Khaaz / SP_DI-poc

SP_DI-poc

API

The InjectorContainer class is responsible for handling the injection process, and holding all instances.

parseStatic

Parse all files in a package and register them in the DI container.

public void parseStatic(String packageName)

register

Register a class in the DI container.

public void register(Class<?> c)

Register a class in the DI container mapped to an abstract class.

public void register(Class<?> abstractC, Class<?> concreteC)

get

Get an instance for a class in the DI container.

public <T> T get(Class<T> c)

@Inject

On a field or a constructor, mark this field/constructor to benefit from DI.

@Injectable

On a class, mark this class to benefit from DI, and be Injected in other classes.

Features

• Constructor injection with @Inject
• Field injection with @Inject
• Package scanning via parseStatic
• @Injectable to specify injectable Class, and class that will benefit from DI.
• Cyclic DI, so all classes get Injected until all classes are instantiated
• Error handling to automatically stop the DI process in case of missing constructor, instantiation error, non @Injectable injection

Tests

The src package acts as a default template app, easily customisable to test the DI container.

The test package tests various scenario:

• Static file parsing
• Constructor injection
• Field injection
• Class without default constructor
• Class with a non-injectable class