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Interface jdsl.core.api.Comparator

public interface Comparator
A comparator does comparisons of objects in the universe the comparator is defined over. A comparator throws an InvalidElementException if passed a null element, or an element outside of its universe.

Version:
Mon Aug 11 14:57:22 EDT 1997
Author:
Mark Handy

Method Index

o isComparable(Object)
Tests whether this comparator can compare this object
o isEqualTo(Object, Object)
Tests equality of two objects in the universe over which this comparator is defined.
o isGreaterThan(Object, Object)
Tests strict order of two objects in the universe over which this comparator is defined.
o isGreaterThanOrEqualTo(Object, Object)
Tests non-strict order of two objects in the universe over which this comparator is defined.
o isLessThan(Object, Object)
Tests strict order of two objects in the universe over which this comparator is defined.
o isLessThanOrEqualTo(Object, Object)
Tests non-strict order of two objects in the universe over which this comparator is defined.

Methods

o isEqualTo 
 public abstract boolean isEqualTo(Object a,
                                   Object b) throws InvalidElementException
Tests equality of two objects in the universe over which this comparator is defined.

Returns:
whether a is equal to b
o isGreaterThan 
 public abstract boolean isGreaterThan(Object a,
                                       Object b) throws InvalidElementException
Tests strict order of two objects in the universe over which this comparator is defined.

Returns:
whether a is greater than b
o isLessThan 
 public abstract boolean isLessThan(Object a,
                                    Object b) throws InvalidElementException
Tests strict order of two objects in the universe over which this comparator is defined.

Returns:
whether a is less than b
o isGreaterThanOrEqualTo 
 public abstract boolean isGreaterThanOrEqualTo(Object a,
                                                Object b) throws InvalidElementException
Tests non-strict order of two objects in the universe over which this comparator is defined.

Returns:
whether a is greater than or equal to b
o isLessThanOrEqualTo 
 public abstract boolean isLessThanOrEqualTo(Object a,
                                             Object b) throws InvalidElementException
Tests non-strict order of two objects in the universe over which this comparator is defined.

Returns:
whether a is less than or equal to b
o isComparable 
 public abstract boolean isComparable(Object a)
Tests whether this comparator can compare this object

Returns:
whether a can be compared to other objects using this comparator 
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