Java Multimap.isEmpty方法代码示例

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
public static <K, V> Multimap<K, V> combine(Iterable<Multimap<K, V>> maps) {
    Multimap<K, V> singleton = null;
    ImmutableMultimap.Builder<K, V> builder = null;
    for(Multimap<K, V> map : maps) {
        if(!map.isEmpty()) {
            if(singleton == null) {
                singleton = map;
            } else {
                if(builder == null) {
                    builder = ImmutableMultimap.builder();
                }
                builder.putAll(singleton);
                builder.putAll(map);
            }
        }
    }

    if(builder != null) {
        return builder.build();
    } else if(singleton != null) {
        return singleton;
    } else {
        return ImmutableMultimap.of();
    }
}
 

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
public Symbol addComparisons(Symbol symbol, DocTableInfo tableInfo) {
    Multimap<ReferenceInfo, GeneratedReferenceInfo> referencedSingleReferences = extractGeneratedReferences(tableInfo);
    if (referencedSingleReferences.isEmpty()) {
        return symbol;
    } else {
        Context ctx = new Context(referencedSingleReferences);
        return process(symbol, ctx);
    }
}
 

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
static void assertEmpty(Multimap<?, ?> multimap) {
  if (!multimap.isEmpty()) {
    fail("Not true that " + multimap + " is empty");
  }
}
 

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
private synchronized void setAllInstitutions(Map<Long, InstitutionStatus> map)
{
	allInstitutions = ImmutableMap.copyOf(map);

	Multimap<Long, Institution> newlyAvailable = ArrayListMultimap.create();
	Multimap<Long, Institution> newlyUnavailable = ArrayListMultimap.create(availableInstitutions);
	Builder<Long, Institution> availableBuilder = ImmutableMultimap.builder();
	ImmutableMap.Builder<Long, Long> schemaBuilder = ImmutableMap.builder();
	ImmutableMap.Builder<Long, Institution> instBuilder = ImmutableMap.builder();
	for( Entry<Long, InstitutionStatus> entry : allInstitutions.entrySet() )
	{
		InstitutionStatus instStatus = entry.getValue();
		Institution institution = instStatus.getInstitution();
		Long schemaId = instStatus.getSchemaId();
		if( instStatus.isValid() && institution.isEnabled() )
		{
			availableBuilder.put(schemaId, institution);
			if( !newlyUnavailable.remove(schemaId, institution) )
			{
				newlyAvailable.put(schemaId, institution);
			}
		}
		long uniqueId = institution.getUniqueId();
		schemaBuilder.put(uniqueId, schemaId);
		instBuilder.put(uniqueId, institution);
	}

	availableInstitutions = availableBuilder.build();
	schemaMap = schemaBuilder.build();
	instMap = instBuilder.build();

	if( !newlyAvailable.isEmpty() )
	{
		eventService.publishApplicationEvent(new InstitutionEvent(InstitutionEventType.AVAILABLE, newlyAvailable));
	}

	if( !newlyUnavailable.isEmpty() )
	{
		eventService
				.publishApplicationEvent(new InstitutionEvent(InstitutionEventType.UNAVAILABLE, newlyUnavailable));
	}
}
 

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
/**
 * Reentrant. If {@code instance} was registered for injection at injector-creation time, this
 * method will ensure that all its members have been injected before returning.
 */
public T get(Errors errors) throws ErrorsException {
  // skipping acquiring lock if initialization is already finished
  if (state == InjectableReferenceState.READY) {
    return instance;
  }

  // acquire lock for current binding to initialize an instance
  Multimap<?, ?> lockCycle = lock.lockOrDetectPotentialLocksCycle();
  if (!lockCycle.isEmpty()) {
    // Potential deadlock detected and creation lock is not taken.
    // According to injectAll()'s contract return non-initialized instance.

    // This condition should not be possible under the current Guice implementation.
    // This clause exists for defensive programming purposes.

