Package de.simonkerstan.ee.core.di.graph

Class DependencyGraph

java.lang.Object

de.simonkerstan.ee.core.di.graph.DependencyGraph

public final class DependencyGraph
extends Object

Graph with all beans and their dependencies.

Constructor Summary

Constructors

Constructor	Description
DependencyGraph()

Method Summary

Modifier and Type	Method	Description
void	addBean(int priority, Class<?> type, BeanCreationInformation beanCreationInformation)	Add a bean to the graph.
void	addDefaultConstructorClass(Class<?> clazz, Class<?>[] interfaces)	Add a class with a default constructor to the list of classes with a default constructor.
boolean	hasUnresolvedDependencies()	Test whether the graph has unresolved dependencies.
Map<Class<?>,Object>	instantiateBeans()	Instantiate all beans in the graph.

Methods inherited from class java.lang.Object

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

Constructor Details

DependencyGraph

public DependencyGraph()

Method Details

addBean

public void addBean(int priority,
 Class<?> type,
 BeanCreationInformation beanCreationInformation)

Add a bean to the graph. The graph will automatically resolve all possible types that could be provided by the bean.

Parameters:

priority - Priority of the bean

type - Type of the bean

beanCreationInformation - Bean information

addDefaultConstructorClass

public void addDefaultConstructorClass(Class<?> clazz,
 Class<?>[] interfaces)

Add a class with a default constructor to the list of classes with a default constructor.

Parameters:

clazz - Class with a default constructor

interfaces - Directly implemented interfaces of the given class

hasUnresolvedDependencies

public boolean hasUnresolvedDependencies()

Test whether the graph has unresolved dependencies.

Returns:

true if there are unresolved dependencies, false otherwise.

instantiateBeans

public Map<Class<?>,Object> instantiateBeans()
                                      throws BeanInstantiationException

Instantiate all beans in the graph.

Returns:

Map of instantiated beans

Throws:

BeanInstantiationException - If instantiation fails for one of the beans or dependencies are unresolvable