Example usage for java.util Collections EMPTY

Introduction

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

Prototype

Set EMPTY_SET

To view the source code for java.util Collections EMPTY_SET.

Click Source Link

Document

The empty set (immutable).

Usage

From source file:com.agilejava.maven.docbkx.GeneratorMojo.java

/**
 * Returns a {@link Collection} of all parameter names defined in the
 * stylesheet or in one of the stylesheets imported or included in the
 * stylesheet.//from   ww w.j  a  v a 2 s . c  om
 *
 * @param url
 *            The location of the stylesheet to analyze.
 * @return A {@link Collection} of all parameter names found in the
 *         stylesheet pinpointed by the <code>url</code> argument.
 *
 * @throws MojoExecutionException
 *             If the operation fails to detect parameter names.
 */
private Collection getParameterNames(String url) throws MojoExecutionException {
    ByteArrayOutputStream out = null;

    try {
        Transformer transformer = createParamListTransformer();
        Source source = new StreamSource(url);
        out = new ByteArrayOutputStream();

        Result result = new StreamResult(out);
        transformer.transform(source, result);
        out.flush();
        if (out.size() != 0) {
            // at least one param has been found, because the split with return an empty string if there is no data
            String[] paramNames = new String(out.toByteArray()).split("\n");
            return new HashSet(Arrays.asList(paramNames));
        } else {
            // else no param found
            return new HashSet();
        }
    } catch (IOException ioe) {
        // Impossible, but let's satisfy PMD and FindBugs
        getLog().warn("Failed to flush ByteArrayOutputStream.");
    } catch (TransformerConfigurationException tce) {
        throw new MojoExecutionException("Failed to create Transformer for retrieving parameter names", tce);
    } catch (TransformerException te) {
        throw new MojoExecutionException("Failed to apply Transformer for retrieving parameter names.", te);
    } finally {
        IOUtils.closeQuietly(out);
    }

    return Collections.EMPTY_SET;
}

From source file:uk.ac.ebi.intact.editor.services.curate.EditorObjectService.java

@Transactional(value = "jamiTransactionManager", readOnly = true, propagation = Propagation.REQUIRED)
public void synchronizeExperimentShortLabel(IntactExperiment object) {
    IntactUtils.synchronizeExperimentShortLabel(object, getIntactDao().getEntityManager(),
            Collections.EMPTY_SET);
}

From source file:org.egov.services.budget.BudgetDetailService.java

public Set<Budget> findBudgetTree(final Budget budget, final BudgetDetail example) {
    if (budget == null)
        return Collections.EMPTY_SET;
    final Criteria budgetDetailCriteria = constructCriteria(example);
    budgetDetailCriteria.createCriteria(Constants.BUDGET);
    final List<Budget> leafBudgets = budgetDetailCriteria
            .setProjection(Projections.distinct(Projections.property(Constants.BUDGET))).list();
    final List<Budget> parents = new ArrayList<Budget>();
    final Set<Budget> budgetTree = new LinkedHashSet<Budget>();
    for (Budget leaf : leafBudgets) {
        parents.clear();//from  w w w . j a  v a2 s. com
        while (leaf != null && leaf.getId() != budget.getId()) {
            parents.add(leaf);
            leaf = leaf.getParent();
        }
        if (leaf != null) {
            parents.add(leaf);
            budgetTree.addAll(parents);
        }
    }
    return budgetTree;
}

From source file:uk.ac.ebi.intact.editor.services.curate.EditorObjectService.java

@Transactional(value = "jamiTransactionManager", readOnly = true, propagation = Propagation.REQUIRED)
public void synchronizeInteractionShortLabel(IntactInteractionEvidence object) {
    IntactUtils.synchronizeInteractionEvidenceShortName(object, getIntactDao().getEntityManager(),
            Collections.EMPTY_SET);
}

From source file:org.apache.myfaces.shared_impl.renderkit.RendererUtils.java

private static Set internalSubmittedOrSelectedValuesAsSet(FacesContext context, UIComponent component,
        Converter converter, UISelectMany uiSelectMany, Object values) {
    if (values == null || EMPTY_STRING.equals(values)) {
        return Collections.EMPTY_SET;
    } else if (values instanceof Object[]) {
        //Object array
        Object[] ar = (Object[]) values;
        if (ar.length == 0) {
            return Collections.EMPTY_SET;
        }//w  w  w .j  a  v a  2 s .  co m

