Example usage for java.util Deque isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:org.jboss.as.test.integration.logging.profiles.CommonsLoggingServiceActivator.java

private String getFirstValue(final Map<String, Deque<String>> params, final String key) {
    if (params.containsKey(key)) {
        final Deque<String> values = params.get(key);
        if (values != null && !values.isEmpty()) {
            return values.getFirst();
        }//from  w ww.  jav  a2 s  .co m
    }
    return null;
}

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From source file:org.apache.tajo.engine.planner.global.ParallelExecutionQueue.java

@Override
public synchronized ExecutionBlock[] next(ExecutionBlockId doneNow) {
    executed.add(doneNow);//from   w  w  w.j a v a2 s.  c  om

    int remaining = 0;
    for (Deque<ExecutionBlock> queue : executable) {
        if (!queue.isEmpty() && isExecutableNow(queue.peekLast())) {
            LOG.info("Next executable block " + queue.peekLast());
            return new ExecutionBlock[] { queue.removeLast() };
        }
        remaining += queue.size();
    }
    return remaining > 0 ? new ExecutionBlock[0] : null;
}

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From source file:com.espertech.esper.event.EventTypeUtility.java

public static EventPropertyDescriptor getNestablePropertyDescriptor(EventType target, Deque<Property> stack) {

    Property topProperty = stack.removeFirst();
    if (stack.isEmpty()) {
        return target.getPropertyDescriptor(((PropertyBase) topProperty).getPropertyNameAtomic());
    }/*from w w w  . j  a va 2 s. c o m*/

    if (!(topProperty instanceof SimpleProperty)) {
        return null;
    }
    SimpleProperty simple = (SimpleProperty) topProperty;

    FragmentEventType fragmentEventType = target.getFragmentType(simple.getPropertyNameAtomic());
    if (fragmentEventType == null || fragmentEventType.getFragmentType() == null) {
        return null;
    }
    return getNestablePropertyDescriptor(fragmentEventType.getFragmentType(), stack);
}

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From source file:org.seedstack.spring.internal.SpringTransactionStatusLink.java

TransactionStatus pop() {
    Deque<TransactionStatus> transactionStatuses = perThreadObjectContainer.get();
    TransactionStatus transactionStatus = transactionStatuses.pop();
    if (transactionStatuses.isEmpty()) {
        perThreadObjectContainer.remove();
    }//from  w w w.  j a  va  2s.c  o m
    return transactionStatus;
}

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From source file:org.structnetalign.merge.DistanceClusterer.java

/**
 *
 * @param graph/*from w ww .j a  v  a  2s . c o m*/
 * @param roots
 * @return For each root, the set of other roots that are easily reachable, including the parent root
 */
public final Map<V, Set<V>> transform(Graph<V, E> graph, Collection<V> roots) {

    Map<V, Set<V>> reachableMap = new HashMap<V, Set<V>>();

    for (V root : roots) {

        Set<V> reachable = new HashSet<>();
        HashSet<V> unvisited = new HashSet<V>(graph.getVertices());

        // a map from every vertex to the edge used to get to it
        // works because only visit a vertex once
        HashMap<V, E> edgesTaken = new HashMap<V, E>();

        Deque<V> queue = new LinkedList<V>();
        queue.add(root);
        reachable.add(root);

        while (!queue.isEmpty()) {

            V vertex = queue.remove();
            E edge = edgesTaken.get(vertex);
            unvisited.remove(vertex);

            // stop traversing if we're too far
            if (!isWithinRange(root, vertex))
                continue;

            reachable.add(vertex); // not that this is AFTER the within-range check

            if (edge != null)
                visit(vertex, edge); // this is the ONLY place where we "officially" VISIT a vertex

            Collection<V> neighbors = graph.getNeighbors(vertex);
            for (V neighbor : neighbors) {
                if (unvisited.contains(neighbor)) {
                    queue.add(neighbor);
                    E edgeToNeighbor = graph.findEdge(vertex, neighbor);
                    edgesTaken.put(neighbor, edgeToNeighbor);
                }
            }

            unvisit(vertex, edge); // this is the ONLY place where we "officially" UNVISIT a vertex

        }

        reachableMap.put(root, reachable);

