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BeanDefinition.kt
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BeanDefinition.kt
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/*
* Copyright 2017-2018 the original author or authors.
*
* 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.
*/
package org.koin.core.definition
import org.koin.core.instance.*
import org.koin.core.parameter.DefinitionParameters
import org.koin.core.qualifier.Qualifier
import org.koin.core.scope.Scope
import org.koin.ext.getFullName
import kotlin.reflect.KClass
/**
* Koin bean definition
* main structure to make definition in Koin
*
* @param qualifier
* @param primaryType
*
* @author Arnaud Giuliani
*/
class BeanDefinition<T>(
val qualifier: Qualifier? = null,
val scopeName: Qualifier? = null,
val primaryType: KClass<*>
) {
// Main data
var secondaryTypes = arrayListOf<KClass<*>>()
var instance: DefinitionInstance<T>? = null
lateinit var definition: Definition<T>
var options = Options()
var properties = Properties()
lateinit var kind: Kind
// lifecycle
var onRelease: OnReleaseCallback<T>? = null
var onClose: OnCloseCallback<T>? = null
/**
*
*/
fun hasScopeSet() = scopeName != null
/**
* Create the associated Instance Holder
*/
fun createInstanceHolder() {
this.instance = when (kind) {
Kind.Single -> SingleDefinitionInstance(this)
Kind.Factory -> FactoryDefinitionInstance(this)
Kind.Scoped -> ScopeDefinitionInstance(this)
}
}
/**
* Resolve instance
*/
fun <T> resolveInstance(context: InstanceContext) = instance?.get<T>(context)
?: error("Definition without any InstanceContext - $this")
override fun toString(): String {
val defKind = kind.toString()
val defName = qualifier?.let { "name:'$qualifier', " } ?: ""
val defScope = scopeName?.let { "scope:'$scopeName', " } ?: ""
val defType = "primary_type:'${primaryType.getFullName()}'"
val defOtherTypes = if (secondaryTypes.isNotEmpty()) {
val typesAsString = secondaryTypes.joinToString(",") { it.getFullName() }
", secondary_type:$typesAsString"
} else ""
return "[type:$defKind,$defScope$defName$defType$defOtherTypes]"
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (javaClass != other?.javaClass) return false
other as BeanDefinition<*>
if (qualifier != other.qualifier) return false
if (primaryType != other.primaryType) return false
return true
}
override fun hashCode(): Int {
var result = qualifier?.hashCode() ?: 0
result = 31 * result + primaryType.hashCode()
return result
}
fun close() {
instance?.close()
instance = null
}
}
enum class Kind {
Single, Factory, Scoped
}
typealias Definition<T> = Scope.(DefinitionParameters) -> T
typealias OnReleaseCallback<T> = (T?) -> Unit
typealias OnCloseCallback<T> = (T?) -> Unit