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## org.optaplanner.core.impl.heuristic.selector.move.generic
Class ChangeMoveSelector

    java.lang.Object
      org.optaplanner.core.impl.heuristic.selector.AbstractSelector
          org.optaplanner.core.impl.heuristic.selector.move.AbstractMoveSelector
              org.optaplanner.core.impl.heuristic.selector.move.generic.GenericMoveSelector
                  org.optaplanner.core.impl.heuristic.selector.move.generic.ChangeMoveSelector

All Implemented Interfaces:
  Iterable<Move>, EventListener, IterableSelector<Move>, MoveSelector, Selector, SolverPhaseLifecycleListener, SolverLifecycleListener

    public class ChangeMoveSelector

extends GenericMoveSelector

Field Summary
`protected boolean` | `chained`
`protected EntitySelector` | `entitySelector`
`protected boolean` | `randomSelection`
`protected ValueSelector` | `valueSelector`

Fields inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
`logger, solverPhaseLifecycleSupport, workingRandom`

Constructor Summary
`ChangeMoveSelector(EntitySelector entitySelector, ValueSelector valueSelector, boolean randomSelection)`

Method Summary
`long` | `getSize()` A random JIT `Selector` with `Selector.isNeverEnding()` true should return a size as if it would be able to return each distinct element only once, because the size can be used in `SelectionProbabilityWeightFactory`.
`boolean` | `isCountable()` If false, then `Selector.isNeverEnding()` is true.
`boolean` | `isNeverEnding()` Is true if `Selector.isCountable()` is false or if this selector is in random order (for most cases).
`Iterator<Move>` | `iterator()`
`String` | `toString()`

Methods inherited from class org.optaplanner.core.impl.heuristic.selector.AbstractSelector
`getCacheType, phaseEnded, phaseStarted, solvingEnded, solvingStarted, stepEnded, stepStarted`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.optaplanner.core.impl.heuristic.selector.Selector
`getCacheType`

Methods inherited from interface org.optaplanner.core.impl.phase.event.SolverPhaseLifecycleListener
`phaseEnded, phaseStarted, stepEnded, stepStarted`

Methods inherited from interface org.optaplanner.core.impl.solver.event.SolverLifecycleListener
`solvingEnded, solvingStarted`

Field Detail

### entitySelector

    protected final EntitySelector entitySelector

### valueSelector

    protected final ValueSelector valueSelector

### randomSelection

    protected final boolean randomSelection

### chained

    protected final boolean chained

Constructor Detail

### ChangeMoveSelector

    public ChangeMoveSelector(EntitySelector entitySelector,
                              ValueSelector valueSelector,
                              boolean randomSelection)

Method Detail

### isCountable

    public boolean isCountable()

  Description copied from interface: `Selector`
  If false, then `Selector.isNeverEnding()` is true.

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

### isNeverEnding

    public boolean isNeverEnding()

  Description copied from interface: `Selector`
  Is true if `Selector.isCountable()` is false or if this selector is in random order (for most cases). Is never true when this selector is in shuffled order (which is less scalable but more exact).

  Returns:
    true if the `Iterator.hasNext()` of the `Iterator` created by `Iterable.iterator()` never returns false (except when it's empty).

### getSize

    public long getSize()

  Description copied from interface: `IterableSelector`
  A random JIT `Selector` with `Selector.isNeverEnding()` true should return a size as if it would be able to return each distinct element only once, because the size can be used in `SelectionProbabilityWeightFactory`.

  Returns:
    the approximate number of elements generated by this `Selector`, always >= 0

### iterator

    public Iterator<Move> iterator()

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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