Package sprouts

Interface ValsDelegate<T>

Type Parameters:
T - The type of the value wrapped by the delegated property...
public interface ValsDelegate<T>
A context object passed to the various types of change listeners registered in property lists such as Vals and Vars. It provides helpful context information about the change, such as the previous and current value of the property, the index of the property in the list, and type of change.

  • Method Summary

    Modifier and Type
    Method
    Description
    SequenceChange
    change()
    The type of change that occurred in the property list.
    Vals<T>
    currentValues()
    Exposes a read only property list after the change has been applied.
    Optional<Integer>
    index()
    Exposes the index at which the SequenceChange on the property list took place.
    Note that in case of the type of mutation be non-specific to a particular index, like a list clear or a list sort, this method will return an empty Optional.
    Vals<T>
    newValues()
    Exposes a read only property list after the change has been applied, which contains the new values in the property list.
    Vals<T>
    oldValues()
    Exposes a read only property list of old values which were removed from the property list.

  • Method Details

    • change

      SequenceChange change()
      The type of change that occurred in the property list. This information can be used to perform different actions that are specific to the type of change.
      Returns:
      The mutation type of the change which may be one of the following:

    • index

      Optional<Integer> index()
      Exposes the index at which the SequenceChange on the property list took place.
      Note that in case of the type of mutation be non-specific to a particular index, like a list clear or a list sort, this method will return an empty Optional.
      Returns:
      The index at which a list mutation took place or an empty Optional if the change does not involve a particular index, like a list clear or a list sort.

    • oldValues

      Vals<T> oldValues()
      Exposes a read only property list of old values which were removed from the property list.
      Returns:
      An immutable copy of removed properties in the property list before the change has been applied.

    • newValues

      Vals<T> newValues()
      Exposes a read only property list after the change has been applied, which contains the new values in the property list.
      Returns:
      An immutable copy of new properties in the property list after the change has been applied.

    • currentValues

      Vals<T> currentValues()
      Exposes a read only property list after the change has been applied.
      Returns:
      An immutable copy of the property list after the change has been applied.