Package org.optaplanner.core.api.domain.variable

Annotation Interface PreviousElementShadowVariable

@Target({METHOD,FIELD}) @Retention(RUNTIME) public @interface PreviousElementShadowVariable
Specifies that a bean property (or a field) references the previous element in the same PlanningListVariable. The previous element's index is 1 lower than this element's index. It is null if this element is the first element in the list variable.

It is specified on a getter of a java bean property (or a field) of a PlanningEntity class.

The source variable must be a list variable.

  • Element Details

    • sourceVariableName

      String sourceVariableName
      The source variable must be a list variable.

      When the Solver changes a genuine variable, it adjusts the shadow variable accordingly. In practice, the Solver ignores shadow variables (except for consistency housekeeping).

      Returns:
      property name of the list variable that contains instances of this planning value