Example usage for java.util Set isEmpty

Introduction

In this page you can find the example usage for java.util Set isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this set contains no elements.

Usage

From source file:I18NUtil.java

/**
 * Searches for the nearest locale from the available options.  To match any locale, pass in
 * <tt>null</tt>.//w w w .ja  v  a  2 s . c o m
 * 
 * @param templateLocale the template to search for or <tt>null</tt> to match any locale
 * @param options the available locales to search from
 * @return Returns the best match from the available options, or the <tt>null</tt> if
 *      all matches fail
 */
public static Locale getNearestLocale(Locale templateLocale, Set<Locale> options) {
    if (options.isEmpty()) // No point if there are no options
    {
        return null;
    } else if (templateLocale == null) {
        for (Locale locale : options) {
            return locale;
        }
    } else if (options.contains(templateLocale)) // First see if there is an exact match
    {
        return templateLocale;
    }
    // make a copy of the set
    Set<Locale> remaining = new HashSet<Locale>(options);

    // eliminate those without matching languages
    Locale lastMatchingOption = null;
    String templateLanguage = templateLocale.getLanguage();
    if (templateLanguage != null && !templateLanguage.equals("")) {
        Iterator<Locale> iterator = remaining.iterator();
        while (iterator.hasNext()) {
            Locale option = iterator.next();
            if (option != null && !templateLanguage.equals(option.getLanguage())) {
                iterator.remove(); // It doesn't match, so remove
            } else {
                lastMatchingOption = option; // Keep a record of the last match
            }
        }
    }
    if (remaining.isEmpty()) {
        return null;
    } else if (remaining.size() == 1 && lastMatchingOption != null) {
        return lastMatchingOption;
    }

    // eliminate those without matching country codes
    lastMatchingOption = null;
    String templateCountry = templateLocale.getCountry();
    if (templateCountry != null && !templateCountry.equals("")) {
        Iterator<Locale> iterator = remaining.iterator();
        while (iterator.hasNext()) {
            Locale option = iterator.next();
            if (option != null && !templateCountry.equals(option.getCountry())) {
                // It doesn't match language - remove
                // Don't remove the iterator. If it matchs a langage but not the country, returns any matched language                     
                // iterator.remove();
            } else {
                lastMatchingOption = option; // Keep a record of the last match
            }
        }
    }
    /*if (remaining.isEmpty())
    {
    return null;
    }
    else */
    if (remaining.size() == 1 && lastMatchingOption != null) {
        return lastMatchingOption;
    } else {
        // We have done an earlier equality check, so there isn't a matching variant
        // Also, we know that there are multiple options at this point, either of which will do.

        // This gets any country match (there will be worse matches so we take the last the country match)
        if (lastMatchingOption != null) {
            return lastMatchingOption;
        } else {
            for (Locale locale : remaining) {
                return locale;
            }
        }
    }
    // The logic guarantees that this code can't be called
    throw new RuntimeException("Logic should not allow code to get here.");
}

---

From source file:com.espertech.esper.epl.lookup.EventTableIndexUtil.java

public static Pair<IndexMultiKey, EventTableIndexEntryBase> findIndexBestAvailable(
        Map<IndexMultiKey, ? extends EventTableIndexEntryBase> tablesAvailable, Set<String> keyPropertyNames,
        Set<String> rangePropertyNames, List<IndexHintInstruction> optionalIndexHintInstructions) {
    if (keyPropertyNames.isEmpty() && rangePropertyNames.isEmpty()) {
        return null;
    }//from  ww w.  ja  v a 2 s.  c  om

    // determine candidates
    List<IndexedPropDesc> hashProps = new ArrayList<IndexedPropDesc>();
    for (String keyPropertyName : keyPropertyNames) {
        hashProps.add(new IndexedPropDesc(keyPropertyName, null));
    }
    List<IndexedPropDesc> rangeProps = new ArrayList<IndexedPropDesc>();
    for (String rangePropertyName : rangePropertyNames) {
        rangeProps.add(new IndexedPropDesc(rangePropertyName, null));
    }
    Map<IndexMultiKey, EventTableIndexEntryBase> indexCandidates = (Map<IndexMultiKey, EventTableIndexEntryBase>) EventTableIndexUtil
            .findCandidates(tablesAvailable, hashProps, rangeProps);

    // handle hint
    if (optionalIndexHintInstructions != null) {
        IndexMultiKey found = EventTableIndexUtil.findByIndexHint(indexCandidates,
                optionalIndexHintInstructions);
        if (found != null) {
            return getPair(tablesAvailable, found);
        }
    }

    // no candidates
    if (indexCandidates == null || indexCandidates.isEmpty()) {
        if (log.isDebugEnabled()) {
            log.debug("No index found.");
        }
        return null;
    }

    return getBestCandidate(indexCandidates);
}

---

From source file:com.symbian.driver.core.controller.utils.ModelUtils.java

/**
 * Checks if the file is eclipsing a file in one of the parent nodes.
 * /*www  .jav a 2s . co m*/
 * @param aFile
 * @param aTaskNode
 * @return The Task node where the file is eclipsing with.
 */
public static Task isFileEclipsing(String aFile, Task aTaskNode) {
    if (aFile == null || aFile.length() < 1 || aTaskNode == null) {
        LOGGER.warning("File eclipsing check received invalid file/task name.");
        return null;
    }

