com.jidesoft.comparator

Class FastComparableComparator

java.lang.Object

com.jidesoft.comparator.FastComparableComparator

All Implemented Interfaces:

Serializable, Comparator<Object>

public class FastComparableComparator
extends Object
implements Comparator<Object>, Serializable

A Comparator that compares Comparable objects. Throws ClassCastExceptions if the objects are not Comparable, or if they are null. Different from ComparableComparator, it will not throw exception when the two compareTo methods don't provide an inverse result of each other as per the Comparable javadoc. We do so mainly to reduce one call to compareTo.
If both objects are null, they will be treated as equal. If one is null and the other is not, the null value will be treated as smaller then non-null value.

Author:

bayard@generationjava.com, JIDE Software

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FastComparableComparator() Constructs a FastComparableComparator.

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(Object o1, Object o2)
static FastComparableComparator	getInstance() Return a shared instance of a ComparableComparator.

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

FastComparableComparator

public FastComparableComparator()

Constructs a FastComparableComparator.

Method Detail

getInstance

public static FastComparableComparator getInstance()

Return a shared instance of a ComparableComparator. Developers are encouraged to use the comparator returned from this method instead of constructing a new instance to reduce allocation and GC overhead when multiple comparable comparators may be used in the same VM.

Returns:

an instance of ComparableComparator.

compare

public int compare(Object o1,
          Object o2)

Specified by:

compare in interface Comparator<Object>