import com.google.protos.ipc.invalidation.AndroidService.AndroidTiclState; //导入依赖的package包/类
/**
 * Returns a {@link AndroidTiclStateWithDigest} containing {@code ticlState} and its computed
 * digest.
 */
private static AndroidTiclStateWithDigest createDigestedState(
    AndroidInvalidationClientImpl ticl) {
  Sha1DigestFunction digester = new Sha1DigestFunction();
  ApplicationClientIdP ticlAppId = ticl.getApplicationClientIdP();
  Metadata metaData = Metadata.newBuilder()
       .setClientConfig(ticl.getConfig())
       .setClientName(ticlAppId.getClientName())
       .setClientType(ticlAppId.getClientType())
       .setTiclId(ticl.getSchedulingId())
       .build();
  AndroidTiclState state = AndroidTiclState.newBuilder()
      .setMetadata(metaData)
      .setTiclState(ticl.marshal())
      .setVersion(ProtocolIntents.ANDROID_PROTOCOL_VERSION_VALUE).build();
  digester.update(state.toByteArray());
  AndroidTiclStateWithDigest verifiedState = AndroidTiclStateWithDigest.newBuilder()
      .setState(state)
      .setDigest(ByteString.copyFrom(digester.getDigest()))
      .build();
  return verifiedState;
}
 

import com.google.protos.ipc.invalidation.AndroidService.AndroidTiclState; //导入依赖的package包/类
/** Returns whether {@code field} is present in {@code message}. */
@Override
@SuppressWarnings("unchecked")
public boolean hasField(MessageLite rawMessage, Descriptor field) {
  Preconditions.checkNotNull(rawMessage);
  Preconditions.checkNotNull(field);
  AndroidTiclState message = (AndroidTiclState) rawMessage;
  if (field == VERSION) {
    return message.hasVersion();
  }
  if (field == TICL_STATE) {
    return message.hasTiclState();
  }
  if (field == METADATA) {
    return message.hasMetadata();
  }
  throw new IllegalArgumentException("Bad descriptor: " + field);
}
 

import com.google.protos.ipc.invalidation.AndroidService.AndroidTiclState; //导入依赖的package包/类
/** Returns the {@code field} from {@code message}. */
@Override
@SuppressWarnings("unchecked")
public Object getField(MessageLite rawMessage, Descriptor field) {
  Preconditions.checkNotNull(rawMessage);
  Preconditions.checkNotNull(field);
  AndroidTiclState message = (AndroidTiclState) rawMessage;
  if (field == VERSION) {
    return message.getVersion();
  }
  if (field == TICL_STATE) {
    return message.getTiclState();
  }
  if (field == METADATA) {
    return message.getMetadata();
  }
  throw new IllegalArgumentException("Bad descriptor: " + field);
}
 

import com.google.protos.ipc.invalidation.AndroidService.AndroidTiclState; //导入依赖的package包/类
/**
 * Creates an instance with state restored from {@code marshalledState}. Other parameters are as
 * in {@link InvalidationClientCore}.
 */
AndroidInvalidationClientImpl(Context context, SystemResources resources, Random random,
    AndroidTiclState marshalledState) {
  super(resources,
      random,
      marshalledState.getMetadata().getClientType(),
      marshalledState.getMetadata().getClientName().toByteArray(),
      marshalledState.getMetadata().getClientConfig(),
      getApplicationName(context),
      marshalledState.getTiclState(),
      new IntentForwardingListener(context, resources.getLogger()));
  this.schedulingId = marshalledState.getMetadata().getTiclId();
  initializeSchedulerWithRecurringTasks();
}
 

import com.google.protos.ipc.invalidation.AndroidService.AndroidTiclState; //导入依赖的package包/类
/**
 * Restores the Ticl from persistent storage if it exists. Otherwise, returns {@code null}.
 * @param context Android system context
 * @param resources resources to use for the Ticl
 */
static AndroidInvalidationClientImpl restoreTicl(Context context,
    SystemResources resources) {
  AndroidTiclState state = readTiclState(context, resources.getLogger());
  if (state == null) {
    return null;
  }
  AndroidInvalidationClientImpl ticl = new AndroidInvalidationClientImpl(context, resources,
      random, state);
  setSchedulerId(resources, ticl);
  return ticl;
}