patterns.put("tab", "\t");
    }

    @InputFiles
    @PathSensitive(PathSensitivity.RELATIVE)
    @SkipWhenEmpty
    public FileCollection getFiles() {
        return getSourceFolders().get()
            .stream()
            .map(sourceFolder -> sourceFolder.matching(filesFilter))
            .reduce(FileTree::plus)
            .orElse(projectLayout.files().getAsFileTree());
    }

    public TaskProvider<? extends Task> createTask(Project project) {
        return project.getTasks().register(FORBIDDEN_PATTERNS_TASK_NAME, ForbiddenPatternsTask.class, forbiddenPatternsTask -> {
            forbiddenPatternsTask.getSourceFolders()
                .addAll(
                    providerFactory.provider(
                        () -> GradleUtils.getJavaSourceSets(project).stream().map(s -> s.getAllSource()).collect(Collectors.toList())

                final SourceSetContainer sourceSets = project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets();
                licenseHeadersTask.getSourceFolders()
                    .addAll(providerFactory.provider(() -> sourceSets.stream().map(s -> s.getAllJava()).collect(Collectors.toList())));
            });
        });
    }