com.apollographql.apollo.api.internal.Optional.map()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.map()方法的一些代码示例，展示了Optional.map()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.map()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：map

Optional.map介绍

暂无

代码示例

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

/**
 * @param record       The {@link Record} to merge.
 * @param cacheHeaders The {@link CacheHeaders} associated with the request which generated this record.
 * @return A set of record field keys that have changed. This set is returned by {@link Record#mergeWith(Record)}.
 */
@NotNull public Set<String> merge(@NotNull final Record record, @NotNull final CacheHeaders cacheHeaders) {
 checkNotNull(record, "apolloRecord == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 if (cacheHeaders.hasHeader(ApolloCacheHeaders.DO_NOT_STORE)) {
  return Collections.emptySet();
 }
 Set<String> nextCacheChangedKeys = nextCache().map(new Function<NormalizedCache, Set<String>>() {
  @NotNull @Override public Set<String> apply(@NotNull NormalizedCache cache) {
   return cache.merge(record, cacheHeaders);
  }
 }).or(Collections.<String>emptySet());
 Set<String> currentCacheChangedKeys = performMerge(record, cacheHeaders);
 Set<String> changedKeys = new HashSet<>();
 changedKeys.addAll(nextCacheChangedKeys);
 changedKeys.addAll(currentCacheChangedKeys);
 return changedKeys;
}

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

Set<String> cacheResponse(final InterceptorResponse networkResponse,
  final InterceptorRequest request) {
 final Optional<List<Record>> records = networkResponse.cacheRecords.map(
   new Function<Collection<Record>, List<Record>>() {
    @NotNull @Override public List<Record> apply(@NotNull Collection<Record> records) {
     final List<Record> result = new ArrayList<>(records.size());
     for (Record record : records) {
      result.add(record.toBuilder().mutationId(request.uniqueId).build());
     }
     return result;
    }
   }
 );
 if (!records.isPresent()) {
  return Collections.emptySet();
 }
 try {
  return apolloStore.writeTransaction(new Transaction<WriteableStore, Set<String>>() {
   @Nullable @Override public Set<String> execute(WriteableStore cache) {
    return cache.merge(records.get(), request.cacheHeaders);
   }
  });
 } catch (Exception e) {
  logger.e("Failed to cache operation response", e);
  return Collections.emptySet();
 }
}

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

/**
 * Calls through to {@link NormalizedCache#merge(Record, CacheHeaders)}. Implementations should override this method
 * if the underlying storage technology can offer an optimized manner to store multiple records.
 *
 * @param recordSet    The set of Records to merge.
 * @param cacheHeaders The {@link CacheHeaders} associated with the request which generated this record.
 * @return A set of record field keys that have changed. This set is returned by {@link Record#mergeWith(Record)}.
 */
@NotNull
public Set<String> merge(@NotNull final Collection<Record> recordSet, @NotNull final CacheHeaders cacheHeaders) {
 checkNotNull(recordSet, "recordSet == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 if (cacheHeaders.hasHeader(ApolloCacheHeaders.DO_NOT_STORE)) {
  return Collections.emptySet();
 }
 //noinspection ResultOfMethodCallIgnored
 Set<String> nextCacheChangedKeys = nextCache().map(new Function<NormalizedCache, Set<String>>() {
  @NotNull @Override public Set<String> apply(@NotNull NormalizedCache cache) {
   return cache.merge(recordSet, cacheHeaders);
  }
 }).or(Collections.<String>emptySet());
 Set<String> currentCacheChangedKeys = new HashSet<>();
 for (Record record : recordSet) {
  currentCacheChangedKeys.addAll(performMerge(record, cacheHeaders));
 }
 Set<String> changedKeys = new HashSet<>();
 changedKeys.addAll(nextCacheChangedKeys);
 changedKeys.addAll(currentCacheChangedKeys);
 return changedKeys;
}

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

@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 testMapPresentFunctionReturnsNull() {
 try {
  Optional<String> unused =
    Optional.of("a")
      .map(
        new Function<String, String>() {
         @Override
         public String apply(String input) {
          return null;
         }
        });
  fail("Should throw if Function returns null.");
 } catch (NullPointerException ignore) {
 }
}

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

@Test
public void testMapAbssentFunctionReturnsNull() {
 assertEquals(Optional.absent(),
   Optional.absent().map(
     new Function<Object, Object>() {
      @Override public Object apply(Object input) {
       return null;
      }
     }));
}

