本文整理了Java中com.apollographql.apollo.api.internal.Optional.isPresent()方法的一些代码示例，展示了Optional.isPresent()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Optional.isPresent()方法的具体详情如下：
包路径：com.apollographql.apollo.api.internal.Optional
类名称：Optional
方法名：isPresent

Optional.isPresent介绍

[英]Returns true if this holder contains a (non-null) instance.

Comparison to java.util.Optional: no differences.
[中]如果此持有者包含（非空）实例，则返回true。
与java的比较。util。可选：无差异。

代码示例

代码示例来源：origin: apollographql/apollo-android

@Override public Map<Class, Map<String, Record>> dump() {
 Map<String, Record> records = new LinkedHashMap<>();
 for (Map.Entry<String, RecordJournal> entry : lruCache.asMap().entrySet()) {
  records.put(entry.getKey(), entry.getValue().snapshot);
 }
 Map<Class, Map<String, Record>> dump = new LinkedHashMap<>();
 dump.put(this.getClass(), Collections.unmodifiableMap(records));
 if (nextCache().isPresent()) {
  dump.putAll(nextCache().get().dump());
 }
 return dump;
}

代码示例来源：origin: apollographql/apollo-android

private void log(int priority, @NotNull String message, @Nullable Throwable t, Object... args) {
  if (logger.isPresent()) {
   logger.get().log(priority, message, Optional.fromNullable(t), args);
  }
 }
}

代码示例来源：origin: apollographql/apollo-android

@Override public Map<Class, Map<String, Record>> dump() {
  Map<Class, Map<String, Record>> dump = new LinkedHashMap<>();
  dump.put(this.getClass(), Collections.unmodifiableMap(new LinkedHashMap<>(lruCache.asMap())));
  if (nextCache().isPresent()) {
   dump.putAll(nextCache().get().dump());
  }
  return dump;
 }
}

代码示例来源：origin: apollographql/apollo-android

public final NormalizedCacheFactory<T> chain(@NotNull NormalizedCacheFactory factory) {
  checkNotNull(factory, "factory == null");

  NormalizedCacheFactory leafFactory = this;
  while (leafFactory.nextFactory.isPresent()) {
   leafFactory = (NormalizedCacheFactory) leafFactory.nextFactory.get();
  }
  leafFactory.nextFactory = Optional.of(factory);

  return this;
 }
}

代码示例来源：origin: apollographql/apollo-android

public final NormalizedCache chain(@NotNull NormalizedCache cache) {
 checkNotNull(cache, "cache == null");
 NormalizedCache leafCache = this;
 while (leafCache.nextCache.isPresent()) {
  leafCache = leafCache.nextCache.get();
 }
 leafCache.nextCache = Optional.of(cache);
 return this;
}

代码示例来源：origin: apollographql/apollo-android

@Override public synchronized void cancel() {
 switch (state.get()) {
  case ACTIVE:
   state.set(CANCELED);
   try {
    interceptorChain.dispose();
    if (queryReFetcher.isPresent()) {
     queryReFetcher.get().cancel();
    }
   } finally {
    tracker.unregisterCall(this);
    originalCallback.set(null);
   }
   break;
  case IDLE:
   state.set(CANCELED);
   break;
  case CANCELED:
  case TERMINATED:
   // These are not illegal states, but cancelling does nothing
   break;
  default:
   throw new IllegalStateException("Unknown state");
 }
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onResponse(@NotNull InterceptorResponse response) {
 if (disposed) return;
 Optional<InterceptorRequest> retryRequest = handleProtocolNegotiation(request, response);
 if (retryRequest.isPresent()) {
  chain.proceedAsync(retryRequest.get(), dispatcher, callBack);
 } else {
  callBack.onResponse(response);
  callBack.onCompleted();
 }
}

代码示例来源：origin: apollographql/apollo-android

@Override public void run() {
  try {
   if (request.optimisticUpdates.isPresent()) {
    Operation.Data optimisticUpdates = request.optimisticUpdates.get();
    apolloStore.writeOptimisticUpdatesAndPublish(request.operation, optimisticUpdates, request.uniqueId)
      .execute();
   }
  } catch (Exception e) {
   logger.e(e, "failed to write operation optimistic updates, for: %s", request.operation);
  }
 }
});

代码示例来源：origin: apollographql/apollo-android

@Test
public void testIsPresentYes() {
 assertTrue(Optional.of("training").isPresent());
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onCompleted() {
 Optional<Callback<T>> callback = terminate();
 if (queryReFetcher.isPresent()) {
  queryReFetcher.get().refetch();
 }
 if (!callback.isPresent()) {
  logger.d("onCompleted for operation: %s. No callback present.", operation().name().name());
  return;
 }
 callback.get().onStatusEvent(StatusEvent.COMPLETED);
}

代码示例来源：origin: apollographql/apollo-android

public final NormalizedCache createChain(final RecordFieldJsonAdapter recordFieldAdapter) {
 if (nextFactory.isPresent()) {
  return create(recordFieldAdapter)
    .chain(nextFactory.map(new Function<NormalizedCacheFactory, NormalizedCache>() {
     @NotNull @Override public NormalizedCache apply(@NotNull NormalizedCacheFactory factory) {
      return factory.createChain(recordFieldAdapter);
     }
    }).get());
 } else {
  return create(recordFieldAdapter);
 }
}

