sourcePaths.add(sourcePath);
    }

    public void addSourcePaths(Set<String> sourcePath) {
        sourcePaths.addAll(sourcePath);
    }

    public Collection<String> getSourcePaths() {
        return Collections.unmodifiableCollection(sourcePaths);
    }

    public boolean isBuildNeeded() {
        return isFullRebuildNeeded() || !classesToCompile.isEmpty() || !classesToProcess.isEmpty();
    }