Package com.googlecode.objectify.impl.translate

Class ArrayTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.ArrayTranslatorFactory

All Implemented Interfaces:

TranslatorFactory<Object,Collection<Object>>

public class ArrayTranslatorFactory
extends Object
implements TranslatorFactory<Object,Collection<Object>>

Translator which can load an array of things.

Note that empty or null arrays are not stored in the datastore, and null values for the array 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 array contents.

The reason the generic P type of this factory is Object instead of Object[] is that Object[] is incompatible with the primitive arrays. This factory handles primitives as well.

Author:

Jeff Schnitzer

See Also:

CollectionTranslatorFactory

Constructor Summary

Constructors

Constructor	Description
ArrayTranslatorFactory()

Method Summary

Modifier and Type	Method	Description
Translator<Object,Collection<Object>>	create(TypeKey<Object> tk, CreateContext ctx, Path path)	Create a translator for a type.

Methods inherited from class java.lang.Object

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

Constructor Details

ArrayTranslatorFactory

public ArrayTranslatorFactory()

Method Details

create

public Translator<Object,Collection<Object>> create(TypeKey<Object> tk,
 CreateContext ctx,
 Path path)

Description copied from interface: TranslatorFactory

Create a translator for a type.

Specified by:

create in interface TranslatorFactory<Object,Collection<Object>>

Parameters:

tk - defines the type which is to be translated

path - is where this type was discovered, important for logging and exceptions

Returns:

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