echopoint.table
Class DefaultSortableTableModelComparator

java.lang.Object
  echopoint.table.DefaultSortableTableModelComparator

All Implemented Interfaces:

java.util.Comparator, java.io.Serializable

public class DefaultSortableTableModelComparator

extends java.lang.Object

implements java.util.Comparator, java.io.Serializable

This default Comparator for SortableTableModel will sort Objects of type java.lang.String, java.lang.Number, java.util.Date, java.util.Calendar, java.lang.Boolean and those that implement java.lang.Comparable.

It also sorts next.echo.Label, next.echo.AbstractButton, next.echo.TextComponent, and next.echo.SelectField by calling the getText() and getSelectedItem() methods.

If the two objects to be compared are not assignable, then they will be compared via their toString() method.

All other objects will be compared via their toString() method.

Finally, "null" objects as sorted lower than everything else.

See Also:

Serialized Form

Constructor Summary

DefaultSortableTableModelComparator()

Method Summary

int	compare(java.lang.Object o1, java.lang.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

DefaultSortableTableModelComparator

public DefaultSortableTableModelComparator()

Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.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 java.util.Comparator

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

Throws:

java.lang.ClassCastException - if the arguments' types prevent them from being compared by this Comparator.