org.simpleds.converter
Class AbstractCollectionConverter<C extends java.util.Collection>

java.lang.Object
  org.simpleds.converter.AbstractCollectionConverter<C>

Type Parameters:

C -

All Implemented Interfaces:

CollectionConverter<C>, Converter<C,C>

Direct Known Subclasses:

ListConverter, SetConverter, SortedSetConverter

public abstract class AbstractCollectionConverter<C extends java.util.Collection>
extends java.lang.Object
implements CollectionConverter<C>

Collection converter

Constructor Summary

protected

AbstractCollectionConverter(java.lang.Class<C> collectionType)

Method Summary

C	datastoreToJava(C dsValue) Convert a value from Google representation to a Java value
java.lang.Class<C>	getDatastoreType()
Converter	getItemConverter()
java.lang.Class<?>	getItemType()
java.lang.Class<C>	getJavaType()
C	getNullValue() Return the value to use for null values.
java.lang.Object	itemDatastoreToJava(java.lang.Object value) Convert one collection item from Google representation to a Java value
java.lang.Object	itemJavaToDatastore(java.lang.Object value) Convert one collection item from Java representation to a Datastore value
C	javaToDatastore(C javaValue) Convert a value from Java representation to a Datastore value
void	setItemConverter(Converter itemConverter)
void	setItemType(java.lang.Class<?> itemType)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.simpleds.converter.CollectionConverter

createCollection

Constructor Detail

AbstractCollectionConverter

protected AbstractCollectionConverter(java.lang.Class<C> collectionType)

Method Detail

datastoreToJava

public C datastoreToJava(C dsValue)

Description copied from interface: Converter

Convert a value from Google representation to a Java value

Specified by:

datastoreToJava in interface Converter<C extends java.util.Collection,C extends java.util.Collection>

Parameters:

dsValue - the value persistent in the google datastore

getNullValue

public C getNullValue()

Description copied from interface: Converter

Return the value to use for null values. This method will usually return null, except for embedded primitive values (int, long, etc) that will return zero instead.

Specified by:

getNullValue in interface Converter<C extends java.util.Collection,C extends java.util.Collection>

Returns:

The value to use in Java in case the datastore value is null.

javaToDatastore

public C javaToDatastore(C javaValue)

Description copied from interface: Converter

Convert a value from Java representation to a Datastore value

Specified by:

javaToDatastore in interface Converter<C extends java.util.Collection,C extends java.util.Collection>

Parameters:

javaValue - the Java property value

itemDatastoreToJava

public java.lang.Object itemDatastoreToJava(java.lang.Object value)

Description copied from interface: CollectionConverter

Convert one collection item from Google representation to a Java value

Specified by:

itemDatastoreToJava in interface CollectionConverter<C extends java.util.Collection>

Parameters:

value - the value persistent in the google datastore

itemJavaToDatastore

public java.lang.Object itemJavaToDatastore(java.lang.Object value)

Description copied from interface: CollectionConverter

Convert one collection item from Java representation to a Datastore value

Specified by:

itemJavaToDatastore in interface CollectionConverter<C extends java.util.Collection>

Parameters:

value - the Java property value

getItemType

public java.lang.Class<?> getItemType()

Specified by:

getItemType in interface CollectionConverter<C extends java.util.Collection>

Returns:

the expected type of the collection items

getItemConverter

public Converter getItemConverter()

setItemConverter

public void setItemConverter(Converter itemConverter)

setItemType

public void setItemType(java.lang.Class<?> itemType)

getJavaType

public java.lang.Class<C> getJavaType()

Specified by:

getJavaType in interface Converter<C extends java.util.Collection,C extends java.util.Collection>

Returns:

the java type handled by this converter

getDatastoreType

public java.lang.Class<C> getDatastoreType()

Specified by:

getDatastoreType in interface Converter<C extends java.util.Collection,C extends java.util.Collection>

Returns:

the datastore type handled by this converter