com.mmnaseri.utils.spring.data.proxy.impl.adapters

Class OptionalResultAdapter

java.lang.Object

com.mmnaseri.utils.spring.data.proxy.impl.adapters.AbstractResultAdapter<E>

com.mmnaseri.utils.spring.data.proxy.impl.adapters.AbstractIterableResultAdapter<Object>

com.mmnaseri.utils.spring.data.proxy.impl.adapters.OptionalResultAdapter

All Implemented Interfaces:

ResultAdapter<Object>, Comparable<ResultAdapter>

public class OptionalResultAdapter
extends AbstractIterableResultAdapter<Object>

This adapter accepts all invocations wherein the original value is an Iterable object and the requested method type is an Optional value.

While adapting, the adapter will also check that the iterable yields only one item and that it is of the same type or of a child type of the type requested by the invoked method.

This adapter runs at the priority -400.

Since:

2.1.1 (10/29/2020)

Author:

Milad Naseri (m.m.naseri@gmail.com)

Constructor Summary

Constructors

Constructor and Description
OptionalResultAdapter()

Method Summary

Modifier and Type	Method and Description
boolean	accepts(Invocation invocation, Object originalValue) Called to determine whether or not this adapter can adapt the original value passed down from a data store operation to the type required by the repository method being invoked
protected Object	doAdapt(Invocation invocation, Iterable iterable) This is called when we want to adapt an iterable object to another type.

Methods inherited from class com.mmnaseri.utils.spring.data.proxy.impl.adapters.AbstractIterableResultAdapter

adapt

Methods inherited from class com.mmnaseri.utils.spring.data.proxy.impl.adapters.AbstractResultAdapter

compareTo, getPriority

Methods inherited from class java.lang.Object

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

Constructor Detail

OptionalResultAdapter

public OptionalResultAdapter()

Method Detail

accepts

public boolean accepts(Invocation invocation,
                       Object originalValue)

Description copied from interface: ResultAdapter

Called to determine whether or not this adapter can adapt the original value passed down from a data store operation to the type required by the repository method being invoked

Parameters:

invocation - the invocation

originalValue - the original value

Returns:

true if the adapter can convert the value

doAdapt

protected Object doAdapt(Invocation invocation,
                         Iterable iterable)

Description copied from class: AbstractIterableResultAdapter

This is called when we want to adapt an iterable object to another type.

Specified by:

doAdapt in class AbstractIterableResultAdapter<Object>

Parameters:

invocation - the invocation which called for this adaptation

iterable - the iterable to be adapted to the appropriate result type

Returns:

the adapted result