Package com.googlecode.objectify.impl.translate

Interface Populator<P>

All Known Implementing Classes:
ClassPopulator, KeyPopulator, NullPopulator, PropertyPopulator
public interface Populator<P>

A populator knows how to copy properties between POJO objects and the native datastore representation. Unlike a translator, it doesn't create the POJO or container.

P is the pojo type.

Author:
Jeff Schnitzer invalid input: '<'[email protected]>

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    load(com.google.cloud.datastore.FullEntity<?> node, LoadContext ctx, Path path, P into)
    Loads the content of the specified datastore node into an existing POJO.
    void
    save(P pojo, boolean index, SaveContext ctx, Path path, com.google.cloud.datastore.FullEntity.Builder<?> into)
    Saves data from the POJO into the entity builder.

  • Method Details

    • load

      void load(com.google.cloud.datastore.FullEntity<?> node, LoadContext ctx, Path path, P into)

      Loads the content of the specified datastore node into an existing POJO.

      Parameters:
      node - is the part of the native datastore entity tree we are transforming.
      ctx - holds state information during an entity load.
      path - is the current path to this POJO

    • save

      void save(P pojo, boolean index, SaveContext ctx, Path path, com.google.cloud.datastore.FullEntity.Builder<?> into)
      Saves data from the POJO into the entity builder.
      Parameters:
      pojo - is an object from the pojo entity graph; possibly the whole graph or possibly just a leaf field.
      index - is whether the instruction so far is to index or not index property values
      path - is the path that we have taken to get here, which could be long due to re-entrant translators (ie, an embedded pojo that also has a reference to the same class).