Package org.apache.maven.plugins.enforcer

Class DependencyConvergence

java.lang.Object

org.apache.maven.plugins.enforcer.DependencyConvergence

All Implemented Interfaces:

EnforcerRule

public class DependencyConvergence
extends Object
implements EnforcerRule

Author:

Rex Hoffman

Constructor Summary

Constructors

Constructor	Description
DependencyConvergence()

Method Summary

Modifier and Type	Method	Description
void	execute(EnforcerRuleHelper helper)	This is the interface into the rule.
String	getCacheId()	If your rule is cacheable, you must return a unique id when parameters or conditions change that would cause the result to be different.
boolean	isCacheable()	This tells the system if the results are cacheable at all.
boolean	isResultValid(EnforcerRule rule)	If the rule is cacheable and the same id is found in the cache, the stored results are passed to this method to allow double checking of the results.
void	setUniqueVersions(boolean uniqueVersions)

Methods inherited from class java.lang.Object

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

Constructor Detail

DependencyConvergence

public DependencyConvergence()

Method Detail

setUniqueVersions

public void setUniqueVersions(boolean uniqueVersions)

execute

public void execute(EnforcerRuleHelper helper)
             throws EnforcerRuleException

Description copied from interface: EnforcerRule

This is the interface into the rule. This method should throw an exception containing a reason message if the rule fails the check. The plugin will then decide based on the fail flag if it should stop or just log the message as a warning.

Specified by:

execute in interface EnforcerRule

Parameters:

helper - The helper provides access to the log, MavenSession and has helpers to get common components. It is also able to lookup components by class name.

Throws:

EnforcerRuleException - the enforcer rule exception

getCacheId

public String getCacheId()

If your rule is cacheable, you must return a unique id when parameters or conditions change that would cause the result to be different. Multiple cached results are stored based on their id. The easiest way to do this is to return a hash computed from the values of your parameters. If your rule is not cacheable, then the result here is not important, you may return anything.

Specified by:

getCacheId in interface EnforcerRule

Returns:

id to be used by the enforcer to determine uniqueness of cache results. The ids only need to be unique within a given rule implementation as the full key will be [classname]-[id]

isCacheable

public boolean isCacheable()

This tells the system if the results are cacheable at all. Keep in mind that during forked builds and other things, a given rule may be executed more than once for the same project. This means that even things that change from project to project may still be cacheable in certain instances.

Specified by:

isCacheable in interface EnforcerRule

Returns:

true if rule is cacheable

isResultValid

public boolean isResultValid(EnforcerRule rule)

If the rule is cacheable and the same id is found in the cache, the stored results are passed to this method to allow double checking of the results. Most of the time this can be done by generating unique ids, but sometimes the results of objects returned by the helper need to be queried. You may for example, store certain objects in your rule and then query them later.

Specified by:

isResultValid in interface EnforcerRule

Parameters:

rule -

Returns:

true if the stored results are valid for the same id.