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/*
* This file is part of fabric-loom, licensed under the MIT License (MIT).
*
* Copyright (c) 2020-2021 FabricMC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.fabricmc.loom.util.function;
import java.util.Objects;
import java.util.function.BooleanSupplier;
/**
* A lazily computed boolean value.
*
* @author Juuz
*/
public final class LazyBool implements BooleanSupplier {
private BooleanSupplier supplier;
private Boolean value;
public LazyBool(BooleanSupplier supplier) {
this.supplier = Objects.requireNonNull(supplier, "supplier");
}
@Override
public boolean getAsBoolean() {
if (value == null) {
value = supplier.getAsBoolean();
supplier = null; // Release the supplier
}
return value;
}
}
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