Package oracle.dbtools.plugin.api.di

Class Instances

java.lang.Object

oracle.dbtools.plugin.api.di.Instances

All Implemented Interfaces:

InstanceLocator

public class Instances
extends java.lang.Object
implements InstanceLocator

Locates concrete instances of types

Since:

19.3.0

Author:

cdivilly

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Instances.Builder	Build Instances instances
static class	Instances.QualifiedInstance<T>	Represents an individual instance of a qualified service

Field Summary

Fields inherited from interface oracle.dbtools.plugin.api.di.InstanceLocator

INSTANCE_LOCATOR_ATTRIBUTE, INSTANTIATOR_TYPE_SUFFIX

Method Summary

Modifier and Type	Method	Description
static Instances.Builder	builder()	Produce a new Instances.Builder instance
java.util.Set<java.util.Map.Entry<TypeQualifier<?>,InstanceProvider<?>>>	entries()	Enumerate each of the instances in this set
boolean	isEmpty()	Indicate if this set of instances is empty
Instances.Builder	modify()	Produce a Instances.Builder instance initialized with the state of this instance
<T> java.util.List<Instances.QualifiedInstance<T>>	qualifiedInstances(java.lang.Class<T> type)	Provide Instances.QualifiedInstance for each instance of the specified type
<T> InstanceProvider<T>	select(TypeQualifier<T> service)	Select all services matching the specified TypeQualifier
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.dbtools.plugin.api.di.InstanceLocator

select, select

Method Detail

entries

public java.util.Set<java.util.Map.Entry<TypeQualifier<?>,InstanceProvider<?>>> entries()

Enumerate each of the instances in this set

Returns:

Set of Map.Entry elements, whose key is a TypeQualifier and it's value is an InstanceProvider

isEmpty

public boolean isEmpty()

Indicate if this set of instances is empty

Returns:

true if there are no instances in this set, false otherwise

modify

public Instances.Builder modify()

Produce a Instances.Builder instance initialized with the state of this instance

Returns:

Instances.Builder instance

qualifiedInstances

public <T> java.util.List<Instances.QualifiedInstance<T>> qualifiedInstances(java.lang.Class<T> type)

Provide Instances.QualifiedInstance for each instance of the specified type

Type Parameters:

T - The type of the instances to retrieve

Parameters:

type - the type of the instances to retrieve

Returns:

List of Instances.QualifiedInstance matches

select

public <T> InstanceProvider<T> select(TypeQualifier<T> service)

Description copied from interface: InstanceLocator

Select all services matching the specified TypeQualifier

Specified by:

select in interface InstanceLocator

Type Parameters:

T - The type of the service to locate

Parameters:

service - The qualifier that constrains which implementation to match

Returns:

InstanceProvider for the specified type and qualifier. This value is never null.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

builder

public static Instances.Builder builder()

Produce a new Instances.Builder instance

Returns:

Instances.Builder instance