37 lines
1.0 KiB
Java
37 lines
1.0 KiB
Java
/*
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* Copyright 2021 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.buffer.api.tests;
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import java.util.function.Supplier;
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final class Memoize<T> implements Supplier<T> {
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private final Supplier<T> supplier;
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private volatile T memo;
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Memoize(Supplier<T> supplier) {
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this.supplier = supplier;
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}
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@Override
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public T get() {
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T val = memo;
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if (val == null) {
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memo = val = supplier.get();
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}
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return val;
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}
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}
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