com.apollographql.apollo.api.internal.Optional.orNull()方法的使用及代码示例

x33g5p2x  于2022-01-26 转载在 其他  
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本文整理了Java中com.apollographql.apollo.api.internal.Optional.orNull()方法的一些代码示例，展示了Optional.orNull()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.orNull()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：orNull

Optional.orNull介绍

[英]Returns the contained instance if it is present; null otherwise. If the instance is known to be present, use #get() instead.

Comparison to java.util.Optional: this method is equivalent to Java 8's Optional.orElse(null).
[中]返回包含的实例（如果存在）；否则为空。如果已知实例存在，请使用#get（）代替。
与java的比较。util。可选：此方法相当于Java8的可选方法。orElse（空）。

代码示例

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

private synchronized void activate(Optional<ApolloCall.Callback<T>> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerQueryWatcher(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

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

private synchronized void activate(Optional<ApolloPrefetch.Callback> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerPrefetchCall(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

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

@SuppressWarnings("ResultOfMethodCallIgnored")
private synchronized void activate(Optional<Callback<T>> callback) {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerCall(this);
   callback.apply(new Action<Callback<T>>() {
    @Override public void apply(@NotNull Callback<T> callback) {
     callback.onStatusEvent(StatusEvent.SCHEDULED);
    }
   });
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

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

public Builder toBuilder() {
 return new Builder(operation)
   .cacheHeaders(cacheHeaders)
   .fetchFromCache(fetchFromCache)
   .optimisticUpdates(optimisticUpdates.orNull())
   .sendQueryDocument(sendQueryDocument);
}

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

@Nullable @Override public Record loadRecord(@NotNull final String key, @NotNull final CacheHeaders cacheHeaders) {
 checkNotNull(key, "key == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 try {
  final Optional<Record> nonOptimisticRecord = nextCache()
    .flatMap(new Function<NormalizedCache, Optional<Record>>() {
     @NotNull @Override public Optional<Record> apply(@NotNull NormalizedCache cache) {
      return Optional.fromNullable(cache.loadRecord(key, cacheHeaders));
     }
    });
  final RecordJournal journal = lruCache.getIfPresent(key);
  if (journal != null) {
   return nonOptimisticRecord.map(new Function<Record, Record>() {
    @NotNull @Override public Record apply(@NotNull Record record) {
     Record result = record.clone();
     result.mergeWith(journal.snapshot);
     return result;
    }
   }).or(journal.snapshot.clone());
  } else {
   return nonOptimisticRecord.orNull();
  }
 } catch (Exception ignore) {
  return null;
 }
}

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

@Test
public void testOrNullPresent() {
 assertEquals("a", Optional.of("a").orNull());
}

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

@Test
public void testOrNullAbsent() {
 assertNull(Optional.absent().orNull());
}

代码示例来源：origin: com.amazonaws/aws-android-sdk-appsync-runtime

private synchronized void activate(Optional<GraphQLCall.Callback<T>> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerQueryWatcher(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: com.amazonaws/aws-android-sdk-appsync-runtime

private synchronized void activate(Optional<Callback> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerPrefetchCall(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

private synchronized void activate(Optional<Callback> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerPrefetchCall(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

private synchronized void activate(Optional<GraphQLCall.Callback<T>> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerQueryWatcher(this);
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: com.amazonaws/aws-android-sdk-appsync-runtime

private synchronized void activate(Optional<Callback<T>> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerCall(this);
   callback.apply(new Action<Callback<T>>() {
    @Override public void apply(@Nonnull Callback<T> callback) {
     callback.onStatusEvent(StatusEvent.SCHEDULED);
    }
   });
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

private synchronized void activate(Optional<Callback<T>> callback) throws ApolloCanceledException {
 switch (state.get()) {
  case IDLE:
   originalCallback.set(callback.orNull());
   tracker.registerCall(this);
   callback.apply(new Action<Callback<T>>() {
    @Override public void apply(@Nonnull Callback<T> callback) {
     callback.onStatusEvent(StatusEvent.SCHEDULED);
    }
   });
   break;
  case CANCELED:
   throw new ApolloCanceledException("Call is cancelled.");
  case TERMINATED:
  case ACTIVE:
   throw new IllegalStateException("Already Executed");
  default:
   throw new IllegalStateException("Unknown state");
 }
 state.set(ACTIVE);
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