        HashSet set = new HashSet(HashMapUtils.calcCapacity(ar.length));
        for (int i = 0; i < ar.length; i++) {
            set.add(getConvertedStringValue(context, component, converter, ar[i]));
        }
        return set;
    } else if (values.getClass().isArray()) {
        //primitive array
        int len = Array.getLength(values);
        HashSet set = new HashSet(org.apache.myfaces.shared_impl.util.HashMapUtils.calcCapacity(len));
        for (int i = 0; i < len; i++) {
            set.add(getConvertedStringValue(context, component, converter, Array.get(values, i)));
        }
        return set;
    } else if (values instanceof List) {
        List lst = (List) values;
        if (lst.size() == 0) {
            return Collections.EMPTY_SET;
        } else {
            HashSet set = new HashSet(HashMapUtils.calcCapacity(lst.size()));
            for (Iterator i = lst.iterator(); i.hasNext();)
                set.add(getConvertedStringValue(context, component, converter, i.next()));

            return set;
        }
    } else {
        throw new IllegalArgumentException("Value of UISelectMany component with path : "
                + getPathToComponent(uiSelectMany) + " is not of type Array or List");
    }
}

From source file:org.apache.jcs.auxiliary.remote.server.RemoteCacheServer.java

/**
 * Gets the set of keys of objects currently in the group.
 * <p>//from w  w  w .jav a  2  s.  c om
 * @param cacheName
 * @param group
 * @return A Set of group keys
 */
public Set getGroupKeys(String cacheName, String group) {
    CacheListeners cacheDesc = null;
    try {
        cacheDesc = getCacheListeners(cacheName);
    } catch (Exception e) {
        log.error("Problem getting listeners.", e);
    }

    if (cacheDesc == null) {
        return Collections.EMPTY_SET;
    }
    CompositeCache c = (CompositeCache) cacheDesc.cache;
    return c.getGroupKeys(group);
}

From source file:org.opendaylight.ovsdb.hwvtepsouthbound.transact.HwvtepOperationalState.java

public Set<InstanceIdentifier> getDeletedKeysInCurrentTx(Class<? extends Identifiable> cls) {
    if (currentTxDeletedKeys.containsKey(cls)) {
        return currentTxDeletedKeys.get(cls).keySet();
    }//w w  w  .ja  v a 2s .  co  m
    return Collections.EMPTY_SET;
}

From source file:org.eclipse.tracecompass.tmf.core.statesystem.TmfStateSystemAnalysisModule.java

@Override
public @NonNull Iterable<@NonNull ITmfStateSystem> getStateSystems() {
    ITmfStateSystemBuilder stateSystem = fStateSystem;
    if (stateSystem == null) {
        return Collections.EMPTY_SET;
    }//from   ww w  .jav a2  s.  co  m
    return Collections.singleton(stateSystem);
}

From source file:org.lockss.servlet.AuConfig.java

/** Create a form to edit a (possibly not-yet-existing) AU.
 * @param actions list of action buttons for bottom of form.  If an
 * element is a String, a button will be created for it.
 * @param au the AU//from   ww w . j  av a2s .c o  m
 * @param editable true if the form should be editable.  (Not all the
 * fields will be editable in any case).
 */
private Form createAuEditForm(List actions, AuProxy au, boolean editable) throws IOException {

    boolean isNew = au == null;
    Collection noEditKeys = Collections.EMPTY_SET;
    Configuration initVals;

    if (titleConfig != null) {
        initVals = titleConfig.getConfig();
        noEditKeys = titleConfig.getUnEditableKeys();
    } else if (formConfig != null) {
        initVals = formConfig;
    } else if (auConfig != null) {
        initVals = auConfig;
    } else {
        initVals = ConfigManager.EMPTY_CONFIGURATION;
    }

    Form frm = ServletUtil.newForm(srvURL(myServletDescr()));

    ServletUtil.layoutAuPropsTable(this, frm, getAuConfigParams(), getDefKeys(), initVals, noEditKeys, isNew,
            getEditKeys(), editable);

    if (isNew) {
        addRepoChoice(frm);
        addPlugId(frm, plugin);
    } else {
        addAuId(frm, au);
    }

    ServletUtil.layoutAuPropsButtons(this, frm, actions.iterator(), ACTION_TAG);

    return frm;
}

From source file:org.niord.core.publication.PublicationService.java

/**
 * When a publication enters the RECORDING status, check if any of the currently published messages
 * should be assigned to the associated message tag.
  * @param publication the publication/*from w w w  .ja  va  2 s.  co m*/
 */
private void startRecordingPublication(Publication publication) {

    // Sanity checks
    if (publication.getStatus() != RECORDING || publication.getMessageTag() == null
            || StringUtils.isBlank(publication.getMessageTagFilter())) {
        return;
    }

    Set<String> seriesIds = publication.getDomain() != null ? publication.getDomain().getMessageSeries()
            .stream().map(MessageSeries::getSeriesId).collect(Collectors.toSet()) : Collections.EMPTY_SET;

    // Look up all published messages
    MessageSearchParams params = new MessageSearchParams().seriesIds(seriesIds).statuses(PUBLISHED);
    List<Message> messages = messageService.search(params).getData();

    // For each message, check if it should be included in the associated message tag
    messages.forEach(m -> checkMessageForRecordingPublication(publication, m, PHASE_START_RECORDING));
}

Example usage for java.util Collections EMPTY_SET

Introduction

Prototype

Document

Usage