Example usage for java.util Collections max

Introduction

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

Prototype

@SuppressWarnings({ "unchecked", "rawtypes" })
public static <T> T max(Collection<? extends T> coll, Comparator<? super T> comp)

Source Link

Document

Returns the maximum element of the given collection, according to the order induced by the specified comparator.

Usage

From source file:net.sourceforge.fenixedu.domain.student.Registration.java

public RegistrationState getLastActiveState() {
    List<RegistrationState> activeStateList = new ArrayList<RegistrationState>();

    CollectionUtils.select(getRegistrationStatesSet(), new Predicate() {

        @Override//from  w ww  .j  a v a 2s  .  com
        public boolean evaluate(Object arg0) {
            return ((RegistrationState) arg0).getStateType().isActive();
        }

    }, activeStateList);

    return !activeStateList.isEmpty() ? Collections.max(activeStateList, RegistrationState.DATE_COMPARATOR)
            : null;
}

From source file:org.opencms.db.CmsDriverManager.java

/**
 * Selects the best url name for a given resource and locale.<p>
 * /* w  w w .  ja  va2s .co m*/
 * @param dbc the database context 
 * @param id the resource's structure id 
 * @param locale the requested locale 
 * @param defaultLocales the default locales to use if the locale isn't available 
 * 
 * @return the URL name which was found 
 * 
 * @throws CmsDataAccessException if the database operation failed 
 */
public String readBestUrlName(CmsDbContext dbc, CmsUUID id, Locale locale, List<Locale> defaultLocales)
        throws CmsDataAccessException {

    List<CmsUrlNameMappingEntry> entries = getVfsDriver(dbc).readUrlNameMappingEntries(dbc,
            dbc.currentProject().isOnlineProject(), CmsUrlNameMappingFilter.ALL.filterStructureId(id));
    if (entries.isEmpty()) {
        return null;
    }

    ArrayListMultimap<String, CmsUrlNameMappingEntry> entriesByLocale = ArrayListMultimap.create();
    for (CmsUrlNameMappingEntry entry : entries) {
        entriesByLocale.put(entry.getLocale(), entry);
    }
    List<CmsUrlNameMappingEntry> lastEntries = new ArrayList<CmsUrlNameMappingEntry>();
    Comparator<CmsUrlNameMappingEntry> dateChangedComparator = new UrlNameMappingComparator();
    for (String localeKey : entriesByLocale.keySet()) {
        // for each locale select the latest mapping entry 
        CmsUrlNameMappingEntry latestEntryForLocale = Collections.max(entriesByLocale.get(localeKey),
                dateChangedComparator);
        lastEntries.add(latestEntryForLocale);
    }
    CmsLocaleManager localeManager = OpenCms.getLocaleManager();
    List<Locale> availableLocales = new ArrayList<Locale>();
    for (CmsUrlNameMappingEntry entry : lastEntries) {
        availableLocales.add(CmsLocaleManager.getLocale(entry.getLocale()));
    }
    Locale bestLocale = localeManager.getBestMatchingLocale(locale, defaultLocales, availableLocales);
    String bestLocaleStr = bestLocale.getLanguage();
    for (CmsUrlNameMappingEntry entry : lastEntries) {
        if (entry.getLocale().equals(bestLocaleStr)) {
            return entry.getName();
        }
    }
    return null;
}

From source file:org.opencms.db.CmsDriverManager.java

/**
 * Reads the newest URL names of a resource for all locales.<p>
 *  //  ww w .ja  v  a2  s .c o m
 * @param dbc the database context 
 * @param id the resource's structure id
 *  
 * @return the url names for the locales 
 * 
 * @throws CmsDataAccessException if the database operation failed 
 */
public List<String> readUrlNamesForAllLocales(CmsDbContext dbc, CmsUUID id) throws CmsDataAccessException {

    List<String> result = new ArrayList<String>();
    List<CmsUrlNameMappingEntry> entries = getVfsDriver(dbc).readUrlNameMappingEntries(dbc,
            dbc.currentProject().isOnlineProject(), CmsUrlNameMappingFilter.ALL.filterStructureId(id));
    ArrayListMultimap<String, CmsUrlNameMappingEntry> entriesByLocale = ArrayListMultimap.create();
    for (CmsUrlNameMappingEntry entry : entries) {
        String localeKey = entry.getLocale();
        entriesByLocale.put(localeKey, entry);
    }

    for (String localeKey : entriesByLocale.keySet()) {
        List<CmsUrlNameMappingEntry> entrs = entriesByLocale.get(localeKey);
        CmsUrlNameMappingEntry maxEntryForLocale = Collections.max(entrs, new UrlNameMappingComparator());
        result.add(maxEntryForLocale.getName());
    }
    return result;
}