Example usage for java.util Collections EMPTY_LIST

Introduction

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

Prototype

List EMPTY_LIST

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Document

The empty list (immutable).

Usage

From source file:it.unibo.alchemist.test.TestLanguage.java

@Test
public void testMethod02() {
    testFileWithExplicitResult("/method02.pt", Collections.EMPTY_LIST);
}

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From source file:com.nextep.designer.dbgm.mergers.TableMerger.java

/**
 * @see com.nextep.designer.vcs.model.IMerger#doCompare(java.lang.Object,
 *      java.lang.Object)//from   ww  w .j  a  v a2  s . com
 */
@SuppressWarnings("unchecked")
@Override
public IComparisonItem doCompare(IReferenceable source, IReferenceable target) {
    IComparisonItem result = new ComparisonResult(source, target, getMergeStrategy().getComparisonScope());
    IBasicTable sourceTable = (IBasicTable) source;
    IBasicTable targetTable = (IBasicTable) target;
    // Map<VersionReference,IBasicColumn> srcColRefs =
    // hashByRef(source.getColumns());
    compareName(result, sourceTable, targetTable);
    result.addSubItem(new ComparisonAttribute(ATTR_TEMPORARY,
            sourceTable == null ? null : String.valueOf(sourceTable.isTemporary()),
            targetTable == null ? null : String.valueOf(targetTable.isTemporary())));

    result.addSubItem(new ComparisonAttribute(ATTR_SHORTNAME,
            sourceTable == null ? null : notNull(sourceTable.getShortName()),
            targetTable == null ? null : notNull(targetTable.getShortName()), ComparisonScope.REPOSITORY));
    // Comparing contents
    listCompare(CATEGORY_COLUMNS, result,
            sourceTable == null ? Collections.EMPTY_LIST : sourceTable.getColumns(),
            targetTable == null ? Collections.EMPTY_LIST : targetTable.getColumns());
    // Ordering keys
    List<IKeyConstraint> srcKeyList = new ArrayList<IKeyConstraint>(
            sourceTable == null ? Collections.EMPTY_LIST : sourceTable.getConstraints());
    List<IKeyConstraint> tgtKeyList = new ArrayList<IKeyConstraint>(
            targetTable == null ? Collections.EMPTY_LIST : targetTable.getConstraints());
    Comparator<IKeyConstraint> c = new KeyComparator();
    Collections.sort(srcKeyList, c);
    Collections.sort(tgtKeyList, c);
    listCompare(CATEGORY_KEYS, result, srcKeyList, tgtKeyList);

    // Handling physical tables
    // We STOP HERE on non-repository comparison depending on the physicals
    // synchronization flag
    // if(getMergeStrategy().getComparisonScope()!=ComparisonScope.REPOSITORY
    // &&
    // !SQLGenUtil.getPreferenceBool(PreferenceConstants.SYNCHRONIZE_PHYSICALS))
    // {
    // return result;
    // }
    if (sourceTable instanceof IPhysicalObject && targetTable instanceof IPhysicalObject) {
        final IPhysicalObject src = (IPhysicalObject) sourceTable;
        final IPhysicalObject tgt = (IPhysicalObject) targetTable;
        final ITablePhysicalProperties srcPty = (ITablePhysicalProperties) (src == null ? null
                : src.getPhysicalProperties());
        final ITablePhysicalProperties tgtPty = (ITablePhysicalProperties) (tgt == null ? null
                : tgt.getPhysicalProperties());
        if (srcPty != null || tgtPty != null) {
            IMerger m = MergerFactory.getMerger(IElementType.getInstance(ITablePhysicalProperties.TYPE_ID),
                    getMergeStrategy().getComparisonScope());
            if (m != null) {
                result.addSubItem(ATTR_PHYSICAL, m.compare(srcPty, tgtPty));
            }
        }
    }
    // returning our comparison result
    return result;
}

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From source file:io.seldon.recommendation.RecentItemsRecommender.java

