVarLocalSearchOperator
Direct Known Subclasses:
BaseLns, ChangeValue
public class IntVarLocalSearchOperator extends LocalSearchOperator
Specialization of LocalSearchOperator built from an array of IntVars
which specifies the scope of the operator.
This class also takes care of storing current variable values in Start(),
keeps track of changes done by the operator and builds the delta.
The Deactivate() method can be used to perform Large Neighborhood Search.

  • Constructor Details

    • IntVarLocalSearchOperator

      public IntVarLocalSearchOperator(long cPtr, boolean cMemoryOwn)

    • IntVarLocalSearchOperator

      public IntVarLocalSearchOperator(IntVar[] vars, boolean keep_inverse_values)

    • IntVarLocalSearchOperator

      public IntVarLocalSearchOperator(IntVar[] vars)

  • Method Details

    • getCPtr

      public static long getCPtr(IntVarLocalSearchOperator obj)

    • swigRelease

      public static long swigRelease(IntVarLocalSearchOperator obj)

    • finalize

      protected void finalize()
      Overrides:
      finalize in class LocalSearchOperator

    • delete

      public void delete()
      Overrides:
      delete in class LocalSearchOperator

    • swigDirectorDisconnect

      protected void swigDirectorDisconnect()
      Overrides:
      swigDirectorDisconnect in class LocalSearchOperator

    • swigReleaseOwnership

      public void swigReleaseOwnership()
      Overrides:
      swigReleaseOwnership in class LocalSearchOperator

    • swigTakeOwnership

      public void swigTakeOwnership()
      Overrides:
      swigTakeOwnership in class LocalSearchOperator

    • HoldsDelta

      public boolean HoldsDelta()
      Overrides:
      HoldsDelta in class LocalSearchOperator

    • start

      public void start(Assignment assignment)
      This method should not be overridden. Override OnStart() instead which is
      called before exiting this method.
      Overrides:
      start in class LocalSearchOperator

    • isIncremental

      public boolean isIncremental()

    • size

      public int size()

    • value

      public long value(long index)
      Returns the value in the current assignment of the variable of given
      index.

    • var

      public IntVar var(long index)
      Returns the variable of given index.

    • SkipUnchanged

      public boolean SkipUnchanged(int arg0)

    • oldValue

      public long oldValue(long index)

    • PrevValue

      public long PrevValue(long index)

    • setValue

      public void setValue(long index, long value)

    • activated

      public boolean activated(long index)

    • activate

      public void activate(long index)

    • deactivate

      public void deactivate(long index)

    • ApplyChanges

      public boolean ApplyChanges(Assignment delta, Assignment deltadelta)

    • RevertChanges

      public void RevertChanges(boolean change_was_incremental)

    • addVars

      public void addVars(IntVar[] vars)

    • onStart

      public void onStart()
      Called by Start() after synchronizing the operator with the current
      assignment. Should be overridden instead of Start() to avoid calling
      IntVarLocalSearchOperator::Start explicitly.

    • oneNeighbor

      protected boolean oneNeighbor()
      Creates a new neighbor. It returns false when the neighborhood is
      completely explored.
      MakeNextNeighbor() in a subclass of IntVarLocalSearchOperator.