Package com.googlecode.objectify.impl

Class QueryEngine

  • public class QueryEngine
extends Object
    Logic for dealing with queries.
    Author:
    Jeff Schnitzer

    • Constructor Summary

      Constructors 
      Constructor Description
      QueryEngine()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int queryCount​(com.google.cloud.datastore.KeyQuery query)
      The fundamental query count operation.
      <T> com.google.cloud.datastore.QueryResults<T> queryHybrid​(com.google.cloud.datastore.KeyQuery query, int chunkSize)
      Perform a keys-only plus batch gets.
      <T> com.google.cloud.datastore.QueryResults<Key<T>> queryKeysOnly​(com.google.cloud.datastore.KeyQuery query)
      Perform a keys-only query.
      <T> com.google.cloud.datastore.QueryResults<T> queryNormal​(com.google.cloud.datastore.EntityQuery query, int chunkSize)
      A normal, non-hybrid query
      <T> com.google.cloud.datastore.QueryResults<T> queryProjection​(com.google.cloud.datastore.ProjectionEntityQuery query)
      A projection query.

    • Constructor Detail

      • QueryEngine

        public QueryEngine()

    • Method Detail

      • queryKeysOnly

        public <T> com.google.cloud.datastore.QueryResults<Key<T>> queryKeysOnly​(com.google.cloud.datastore.KeyQuery query)
        Perform a keys-only query.

      • queryHybrid

        public <T> com.google.cloud.datastore.QueryResults<T> queryHybrid​(com.google.cloud.datastore.KeyQuery query,
                                                                  int chunkSize)
        Perform a keys-only plus batch gets.

      • queryNormal

        public <T> com.google.cloud.datastore.QueryResults<T> queryNormal​(com.google.cloud.datastore.EntityQuery query,
                                                                  int chunkSize)
        A normal, non-hybrid query

      • queryProjection

        public <T> com.google.cloud.datastore.QueryResults<T> queryProjection​(com.google.cloud.datastore.ProjectionEntityQuery query)
        A projection query. Bypasses the session entirely.

      • queryCount

        public int queryCount​(com.google.cloud.datastore.KeyQuery query)
        The fundamental query count operation. This doesn't appear to be implemented in the new SDK, so we simulate with a keys-only query.