Interface KeysetScrollDelegate.QueryStrategy<E,P>

Type Parameters:
E - property path expression type.
P - predicate type.
Enclosing class:
KeysetScrollDelegate
public static interface KeysetScrollDelegate.QueryStrategy<E,P>
Adapter to construct scroll queries.
Since:
3.1
Author:
Mark Paluch

  • Method Summary

    Modifier and Type
    Method
    Description
    @Nullable P
    and(List<P> intermediate)
    AND-combine the intermediate predicates.
    P
    compare(String property, E propertyExpression, @Nullable Object value)
    Create an equals-comparison object.
    P
    compare(Sort.Order order, E propertyExpression, @Nullable Object value)
    Create a comparison object according to the Sort.Order.
    E
    createExpression(String property)
    Create an expression object from the given property path.
    @Nullable P
    or(List<P> intermediate)
    OR-combine the intermediate predicates.

  • Method Details

    • createExpression

      E createExpression(String property)
      Create an expression object from the given property path.
      Parameters:
      property - must not be null.

    • compare

      P compare(Sort.Order order, E propertyExpression, @Nullable Object value)
      Create a comparison object according to the Sort.Order.

      Specifically, consider three cases:

      1. Value is not null: Compare according to Sort.Order. Also, when ordering with NULLS LAST, allow NULL values in the predicate
      2. Value is null and null values are not the maximum value: restrict to IS NOT NULL
      3. Otherwise: Disjunction (cannot compare)
      Parameters:
      order - must not be null.
      propertyExpression - must not be null.
      value - the value to compare with. Can be null.
      Returns:
      an object representing the comparison predicate.

    • compare

      P compare(String property, E propertyExpression, @Nullable Object value)
      Create an equals-comparison object.
      Parameters:
      property - name of the property.
      propertyExpression - must not be null.
      value - the value to compare with. Can be null.
      Returns:
      an object representing the comparison predicate.

    • and

      @Nullable P and(List<P> intermediate)
      AND-combine the intermediate predicates.
      Parameters:
      intermediate - the predicates to combine. Must not be null.
      Returns:
      a single predicate.

    • or

      @Nullable P or(List<P> intermediate)
      OR-combine the intermediate predicates.
      Parameters:
      intermediate - the predicates to combine. Must not be null.
      Returns:
      a single predicate.