本文整理了Java中com.googlecode.objectify.Key.getParent()方法的一些代码示例，展示了Key.getParent()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。Key.getParent()方法的具体详情如下：
包路径：com.googlecode.objectify.Key
类名称：Key
方法名：getParent

Key.getParent介绍

暂无

代码示例

代码示例来源：origin: objectify/objectify

/**
 * Gets the root of a parent graph of keys.  If a Key has no parent, it is the root.
 *
 * @return the topmost parent key, or this object itself if it is the root.
 * Note that the root key could potentially have any type.
 */
@SuppressWarnings("unchecked")
public <V> Key<V> getRoot() {
  if (this.getParent() == null)
    return (Key<V>)this;
  else
    return this.getParent().getRoot();
}

代码示例来源：origin: objectify/objectify

/**
 * Gets the result, possibly from the session, putting it in the session if necessary.
 * Also will recursively prepare the session with @Load parents as appropriate.
 * @throws NullPointerException if key is null
 */
public <T> Result<T> load(final Key<T> key) {
  if (key == null)
    throw new NullPointerException("You tried to load a null key!");
  final Result<T> result = round.get(key);
  // If we are running a transaction, enlist the result so that it gets processed on commit even
  // if the client never materializes the result.
  if (ofy.getTransaction() != null)
    ((PrivateAsyncTransaction)ofy.getTransaction()).enlist(result);
  // Now check to see if we need to recurse and add our parent(s) to the round
  if (key.getParent() != null) {
    final KeyMetadata<?> meta = ofy.factory().keys().getMetadata(key);
    // Is it really possible for this to be null?
    if (meta != null) {
      if (meta.shouldLoadParent(loadArrangement)) {
        load(key.getParent());
      }
    }
  }
  return result;
}

代码示例来源：origin: com.googlecode.cedar-common/objectify

/**
 * Gets the root of a parent graph of keys.  If a Key has no parent, it is the root.
 *  
 * @return the topmost parent key, or this object itself if it is the root.
 * Note that the root key could potentially have any type. 
 */
@SuppressWarnings("unchecked")
public <V> Key<V> getRoot()
{
  if (this.getParent() == null)
    return (Key<V>)this;
  else
    return this.getParent().getRoot();
}

代码示例来源：origin: com.googlecode.cedar-common/objectify

@Override
public <V> Set<Key<V>> fetchParentKeys()
{
  Set<Key<V>> parentKeys = new LinkedHashSet<Key<V>>();
  
  for (Key<T> key: this.fetchKeys())
  {
    if (key.getParent() == null)
      throw new IllegalStateException("Tried to fetch parent from a key that has no parent: " + key);
    
    parentKeys.add(key.<V>getParent());
  }
  
  return parentKeys;
}

代码示例来源：origin: instacount/appengine-counter

@Test
public void getterTest() throws Exception
{
  final Key<CounterData> counterDataKey = CounterData.key(TEST_COUNTER1);
  final Key<CounterShardData> counterShardDataKey = CounterShardData.key(counterDataKey, 0);
  final UUID uuid = UUID.randomUUID();
  final CounterShardOperationData counterShardOperationData = new CounterShardOperationData(counterShardDataKey,
    uuid, CounterOperationType.INCREMENT, 1L);
  assertThat(counterShardOperationData.getMutationAmount(), is(1L));
  assertThat(counterShardOperationData.getCounterShardDataKey(), is(counterShardDataKey));
  assertThat(counterShardOperationData.getId(), is(uuid.toString()));
  assertThat(
    counterShardOperationData.getCreationDateTime().isBefore(DateTime.now(DateTimeZone.UTC).plusSeconds(10)),
    is(true));
  // TypedKey
  assertThat(counterShardOperationData.getTypedKey().getName(), is(uuid.toString()));
  assertThat(counterShardOperationData.getTypedKey().getParent().getName(), is(counterShardDataKey.getName()));
  // RawKey
  assertThat(counterShardOperationData.getKey().getName(), is(uuid.toString()));
}