@Override
public ItemRecommendationResultSet recommend(String client, Long user, Set<Integer> dimensions,
        int maxRecsCount, RecommendationContext ctxt, List<Long> recentItemInteractions) {
    HashMap<Long, Double> recommendations = new HashMap<>();
    Set<Long> exclusions;

    if (ctxt.getMode() == RecommendationContext.MODE.INCLUSION) {
        logger.warn("Can't run RecentItemsRecommender in inclusion context mode");
        return new ItemRecommendationResultSet(name);
    } else {/*from w ww .j  a  va 2 s.c  o m*/
        exclusions = ctxt.getContextItems();
    }
    if (logger.isDebugEnabled())
        logger.debug("Running with dimension " + dimensions.toString());
    Collection<Long> recList = itemStorage
            .retrieveRecentlyAddedItems(client, maxRecsCount + exclusions.size(), dimensions).getItems();
    if (recList.size() > 0) {
        double scoreIncr = 1.0 / (double) recList.size();
        int count = 0;
        for (Long item : recList) {
            if (count >= maxRecsCount)
                break;
            else if (!exclusions.contains(item))
                recommendations.put(item, 1.0 - (count++ * scoreIncr));
        }
        List<ItemRecommendationResultSet.ItemRecommendationResult> results = new ArrayList<>();
        for (Map.Entry<Long, Double> entry : recommendations.entrySet()) {
            results.add(new ItemRecommendationResultSet.ItemRecommendationResult(entry.getKey(),
                    entry.getValue().floatValue()));
        }
        if (logger.isDebugEnabled())
            logger.debug("Recent items algorithm returned " + recommendations.size() + " items");
        return new ItemRecommendationResultSet(results, name);
    } else {
        logger.warn("No items returned for recent items of dimension " + StringUtils.join(dimensions, ",")
                + " for " + client);
    }
    return new ItemRecommendationResultSet(Collections.EMPTY_LIST, name);
}

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From source file:com.github.jknack.handlebars.internal.Variable.java

/**
 * Creates a new {@link Variable}./*w  ww.  j av  a 2 s .c  o  m*/
 *
 * @param handlebars The handlebars instance.
 * @param name The variable's name. Required.
 * @param type The variable's type. Required.
 */
@SuppressWarnings("unchecked")
public Variable(final Handlebars handlebars, final String name, final TagType type) {
    this(handlebars, name, type, Collections.EMPTY_LIST, Collections.EMPTY_MAP);
}

---

From source file:io.seldon.clustering.recommender.ItemCategoryClusterCountsRecommender.java

@Override
public ItemRecommendationResultSet recommend(String client, Long user, int dimensionId, int maxRecsCount,
        RecommendationContext ctxt, List<Long> recentItemInteractions) {
    if (ctxt.getCurrentItem() != null) {
        Set<Long> exclusions = Collections.emptySet();
        if (ctxt.getMode() == RecommendationContext.MODE.EXCLUSION) {
            exclusions = ctxt.getContextItems();
        }//from  w w  w  .j a  v a 2 s  . c o  m
        Integer dimId = getDimensionForAttrName(ctxt.getCurrentItem(), client, ctxt);
        if (dimId != null) {
            CountRecommender r = cUtils.getCountRecommender(client);
            if (r != null) {
                Double decayRate = ctxt.getOptsHolder().getDoubleOption(DECAY_RATE_OPTION_NAME);
                long t1 = System.currentTimeMillis();
                Map<Long, Double> recommendations = r.recommendGlobal(dimensionId, maxRecsCount, exclusions,
                        decayRate, dimId);
                long t2 = System.currentTimeMillis();
                logger.debug("Recommendation via cluster counts for dimension " + dimId + " for item  "
                        + ctxt.getCurrentItem() + " for user " + user + " took " + (t2 - t1));
                List<ItemRecommendationResultSet.ItemRecommendationResult> results = new ArrayList<>();
                for (Map.Entry<Long, Double> entry : recommendations.entrySet()) {
                    results.add(new ItemRecommendationResultSet.ItemRecommendationResult(entry.getKey(),
                            entry.getValue().floatValue()));
                }
                return new ItemRecommendationResultSet(results, name);

