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/*
* Copyright 2018 Allan Wang
*
* 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 ca.allanwang.kau.kpref
import ca.allanwang.kau.kotlin.ILazyResettable
/**
* Created by Allan Wang on 2017-06-07.
*
* Base class for shared preferences
* All objects extending this class must be called in
* the app's [android.app.Application] class
*
* See the [KPref.kpref] extensions for more details
*
* Furthermore, all kprefs are held in the [prefMap],
* so if you wish to reset a preference, you must also invalidate the kpref
* from that map
*/
open class KPref private constructor(
val preferenceName: String,
val builder: KPrefBuilder
) : KPrefBuilder by builder {
constructor(preferenceName: String, factory: KPrefFactory) : this(
preferenceName,
factory.createBuilder(preferenceName)
)
internal val prefMap: MutableMap<String, ILazyResettable<*>> = mutableMapOf()
fun add(entry : KPrefDelegate<*>) {
if (prefMap.containsKey(entry.key))
throw KPrefException("${entry.key} is already used elsewhere in preference $preferenceName")
prefMap[entry.key] = entry
}
fun reset() {
prefMap.values.forEach { it.invalidate() }
}
operator fun get(key: String): ILazyResettable<*>? = prefMap[key]
}
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