org.everrest.core

Class BaseDependencySupplier

java.lang.Object

org.everrest.core.BaseDependencySupplier

All Implemented Interfaces:

DependencySupplier

Direct Known Subclasses:

DependencySupplierImpl, ServletContextDependencySupplier

public abstract class BaseDependencySupplier
extends Object
implements DependencySupplier

Version:

$Id$

Author:

Andrey Parfonov

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<? extends Annotation>	injectAnnotationClass
protected DependencyNameDetector	nameDetector

Constructor Summary

Constructors

Constructor and Description
BaseDependencySupplier()
BaseDependencySupplier(Class<? extends Annotation> injectAnnotationClass)
BaseDependencySupplier(Class<? extends Annotation> injectAnnotationClass, DependencyNameDetector nameDetector)

Method Summary

Modifier and Type	Method and Description
Object	getComponent(Parameter parameter) Get object that is approach do description parameter.
Object	getComponentByName(String name) Get instance of dependency by name.
javax.inject.Provider<?>	getProvider(Type providerType) Get Provider of type providerType.
protected boolean	isProvider(Class<?> clazz) Check is clazz is javax.inject.Provider (not subclass of it).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.everrest.core.DependencySupplier

getComponent

Field Detail

injectAnnotationClass

protected final Class<? extends Annotation> injectAnnotationClass

nameDetector

protected final DependencyNameDetector nameDetector

Constructor Detail

BaseDependencySupplier

public BaseDependencySupplier(Class<? extends Annotation> injectAnnotationClass,
                              DependencyNameDetector nameDetector)

BaseDependencySupplier

public BaseDependencySupplier(Class<? extends Annotation> injectAnnotationClass)

BaseDependencySupplier

public BaseDependencySupplier()

Method Detail

getComponent

public final Object getComponent(Parameter parameter)

Description copied from interface: DependencySupplier

Get object that is approach do description parameter.

Specified by:

getComponent in interface DependencySupplier

Parameters:

parameter - required parameter description

Returns:

object of required type or null if instance described by parameter may not be produced

See Also:

Parameter.getParameterClass(), Parameter.getGenericType()

getComponentByName

public Object getComponentByName(String name)

Get instance of dependency by name. This is optional capability so by default this method returns null. Override it if back-end (e.g. IoC container) supports getting components by key (name).

Parameters:

name - of dependency

Returns:

object of required type or null if instance described by name may not be produced

Throws:

RuntimeException - if any error occurs while creating instance of name

isProvider

protected final boolean isProvider(Class<?> clazz)

Check is clazz is javax.inject.Provider (not subclass of it).

Parameters:

clazz - class to be checked

Returns:

true if clazz is javax.inject.Provider and false otherwise

getProvider

public javax.inject.Provider<?> getProvider(Type providerType)

Get Provider of type providerType.

Parameters:

providerType - parameterized javax.inject.Provider type

Returns:

Provider the instance of javax.inject.Provider for specified providerType