Copyright © 2005 Scientific Applications. All Rights Reserved.

com.sciapp.treetable.dir
Class FileRowComparator

java.lang.Object
  extended by com.sciapp.treetable.dir.FileRowComparator
All Implemented Interfaces:
Comparator

public class FileRowComparator
extends Object
implements Comparator

FileRowComparator compares two FileRow objects by using their file attribute.


Constructor Summary
FileRowComparator()
          Creates a FileRowComparator.
 
Method Summary
 int compare(Object o1, Object o2)
          Compares its two arguments for order.
 
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

FileRowComparator

public FileRowComparator()
Creates a FileRowComparator.

Method Detail

compare

public int compare(Object o1,
                   Object o2)
Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

The implementor must ensure that sgn(compare(x, y)) == -sgn(compare(y, x)) for all x and y. (This implies that compare(x, y) must throw an exception if and only if compare(y, x) throws an exception.)

The implementor must also ensure that the relation is transitive: ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0.

Finally, the implementer must ensure that compare(x, y)==0 implies that sgn(compare(x, z))==sgn(compare(y, z)) for all z.

It is generally the case, but not strictly required that (compare(x, y)==0) == (x.equals(y)). Generally speaking, any comparator that violates this condition should clearly indicate this fact. The recommended language is "Note: this comparator imposes orderings that are inconsistent with equals."

Specified by:
compare in interface Comparator
Parameters:
o1 - the first object to be compared.
o2 - the second object to be compared.
Returns:
a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

Copyright © 2005 Scientific Applications. All Rights Reserved.