diff options
Diffstat (limited to 'library/src/main/kotlin/ca/allanwang/kau/kpref/KPrefDelegate.kt')
| -rw-r--r-- | library/src/main/kotlin/ca/allanwang/kau/kpref/KPrefDelegate.kt | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/library/src/main/kotlin/ca/allanwang/kau/kpref/KPrefDelegate.kt b/library/src/main/kotlin/ca/allanwang/kau/kpref/KPrefDelegate.kt deleted file mode 100644 index 4d57ff1..0000000 --- a/library/src/main/kotlin/ca/allanwang/kau/kpref/KPrefDelegate.kt +++ /dev/null @@ -1,89 +0,0 @@ -package ca.allanwang.kau.kpref - -/** - * Created by Allan Wang on 2017-06-07. - */ -private object UNINITIALIZED - -fun KPref.kpref(key: String, fallback: Boolean, postSetter: (value: Boolean) -> Unit = {}): KPrefDelegate<Boolean> = KPrefDelegate(key, fallback, this, postSetter) -fun KPref.kpref(key: String, fallback: Double, postSetter: (value: Float) -> Unit = {}): KPrefDelegate<Float> = KPrefDelegate(key, fallback.toFloat(), this, postSetter) -fun KPref.kpref(key: String, fallback: Float, postSetter: (value: Float) -> Unit = {}): KPrefDelegate<Float> = KPrefDelegate(key, fallback, this, postSetter) -fun KPref.kpref(key: String, fallback: Int, postSetter: (value: Int) -> Unit = {}): KPrefDelegate<Int> = KPrefDelegate(key, fallback, this, postSetter) -fun KPref.kpref(key: String, fallback: Long, postSetter: (value: Long) -> Unit = {}): KPrefDelegate<Long> = KPrefDelegate(key, fallback, this, postSetter) -fun KPref.kpref(key: String, fallback: Set<String>, postSetter: (value: Set<String>) -> Unit = {}): KPrefDelegate<StringSet> = KPrefDelegate(key, StringSet(fallback), this, postSetter) -fun KPref.kpref(key: String, fallback: String, postSetter: (value: String) -> Unit = {}): KPrefDelegate<String> = KPrefDelegate(key, fallback, this, postSetter) - -class StringSet(set: Collection<String>) : LinkedHashSet<String>(set) - -/** - * Implementation of a kpref data item - * Contains a unique key for the shared preference as well as a nonnull fallback item - * Also contains an optional mutable postSetter that will be called every time a new value is given - */ -class KPrefDelegate<T : Any> internal constructor(private val key: String, private val fallback: T, private val pref: KPref, var postSetter: (value: T) -> Unit = {}, lock: Any? = null) : Lazy<T>, java.io.Serializable { - - @Volatile private var _value: Any = UNINITIALIZED - private val lock = lock ?: this - - init { - if (pref.prefMap.containsKey(key)) - throw KPrefException("$key is already used elsewhere in preference ${pref.PREFERENCE_NAME}") - pref.prefMap.put(key, this@KPrefDelegate) - } - - fun invalidate() { - _value = UNINITIALIZED - } - - override val value: T - get() { - val _v1 = _value - if (_v1 !== UNINITIALIZED) - @Suppress("UNCHECKED_CAST") - return _v1 as T - - return synchronized(lock) { - val _v2 = _value - if (_v2 !== UNINITIALIZED) { - @Suppress("UNCHECKED_CAST") - _v2 as T - } else { - _value = when (fallback) { - is Boolean -> pref.sp.getBoolean(key, fallback) - is Float -> pref.sp.getFloat(key, fallback) - is Int -> pref.sp.getInt(key, fallback) - is Long -> pref.sp.getLong(key, fallback) - is StringSet -> StringSet(pref.sp.getStringSet(key, fallback)) - is String -> pref.sp.getString(key, fallback) - else -> throw KPrefException(fallback) - } - @Suppress("UNCHECKED_CAST") - _value as T - } - } - } - - override fun isInitialized(): Boolean = _value !== UNINITIALIZED - - override fun toString(): String = if (isInitialized()) value.toString() else "Lazy kPref $key not initialized yet." - - operator fun setValue(any: Any, property: kotlin.reflect.KProperty<*>, t: T) { - _value = t - val editor = pref.sp.edit() - when (t) { - is Boolean -> editor.putBoolean(key, t) - is Float -> editor.putFloat(key, t) - is Int -> editor.putInt(key, t) - is Long -> editor.putLong(key, t) - is StringSet -> editor.putStringSet(key, t) - is String -> editor.putString(key, t) - else -> throw KPrefException(t) - } - editor.apply() - postSetter.invoke(t) - } -} - -class KPrefException(message: String) : IllegalAccessException(message) { - constructor(element: Any?) : this("Invalid type in pref cache: ${element?.javaClass?.simpleName ?: "null"}") -}
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