50 lines
1.5 KiB
Kotlin
50 lines
1.5 KiB
Kotlin
/*
|
|
* Twidere - Twitter client for Android
|
|
*
|
|
* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package org.mariotaku.twidere.data
|
|
|
|
import android.arch.lifecycle.LiveData
|
|
import android.support.annotation.WorkerThread
|
|
import nl.komponents.kovenant.task
|
|
import nl.komponents.kovenant.ui.failUi
|
|
import nl.komponents.kovenant.ui.successUi
|
|
import org.mariotaku.twidere.util.DebugLog
|
|
|
|
abstract class ComputableLiveData<T>(loadOnInstantiate: Boolean) : LiveData<T>() {
|
|
|
|
init {
|
|
if (loadOnInstantiate) {
|
|
load()
|
|
}
|
|
}
|
|
|
|
fun load() {
|
|
task(body = this::compute).successUi {
|
|
postValue(it)
|
|
}.failUi {
|
|
DebugLog.e(msg = "Exception in ComputableLiveData", tr = it)
|
|
postValue(null)
|
|
}
|
|
}
|
|
|
|
@WorkerThread
|
|
protected abstract fun compute(): T
|
|
|
|
}
|