Example usage for java.util Collections emptyList

Introduction

In this page you can find the example usage for java.util Collections emptyList.

Prototype

@SuppressWarnings("unchecked")
public static final <T> List<T> emptyList()

Source Link

Document

Returns an empty list (immutable).

Usage

From source file:no.dusken.aranea.service.PersonServiceImpl.java

public List<Person> getPersons() {
    List<Person> list = Collections.emptyList();
    try {/*from  www  .j a  va  2 s .c  o  m*/
        list = genericDao.getByNamedQuery("person_persons", null);
    } catch (DataAccessException dae) {
        log.warn("Unable to get Person", dae);
    }
    return list;
}

From source file:net.sf.jabref.logic.search.DatabaseSearcher.java

public List<BibEntry> getMatches() {
    LOGGER.debug("Search term: " + query);

    if (!query.isValid()) {
        LOGGER.warn("Search failed: illegal search expression");
        return Collections.emptyList();
    }//from  w w  w.j  av  a 2s.  c  o m

    List<BibEntry> matchEntries = database.getEntries().stream().filter(query::isMatch)
            .collect(Collectors.toList());
    return BibDatabases.purgeEmptyEntries(matchEntries);
}

From source file:org.terasoluna.tourreservation.domain.service.tourinfo.TourInfoServiceImpl.java

@Override
public Page<TourInfo> searchTour(TourInfoSearchCriteria criteria, Pageable pageable) {

    long total = tourInfoRepository.countBySearchCriteria(criteria);
    List<TourInfo> content;
    if (0 < total) {
        content = tourInfoRepository.findPageBySearchCriteria(criteria, pageable);
    } else {/*  w  w w.  ja  va  2s .  c om*/
        content = Collections.emptyList();
    }

    Page<TourInfo> page = new PageImpl<TourInfo>(content, pageable, total);
    return page;
}

From source file:ch.ivyteam.ivy.maven.BaseEngineProjectMojoTest.java

protected final static Collection<File> findFiles(File dir, String fileExtension) {
    if (!dir.exists()) {
        return Collections.emptyList();
    }//from  ww w . j  a va  2 s. c  o  m
    return FileUtils.listFiles(dir, new String[] { fileExtension }, true);
}

From source file:gumga.framework.application.service.JasperReportService.java

/**
 * Gera o relatorio com os dados e parametros informados. Chamando este
 * metodo o programador pode exportar da forma como quiser a partir do
 * objeto <code>JasperPrint</code>. 
 * // ww  w  .ja  v a2 s. c  o  m
 * @param reportStream A input stream contendo o arquivo .jasper
 * @param data Os dados a serem populados no relatorio
 * @param params Os parametros do relatorio. Opcional
 * @return O relatorio populado mas nao renderizado
 * @throws JRException Quando houver erro no jasper
 * @throws IOException Quando houver erro no arquivo informado
 */
public JasperPrint generateReport(InputStream reportStream, List data, Map<String, Object> params)
        throws JRException, IOException {
    if (data == null) {
        data = Collections.emptyList();
    }
    if (params == null) {
        params = new HashMap<>();
    }
    JasperReport jasperReport = (JasperReport) JRLoader.loadObject(reportStream);
    JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params,
            new JRBeanCollectionDataSource(data));
    return jasperPrint;
}

From source file:org.jboss.seam.forge.shell.util.PluginUtil.java

public static List<PluginRef> findPlugin(String repoUrl, String searchString, PipeOut out) throws Exception {
    DefaultHttpClient client = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(repoUrl);

    out.print("Connecting to remote repository ... ");
    HttpResponse httpResponse = client.execute(httpGet);

    switch (httpResponse.getStatusLine().getStatusCode()) {
    case 200://w ww .  jav a 2  s  .c o m
        out.println("found!");
        break;

    case 404:
        out.println("failed! (plugin index not found: " + repoUrl + ")");
        return Collections.emptyList();

    default:
        out.println("failed! (server returned status code: " + httpResponse.getStatusLine().getStatusCode());
        return Collections.emptyList();
    }

    Pattern pattern = Pattern.compile(GeneralUtils.pathspecToRegEx("*" + searchString + "*"));

    List<PluginRef> pluginList = new ArrayList<PluginRef>();

    Yaml yaml = new Yaml();
    for (Object o : yaml.loadAll(httpResponse.getEntity().getContent())) {
        if (o == null) {
            continue;
        }

        Map map = (Map) o;
        String name = (String) map.get("name");

        if (pattern.matcher(name).matches()) {
            pluginList.add(bindToPuginRef(map));
        }
    }

    return pluginList;
}

From source file:cz.muni.fi.mir.db.dao.impl.ElementDAOImpl.java

@Override
public List<Element> getAllElements() {
    List<Element> resultList = Collections.emptyList();

    try {/*from  w w  w  .j  a v a 2  s.c o m*/
        resultList = entityManager.createQuery("SELECT e FROM element e", Element.class).getResultList();
    } catch (NoResultException nre) {
        logger.debug(nre);
    }

    return resultList;
}

From source file:com.yoavst.quickapps.URLEncodedUtils.java

/**
 * Returns a list of {@link NameValuePair NameValuePairs} as built from the
 * URI's query portion. For example, a URI of
 * http://example.org/path/to/file?a=1&b=2&c=3 would return a list of three
 * NameValuePairs, one for a=1, one for b=2, and one for c=3.
 * <p/>//from  w  w  w.j a  v  a2s  . com
 * This is typically useful while parsing an HTTP PUT.
 *
 * @param uri      uri to parse
 * @param encoding encoding to use while parsing the query
 */
public static List<NameValuePair> parse(final URI uri, final String encoding) {
    List<NameValuePair> result = Collections.emptyList();
    final String query = uri.getRawQuery();
    if (query != null && query.length() > 0) {
        result = new ArrayList<>();
        parse(result, new Scanner(query), encoding);
    }
    return result;
}

From source file:Main.java

public static List<Element> elements(Element element) {
    if (element == null || !element.hasChildNodes()) {
        return Collections.emptyList();
    }//from   ww  w .j av a 2s. c om

    List<Element> elements = new ArrayList<Element>();
    for (Node child = element.getFirstChild(); child != null; child = child.getNextSibling()) {
        if (child.getNodeType() == Node.ELEMENT_NODE) {
            elements.add((Element) child);
        }
    }
    return elements;
}

From source file:com.weibo.datasys.crawler.impl.strategy.rule.seed.UpdateLinkDBRule.java

@Override
public List<SeedData> apply(Null in) {
    long s = System.currentTimeMillis();
    logger.info("[UpdateLinkDBRule] - set state to 1. start.");
    SaveStrategy saveStrategy = task.getSaveStrategy();
    String sql = "update " + saveStrategy.getLinkDB() + "." + saveStrategy.getLinkTable()
            + " set state=1 where state=0";
    int updateCount = LinkDataDAO.getInstance().modifyBySQL(sql, saveStrategy.getLinkDS());
    long e = System.currentTimeMillis();
    logger.info("[UpdateLinkDBRule] - set state to 1. done. cost={} ms. count={}", (e - s), updateCount);
    return Collections.emptyList();
}