io.github.shmilyjxs.utils.LazyInitializer Maven / Gradle / Ivy

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package io.github.shmilyjxs.utils;

public abstract class LazyInitializer {

    private static final Object NO_INIT = new Object();

    private volatile T object = (T) NO_INIT;

    public T get() {
        T result = object;
        if (result == NO_INIT) {
            synchronized (this) {
                result = object;
                if (result == NO_INIT) {
                    object = result = initialize();
                }
            }
        }
        return result;
    }

    protected abstract T initialize();
}