Package org.springframework.expression

Interface TypeComparator

All Known Implementing Classes:
StandardTypeComparator
public interface TypeComparator
Instances of a type comparator should be able to compare pairs of objects for equality. The specification of the return value is the same as for Comparable.
Since:
3.0
Author:
Andy Clement
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    canCompare(Object firstObject, Object secondObject)
    Return true if the comparator can compare these two objects.
    int
    compare(Object firstObject, Object secondObject)
    Compare two given objects.

  • Method Details

    • canCompare

      boolean canCompare(@Nullable Object firstObject, @Nullable Object secondObject)
      Return true if the comparator can compare these two objects.
      Parameters:
      firstObject - the first object
      secondObject - the second object
      Returns:
      true if the comparator can compare these objects

    • compare

      int compare(@Nullable Object firstObject, @Nullable Object secondObject) throws EvaluationException
      Compare two given objects.
      Parameters:
      firstObject - the first object
      secondObject - the second object
      Returns:
      0 if they are equal, a negative integer if the first is smaller than the second, or a positive integer if the first is larger than the second
      Throws:
      EvaluationException - if a problem occurs during comparison (or if they are not comparable in the first place)
      See Also: