MetadataGraphEdge[] sortedExits = exits.toArray(new MetadataGraphEdge[0]);
                Arrays.sort(sortedExits, (e1, e2) -> {
                    if (e1.getDepth() == e2.getDepth()) {
                        if (e2.getPomOrder() == e1.getPomOrder()) {
                            return e1.getTarget()
                                    .toString()

     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    @Override
    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        return node1.getDepth() <= node2.getDepth() ? node1 : node2;
    }

                if (logger.isDebugEnabled()) {
                    logger.debug("Storing child urls: {}", resultData.getChildUrlSet());
                }
                final int depth = urlQueue.getDepth() == null ? 1 : urlQueue.getDepth() + 1;
                if (crawlerContext.getMaxDepth() < 0 || depth <= crawlerContext.getMaxDepth()) {
                    // add and filter urls

        UrlQueueImpl<Long> queue = new UrlQueueImpl<>();

        queue.setDepth(0);
        assertEquals(Integer.valueOf(0), queue.getDepth());

        queue.setDepth(5);
        assertEquals(Integer.valueOf(5), queue.getDepth());

        queue.setDepth(null);
        assertNull(queue.getDepth());
    }

    public void test_lastModifiedGetterSetter() {

                                // redirect
                                storeChildUrl(responseData.getRedirectLocation(), urlQueue.getUrl(), urlQueue.getWeight(),
                                        urlQueue.getDepth() == null ? 1 : urlQueue.getDepth() + 1);
                            }
                        }

                        log(logHelper, LogType.FINISHED_CRAWLING, crawlerContext, urlQueue);

     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    @Override
    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        return node1.getDepth() >= node2.getDepth() ? node1 : node2;
    }

     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#getDepth()
     */
    @Override
    public Integer getDepth() {
        return depth;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#setDepth(java.lang.Integer)
     */
    @Override
    public void setDepth(final Integer depth) {
        this.depth = depth;
    }

    /*

    private boolean newerFirst = true;

    @Override
    public MetadataGraphEdge apply(MetadataGraphEdge e1, MetadataGraphEdge e2) {
        int depth1 = e1.getDepth();
        int depth2 = e2.getDepth();

        if (depth1 == depth2) {
            ArtifactVersion v1 = new DefaultArtifactVersion(e1.getVersion());
            ArtifactVersion v2 = new DefaultArtifactVersion(e2.getVersion());

                if ((maxDepth != -1 && crawlRequest.getDepth() > maxDepth) || processedUrls.contains(crawlRequest.getUrl())) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Skipping crawl request for url='{}' at depth={} (maxDepth={}, alreadyProcessed={})",
                                crawlRequest.getUrl(), crawlRequest.getDepth(), maxDepth, processedUrls.contains(crawlRequest.getUrl()));

        return scope;
    }

    public void setScope(ArtifactScopeEnum scope) {
        this.scope = scope;
    }

    public int getDepth() {
        return depth;
    }

    public void setDepth(int depth) {
        this.depth = depth;
    }

    public boolean isResolved() {
        return resolved;
    }

    public void setResolved(boolean resolved) {