org.dataone.service.types.v1.comparators

Class SystemMetadataDateUploadedComparator

java.lang.Object

org.dataone.service.types.v1.comparators.SystemMetadataDateUploadedComparator

All Implemented Interfaces:

Comparator<SystemMetadata>

public class SystemMetadataDateUploadedComparator
extends Object
implements Comparator<SystemMetadata>

A Comparator that compares two SystemMetadata objects based on the DateUploaded property (Date) Note: this comparator imposes orderings that are inconsistent with equals.

Author:

tao

Constructor Summary

Constructors

Constructor and Description
SystemMetadataDateUploadedComparator()

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(SystemMetadata sysmeta1, SystemMetadata sysmeta2) Compares the order based on the uploaded date of the two SystemMetadata objects.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this comparator.

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemMetadataDateUploadedComparator

public SystemMetadataDateUploadedComparator()

Method Detail

compare

public int compare(SystemMetadata sysmeta1,
          SystemMetadata sysmeta2)
            throws ClassCastException,
                   NullPointerException

Compares the order based on the uploaded date of the two SystemMetadata objects. Note: this comparator imposes orderings that are inconsistent with equals.

Specified by:

compare in interface Comparator<SystemMetadata>

Parameters:

o1 -

o2 -

Returns:

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

Throws:

ClassCastException

NullPointerException

equals

public boolean equals(Object obj)

Indicates whether some other object is "equal to" this comparator.

Specified by:

equals in interface Comparator<SystemMetadata>

Overrides:

equals in class Object

Parameters:

obj -

Returns:

true if the specified object is an instance of the SysMetaUploadDateComparator; otherwise false.

Throws:

ClassCastException