ActiveRules (sonar-plugin-api 8.9)

```
@Immutable
@ScannerSide
public interface ActiveRules
```
The rules that are activated on the current project. Quality profiles are merged, so rules can relate to different repositories and languages.
Use org.sonar.api.batch.rule.internal.ActiveRulesBuilder available in sonar-plugin-api-impl to instantiate this component in unit tests.

Since:

4.2

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ActiveRule`	`find(RuleKey ruleKey)`	Find a `ActiveRule` by the associated rule key.
`java.util.Collection<ActiveRule>`	`findAll()`	All the active rules, whatever their repository and related language.
`ActiveRule`	`findByInternalKey(java.lang.String repository, java.lang.String internalKey)`	Find a `ActiveRule` by the associated internal key.
`java.util.Collection<ActiveRule>`	`findByLanguage(java.lang.String language)`	The active rules for a given language, like `java`
`java.util.Collection<ActiveRule>`	`findByRepository(java.lang.String repository)`	The active rules for a given repository, like `findbugs`

- Method Detail
  - find
```
@CheckForNull
ActiveRule find(RuleKey ruleKey)
```
    Find a ActiveRule by the associated rule key. null is returned if the rule does not exist or if the rule is not activated on any Quality profile associated with the project.
  - findAll
```
java.util.Collection<ActiveRule> findAll()
```
    All the active rules, whatever their repository and related language.
  - findByRepository
```
java.util.Collection<ActiveRule> findByRepository(java.lang.String repository)
```
    The active rules for a given repository, like findbugs
  - findByLanguage
```
java.util.Collection<ActiveRule> findByLanguage(java.lang.String language)
```
    The active rules for a given language, like java
  - findByInternalKey
```
@CheckForNull
ActiveRule findByInternalKey(java.lang.String repository,
                             java.lang.String internalKey)
```
    Find a ActiveRule by the associated internal key. null is returned if the rule does not exist or if the rule is not activated on any Quality profile associated with the project.