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org.mentawai.list
Class BaseListData.ValueComparator  view BaseListData.ValueComparator download BaseListData.ValueComparator.java

java.lang.Object
  extended byorg.mentawai.util.StringComparator
      extended byorg.mentawai.list.BaseListData.ValueComparator
All Implemented Interfaces:
java.util.Comparator
Enclosing class:
BaseListData

private static class BaseListData.ValueComparator
extends org.mentawai.util.StringComparator


Constructor Summary
private BaseListData.ValueComparator()
           
 
Method Summary
 int compare(java.lang.Object o1, java.lang.Object o2)
          Return an integer that is negative, zero or positive depending on whether the first argument is less than, equal to or greater than the second according to this ordering.
 
Methods inherited from class org.mentawai.util.StringComparator
removeAccents
 
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

BaseListData.ValueComparator

private BaseListData.ValueComparator()
Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)
Description copied from interface: java.util.Comparator
Return an integer that is negative, zero or positive depending on whether the first argument is less than, equal to or greater than the second according to this ordering. This method should obey the following contract:
  • if compare(a, b) < 0 then compare(b, a) > 0
  • if compare(a, b) throws an exception, so does compare(b, a)
  • if compare(a, b) < 0 and compare(b, c) < 0 then compare(a, c) < 0
  • if compare(a, b) == 0 then compare(a, c) and compare(b, c) must have the same sign
To be consistent with equals, the following additional constraint is in place:
  • if a.equals(b) or both a and b are null, then compare(a, b) == 0.

Although it is permissible for a comparator to provide an order inconsistent with equals, that should be documented.