theory.smart.ebusiness.shoppingadvisor
Class ItemByDegreeItemComparator

java.lang.Object
  |
  +--theory.smart.ebusiness.shoppingadvisor.ItemByDegreeItemComparator

public class ItemByDegreeItemComparator

extends java.lang.Object

implements com.sun.java.util.collections.Comparator

Compares two ItemByDegree by obtaining their items and comparing the items' primary keys.

See Also:

ItemByDegree, Item

Method Summary

int	compare(java.lang.Object arg1, java.lang.Object arg2) Compares two ItemByDegree
static ItemByDegreeItemComparator	getInstance() A caching mechanism to improve the performance while instantiating ItemByDegreeItemComparators

Methods inherited from class java.lang.Object

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

Method Detail

compare

public int compare(java.lang.Object arg1,
                   java.lang.Object arg2)

Compares two ItemByDegree

Specified by:

compare in interface com.sun.java.util.collections.Comparator

Returns:

arg1.getItem().getPrimaryKey().compareTo( arg2.getItem().getPrimaryKey())

getInstance

public static ItemByDegreeItemComparator getInstance()

A caching mechanism to improve the performance while instantiating ItemByDegreeItemComparators

Returns:

a new instance if no instance exists or an existing instance