com.googlecode.objectify.impl

Class QueryEngine

java.lang.Object

com.googlecode.objectify.impl.QueryEngine

public class QueryEngine
extends Object

Logic for dealing with queries.

Author:

Jeff Schnitzer

Constructor Summary

Constructors

Constructor and Description
QueryEngine()

Method Summary

Modifier and Type	Method and 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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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.