org.springmodules.validation.util.condition.range
Class NumberAwareComparableComparator

java.lang.Object
  org.springframework.util.comparator.ComparableComparator
      org.springmodules.validation.util.condition.range.NumberAwareComparableComparator

All Implemented Interfaces:

Comparator

public class NumberAwareComparableComparator
extends ComparableComparator

A comparator that compares Comparable instances but treats comparison of Number instances in a special manner. In order to support comparison of numbers regardless of their type, this comparator transform the numbers to BigDecimal and then does the comparison.

Author:

Uri Boness

Constructor Summary

NumberAwareComparableComparator()

Method Summary

int	compare(Object o1, Object o2) Compares the two given objects.
protected int	compareNumbers(Number n1, Number n2) Compares the two given numbers.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

NumberAwareComparableComparator

public NumberAwareComparableComparator()

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Compares the two given objects. Expects both of them to be Comparable instances.

Specified by:

compare in interface Comparator

Overrides:

compare in class ComparableComparator

See Also:

ComparableComparator.compare(Object, Object)

compareNumbers

protected int compareNumbers(Number n1,
                             Number n2)

Compares the two given numbers. These numbers are compared regardless of their type.

Parameters:

n1 - The first number.

n2 - The second number.

Returns:

possitive number if n1 > n2, negative number if n1 < n2, or 0 (Zero) if n1 == n2.