    }

    return reachableMap;
}

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From source file:eu.openanalytics.rsb.rservi.CircularRServiUriSelector.java

public URI getUriForApplication(final String applicationName) {
    if ((circularApplicationUris == null) || (circularApplicationUris.isEmpty())) {
        return configuration.getDefaultRserviPoolUri();
    }//from   w w w  .ja  v  a 2 s  .  c o m

    final Deque<URI> applicationRserviPoolUris = circularApplicationUris.get(applicationName);

    final boolean applicationHasNoSpecificUris = applicationRserviPoolUris == null
            || applicationRserviPoolUris.isEmpty();

    return applicationHasNoSpecificUris ? configuration.getDefaultRserviPoolUri()
            : getCircular(applicationRserviPoolUris);
}

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From source file:com.core.controller.AlgoritmoController.java

public static String busquedaProfundidad(Grafo g, String inicio, String fin) {
    Deque<String> pila = new ArrayDeque<>();
    Deque<String> padresPila = new ArrayDeque<>();
    List<String> explorados = new ArrayList<>();
    List<String> padresExplorados = new ArrayList<>();
    String nodoActual, nodoPadre;
    String result = "Algoritmo de Busqueda Primero en Profundidad";
    result += "\nCantidad de nodos: " + g.getNodos().size();
    result += "\nCantidad de aristas: " + g.getAristas().size();
    pila.push(inicio);//www .j  av  a 2  s .com
    padresPila.push("#");
    while (true) {
        result += "\nPila: " + Arrays.toString(pila.toArray());
        if (pila.isEmpty()) {
            result += "\nNo se encontro el nodo destino";
            break;
        }
        nodoActual = pila.pop();
        nodoPadre = padresPila.pop();
        explorados.add(nodoActual);
        padresExplorados.add(nodoPadre);
        if (nodoActual.equals(fin)) {
            result += "\nNodo destino alcanzado"; //Mostrar camino
            String nodo = nodoActual;
            String secuenciaResultado = "";
            while (nodo != "#") {
                secuenciaResultado = nodo + " " + secuenciaResultado;
                nodo = padresExplorados.get(explorados.indexOf(nodo));
            }
            result += "\nCamino solucion: " + secuenciaResultado;
            break;
        }
        List<String> vecinos = g.nodosVecinos(nodoActual);
        for (int i = vecinos.size() - 1; i >= 0; i--) {
            String a = vecinos.get(i);
            if (!explorados.contains(a)) {
                if (pila.contains(a)) {
                    pila.remove(a);
                    padresPila.remove(nodoActual);
                }
                pila.push(a);
                padresPila.push(nodoActual);
            }
        }
    }
    return result;
}

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From source file:org.lunarray.model.descriptor.builder.annotation.resolver.entity.def.DefaultEntityResolver.java

/** {@inheritDoc} */
@Override/*from  w  w  w  .ja  va  2  s  . c o m*/
public DescribedEntity<?> resolveEntity(final Class<?> entityType) {
    DefaultEntityResolver.LOGGER.debug("Resolving entity {}", entityType);
    Validate.notNull(entityType, "Entity type may not be null.");
    @SuppressWarnings("unchecked")
    final EntityBuilder<?> builder = DescribedEntity.createBuilder().entityType((Class<Object>) entityType);
    final List<Class<?>> hierarchy = new LinkedList<Class<?>>();
    if (this.searchHierarchyResolver) {
        final Deque<Class<?>> types = new LinkedList<Class<?>>();
        final Set<Class<?>> processed = new HashSet<Class<?>>();
        types.add(entityType);
        while (!types.isEmpty()) {
            final Class<?> next = types.pop();
            hierarchy.add(next);
            final Class<?> superType = next.getSuperclass();
            if (!CheckUtil.isNull(superType) && !processed.contains(superType)) {
                types.add(superType);
            }
            for (final Class<?> interfaceType : next.getInterfaces()) {
                if (!processed.contains(interfaceType)) {
                    types.add(interfaceType);
                }
            }
            processed.add(next);
        }
    } else {
        hierarchy.add(entityType);
    }
    for (final Class<?> type : hierarchy) {
        for (final Annotation a : type.getAnnotations()) {
            builder.addAnnotation(a);
        }
    }
    final DescribedEntity<?> result = builder.build();
    DefaultEntityResolver.LOGGER.debug("Resolved entity {} for type {}", result, entityType);
    return result;
}

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From source file:org.polymap.rhei.form.batik.BatikFormContainer.java

@Override
protected void updateEnabled() {
    if (pageBody == null || pageBody.isDisposed()) {
        return;/*from  w ww  . ja va2s. co m*/
    }

