org.optaplanner.core.impl.domain.valuerange.descriptor

## Interface ValueRangeDescriptor<Solution_>

- Type Parameters:
    `Solution_` - the solution type, the class with the `PlanningSolution` annotation
  All Known Subinterfaces:
    EntityIndependentValueRangeDescriptor<Solution_>
  All Known Implementing Classes:
    AbstractFromPropertyValueRangeDescriptor, AbstractValueRangeDescriptor, CompositeValueRangeDescriptor, FromEntityPropertyValueRangeDescriptor, FromSolutionPropertyValueRangeDescriptor

      public interface ValueRangeDescriptor<Solution_>

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `ValueRange<?>` | `extractValueRange(Solution_ solution, Object entity)`
    `GenuineVariableDescriptor<Solution_>` | `getVariableDescriptor()`
    `boolean` | `isCountable()`
    `boolean` | `isEntityIndependent()` If this method return true, this instance is safe to cast to `EntityIndependentValueRangeDescriptor`, otherwise it requires an entity to determine the `ValueRange`.
    `boolean` | `mightContainEntity()`

- - ### Method Detail

    - #### getVariableDescriptor

          GenuineVariableDescriptor<Solution_> getVariableDescriptor()

      Returns:
        never null

    - #### isCountable

          boolean isCountable()

      Returns:
        true if the `ValueRange` is countable (for example a double value range between 1.2 and 1.4 is not countable)

    - #### isEntityIndependent

          boolean isEntityIndependent()

      If this method return true, this instance is safe to cast to `EntityIndependentValueRangeDescriptor`, otherwise it requires an entity to determine the `ValueRange`.
      Returns:
        true if the `ValueRange` is the same for all entities of the same solution

    - #### mightContainEntity

          boolean mightContainEntity()

      Returns:
        true if the `ValueRange` might contain a planning entity instance (not necessarily of the same entity class as this entity class of this descriptor.

    - #### extractValueRange

          ValueRange<?> extractValueRange(Solution_ solution,
                                          Object entity)

      Parameters:
        `solution` - never null
        `entity` - never null. To avoid this parameter, use `EntityIndependentValueRangeDescriptor.extractValueRange(Solution_)` instead.
      Returns:
        never null

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