in src/main/java/org/apache/maven/artifact/ant/Pom.java [137:152]
protected void getPomFromAntProject( String refid )
{
if ( refid == null )
{
throw new BuildException( "POM refid is null." );
}
if ( getProject().getReference( refid ) == null )
{
throw new BuildException( "Unable to locate POM reference: '" + refid + "'" );
}
Pom thePom = (Pom) getProject().getReference( refid );
mavenProject = thePom.getMavenProject();
file = thePom.getFile();
}