com.helger.commons.compare

Class AbstractDoubleComparator<DATATYPE>

java.lang.Object

com.helger.commons.compare.AbstractComparator<DATATYPE>

com.helger.commons.compare.AbstractDoubleComparator<DATATYPE>

Type Parameters:

DATATYPE - The data type to be compared. Must somehow have a value that can be compared as a double value.

All Implemented Interfaces:

ISerializableComparator<DATATYPE>, Serializable, Comparator<DATATYPE>

public abstract class AbstractDoubleComparator<DATATYPE>
extends AbstractComparator<DATATYPE>

Abstract comparator that handles values that can be represented as double values.

Author:

Philip Helger

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AbstractDoubleComparator()

Method Summary

Modifier and Type	Method and Description
protected abstract double	getAsDouble(DATATYPE aObject) Protected method to convert the passed object into a double value.
protected int	mainCompare(DATATYPE aElement1, DATATYPE aElement2)

Methods inherited from class com.helger.commons.compare.AbstractComparator

compare, getNestedComparator, getSortOrder, isNullValuesComeFirst, setNestedComparator, setNullValuesComeFirst, setSortOrder, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

AbstractDoubleComparator

public AbstractDoubleComparator()

Method Detail

getAsDouble

protected abstract double getAsDouble(@Nonnull
                                      DATATYPE aObject)

Protected method to convert the passed object into a double value.

Parameters:

aObject - The source object

Returns:

The result double value.

mainCompare

protected final int mainCompare(@Nonnull
                                DATATYPE aElement1,
                                @Nonnull
                                DATATYPE aElement2)

Specified by:

mainCompare in class AbstractComparator<DATATYPE>

Parameters:

aElement1 - First element to compare. Never null.

aElement2 - Second element to compare. Never null.

Returns:

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