org.onosproject.ui.table.cell

Class AbstractCellComparator

java.lang.Object

org.onosproject.ui.table.cell.AbstractCellComparator

All Implemented Interfaces:

CellComparator

Direct Known Subclasses:

DefaultCellComparator

public abstract class AbstractCellComparator
extends Object
implements CellComparator

Base implementation of a CellComparator. This class takes care of dealing with null inputs; subclasses should implement their comparison knowing that both inputs are guaranteed to be non-null.

Constructor Summary

Constructors

Constructor and Description
AbstractCellComparator()

Method Summary

Modifier and Type	Method and Description
int	compare(Object o1, Object o2) Compares its two arguments for order.
protected abstract int	nonNullCompare(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

Constructor Detail

AbstractCellComparator

public AbstractCellComparator()

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Description copied from interface: CellComparator

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.

Note that nulls are permitted, and should be sorted to the beginning of an ascending sort; i.e. null is considered to be "smaller" than non-null values.

Specified by:

compare in interface CellComparator

Parameters:

o1 - the first object to be compared

o2 - the second object to be compared

Returns:

an integer representing relative ordering

See Also:

Comparator.compare(Object, Object)

nonNullCompare

protected abstract int nonNullCompare(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.

Note that both objects are guaranteed to be non-null.

Parameters:

o1 - the first object to be compared

o2 - the second object to be compared

Returns:

an integer representing relative ordering

Throws:

ClassCastException - if the arguments' types prevent them from being compared by this comparator

See Also:

Comparator.compare(Object, Object)