com.googlecode.objectify.impl.translate

Class MapTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.MapTranslatorFactory

All Implemented Interfaces:

TranslatorFactory<java.util.Map<java.lang.String,java.lang.Object>>

public class MapTranslatorFactory
extends java.lang.Object
implements TranslatorFactory<java.util.Map<java.lang.String,java.lang.Object>>

Translator which manages an expando-style Map. The key must be String, which becomes a normal path element in the entity. The value can be anything that goes into a Collection; a basic type, an embedded type, a reference, a null, etc. Pretty much the same attribute rules apply as apply to Collections.

Map keys cannot contain '.' and cannot be null.

However, Maps are not list structures, so you don't have the same restriction on embedding; you can put maps inside of maps and lists inside of maps.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapTranslatorFactory.MapMapNodeTranslator

Constructor Summary

Constructors

Constructor and Description
MapTranslatorFactory()

Method Summary

Methods

Modifier and Type	Method and Description
Translator<java.util.Map<java.lang.String,java.lang.Object>>	create(Path path, Property property, java.lang.reflect.Type type, CreateContext ctx)

Methods inherited from class java.lang.Object

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

Constructor Detail

MapTranslatorFactory

public MapTranslatorFactory()

Method Detail

create

public Translator<java.util.Map<java.lang.String,java.lang.Object>> create(Path path,
                                                                  Property property,
                                                                  java.lang.reflect.Type type,
                                                                  CreateContext ctx)

Specified by:

create in interface TranslatorFactory<java.util.Map<java.lang.String,java.lang.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.