    Deque<Control> deque = new LinkedList(Collections.singleton(pageBody));
    while (!deque.isEmpty()) {
        Control control = deque.pop();

        String variant = (String) control.getData(RWT.CUSTOM_VARIANT);
        log.debug("VARIANT: " + variant + " (" + control.getClass().getSimpleName() + ")");

        // form fields
        if (variant == null || variant.equals(CSS_FORMFIELD) || variant.equals(CSS_FORMFIELD_DISABLED)
                || variant.equals(BaseFieldComposite.CUSTOM_VARIANT_VALUE)) {
            UIUtils.setVariant(control, enabled ? CSS_FORMFIELD : CSS_FORMFIELD_DISABLED);
        }
        // form
        else if (variant.equals(CSS_FORM) || variant.equals(CSS_FORM_DISABLED)) {
            UIUtils.setVariant(control, enabled ? CSS_FORM : CSS_FORM_DISABLED);
        }

        //            // labeler Label
        //            String labelVariant = (String)control.getData( WidgetUtil.CUSTOM_VARIANT );
        //            if (control instanceof Label
        //                    && (labelVariant.equals( CSS_FORMFIELD ) || labelVariant.equals( CSS_FORMFIELD_DISABLED ))) {
        //                control.setFont( enabled 
        //                        ? JFaceResources.getFontRegistry().get( JFaceResources.DEFAULT_FONT )
        //                        : JFaceResources.getFontRegistry().getBold( JFaceResources.DEFAULT_FONT ) );
        //
        //                if (!enabled) {
        //                    control.setBackground( Graphics.getColor( 0xED, 0xEF, 0xF1 ) );
        //                }
        //            }
        // Composite
        if (control instanceof Composite) {
            control.setEnabled(enabled);

            deque.addAll(Arrays.asList(((Composite) control).getChildren()));
        }
        variant = (String) control.getData(RWT.CUSTOM_VARIANT);
        log.debug("      -> " + variant + " (" + control.getClass().getSimpleName() + ")");
    }
}

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From source file:org.polymap.rhei.form.batik.BatikFilterContainer.java

@Override
protected void updateEnabled() {
    if (pageBody == null || pageBody.isDisposed()) {
        return;//  www.j a  va2s  . c o  m
    }

    Deque<Control> deque = new LinkedList(Collections.singleton(pageBody));
    while (!deque.isEmpty()) {
        Control control = deque.pop();

        String variant = (String) control.getData(RWT.CUSTOM_VARIANT);
        log.debug("VARIANT: " + variant + " (" + control.getClass().getSimpleName() + ")");

        // form fields
        if (variant == null || variant.equals(BatikFormContainer.CSS_FORMFIELD)
                || variant.equals(BatikFormContainer.CSS_FORMFIELD_DISABLED)
                || variant.equals(BaseFieldComposite.CUSTOM_VARIANT_VALUE)) {
            UIUtils.setVariant(control,
                    enabled ? BatikFormContainer.CSS_FORMFIELD : BatikFormContainer.CSS_FORMFIELD_DISABLED);
        }
        // form
        else if (variant.equals(BatikFormContainer.CSS_FORM)
                || variant.equals(BatikFormContainer.CSS_FORM_DISABLED)) {
            UIUtils.setVariant(control,
                    enabled ? BatikFormContainer.CSS_FORM : BatikFormContainer.CSS_FORM_DISABLED);
        }

        //            // labeler Label
        //            String labelVariant = (String)control.getData( WidgetUtil.CUSTOM_VARIANT );
        //            if (control instanceof Label
        //                    && (labelVariant.equals( CSS_FORMFIELD ) || labelVariant.equals( CSS_FORMFIELD_DISABLED ))) {
        //                control.setFont( enabled 
        //                        ? JFaceResources.getFontRegistry().get( JFaceResources.DEFAULT_FONT )
        //                        : JFaceResources.getFontRegistry().getBold( JFaceResources.DEFAULT_FONT ) );
        //
        //                if (!enabled) {
        //                    control.setBackground( Graphics.getColor( 0xED, 0xEF, 0xF1 ) );
        //                }
        //            }
        // Composite
        if (control instanceof Composite) {
            control.setEnabled(enabled);

            deque.addAll(Arrays.asList(((Composite) control).getChildren()));
        }
        variant = (String) control.getData(RWT.CUSTOM_VARIANT);
        log.debug("      -> " + variant + " (" + control.getClass().getSimpleName() + ")");
    }
}

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