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KODEIN Dependency Injection Core

There is a newer version: 7.22.0

package org.kodein.di.internal

import org.kodein.di.*
import org.kodein.di.bindings.BindingDI
import org.kodein.di.bindings.ErasedContext

/**
 * DI implementation.
 *
 * Contains almost nothing because the DI object itself contains very few logic.
 * Everything is delegated wither to [container].
 */
internal open class DIImpl internal constructor(private val _container: DIContainerImpl) : DI {

    @Suppress("unused")
    private constructor(builder: DIMainBuilderImpl, runCallbacks: Boolean) : this(DIContainerImpl(builder.containerBuilder, builder.externalSources, builder.fullDescriptionOnError, builder.fullContainerTreeOnError, runCallbacks))

    constructor(allowSilentOverride: Boolean = false, init: DI.MainBuilder.() -> Unit) : this(newBuilder(allowSilentOverride, init), true)

    companion object {
        private fun newBuilder(allowSilentOverride: Boolean = false, init: DI.MainBuilder.() -> Unit) = DIMainBuilderImpl(allowSilentOverride).apply(init)

        fun withDelayedCallbacks(allowSilentOverride: Boolean = false, init: DI.MainBuilder.() -> Unit): Pair Unit> {
            val di = DIImpl(newBuilder(allowSilentOverride, init), false)
            return di to { di._container.initCallbacks?.invoke() ; Unit }
        }
    }

    final override val container: DIContainer by lazy {
        if (_container.initCallbacks != null)
            throw IllegalStateException("DI has not been initialized")
        _container
    }

}

@Suppress("UNCHECKED_CAST")
internal open class BindingDIImpl internal constructor(
        override val directDI: DirectDI,
        private val key: DI.Key,
        private val overrideLevel: Int
) : DirectDI by directDI, BindingDI {
    override fun overriddenFactory(): (Any?) -> Any = container.factory(key, context, overrideLevel + 1) as (Any?) -> Any
    override fun overriddenFactoryOrNull(): ((Any?) -> Any)? = container.factoryOrNull(key, context, overrideLevel + 1) as ((Any?) -> Any)?
    override val context: C get() = directDI.di.diContext.value as C
    override fun onErasedContext(): BindingDI = BindingDIImpl(
        directDI.On(ErasedContext),
        key,
        overrideLevel
    )
}