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/*
 * Copyright (c) 2017, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.internal.inject;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.stream.Collectors;

import javax.ws.rs.core.GenericType;

import javax.inject.Provider;

import org.glassfish.jersey.internal.LocalizationMessages;

/**
 * Implementation of {@link Binder} interface dedicated to keep some level of code compatibility between previous HK2
 * implementation and new DI SPI.
 * 

* Currently, there are supported only bind method and more complicated method where HK2 interfaces are required were omitted. * * @author Petr Bouda */ public abstract class AbstractBinder implements Binder { private List internalBindings = new ArrayList<>(); private List installed = new ArrayList<>(); private InjectionManager injectionManager; private boolean configured = false; /** * Implement to provide binding definitions using the exposed binding methods. */ protected abstract void configure(); /** * Sets {@link InjectionManager} to be able to create instance providers using the injection manager. {@code InjectionManager} * should be called before the invocation of {@link #configure()}, otherwise immediate invocation {@link Provider#get()} * returns * * @param injectionManager injection manager to create a provider. */ void setInjectionManager(InjectionManager injectionManager) { this.injectionManager = injectionManager; } /** * Creates a new instance of {@link Provider} which is able to retrieve a managed instance registered in * {@link InjectionManager}. If {@code InjectionManager} is {@code null} at the time of calling {@link Provider#get()} then * {@link IllegalStateException} is thrown. * * @param clazz class of managed instance. * @param type of the managed instance returned using provider. * @return provider with instance of managed instance. */ protected final Provider createManagedInstanceProvider(Class clazz) { return () -> { if (injectionManager == null) { throw new IllegalStateException(LocalizationMessages.INJECTION_MANAGER_NOT_PROVIDED()); } return injectionManager.getInstance(clazz); }; } /** * Start building a new class-based service binding. *

* Does NOT bind the service type itself as a contract type. * * @param service type. * @param serviceType service class. * @return initialized binding builder. */ public ClassBinding bind(Class serviceType) { ClassBinding binding = Bindings.service(serviceType); internalBindings.add(binding); return binding; } /** * Binds the provided binding and return the same instance. * * @param binding binding. * @return the same provided binding. */ public Binding bind(Binding binding) { internalBindings.add(binding); return binding; } /** * Start building a new class-based service binding. *

* Binds the service type itself as a contract type. * * @param service type. * @param serviceType service class. * @return initialized binding builder. */ public ClassBinding bindAsContract(Class serviceType) { ClassBinding binding = Bindings.serviceAsContract(serviceType); internalBindings.add(binding); return binding; } /** * Start building a new generic type-based service binding. *

* Binds the generic service type itself as a contract type. * * @param service type. * @param serviceType generic service type information. * @return initialized binding builder. */ public ClassBinding bindAsContract(GenericType serviceType) { ClassBinding binding = Bindings.service(serviceType); internalBindings.add(binding); return binding; } /** * Start building a new generic type-based service binding. *

* Binds the generic service type itself as a contract type. * * @param serviceType generic service type information. * @return initialized binding builder. */ public ClassBinding bindAsContract(Type serviceType) { ClassBinding binding = Bindings.serviceAsContract(serviceType); internalBindings.add(binding); return binding; } /** * Start building a new instance-based service binding. The binding is naturally * considered to be a {@link javax.inject.Singleton singleton-scoped}. *

* Does NOT bind the service type itself as a contract type. * * @param service type. * @param service service instance. * @return initialized binding builder. */ public InstanceBinding bind(T service) { InstanceBinding binding = Bindings.service(service); internalBindings.add(binding); return binding; } /** * Start building a new supplier class-based service binding. * * @param service type. * @param supplierType service supplier class. * @param supplierScope factory scope. * @return initialized binding builder. */ public SupplierClassBinding bindFactory( Class> supplierType, Class supplierScope) { SupplierClassBinding binding = Bindings.supplier(supplierType, supplierScope); internalBindings.add(binding); return binding; } /** * Start building a new supplier class-based service binding. *

* The supplier itself is bound in a per-lookup scope. * * @param service type. * @param supplierType service supplier class. * @return initialized binding builder. */ public SupplierClassBinding bindFactory(Class> supplierType) { SupplierClassBinding binding = Bindings.supplier(supplierType); internalBindings.add(binding); return binding; } /** * Start building a new supplier instance-based service binding. * * @param service type. * @param factory service instance. * @return initialized binding builder. */ public SupplierInstanceBinding bindFactory(Supplier factory) { SupplierInstanceBinding binding = Bindings.supplier(factory); internalBindings.add(binding); return binding; } /** * Start building a new injection resolver binding. The injection resolver is naturally * considered to be a {@link javax.inject.Singleton singleton-scoped}. *

* There is no need to provide any additional information. Other method on {@link Binding} * will be ignored. * * @param type of the injection resolver. * @param resolver injection resolver instance. * @return initialized binding builder. */ public InjectionResolverBinding bind(T resolver) { InjectionResolverBinding binding = Bindings.injectionResolver(resolver); internalBindings.add(binding); return binding; } /** * Adds all binding definitions from the binders to the binding configuration. * * @param binders binders whose binding definitions should be configured. */ public final void install(AbstractBinder... binders) { Arrays.stream(binders) .filter(Objects::nonNull) .forEach(installed::add); } @Override public Collection getBindings() { invokeConfigure(); List bindings = installed.stream() .flatMap(binder -> Bindings.getBindings(injectionManager, binder).stream()) .collect(Collectors.toList()); bindings.addAll(internalBindings); return bindings; } private void invokeConfigure() { if (!configured) { configure(); configured = true; } } }