owenclave / app/src/main/java/io/nekohasekai/sagernet/fmt/gson/JsonLazyInterface.java

github - dev - back to tree - upstream
/****************************************************************************** * * * Copyright (C) 2021 by nekohasekai * * * * 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 . * * * ******************************************************************************/ package io.nekohasekai.sagernet.fmt.gson; import androidx.annotation.Nullable; import com.google.gson.Gson; import com.google.gson.JsonElement; import kotlin.Lazy; import kotlin.LazyKt; @SuppressWarnings("unchecked") public abstract class JsonLazyInterface implements Lazy { protected JsonElement content; protected Gson gson; private T value; private boolean fromValue; public JsonLazyInterface() { } public JsonLazyInterface(T value) { this.value = value; this.fromValue = true; } protected final Lazy> type = LazyKt.lazy(() -> (Class) getType()); private final Lazy _value = LazyKt.lazy(this::init); private T init() { if (type.getValue() == null) { return null; } return gson.fromJson(content, type.getValue()); } @Nullable protected abstract Class getType(); @Override public T getValue() { if (fromValue) return value; return _value.getValue(); } @Override public boolean isInitialized() { if (fromValue) return true; return _value.isInitialized(); } }