代码示例来源：origin: apollographql/apollo-android

@Override public void willResolveObject(ResponseField field, Optional<R> objectSource) {
 pathStack.push(path);
 CacheKey cacheKey = objectSource.isPresent() ? resolveCacheKey(field, objectSource.get()) : CacheKey.NO_KEY;
 String cacheKeyValue = cacheKey.key();
 if (cacheKey.equals(CacheKey.NO_KEY)) {
  cacheKeyValue = pathToString();
 } else {
  path = new ArrayList<>();
  path.add(cacheKeyValue);
 }
 recordStack.push(currentRecordBuilder.build());
 currentRecordBuilder = Record.builder(cacheKeyValue);
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onResponse(@NotNull final ApolloInterceptor.InterceptorResponse response) {
 Optional<Callback<T>> callback = responseCallback();
 if (!callback.isPresent()) {
  logger.d("onResponse for operation: %s. No callback present.", operation().name().name());
  return;
 }
 //noinspection unchecked
 callback.get().onResponse(response.parsedResponse.get());
}

代码示例来源：origin: apollographql/apollo-android

@Override public void didResolveObject(ResponseField field, Optional<R> objectSource) {
 path = pathStack.pop();
 if (objectSource.isPresent()) {
  Record completedRecord = currentRecordBuilder.build();
  valueStack.push(new CacheReference(completedRecord.key()));
  dependentKeys.add(completedRecord.key());
  recordSet.merge(completedRecord);
 }
 currentRecordBuilder = recordStack.pop().toBuilder();
}

代码示例来源：origin: apollographql/apollo-android

@Test
public void testAbsent() {
 Optional<String> optionalName = Optional.absent();
 assertFalse(optionalName.isPresent());
}

代码示例来源：origin: apollographql/apollo-android

@Test
public void testIsPresentNo() {
 assertFalse(Optional.absent().isPresent());
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onResponse(@NotNull ApolloInterceptor.InterceptorResponse response) {
 Response httpResponse = response.httpResponse.get();
 try {
  Optional<Callback> callback = terminate();
  if (!callback.isPresent()) {
   logger.d("onResponse for prefetch operation: %s. No callback present.", operation().name().name());
   return;
  }
  if (httpResponse.isSuccessful()) {
   callback.get().onSuccess();
  } else {
   callback.get().onHttpError(new ApolloHttpException(httpResponse));
  }
 } finally {
  httpResponse.close();
 }
}

代码示例来源：origin: apollographql/apollo-android

LruNormalizedCache(EvictionPolicy evictionPolicy) {
 final CacheBuilder<Object, Object> lruCacheBuilder = CacheBuilder.newBuilder();
 if (evictionPolicy.maxSizeBytes().isPresent()) {
  lruCacheBuilder.maximumWeight(evictionPolicy.maxSizeBytes().get())
    .weigher(new Weigher<String, Record>() {
     @Override public int weigh(String key, Record value) {
      return key.getBytes(Charset.defaultCharset()).length + value.sizeEstimateBytes();
     }
    });
 }
 if (evictionPolicy.maxEntries().isPresent()) {
  lruCacheBuilder.maximumSize(evictionPolicy.maxEntries().get());
 }
 if (evictionPolicy.expireAfterAccess().isPresent()) {
  lruCacheBuilder.expireAfterAccess(evictionPolicy.expireAfterAccess().get(),
    evictionPolicy.expireAfterAccessTimeUnit().get());
 }
 if (evictionPolicy.expireAfterWrite().isPresent()) {
  lruCacheBuilder.expireAfterWrite(evictionPolicy.expireAfterWrite().get(),
    evictionPolicy.expireAfterWriteTimeUnit().get());
 }
 lruCache = lruCacheBuilder.build();
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onFailure(@NotNull ApolloException e) {
 Optional<Callback> callback = terminate();
 if (!callback.isPresent()) {
  logger.e(e, "onFailure for prefetch operation: %s. No callback present.", operation().name().name());
  return;
 }
 if (e instanceof ApolloHttpException) {
  callback.get().onHttpError((ApolloHttpException) e);
 } else if (e instanceof ApolloNetworkException) {
  callback.get().onNetworkError((ApolloNetworkException) e);
 } else {
  callback.get().onFailure(e);
 }
}

代码示例来源：origin: apollographql/apollo-android

@Override public void onFailure(@NotNull ApolloException e) {
 Optional<Callback<T>> callback = terminate();
 if (!callback.isPresent()) {
  logger.d(e, "onFailure for operation: %s. No callback present.", operation().name().name());
  return;
 }
 if (e instanceof ApolloHttpException) {
  callback.get().onHttpError((ApolloHttpException) e);
 } else if (e instanceof ApolloParseException) {
  callback.get().onParseError((ApolloParseException) e);
 } else if (e instanceof ApolloNetworkException) {
  callback.get().onNetworkError((ApolloNetworkException) e);
 } else {
  callback.get().onFailure(e);
 }
}