            } else
                logger.warn("Can't get count recommender for " + client);
        } else
            logger.info("Can't get dim for item " + ctxt.getCurrentItem()
                    + " so can't run cluster counts for dimension algorithm ");
    } else
        logger.info("Can't cluster count for category for user " + user + " client user id "
                + ctxt.getCurrentItem() + " as no current item passed in");

    return new ItemRecommendationResultSet(Collections.EMPTY_LIST, name);
}

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From source file:net.sourceforge.fenixedu.presentationTier.Action.publico.SearchInquiriesResultPageDA.java

public ActionForward selectExecutionSemester(ActionMapping actionMapping, ActionForm actionForm,
        HttpServletRequest request, HttpServletResponse response) {

    SearchInquiriesResultPageDTO searchPageDTO = (SearchInquiriesResultPageDTO) actionForm;

    ExecutionSemester executionSemester = searchPageDTO.getExecutionSemester();
    if (executionSemester == null) {
        return prepare(actionMapping, actionForm, request, response);
    }//from  w  w w .ja  va2s  . com

    request.setAttribute("executionCourses", Collections.EMPTY_LIST);
    request.setAttribute("executionDegrees", getExecutionDegrees(executionSemester));
    request.setAttribute("executionSemesters", getExecutionSemesters());

    return actionMapping.findForward("searchPage");
}

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From source file:de.betterform.xml.xforms.ui.Item.java

public List getNodeset() {
    if (this.itemset != null) {
        List repeatNodeset = itemset.getNodeset();
        int localPosition = getPosition();
        return repeatNodeset.size() >= localPosition
                ? Collections.singletonList(repeatNodeset.get(localPosition - 1))
                : Collections.EMPTY_LIST;
    }//from  w  w  w.  java2s. c o  m
    return null;
}

---

From source file:fi.vm.sade.organisaatio.business.impl.OrganisaatioTarjonta.java

private List<KoulutusHakutulosV1RDTO> getOrganisaatioKoulutukset(JsonElement organisaatioTulos) {
    List<KoulutusHakutulosV1RDTO> koulutukset = new ArrayList<>();

    JsonElement koulutusTulokset = organisaatioTulos.getAsJsonObject().get("tulokset");

    // Tarkistetaan, ett tuloksia lytyy!
    if (koulutusTulokset.isJsonNull()) {
        LOG.warn("Search failed for koulutus! --> koulutus tulokset == NULL");
        return Collections.EMPTY_LIST;
    }/*  w w w.  j  av  a2 s  .  com*/

    // Kydn lpi koulutukset ja deserialisoidaan
    JsonArray koulutusTuloksetArray = koulutusTulokset.getAsJsonArray();
    for (JsonElement koulutusTulos : koulutusTuloksetArray) {
        KoulutusHakutulosV1RDTO hakuTulos = gson.fromJson(koulutusTulos, KoulutusHakutulosV1RDTO.class);

        koulutukset.add(hakuTulos);
    }

    return koulutukset;
}

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From source file:com.seitenbau.jenkins.plugins.dynamicparameter.BaseParameterDefinition.java

/**
 * Get the script result as a list.//from  w w  w .j  a  v a2s.com
 * @return list of values if the script returns a non-null list;
 *         {@link Collections#EMPTY_LIST}, otherwise
 */
@SuppressWarnings("unchecked")
public final List<Object> getScriptResultAsList(Map<String, String> parameters) {
    Object value = executeScript(parameters);
    if (value instanceof List) {
        return (List<Object>) value;
    }
    String name = getName();
    String msg = String.format(
            "Script parameter with name '%s' the value is not a instance of java.util.List the parameter value is : %s",
            name, value);
    logger.info(msg);
    return Collections.EMPTY_LIST;
}

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From source file:info.magnolia.cms.util.QueryUtil.java

/**
 * Executes a query - if an exception is thrown, it is logged and an empty collection is
 * returned./*w ww  . ja v a 2  s .  c o  m*/
 * @deprecated Since 4.5.4 use search methods.
 */
@SuppressWarnings("unchecked")
//Collections.EMPTY_LIST;
public static Collection<Content> query(String repository, String statement, String language,
        String returnItemType, long maxResultSize) {
    try {
        return exceptionThrowingQuery(repository, statement, language, returnItemType, maxResultSize);
    } catch (Exception e) {
        log.error("can't execute query [" + statement + "], will return empty collection", e);
    }
    return Collections.EMPTY_LIST;
}

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