static final String MAVEN_COMPILER_ENCODING_KEY = "project.build.sourceEncoding";
@Override
public boolean isInstalled()
{
MavenFacet maven = getFaceted().getFacet(MavenFacet.class);
Model pom = maven.getModel();
Properties properties = pom.getProperties();
List<String> keys = Arrays.asList(MAVEN_COMPILER_SOURCE_KEY, MAVEN_COMPILER_TARGET_KEY,
MAVEN_COMPILER_ENCODING_KEY);
return properties.keySet().containsAll(keys);
}