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kotlin-guice
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Guice DSL extensions for Kotlin
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kotlin-guice
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kotlin-guice ============ Guice extensions for Kotlin. This provides extension wrappers and extension methods for providing a better Guice DSL experience from Kotlin. It takes advantage of reified types to reduce class references like `bind(MyResource::class.java)` to `bind<MyResource>()`. ## Download Download the latest JAR via Maven: ```xml <dependency> <groupId>dev.misfitlabs.kotlinguice4</groupId> <artifactId>kotlin-guice</artifactId> <version>3.0.0</version> </dependency> ``` or Gradle: ```gradle compile 'dev.misfitlabs.kotlinguice4:kotlin-guice:3.0.0' ``` ## Getting Started ### KotlinModule Use `KotlinModule` for Guice modules instead of `AbstractModule` to take advantage of the enhanced Kotlin Guice DSL. ```kotlin import dev.misfitlabs.kotlinguice4.KotlinModule class MyModule : KotlinModule() { override fun configure() { bind<Service>().to<ServiceImpl>().`in`<Singleton>() bind<PaymentService<CreditCard>>().to<CreditCardPaymentService>() bind<CreditCardProcessor>().annotatedWith<PayPal>().to<PayPalCreditCardProcessor>() } } ``` The `KotlinPrivateModule` can also be used if only some bindings need to be exposed. ```kotlin import dev.misfitlabs.kotlinguice4.KotlinPrivateModule class MyPrivateModule : KotlinPrivateModule() { override fun configure() { bind<Service>().to<ServiceImpl>().`in`<Singleton>() bind<PaymentService<CreditCard>>().to<CreditCardPaymentService>() bind<CreditCardProcessor>().annotatedWith<PayPal>().to<PayPalCreditCardProcessor>() expose<PaymentService<CreditCard>>() } } ``` ### Injector The Guice injector has been enhanced with extension methods to make direct use of the injector better from Kotlin. ```kotlin import dev.misfitlabs.kotlinguice4.annotatedKey import dev.misfitlabs.kotlinguice4.getInstance fun main(args: Array<String>) { val injector = Guice.createInjector(MyModule(), MyPrivateModule()) val paymentService = injector.getInstance<PaymentService<CreditCard>>() // Use the annotatedKey to get an annotated instance val payPalProcessor = injector.getInstance(annotatedKey<CreditCardProcessor, PayPayl>()) } ``` ### Key and TypeLiteral Package level functions are included to enhance creating `Key` and `TypeLiteral` instances from kotlin. ```kotlin import dev.misfitlabs.kotlinguice4.annotatedKey import dev.misfitlabs.kotlinguice4.key import dev.misfitlabs.kotlinguice4.typeLiteral val key = key<String>() val annotatedKey = annotatedKey<String, SomeAnnotation>() val sameAnnotatedDifferentKey = annotatedKey.getType<Long>() val listType = typeLiteral<PaymentService<CreditCrd>>() ``` ### Multibindings As of version 1.4.1 the kotlin-guice-multibindings module is gone and the functionality has been merged into kotlin-guice. #### Usage ```kotlin val multibinder = KotlinMultibinder.newSetBinder<Snack>(kotlinBinder) multibinder.addBinding().to<Twix>() val mapbinder = KotlinMapBinder.newMapBinder<String, Snack>(kotlinBinder) mapbinder.addBinding("twix").to<Twix>() ``` With Guice 4.2+, scanning for methods with the multibinding annotations `ProvidesIntoSet`, `ProvidesIntoMap`, and `ProvidesIntoOptional` is enabled by default. However, the default scanner only provides bindings for Java collection types. In order to get bindings for Kotlin collection types, install the `KotlinMultibindingsScanner`. ```kotlin install(KotlinMultibindingsScanner.asModule()) ``` ## License Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
