isOutputEntry(previousIndex.keySet(), beforeExecutionIndex, afterExecutionSnapshot, isRoot)
        );
    }

    private static boolean isOutputEntry(Set<String> previousLocations, Map<String, FileSystemLocationSnapshot> beforeExecutionSnapshots, FileSystemLocationSnapshot afterExecutionSnapshot, Boolean isRoot) {

        file projectDir, "pom.xml", fileContentGenerator.generatePomXML(subProjectNumber, dependencyTree)
        file projectDir, "BUILD.bazel", bazelContentGenerator.generateBuildFile(subProjectNumber, dependencyTree)
        if (isRoot) {
            file projectDir, "WORKSPACE", bazelContentGenerator.generateWorkspace()
            file projectDir, "junit.bzl", bazelContentGenerator.generateJunitHelper()
        }

     */
    public void enterDirectory(DirectorySnapshot directorySnapshot, boolean isRoot) {}

    /**
     * Called for each regular file/directory/missing/unavailable file.
     *
     * @return how to continue visiting the rest of the snapshot hierarchy.
     */
    public abstract SnapshotVisitResult visitEntry(FileSystemLocationSnapshot snapshot, boolean isRoot);

    /**
     * Called after all entries in the directory has been visited.

            .join("\n        ")}
        """
    }

    String generateBuildGradle(Language language, Integer subProjectNumber, DependencyTree dependencyTree) {
        def isRoot = subProjectNumber == null
        if (isRoot && config.subProjects > 0) {
            if (config.compositeBuild) {
                return """
                ${createTaskThatDependsOnAllIncludedBuildsTaskWithSameName('clean')}

            @Override
            public void enterDirectory(DirectorySnapshot directorySnapshot, boolean isRoot) {
                try {
                    writeEntryType(encoder, EntryType.DIR_OPEN);
                    writePath(encoder, isRoot, directorySnapshot);
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            }

        }
    }

    def generateProject(File projectDir, Integer subProjectNumber) {
        def isRoot = subProjectNumber == null

        file projectDir, KOTLIN.fileNameFor('settings'), generateSettingsGradle(isRoot)
        file projectDir, "gradle.properties", generateGradleProperties(isRoot)

        file projectDir, config.dsl.fileNameFor('build'), generateBuildGradle(subProjectNumber)
    }

    @Override
    public final SnapshotVisitResult visitEntry(FileSystemLocationSnapshot snapshot, boolean isRoot) {
        if (!(snapshot.getType() == FileType.Missing && isRoot) && processedEntries.add(snapshot.getAbsolutePath())) {
            visitAcceptedEntry(snapshot, isRoot);
        }
        return SnapshotVisitResult.CONTINUE;
    }

    /**

        }

        public void preRoot(STATE state) {

        }

        public void preDirectory(STATE state) {
            boolean isRoot = dirStack.isEmpty();
            DirEntry dir = new DirEntry(isRoot ? state.getPath() : state.getName());
            if (isRoot) {
                property.roots.add(dir);
            } else {
                //noinspection ConstantConditions

        snapshot.accept(new RootTrackingFileSystemSnapshotHierarchyVisitor() {
            @Override
            SnapshotVisitResult visitEntry(FileSystemLocationSnapshot entrySnapshot, boolean isRoot) {
                if (includeRoots || !isRoot) {
                    absolutePaths << entrySnapshot.absolutePath
                }
                CONTINUE
            }
        })
        return absolutePaths
    }

            boolean isRoot = relativePath.isRoot();
            String targetPath = getTargetPath(relativePath);
            snapshot.accept(new FileSystemLocationSnapshotVisitor() {
                @Override
                public void visitDirectory(DirectorySnapshot directorySnapshot) {
                    assertCorrectType(isRoot, snapshot);