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# Class sdsu.compare.ReverseOrderComparer

    java.lang.Object
       |
       +----sdsu.compare.Comparer
               |
               +----sdsu.compare.ReverseOrderComparer

public class ReverseOrderComparer
extends Comparer

A comparer to reverse the order used by a Comparer. For example, an IntegerComparer will evaluate lessThen( 3, 10 ) as true. A ReverseOrder on an IntegerComparer will evaluate lessThen( 3, 10 ) as false. Useful for reversing the order of a sort list.

Author:
  Roger Whitney (whitney@cs.sdsu.edu)

##

equals(Object, Object)
  Returns true if the leftOperand is equal to the rightOperand.
getInstance(Comparer)
  Returns a Comparer with order reversed from the Comparer originalOrder.
greaterThan(Object, Object)
  Returns true if the leftOperand is greater than the rightOperand.
greaterThanOrEqual(Object, Object)
  Returns true if the leftOperand is greater than or equal the rightOperand.
lessThan(Object, Object)
  Returns true if the leftOperand is less than the rightOperand.
lessThanOrEqual(Object, Object)
  Returns true if the leftOperand is less than or equal to the rightOperand.

##

getInstance

     public static Comparer getInstance(Comparer originalOrder)

  Returns a Comparer with order reversed from the Comparer originalOrder. If originalOrder is already aReverseOrder object, the ReversOrder objects are not nested. The Comparer inside of the originalOrder is used directly

lessThan

     public final boolean lessThan(Object leftOperand,
                                   Object rightOperand) throws ClassCastException

  Returns true if the leftOperand is less than the rightOperand.

  Throws: ClassCastException
    If operand objects are not proper type. ClassCastException is a RuntimeException, so compiler does not force you to catch this exception.
  Overrides:
    lessThan in class Comparer

greaterThan

     public final boolean greaterThan(Object leftOperand,
                                      Object rightOperand) throws ClassCastException

  Returns true if the leftOperand is greater than the rightOperand.

  Throws: ClassCastException
    If operand objects are not proper type. ClassCastException is a RuntimeException, so compiler does not force you to catch this exception.
  Overrides:
    greaterThan in class Comparer

equals

     public final boolean equals(Object leftOperand,
                                 Object rightOperand) throws ClassCastException

  Returns true if the leftOperand is equal to the rightOperand.

  Throws: ClassCastException
    If operand objects are not proper type. ClassCastException is a RuntimeException, so compiler does not force you to catch this exception.
  Overrides:
    equals in class Comparer

lessThanOrEqual

     public final boolean lessThanOrEqual(Object leftOperand,
                                          Object rightOperand) throws ClassCastException

  Returns true if the leftOperand is less than or equal to the rightOperand.

  Throws: ClassCastException
    If operand objects are not proper type. ClassCastException is a RuntimeException, so compiler does not force you to catch this exception.
  Overrides:
    lessThanOrEqual in class Comparer

greaterThanOrEqual

     public final boolean greaterThanOrEqual(Object leftOperand,
                                             Object rightOperand) throws ClassCastException

  Returns true if the leftOperand is greater than or equal the rightOperand.

  Throws: ClassCastException
    If operand objects are not proper type. ClassCastException is a RuntimeException, so compiler does not force you to catch this exception.
  Overrides:
    greaterThanOrEqual in class Comparer

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