51 lines
1.8 KiB
Kotlin
51 lines
1.8 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.extension.lang
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import kotlin.properties.ReadOnlyProperty
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import kotlin.reflect.KProperty
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class ThreadLocalDelegate<T>(initial: () -> T) {
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private var threadLocal: ThreadLocal<T> = PropertyThreadLocal(initial)
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operator fun getValue(thisRef: Any?, property: KProperty<*>): T = threadLocal.get()
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operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
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threadLocal.set(value)
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}
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private class PropertyThreadLocal<T>(val initial: () -> T) : ThreadLocal<T>() {
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override fun initialValue(): T {
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return initial()
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}
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}
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}
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private class ThreadLocalProperty<T>(private val ref: ThreadLocal<T>) : ReadOnlyProperty<Any, T?> {
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override fun getValue(thisRef: Any, property: KProperty<*>): T? = ref.get()
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}
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fun <T> threadLocal(obj: () -> T): ThreadLocalDelegate<T> = ThreadLocalDelegate(obj)
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operator fun <T> ThreadLocal<T>.provideDelegate(thisRef: Any, prop: KProperty<*>): ReadOnlyProperty<Any, T?> =
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ThreadLocalProperty(this) |