com.redhat.rhn.manager.channel

Class EusReleaseComparator

java.lang.Object

com.redhat.rhn.manager.channel.EusReleaseComparator

All Implemented Interfaces:

java.util.Comparator<EssentialChannelDto>

public class EusReleaseComparator
extends java.lang.Object
implements java.util.Comparator<EssentialChannelDto>

EusReleaseComparator

Compare two RHEL releases, where the behavior can differ depending on which version of RHEL we're dealing with. (RHEL 4 in particular needs special attention.)

"Release" in this context ends up appearing more like what we'd call a version, i.e. 5.3.0.3. Thus a simple string comparison will not suffice. (5.10 > 5.9)

Additionally, for all versions of RHEL, we may need to trim pieces of the version off to do the comparison.

Sample releases:

   RHEL 4: 7.6, 8, 9
   RHEL 5: 5.1.0.1, 5.2.0.2, 5.3.0.3
 

Constructor Summary

Constructors

Constructor and Description
EusReleaseComparator(java.lang.String rhelVersionIn) Constructor

Method Summary

Modifier and Type	Method and Description
int	compare(EssentialChannelDto chan1, EssentialChannelDto chan2) Compare two EUS channel releases.
int	compare(EssentialChannelDto dto, PackageEvr pevr) Compare a PackageEvr (specifically, a redhat-release PEVR) to the release/version of a specific EUS channel - specifically, "how does a system with redhat-release 'pever' compare to a particular EUS channel?" If the answer is "PEVR is same or greater", then the system with that redhat-release is allowed to subscribe to the specified channel.
int	compare(java.lang.String rhelRelease1, java.lang.String rhelRelease2) Compare two EUS channel releases.

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

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

Constructor Detail

EusReleaseComparator

public EusReleaseComparator(java.lang.String rhelVersionIn)

Constructor

Parameters:

rhelVersionIn - RHEL version we're comparing release for. (5Server, 4AS, 4ES)

Method Detail

compare

public int compare(EssentialChannelDto chan1,
                   EssentialChannelDto chan2)

Compare two EUS channel releases.

Specified by:

compare in interface java.util.Comparator<EssentialChannelDto>

Parameters:

chan1 - First channel.

chan2 - Second channel.

Returns:

1 if first is > second, 0 if they are equal, -1 if first is < second.

compare

public int compare(java.lang.String rhelRelease1,
                   java.lang.String rhelRelease2)

Compare two EUS channel releases.

Parameters:

rhelRelease1 - First channel release.

rhelRelease2 - Second channel release.

Returns:

1 if first is > second, 0 if they are equal, -1 if first is < second.

compare

public int compare(EssentialChannelDto dto,
                   PackageEvr pevr)

Compare a PackageEvr (specifically, a redhat-release PEVR) to the release/version of a specific EUS channel - specifically, "how does a system with redhat-release 'pever' compare to a particular EUS channel?" If the answer is "PEVR is same or greater", then the system with that redhat-release is allowed to subscribe to the specified channel.

Parameters:

dto - Channel-info we might want to subscribe to

pevr - PackageEvr of the redhat-release RPM that is installed on the system of interest

Returns:

1 if channel-eus-release is bigger then pevr.release, 0 is the same, or -1 if the package is for an 'older' EUS release