    // Reasoning:
    // get() is called either directly from injectAll(), holds no locks and can not create
    // a cycle, or it is called through a singleton scope, which resolves deadlocks by itself.
    // Before calling get() object has to be requested for injection.
    // Initializer.requestInjection() is called either for constant object bindings, which wrap
    // creation into a Singleton scope, or from Binder.requestInjection(), which
    // has to use Singleton scope to reuse the same InjectableReference to potentially
    // create a lock cycle.
    return instance;
  }
  try {
    // lock acquired, current thread owns this instance initialization
    switch (state) {
      case READY:
        return instance;
      // When instance depends on itself in the same thread potential dead lock
      // is not detected. We have to prevent a stack overflow and we use
      // an "injecting" stage to short-circuit a call.
      case INJECTING:
        return instance;
      case VALIDATED:
        state = InjectableReferenceState.INJECTING;
        break;
      case NEW:
        throw new IllegalStateException("InjectableReference is not validated yet");
      default:
        throw new IllegalStateException("Unknown state: " + state);
    }

    // if in Stage.TOOL, we only want to inject & notify toolable injection points.
    // (otherwise we'll inject all of them)
    membersInjector.injectAndNotify(instance,
        errors.withSource(source),
        key,
        provisionCallback,
        source,
        injector.options.stage == Stage.TOOL);

    // mark instance as ready to skip a lock on subsequent calls
    state = InjectableReferenceState.READY;
    return instance;
  } finally {
    // always release our creation lock, even on failures
    lock.unlock();
  }
}
 

import com.google.common.collect.Multimap; //导入方法依赖的package包/类
/**
  * Deallocates unused labels to device pools.
  *
  * @param tunnel tunnel between ingress to egress
  */
 public void releaseLabel(Tunnel tunnel) {
    boolean isLastLabelToPush = false;

    checkNotNull(labelRsrcService, LABEL_RESOURCE_SERVICE_NULL);
    checkNotNull(pceStore, PCE_STORE_NULL);

    Multimap<DeviceId, LabelResource> release = ArrayListMultimap.create();
    PceccTunnelInfo pceccTunnelInfo = pceStore.getTunnelInfo(tunnel.tunnelId());
    if (pceccTunnelInfo != null) {
        List<LspLocalLabelInfo> lspLocalLabelInfoList = pceccTunnelInfo.lspLocalLabelInfoList();
        if ((lspLocalLabelInfoList != null) && (lspLocalLabelInfoList.size() > 0)) {
            for (Iterator<LspLocalLabelInfo> iterator = lspLocalLabelInfoList.iterator(); iterator.hasNext();) {
                LspLocalLabelInfo lspLocalLabelInfo = iterator.next();
                DeviceId deviceId = lspLocalLabelInfo.deviceId();
                LabelResourceId inLabelId = lspLocalLabelInfo.inLabelId();
                LabelResourceId outLabelId = lspLocalLabelInfo.outLabelId();
                PortNumber inPort = lspLocalLabelInfo.inPort();
                PortNumber outPort = lspLocalLabelInfo.outPort();

                // Check whether this is last link label to push
                if (!iterator.hasNext()) {
                   isLastLabelToPush = true;
                }

                // Push into device
                if ((inLabelId != null) && (inPort != null)) {
                    installLocalLabelRule(deviceId, inLabelId, inPort, tunnel.tunnelId(), isLastLabelToPush,
                                          Long.valueOf(LabelType.IN_LABEL.value), Objective.Operation.REMOVE);
                }

                if ((outLabelId != null) && (outPort != null)) {
                    installLocalLabelRule(deviceId, outLabelId, outPort, tunnel.tunnelId(), isLastLabelToPush,
                                          Long.valueOf(LabelType.OUT_LABEL.value), Objective.Operation.REMOVE);
                }

                // List is stored from egress to ingress. So, using IN label id to release.
                // Only one local label is assigned to device (destination node)
                // and that is used as OUT label for source node.
                // No need to release label for last node in the list from pool because label was not allocated to
                // ingress node (source node).
                if ((iterator.hasNext()) && (inLabelId != null)) {
                    LabelResource labelRsc = new DefaultLabelResource(deviceId, inLabelId);
                    release.put(deviceId, labelRsc);
                }
            }
        }

        // Release from label pool
        if (!release.isEmpty()) {
           labelRsrcService.releaseToDevicePool(release);
        }

        // Remove tunnel info only if tunnel consumer id is not saved.
        // If tunnel consumer id is saved, this tunnel info will be removed during releasing bandwidth.
        if (pceccTunnelInfo.tunnelConsumerId() == null) {
            pceStore.removeTunnelInfo(tunnel.tunnelId());
        }
    } else {
        log.error("Unable to find PCECC tunnel info in store for a tunnel {}.", tunnel.toString());
    }
}