@Nullable public Record loadRecord(@Nonnull final String key, @Nonnull final CacheHeaders cacheHeaders) {
 return selectRecordForKey(key)
   .apply(new Action<Record>() {
    @Override
    public void apply(@Nonnull Record record) {
     if (cacheHeaders.hasHeader(EVICT_AFTER_READ)) {
      deleteRecord(key);
     }
    }
   })
   .or(nextCache().flatMap(new Function<NormalizedCache, Optional<Record>>() {
    @Nonnull @Override
    public Optional<Record> apply(@Nonnull NormalizedCache cache) {
     return Optional.fromNullable(cache.loadRecord(key, cacheHeaders));
    }
   }))
   .orNull();
}

代码示例来源：origin: com.amazonaws/aws-android-sdk-appsync-runtime

public Builder toBuilder() {
 return new Builder(operation)
   .cacheHeaders(cacheHeaders)
   .fetchFromCache(fetchFromCache)
   .optimisticUpdates(optimisticUpdates.orNull());
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

public Builder toBuilder() {
 return new Builder(operation)
   .cacheHeaders(cacheHeaders)
   .fetchFromCache(fetchFromCache)
   .optimisticUpdates(optimisticUpdates.orNull());
}

代码示例来源：origin: com.amazonaws/aws-android-sdk-appsync-runtime

@Nullable @Override public Record loadRecord(@Nonnull final String key, @Nonnull final CacheHeaders cacheHeaders) {
 checkNotNull(key, "key == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 try {
  final Optional<Record> nonOptimisticRecord = nextCache()
    .flatMap(new Function<NormalizedCache, Optional<Record>>() {
     @Nonnull @Override public Optional<Record> apply(@Nonnull NormalizedCache cache) {
      return Optional.fromNullable(cache.loadRecord(key, cacheHeaders));
     }
    });
  final RecordJournal journal = lruCache.getIfPresent(key);
  if (journal != null) {
   return nonOptimisticRecord.map(new Function<Record, Record>() {
    @Nonnull @Override public Record apply(@Nonnull Record record) {
     Record result = record.clone();
     result.mergeWith(journal.snapshot);
     return result;
    }
   }).or(journal.snapshot.clone());
  } else {
   return nonOptimisticRecord.orNull();
  }
 } catch (Exception ignore) {
  return null;
 }
}

代码示例来源：origin: awslabs/aws-mobile-appsync-sdk-android

@Nullable @Override public Record loadRecord(@Nonnull final String key, @Nonnull final CacheHeaders cacheHeaders) {
 checkNotNull(key, "key == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 try {
  final Optional<Record> nonOptimisticRecord = nextCache()
    .flatMap(new Function<NormalizedCache, Optional<Record>>() {
     @Nonnull @Override public Optional<Record> apply(@Nonnull NormalizedCache cache) {
      return Optional.fromNullable(cache.loadRecord(key, cacheHeaders));
     }
    });
  final RecordJournal journal = lruCache.getIfPresent(key);
  if (journal != null) {
   return nonOptimisticRecord.map(new Function<Record, Record>() {
    @Nonnull @Override public Record apply(@Nonnull Record record) {
     Record result = record.clone();
     result.mergeWith(journal.snapshot);
     return result;
    }
   }).or(journal.snapshot.clone());
  } else {
   return nonOptimisticRecord.orNull();
  }
 } catch (Exception ignore) {
  return null;
 }
}

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