    String lFile = aFile.toLowerCase();

    if (sEclipsingStack.containsKey(lFile.toLowerCase())) {
        Set<Task> lNode = sEclipsingStack.get(lFile);
        if (lNode != null && !lNode.isEmpty()) {

            for (Task lNextObject : lNode) {
                if (EcoreUtil.isAncestor(lNextObject, aTaskNode)) {
                    return lNextObject;
                }
            }

            addNode(lFile.toLowerCase(), aTaskNode, lNode);
            return null;
        }
    }

    addNode(lFile.toLowerCase(), aTaskNode, new HashSet<Task>());
    return null;
}

---

From source file:org.opendatakit.briefcase.util.WebUtils.java

public static final String createLinkWithProperties(String url, Map<String, String> properties) {
    StringBuilder urlBuilder = new StringBuilder();
    urlBuilder.append(url);//from w w w . j av a 2s  . c o  m
    if (properties != null) {
        Set<Map.Entry<String, String>> propSet = properties.entrySet();
        if (!propSet.isEmpty()) {
            urlBuilder.append("?");
            boolean firstParam = true;
            for (Map.Entry<String, String> property : propSet) {
                if (firstParam) {
                    firstParam = false;
                } else {
                    urlBuilder.append("&");
                }

                String value = property.getValue();
                if (value == null) {
                    value = "NULL";
                }

                String valueEncoded;
                try {
                    valueEncoded = URLEncoder.encode(value, "UTF-8");
                } catch (UnsupportedEncodingException e) {
                    throw new IllegalStateException("unrecognized UTF-8 encoding");
                }
                urlBuilder.append(property.getKey() + "=" + valueEncoded);
            }
        }
    }
    return urlBuilder.toString();
}

---

From source file:com.javaid.bolaky.carpool.service.acl.pools.impl.PoolsAclTranslator.java

private static Integer getNumberOfNewRequest(Set<Passenger> passengers) {

    Integer numberOfNewRequest = null;

    if (passengers != null && !passengers.isEmpty()) {

        for (Passenger passenger : passengers) {

            if (StateStatus.PENDING.equals(passenger.getStateStatus())) {

                if (numberOfNewRequest == null) {
                    numberOfNewRequest = 0;
                }//from ww w .ja  v a2s  .  co m

                numberOfNewRequest++;
            }
        }
    }

    return numberOfNewRequest;
}

---

From source file:ddf.security.common.audit.SecurityLogger.java

private static String getUser(Subject subject) {
    try {//ww w.  j a  v a  2  s .  c o m
        if (subject == null) {
            subject = ThreadContext.getSubject();
        }
        if (subject == null) {
            javax.security.auth.Subject javaSubject = javax.security.auth.Subject
                    .getSubject(AccessController.getContext());
            if (javaSubject != null) {
                Set<UserPrincipal> userPrincipal = javaSubject.getPrincipals(UserPrincipal.class);
                if (userPrincipal != null && !userPrincipal.isEmpty()) {
                    return userPrincipal.toArray(new UserPrincipal[1])[0].getName();
                }
            }
        } else {
            return SubjectUtils.getName(subject, NO_USER);
        }
    } catch (Exception e) {
        // ignore and return NO_USER
    }
    return NO_USER;
}

---

From source file:org.zkoss.spring.security.SecurityUtil.java

/**
 * Return true if the authenticated principal is granted NONE of the roles 
 * specified in authorities.//from  w  w w. j  a  v  a2s.co  m
 * 
 * @param authorities A comma separated list of roles which the user must 
 * have been granted NONE.
 * @return true if the authenticated principal is granted authorities 
 * of NONE the specified roles.
 */
public static boolean isNoneGranted(String authorities) {
    if (null == authorities || "".equals(authorities)) {
        return false;
    }
    final Collection<? extends GrantedAuthority> granted = getPrincipalAuthorities();
    final Set grantedCopy = retainAll(granted, parseAuthoritiesString(authorities));
    return grantedCopy.isEmpty();
}

---

From source file:org.zkoss.spring.security.SecurityUtil.java

/**
 * Return true if the authenticated principal is granted ANY of the roles 
 * specified in authorities./*  w ww  . j a  v a2 s  . com*/
 * 
 * @param authorities A comma separated list of roles which the user must have  
 * been granted ANY.
 * @return true true if the authenticated principal is granted authorities 
 * of ALL the specified roles.
 */
public static boolean isAnyGranted(String authorities) {
    if (null == authorities || "".equals(authorities)) {
        return false;
    }
    final Collection<? extends GrantedAuthority> granted = getPrincipalAuthorities();
    final Set grantedCopy = retainAll(granted, parseAuthoritiesString(authorities));
    return !grantedCopy.isEmpty();
}

---

From source file:com.javaid.bolaky.carpool.service.acl.pools.impl.PoolsAclTranslator.java

public static Set<CarPoolError> convertToCarPoolErrors(Set<PoolsError> poolsErrors) {

    Set<CarPoolError> carPoolErrors = null;

    if (poolsErrors != null && !poolsErrors.isEmpty()) {

        carPoolErrors = new ListOrderedSet<CarPoolError>();

        for (PoolsError poolsError : poolsErrors) {

            CarPoolError carPoolError = CarPoolError.convertFrom(poolsError);

            if (carPoolError != null) {
                carPoolErrors.add(carPoolError);
            }/*from w w w. j  a v a  2 s  .  co m*/
        }
    }

    return carPoolErrors;
}

---

From source file:net.sourceforge.fenixedu.domain.Guide.java

static public Guide readLastVersionByNumberAndYear(Integer number, Integer year) {
    Set<Guide> result = new HashSet<Guide>();
    for (Guide guide : Bennu.getInstance().getGuidesSet()) {
        if (guide.getYear().equals(year) && guide.getNumber().equals(number)) {
            result.add(guide);//from w  w  w.  ja v  a  2 s.  c  om
        }
    }

    if (result.isEmpty()) {
        return null;
    }

    return Collections.max(result, Guide.COMPARATOR_BY_VERSION);
}

---

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