com.googlecode.objectify.impl.translate

Class CollectionTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.CollectionTranslatorFactory

All Implemented Interfaces:

TranslatorFactory<Collection<Object>>

public class CollectionTranslatorFactory
extends Object
implements TranslatorFactory<Collection<Object>>

Translator which can load things into a collection field. Might be embedded items, might not.

Note that empty or null collections are not stored in the datastore, and null values for the collection field are ignored when they are loaded from the Entity. This is because the datastore doesn't store empty collections, and storing null fields will confuse filtering for actual nulls in the collection contents.

Author:

Jeff Schnitzer

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CollectionTranslatorFactory.CollectionListNodeTranslator

Constructor Summary

Constructors

Constructor and Description
CollectionTranslatorFactory()

Method Summary

Methods

Modifier and Type	Method and Description
Translator<Collection<Object>>	create(Path path, Property property, Type type, CreateContext ctx)

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionTranslatorFactory

public CollectionTranslatorFactory()

Method Detail

create

public Translator<Collection<Object>> create(Path path,
                                    Property property,
                                    Type type,
                                    CreateContext ctx)

Specified by:

create in interface TranslatorFactory<Collection<Object>>

Parameters:

path - current path to this part of the tree, important for logging and exceptions

property - is the property we are inspecting to create a translator for

type - is the generic type of the field (or field component). For example, examining a field of type List will have a Type of List; the TranslatorFactory which recognizes List may then ask for a translator of its component type String.

Returns:

null if this factory does not know how to deal with that situation.