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

@Override public boolean remove(@NotNull final CacheKey cacheKey, final boolean cascade) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @NotNull @Override public Boolean apply(@NotNull NormalizedCache cache) {
   return cache.remove(cacheKey, cascade);
  }
 }).or(Boolean.FALSE);
 RecordJournal recordJournal = lruCache.getIfPresent(cacheKey.key());
 if (recordJournal != null) {
  lruCache.invalidate(cacheKey.key());
  result = true;
  if (cascade) {
   for (CacheReference cacheReference : recordJournal.snapshot.referencedFields()) {
    result = result & remove(CacheKey.from(cacheReference.key()), true);
   }
  }
 }
 return result;
}

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

@Override public boolean remove(@NotNull final CacheKey cacheKey, final boolean cascade) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result;
 result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @NotNull @Override public Boolean apply(@NotNull NormalizedCache cache) {
   return cache.remove(cacheKey, cascade);
  }
 }).or(Boolean.FALSE);
 Record record = lruCache.getIfPresent(cacheKey.key());
 if (record != null) {
  lruCache.invalidate(cacheKey.key());
  result = true;
  if (cascade) {
   for (CacheReference cacheReference : record.referencedFields()) {
    result = result & remove(CacheKey.from(cacheReference.key()), true);
   }
  }
 }
 return result;
}

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

@Test
public void testMapAbsent() {
 assertEquals(Optional.absent(), Optional.absent().map(Functions.identity()));
 assertEquals(Optional.absent(), Optional.absent().map(Functions.toStringFunction()));
}

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

@Test
public void testMapPresentToString() {
 assertEquals(Optional.of("42"), Optional.of(42).map(Functions.toStringFunction()));
}

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

@Test
public void testMapPresentIdentity() {
 assertEquals(Optional.of("a"), Optional.of("a").map(Functions.identity()));
}

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

@Nonnull @Override public Set<String> merge(@Nonnull final Record record, @Nonnull final CacheHeaders cacheHeaders) {
 checkNotNull(record, "record == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 return nextCache().map(new Function<NormalizedCache, Set<String>>() {
  @Nonnull @Override public Set<String> apply(@Nonnull NormalizedCache cache) {
   return cache.merge(record, cacheHeaders);
  }
 }).or(Collections.<String>emptySet());
}

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

@Nonnull @Override public Set<String> merge(@Nonnull final Record record, @Nonnull final CacheHeaders cacheHeaders) {
 checkNotNull(record, "record == null");
 checkNotNull(cacheHeaders, "cacheHeaders == null");
 return nextCache().map(new Function<NormalizedCache, Set<String>>() {
  @Nonnull @Override public Set<String> apply(@Nonnull NormalizedCache cache) {
   return cache.merge(record, cacheHeaders);
  }
 }).or(Collections.<String>emptySet());
}

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

@Override
public boolean remove(@Nonnull final CacheKey cacheKey) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result;
 result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @Nonnull @Override
  public Boolean apply(@Nonnull NormalizedCache cache) {
   return cache.remove(cacheKey);
  }
 }).or(Boolean.FALSE);
 return result | deleteRecord(cacheKey.key());
}

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

@Override public boolean remove(@Nonnull final CacheKey cacheKey) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @Nonnull @Override public Boolean apply(@Nonnull NormalizedCache cache) {
   return cache.remove(cacheKey);
  }
 }).or(Boolean.FALSE);
 if (lruCache.getIfPresent(cacheKey.key()) != null) {
  lruCache.invalidate(cacheKey.key());
  result = true;
 }
 return result;
}

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

@Override public boolean remove(@Nonnull final CacheKey cacheKey) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result;
 result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @Nonnull @Override public Boolean apply(@Nonnull NormalizedCache cache) {
   return cache.remove(cacheKey);
  }
 }).or(Boolean.FALSE);
 if (lruCache.getIfPresent(cacheKey.key()) != null) {
  lruCache.invalidate(cacheKey.key());
  result = true;
 }
 return result;
}

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

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

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

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

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

@Override public boolean remove(@Nonnull final CacheKey cacheKey) {
 checkNotNull(cacheKey, "cacheKey == null");
 boolean result = nextCache().map(new Function<NormalizedCache, Boolean>() {
  @Nonnull @Override public Boolean apply(@Nonnull NormalizedCache cache) {
   return cache.remove(cacheKey);
  }
 }).or(Boolean.FALSE);
 if (lruCache.getIfPresent(cacheKey.key()) != null) {
  lruCache.invalidate(cacheKey.key());
  result = true;
 }
 return result;
}

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