asdrubale.java

	/**
	 * returns a list of strings with format
	 * {@code "### - XXXXXX"}, where 
	 * {@code ###} represents the number of schools (not branches)
	 * and {@code XXXXXX} represents the name of the municipality.
	 * If a school has more than one branch in a municipality
	 * it must be counted only once.
	 * 
	 * @return a collection of strings with the counts
	 */
	public Collection<String> countSchoolsPerMunicipality(){
		return listOfBranch.values()
						   .stream()
						   .collect(groupingBy(Branch::getMunicipality, counting()))
						   .entrySet()
						   .stream()
						   .map(e -> e.getValue() + " - " + e.getKey().getName())
						   .collect(toList());
	}
	
	/**
	 * returns a list of strings with format
	 * {@code "### - XXXXXX"}, where 
	 * {@code ###} represents the number of schools (not branches)
	 * and {@code XXXXXX} represents the name of the community.
	 * They are sorted by descending number of schools.s
	 * The list must contain only schools having at least
	 * a branch in a municipality part of a community.
	 * 
	 * @return a collection of strings with the counts
	 */
	public List<String> countSchoolsPerCommunity(){
		return listOfBranch.values()
				   	       .stream()
						   .filter(b -> ((Branch)b).getMunicipality().getCommunity().isPresent())
					       .collect(groupingBy(b -> ((Branch)b).getMunicipality().getCommunity(), counting()))
						   .entrySet()
						   .stream()
						   .sorted(Comparator.comparing(Map.Entry::getValue, Comparator.reverseOrder()))
						   .map(e -> e.getValue() + " - " + e.getKey().get().getName())
						   .collect(toList());
	}
	
}