Incorrect documentation for writing a custom rule

The documentation at http://maven.apache.org/enforcer/enforcer-api/writing-a-custom-rule.html has the wrong dependencies and code examples for creating a custom rule.

It defines

<dependency>
  <groupId>org.apache.maven.enforcer</groupId>
  <artifactId>enforcer-api</artifactId>
  <version>${api.version}</version>
  </dependency>

instead of

<dependency>
  <groupId>org.apache.maven.shared</groupId>
  <artifactId>maven-enforcer-rule-api</artifactId>
  <version>1.0-alpha-2</version>
</dependency>

and so the code examples are incorrect because:

1. Incorrect imports:
   • The imports are for
     • org.apache.maven.enforcer.rule.api.EnforcerRule
     • org.apache.maven.enforcer.rule.api.EnforcerRuleException
     • org.apache.maven.enforcer.rule.api.EnforcerRuleHelper
   • instead of
     • org.apache.maven.shared.enforcer.rule.api.EnforcerRule
     • org.apache.maven.shared.enforcer.rule.api.EnforcerRuleException
     • org.apache.maven.shared.enforcer.rule.api.EnforcerRuleHelper.
   • Implementing import org.apache.maven.enforcer.rule.api.EnforcerRule causes the custom plugin invocation to fail with an ArrayStoreException as the expected type is import org.apache.maven.shared.enforcer.rule.api.EnforcerRule instead.
2. It shows implementing public String getCacheId(), public boolean isCacheable(), public boolean isResultValid( EnforcerRule arg0 ) which are no longer needed.