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

Field Summary

Fields

Modifier and Type	Field and Description
protected com.google.appengine.api.datastore.AsyncDatastoreService	ads
protected LoaderImpl<?>	loader
protected com.google.appengine.api.datastore.Transaction	transactionRaw

Constructor Summary

Constructors

Constructor and Description
QueryEngine(LoaderImpl<?> loader, com.google.appengine.api.datastore.AsyncDatastoreService ads, com.google.appengine.api.datastore.Transaction transactionRaw)

Method Summary

Methods

Modifier and Type	Method and Description
int	queryCount(com.google.appengine.api.datastore.Query query, com.google.appengine.api.datastore.FetchOptions fetchOpts) The fundamental query count operation.
<T> com.google.appengine.api.datastore.QueryResultIterable<T>	queryHybrid(com.google.appengine.api.datastore.Query query, com.google.appengine.api.datastore.FetchOptions fetchOpts) Perform a keys-only plus batch gets.
<T> com.google.appengine.api.datastore.QueryResultIterable<Key<T>>	queryKeysOnly(com.google.appengine.api.datastore.Query query, com.google.appengine.api.datastore.FetchOptions fetchOpts) Perform a keys-only query.
<T> com.google.appengine.api.datastore.QueryResultIterable<T>	queryNormal(com.google.appengine.api.datastore.Query query, com.google.appengine.api.datastore.FetchOptions fetchOpts) A normal, non-hybrid query

Methods inherited from class java.lang.Object

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

Field Detail

loader

protected LoaderImpl<?> loader

ads

protected com.google.appengine.api.datastore.AsyncDatastoreService ads

transactionRaw

protected com.google.appengine.api.datastore.Transaction transactionRaw

Constructor Detail

QueryEngine

public QueryEngine(LoaderImpl<?> loader,
           com.google.appengine.api.datastore.AsyncDatastoreService ads,
           com.google.appengine.api.datastore.Transaction transactionRaw)

Method Detail

queryKeysOnly

public <T> com.google.appengine.api.datastore.QueryResultIterable<Key<T>> queryKeysOnly(com.google.appengine.api.datastore.Query query,
                                                                               com.google.appengine.api.datastore.FetchOptions fetchOpts)

Perform a keys-only query.

queryHybrid

public <T> com.google.appengine.api.datastore.QueryResultIterable<T> queryHybrid(com.google.appengine.api.datastore.Query query,
                                                                        com.google.appengine.api.datastore.FetchOptions fetchOpts)

Perform a keys-only plus batch gets.

queryNormal

public <T> com.google.appengine.api.datastore.QueryResultIterable<T> queryNormal(com.google.appengine.api.datastore.Query query,
                                                                        com.google.appengine.api.datastore.FetchOptions fetchOpts)

A normal, non-hybrid query

queryCount

public int queryCount(com.google.appengine.api.datastore.Query query,
             com.google.appengine.api.datastore.FetchOptions fetchOpts)

The fundamental query count operation. This is sufficiently different from normal query().