Class InjectUtil

java.lang.Object

eu.cloudnetservice.driver.inject.InjectUtil

@Internal
public final class InjectUtil
extends Object

Some general utility that comes handy for some internal tasks.

Since:

4.0

Field Summary

Fields

Modifier and Type	Field	Description
private static final BindingKey<?>[]	EMPTY_ELEMENT_ARRAY
private static final Object[]	EMPTY_INSTANCE_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	InjectUtil()

Method Summary

Modifier and Type	Method	Description
static @NonNull BindingKey<?>[]	buildElementsForParameters(@NonNull Parameter[] parameters)	Builds an element from the generic type and annotations of each given parameter.
static @NonNull BindingKey<?>[]	buildElementsForParameters(@NonNull Parameter[] parameters, int offset)	Builds an element from the generic type and annotations of each given parameter.
static @NonNull Object[]	findAllInstances(@NonNull InjectionLayer<?> layer, @NonNull BindingKey<?>[] keys)	Finds all instances that are requested by the given element array in the given injection layer.
static @NonNull Object[]	findAllInstances(@NonNull InjectionLayer<?> layer, @NonNull BindingKey<?>[] keys, int offset)	Finds all instances that are requested by the given element array in the given injection layer.

Methods inherited from class Object

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

Field Details

EMPTY_INSTANCE_ARRAY

private static final Object[] EMPTY_INSTANCE_ARRAY

EMPTY_ELEMENT_ARRAY

private static final BindingKey<?>[] EMPTY_ELEMENT_ARRAY

Constructor Details

InjectUtil

private InjectUtil()

Method Details

buildElementsForParameters

@NonNull
public static @NonNull BindingKey<?>[] buildElementsForParameters(@NonNull
 @NonNull Parameter[] parameters)

Builds an element from the generic type and annotations of each given parameter.

Parameters:

parameters - the parameters to build the element for.

Returns:

an array of element each representing a given parameter, in order.

Throws:

NullPointerException - if the given parameter array is null.

buildElementsForParameters

@NonNull
public static @NonNull BindingKey<?>[] buildElementsForParameters(@NonNull
 @NonNull Parameter[] parameters,
 int offset)

Builds an element from the generic type and annotations of each given parameter.

Parameters:

parameters - the parameters to build the element for.

offset - the offset to begin construction from.

Returns:

an array of element each representing a given parameter, in order.

Throws:

NullPointerException - if the given parameter array is null.

findAllInstances

@NonNull
public static @NonNull Object[] findAllInstances(@NonNull
 @NonNull InjectionLayer<?> layer,
 @NonNull
 @NonNull BindingKey<?>[] keys)

Finds all instances that are requested by the given element array in the given injection layer.

Parameters:

layer - the layer to retrieve the needed instances from.

keys - the keys to get the instances of.

Returns:

the instances represented by the given elements, in order.

Throws:

NullPointerException - if the given injection layer or elements array is null.

findAllInstances

@NonNull
public static @NonNull Object[] findAllInstances(@NonNull
 @NonNull InjectionLayer<?> layer,
 @NonNull
 @NonNull BindingKey<?>[] keys,
 int offset)

Finds all instances that are requested by the given element array in the given injection layer.

Parameters:

layer - the layer to retrieve the needed instances from.

keys - the keys to get the instances of.

offset - the offset to start writing the elements from in the resulting array, must be bigger than zero.

Returns:

the instances represented by the given elements, in order.

Throws:

NullPointerException - if the given injection layer or elements array is null.

IllegalArgumentException - if the given offset is smaller than zero.